Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Generic OPP Interface |
| 3 | * |
| 4 | * Copyright (C) 2009-2010 Texas Instruments Incorporated. |
| 5 | * Nishanth Menon |
| 6 | * Romit Dasgupta |
| 7 | * Kevin Hilman |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Viresh Kumar | d6d2a52 | 2015-10-17 09:45:18 +0530 | [diff] [blame] | 14 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 15 | |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 16 | #include <linux/clk.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 17 | #include <linux/errno.h> |
| 18 | #include <linux/err.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 19 | #include <linux/slab.h> |
Paul Gortmaker | 51990e8 | 2012-01-22 11:23:42 -0500 | [diff] [blame] | 20 | #include <linux/device.h> |
Liam Girdwood | 80126ce | 2012-10-23 01:27:44 +0200 | [diff] [blame] | 21 | #include <linux/export.h> |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 22 | #include <linux/regulator/consumer.h> |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 23 | |
Viresh Kumar | f59d3ee | 2015-09-04 13:47:26 +0530 | [diff] [blame] | 24 | #include "opp.h" |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 25 | |
| 26 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 27 | * The root of the list of all opp-tables. All opp_table structures branch off |
| 28 | * from here, with each opp_table containing the list of opps it supports in |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 29 | * various states of availability. |
| 30 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 31 | LIST_HEAD(opp_tables); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 32 | /* Lock to allow exclusive modification to the device and opp lists */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 33 | DEFINE_MUTEX(opp_table_lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 34 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 35 | static void dev_pm_opp_get(struct dev_pm_opp *opp); |
| 36 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 37 | static struct opp_device *_find_opp_dev(const struct device *dev, |
| 38 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 39 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 40 | struct opp_device *opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 41 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 42 | list_for_each_entry(opp_dev, &opp_table->dev_list, node) |
| 43 | if (opp_dev->dev == dev) |
| 44 | return opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 45 | |
| 46 | return NULL; |
| 47 | } |
| 48 | |
Wei Yongjun | 6ac4239 | 2017-02-06 14:29:55 +0000 | [diff] [blame] | 49 | static struct opp_table *_find_opp_table_unlocked(struct device *dev) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 50 | { |
| 51 | struct opp_table *opp_table; |
| 52 | |
| 53 | list_for_each_entry(opp_table, &opp_tables, node) { |
| 54 | if (_find_opp_dev(dev, opp_table)) { |
| 55 | _get_opp_table_kref(opp_table); |
| 56 | |
| 57 | return opp_table; |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | return ERR_PTR(-ENODEV); |
| 62 | } |
| 63 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 64 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 65 | * _find_opp_table() - find opp_table struct using device pointer |
| 66 | * @dev: device pointer used to lookup OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 67 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 68 | * Search OPP table for one containing matching device. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 69 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 70 | * Return: pointer to 'struct opp_table' if found, otherwise -ENODEV or |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 71 | * -EINVAL based on type of error. |
| 72 | * |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 73 | * The callers must call dev_pm_opp_put_opp_table() after the table is used. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 74 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 75 | struct opp_table *_find_opp_table(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 76 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 77 | struct opp_table *opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 78 | |
Viresh Kumar | 50a3cb0 | 2015-08-12 15:59:39 +0530 | [diff] [blame] | 79 | if (IS_ERR_OR_NULL(dev)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 80 | pr_err("%s: Invalid parameters\n", __func__); |
| 81 | return ERR_PTR(-EINVAL); |
| 82 | } |
| 83 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 84 | mutex_lock(&opp_table_lock); |
| 85 | opp_table = _find_opp_table_unlocked(dev); |
| 86 | mutex_unlock(&opp_table_lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 87 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 88 | return opp_table; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 89 | } |
| 90 | |
| 91 | /** |
Linus Torvalds | baf51c4 | 2015-11-11 09:03:01 -0800 | [diff] [blame] | 92 | * dev_pm_opp_get_voltage() - Gets the voltage corresponding to an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 93 | * @opp: opp for which voltage has to be returned for |
| 94 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 95 | * Return: voltage in micro volt corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 96 | * return 0 |
| 97 | * |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 98 | * This is useful only for devices with single power supply. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 99 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 100 | unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 101 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 102 | if (IS_ERR_OR_NULL(opp)) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 103 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 104 | return 0; |
| 105 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 106 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 107 | return opp->supplies[0].u_volt; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 108 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 109 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_voltage); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 110 | |
| 111 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 112 | * dev_pm_opp_get_freq() - Gets the frequency corresponding to an available opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 113 | * @opp: opp for which frequency has to be returned for |
| 114 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 115 | * Return: frequency in hertz corresponding to the opp, else |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 116 | * return 0 |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 117 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 118 | unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 119 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 120 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 121 | pr_err("%s: Invalid parameters\n", __func__); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 122 | return 0; |
| 123 | } |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 124 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 125 | return opp->rate; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 126 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 127 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 128 | |
| 129 | /** |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 130 | * dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not |
| 131 | * @opp: opp for which turbo mode is being verified |
| 132 | * |
| 133 | * Turbo OPPs are not for normal use, and can be enabled (under certain |
| 134 | * conditions) for short duration of times to finish high throughput work |
| 135 | * quickly. Running on them for longer times may overheat the chip. |
| 136 | * |
| 137 | * Return: true if opp is turbo opp, else false. |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 138 | */ |
| 139 | bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp) |
| 140 | { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 141 | if (IS_ERR_OR_NULL(opp) || !opp->available) { |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 142 | pr_err("%s: Invalid parameters\n", __func__); |
| 143 | return false; |
| 144 | } |
| 145 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 146 | return opp->turbo; |
Bartlomiej Zolnierkiewicz | 19445b2 | 2015-07-09 17:43:35 +0200 | [diff] [blame] | 147 | } |
| 148 | EXPORT_SYMBOL_GPL(dev_pm_opp_is_turbo); |
| 149 | |
| 150 | /** |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 151 | * dev_pm_opp_get_max_clock_latency() - Get max clock latency in nanoseconds |
| 152 | * @dev: device for which we do this operation |
| 153 | * |
| 154 | * Return: This function returns the max clock latency in nanoseconds. |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 155 | */ |
| 156 | unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev) |
| 157 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 158 | struct opp_table *opp_table; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 159 | unsigned long clock_latency_ns; |
| 160 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 161 | opp_table = _find_opp_table(dev); |
| 162 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 163 | return 0; |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 164 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 165 | clock_latency_ns = opp_table->clock_latency_ns_max; |
| 166 | |
| 167 | dev_pm_opp_put_opp_table(opp_table); |
| 168 | |
Viresh Kumar | 3ca9bb3 | 2015-07-29 16:23:03 +0530 | [diff] [blame] | 169 | return clock_latency_ns; |
| 170 | } |
| 171 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_clock_latency); |
| 172 | |
| 173 | /** |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 174 | * dev_pm_opp_get_max_volt_latency() - Get max voltage latency in nanoseconds |
| 175 | * @dev: device for which we do this operation |
| 176 | * |
| 177 | * Return: This function returns the max voltage latency in nanoseconds. |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 178 | */ |
| 179 | unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev) |
| 180 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 181 | struct opp_table *opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 182 | struct dev_pm_opp *opp; |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 183 | struct regulator *reg; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 184 | unsigned long latency_ns = 0; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 185 | int ret, i, count; |
| 186 | struct { |
| 187 | unsigned long min; |
| 188 | unsigned long max; |
| 189 | } *uV; |
| 190 | |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 191 | opp_table = _find_opp_table(dev); |
| 192 | if (IS_ERR(opp_table)) |
| 193 | return 0; |
| 194 | |
| 195 | count = opp_table->regulator_count; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 196 | |
| 197 | /* Regulator may not be required for the device */ |
| 198 | if (!count) |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 199 | goto put_opp_table; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 200 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 201 | uV = kmalloc_array(count, sizeof(*uV), GFP_KERNEL); |
| 202 | if (!uV) |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 203 | goto put_opp_table; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 204 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 205 | mutex_lock(&opp_table->lock); |
| 206 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 207 | for (i = 0; i < count; i++) { |
| 208 | uV[i].min = ~0; |
| 209 | uV[i].max = 0; |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 210 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 211 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 212 | if (!opp->available) |
| 213 | continue; |
| 214 | |
| 215 | if (opp->supplies[i].u_volt_min < uV[i].min) |
| 216 | uV[i].min = opp->supplies[i].u_volt_min; |
| 217 | if (opp->supplies[i].u_volt_max > uV[i].max) |
| 218 | uV[i].max = opp->supplies[i].u_volt_max; |
| 219 | } |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 220 | } |
| 221 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 222 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 223 | |
| 224 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 225 | * The caller needs to ensure that opp_table (and hence the regulator) |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 226 | * isn't freed, while we are executing this routine. |
| 227 | */ |
Andrzej Hajda | 8cc3111 | 2017-02-20 19:57:57 +0100 | [diff] [blame] | 228 | for (i = 0; i < count; i++) { |
Viresh Kumar | 478256b | 2017-05-23 09:32:11 +0530 | [diff] [blame] | 229 | reg = opp_table->regulators[i]; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 230 | ret = regulator_set_voltage_time(reg, uV[i].min, uV[i].max); |
| 231 | if (ret > 0) |
| 232 | latency_ns += ret * 1000; |
| 233 | } |
| 234 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 235 | kfree(uV); |
Viresh Kumar | cdd3e61 | 2017-01-23 10:11:51 +0530 | [diff] [blame] | 236 | put_opp_table: |
| 237 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 655c9df | 2016-02-09 10:30:35 +0530 | [diff] [blame] | 238 | |
| 239 | return latency_ns; |
| 240 | } |
| 241 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_volt_latency); |
| 242 | |
| 243 | /** |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 244 | * dev_pm_opp_get_max_transition_latency() - Get max transition latency in |
| 245 | * nanoseconds |
| 246 | * @dev: device for which we do this operation |
| 247 | * |
| 248 | * Return: This function returns the max transition latency, in nanoseconds, to |
| 249 | * switch from one OPP to other. |
Viresh Kumar | 2174344 | 2016-02-09 10:30:36 +0530 | [diff] [blame] | 250 | */ |
| 251 | unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev) |
| 252 | { |
| 253 | return dev_pm_opp_get_max_volt_latency(dev) + |
| 254 | dev_pm_opp_get_max_clock_latency(dev); |
| 255 | } |
| 256 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_max_transition_latency); |
| 257 | |
| 258 | /** |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 259 | * dev_pm_opp_get_suspend_opp_freq() - Get frequency of suspend opp in Hz |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 260 | * @dev: device for which we do this operation |
| 261 | * |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 262 | * Return: This function returns the frequency of the OPP marked as suspend_opp |
| 263 | * if one is available, else returns 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 264 | */ |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 265 | unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev) |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 266 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 267 | struct opp_table *opp_table; |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 268 | unsigned long freq = 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 269 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 270 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 271 | if (IS_ERR(opp_table)) |
| 272 | return 0; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 273 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 274 | if (opp_table->suspend_opp && opp_table->suspend_opp->available) |
| 275 | freq = dev_pm_opp_get_freq(opp_table->suspend_opp); |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 276 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 277 | dev_pm_opp_put_opp_table(opp_table); |
| 278 | |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 279 | return freq; |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 280 | } |
Viresh Kumar | 3aa26a3 | 2017-01-02 14:41:02 +0530 | [diff] [blame] | 281 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq); |
Bartlomiej Zolnierkiewicz | 4eafbd1 | 2015-09-08 18:41:01 +0200 | [diff] [blame] | 282 | |
| 283 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 284 | * dev_pm_opp_get_opp_count() - Get number of opps available in the opp table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 285 | * @dev: device for which we do this operation |
| 286 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 287 | * Return: This function returns the number of available opps if there are any, |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 288 | * else returns 0 if none or the corresponding error value. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 289 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 290 | int dev_pm_opp_get_opp_count(struct device *dev) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 291 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 292 | struct opp_table *opp_table; |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 293 | struct dev_pm_opp *temp_opp; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 294 | int count = 0; |
| 295 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 296 | opp_table = _find_opp_table(dev); |
| 297 | if (IS_ERR(opp_table)) { |
| 298 | count = PTR_ERR(opp_table); |
Fabio Estevam | 035ed07 | 2017-09-29 14:39:49 -0300 | [diff] [blame^] | 299 | dev_dbg(dev, "%s: OPP table not found (%d)\n", |
Dmitry Torokhov | b4718c0 | 2014-12-16 15:09:38 -0800 | [diff] [blame] | 300 | __func__, count); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 301 | return count; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 302 | } |
| 303 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 304 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 305 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 306 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 307 | if (temp_opp->available) |
| 308 | count++; |
| 309 | } |
| 310 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 311 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 312 | dev_pm_opp_put_opp_table(opp_table); |
| 313 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 314 | return count; |
| 315 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 316 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_count); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 317 | |
| 318 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 319 | * dev_pm_opp_find_freq_exact() - search for an exact frequency |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 320 | * @dev: device for which we do this operation |
| 321 | * @freq: frequency to search for |
Nishanth Menon | 7ae4961 | 2011-02-25 23:46:18 +0100 | [diff] [blame] | 322 | * @available: true/false - match for available opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 323 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 324 | * Return: Searches for exact match in the opp table and returns pointer to the |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 325 | * matching opp if found, else returns ERR_PTR in case of error and should |
| 326 | * be handled using IS_ERR. Error return values can be: |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 327 | * EINVAL: for bad pointer |
| 328 | * ERANGE: no match found for search |
| 329 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 330 | * |
| 331 | * Note: available is a modifier for the search. if available=true, then the |
| 332 | * match is for exact matching frequency and is available in the stored OPP |
| 333 | * table. if false, the match is for exact frequency which is not available. |
| 334 | * |
| 335 | * This provides a mechanism to enable an opp which is not available currently |
| 336 | * or the opposite as well. |
| 337 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 338 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 339 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 340 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 341 | struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev, |
| 342 | unsigned long freq, |
| 343 | bool available) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 344 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 345 | struct opp_table *opp_table; |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 346 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 347 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 348 | opp_table = _find_opp_table(dev); |
| 349 | if (IS_ERR(opp_table)) { |
| 350 | int r = PTR_ERR(opp_table); |
| 351 | |
| 352 | dev_err(dev, "%s: OPP table not found (%d)\n", __func__, r); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 353 | return ERR_PTR(r); |
| 354 | } |
| 355 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 356 | mutex_lock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 357 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 358 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 359 | if (temp_opp->available == available && |
| 360 | temp_opp->rate == freq) { |
| 361 | opp = temp_opp; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 362 | |
| 363 | /* Increment the reference count of OPP */ |
| 364 | dev_pm_opp_get(opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 365 | break; |
| 366 | } |
| 367 | } |
| 368 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 369 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 370 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 371 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 372 | return opp; |
| 373 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 374 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_exact); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 375 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 376 | static noinline struct dev_pm_opp *_find_freq_ceil(struct opp_table *opp_table, |
| 377 | unsigned long *freq) |
| 378 | { |
| 379 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
| 380 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 381 | mutex_lock(&opp_table->lock); |
| 382 | |
| 383 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 384 | if (temp_opp->available && temp_opp->rate >= *freq) { |
| 385 | opp = temp_opp; |
| 386 | *freq = opp->rate; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 387 | |
| 388 | /* Increment the reference count of OPP */ |
| 389 | dev_pm_opp_get(opp); |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 390 | break; |
| 391 | } |
| 392 | } |
| 393 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 394 | mutex_unlock(&opp_table->lock); |
| 395 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 396 | return opp; |
| 397 | } |
| 398 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 399 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 400 | * dev_pm_opp_find_freq_ceil() - Search for an rounded ceil freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 401 | * @dev: device for which we do this operation |
| 402 | * @freq: Start frequency |
| 403 | * |
| 404 | * Search for the matching ceil *available* OPP from a starting freq |
| 405 | * for a device. |
| 406 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 407 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 408 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 409 | * values can be: |
| 410 | * EINVAL: for bad pointer |
| 411 | * ERANGE: no match found for search |
| 412 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 413 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 414 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 415 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 416 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 417 | struct dev_pm_opp *dev_pm_opp_find_freq_ceil(struct device *dev, |
| 418 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 419 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 420 | struct opp_table *opp_table; |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 421 | struct dev_pm_opp *opp; |
Dmitry Torokhov | b02ded2 | 2014-12-16 15:09:36 -0800 | [diff] [blame] | 422 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 423 | if (!dev || !freq) { |
| 424 | dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); |
| 425 | return ERR_PTR(-EINVAL); |
| 426 | } |
| 427 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 428 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 429 | if (IS_ERR(opp_table)) |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 430 | return ERR_CAST(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 431 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 432 | opp = _find_freq_ceil(opp_table, freq); |
| 433 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 434 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 435 | |
| 436 | return opp; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 437 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 438 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_ceil); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 439 | |
| 440 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 441 | * dev_pm_opp_find_freq_floor() - Search for a rounded floor freq |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 442 | * @dev: device for which we do this operation |
| 443 | * @freq: Start frequency |
| 444 | * |
| 445 | * Search for the matching floor *available* OPP from a starting freq |
| 446 | * for a device. |
| 447 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 448 | * Return: matching *opp and refreshes *freq accordingly, else returns |
Nishanth Menon | 0779726 | 2012-10-24 22:00:12 +0200 | [diff] [blame] | 449 | * ERR_PTR in case of error and should be handled using IS_ERR. Error return |
| 450 | * values can be: |
| 451 | * EINVAL: for bad pointer |
| 452 | * ERANGE: no match found for search |
| 453 | * ENODEV: if device not found in list of registered devices |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 454 | * |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 455 | * The callers are required to call dev_pm_opp_put() for the returned OPP after |
| 456 | * use. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 457 | */ |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 458 | struct dev_pm_opp *dev_pm_opp_find_freq_floor(struct device *dev, |
| 459 | unsigned long *freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 460 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 461 | struct opp_table *opp_table; |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 462 | struct dev_pm_opp *temp_opp, *opp = ERR_PTR(-ERANGE); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 463 | |
| 464 | if (!dev || !freq) { |
| 465 | dev_err(dev, "%s: Invalid argument freq=%p\n", __func__, freq); |
| 466 | return ERR_PTR(-EINVAL); |
| 467 | } |
| 468 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 469 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 470 | if (IS_ERR(opp_table)) |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 471 | return ERR_CAST(opp_table); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 472 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 473 | mutex_lock(&opp_table->lock); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 474 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 475 | list_for_each_entry(temp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 476 | if (temp_opp->available) { |
| 477 | /* go to the next node, before choosing prev */ |
| 478 | if (temp_opp->rate > *freq) |
| 479 | break; |
| 480 | else |
| 481 | opp = temp_opp; |
| 482 | } |
| 483 | } |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 484 | |
| 485 | /* Increment the reference count of OPP */ |
| 486 | if (!IS_ERR(opp)) |
| 487 | dev_pm_opp_get(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 488 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 489 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 490 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 491 | if (!IS_ERR(opp)) |
| 492 | *freq = opp->rate; |
| 493 | |
| 494 | return opp; |
| 495 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 496 | EXPORT_SYMBOL_GPL(dev_pm_opp_find_freq_floor); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 497 | |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 498 | static int _set_opp_voltage(struct device *dev, struct regulator *reg, |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 499 | struct dev_pm_opp_supply *supply) |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 500 | { |
| 501 | int ret; |
| 502 | |
| 503 | /* Regulator not available for device */ |
| 504 | if (IS_ERR(reg)) { |
| 505 | dev_dbg(dev, "%s: regulator not available: %ld\n", __func__, |
| 506 | PTR_ERR(reg)); |
| 507 | return 0; |
| 508 | } |
| 509 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 510 | dev_dbg(dev, "%s: voltages (mV): %lu %lu %lu\n", __func__, |
| 511 | supply->u_volt_min, supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 512 | |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 513 | ret = regulator_set_voltage_triplet(reg, supply->u_volt_min, |
| 514 | supply->u_volt, supply->u_volt_max); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 515 | if (ret) |
| 516 | dev_err(dev, "%s: failed to set voltage (%lu %lu %lu mV): %d\n", |
Viresh Kumar | ce31781 | 2016-12-01 16:28:18 +0530 | [diff] [blame] | 517 | __func__, supply->u_volt_min, supply->u_volt, |
| 518 | supply->u_volt_max, ret); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 519 | |
| 520 | return ret; |
| 521 | } |
| 522 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 523 | static inline int |
| 524 | _generic_set_opp_clk_only(struct device *dev, struct clk *clk, |
| 525 | unsigned long old_freq, unsigned long freq) |
| 526 | { |
| 527 | int ret; |
| 528 | |
| 529 | ret = clk_set_rate(clk, freq); |
| 530 | if (ret) { |
| 531 | dev_err(dev, "%s: failed to set clock rate: %d\n", __func__, |
| 532 | ret); |
| 533 | } |
| 534 | |
| 535 | return ret; |
| 536 | } |
| 537 | |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 538 | static int _generic_set_opp_regulator(const struct opp_table *opp_table, |
| 539 | struct device *dev, |
| 540 | unsigned long old_freq, |
| 541 | unsigned long freq, |
| 542 | struct dev_pm_opp_supply *old_supply, |
| 543 | struct dev_pm_opp_supply *new_supply) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 544 | { |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 545 | struct regulator *reg = opp_table->regulators[0]; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 546 | int ret; |
| 547 | |
| 548 | /* This function only supports single regulator per device */ |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 549 | if (WARN_ON(opp_table->regulator_count > 1)) { |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 550 | dev_err(dev, "multiple regulators are not supported\n"); |
| 551 | return -EINVAL; |
| 552 | } |
| 553 | |
| 554 | /* Scaling up? Scale voltage before frequency */ |
| 555 | if (freq > old_freq) { |
| 556 | ret = _set_opp_voltage(dev, reg, new_supply); |
| 557 | if (ret) |
| 558 | goto restore_voltage; |
| 559 | } |
| 560 | |
| 561 | /* Change frequency */ |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 562 | ret = _generic_set_opp_clk_only(dev, opp_table->clk, old_freq, freq); |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 563 | if (ret) |
| 564 | goto restore_voltage; |
| 565 | |
| 566 | /* Scaling down? Scale voltage after frequency */ |
| 567 | if (freq < old_freq) { |
| 568 | ret = _set_opp_voltage(dev, reg, new_supply); |
| 569 | if (ret) |
| 570 | goto restore_freq; |
| 571 | } |
| 572 | |
| 573 | return 0; |
| 574 | |
| 575 | restore_freq: |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 576 | if (_generic_set_opp_clk_only(dev, opp_table->clk, freq, old_freq)) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 577 | dev_err(dev, "%s: failed to restore old-freq (%lu Hz)\n", |
| 578 | __func__, old_freq); |
| 579 | restore_voltage: |
| 580 | /* This shouldn't harm even if the voltages weren't updated earlier */ |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 581 | if (old_supply) |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 582 | _set_opp_voltage(dev, reg, old_supply); |
| 583 | |
| 584 | return ret; |
| 585 | } |
| 586 | |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 587 | /** |
| 588 | * dev_pm_opp_set_rate() - Configure new OPP based on frequency |
| 589 | * @dev: device for which we do this operation |
| 590 | * @target_freq: frequency to achieve |
| 591 | * |
| 592 | * This configures the power-supplies and clock source to the levels specified |
| 593 | * by the OPP corresponding to the target_freq. |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 594 | */ |
| 595 | int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) |
| 596 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 597 | struct opp_table *opp_table; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 598 | unsigned long freq, old_freq; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 599 | struct dev_pm_opp *old_opp, *opp; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 600 | struct clk *clk; |
| 601 | int ret, size; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 602 | |
| 603 | if (unlikely(!target_freq)) { |
| 604 | dev_err(dev, "%s: Invalid target frequency %lu\n", __func__, |
| 605 | target_freq); |
| 606 | return -EINVAL; |
| 607 | } |
| 608 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 609 | opp_table = _find_opp_table(dev); |
| 610 | if (IS_ERR(opp_table)) { |
| 611 | dev_err(dev, "%s: device opp doesn't exist\n", __func__); |
| 612 | return PTR_ERR(opp_table); |
| 613 | } |
| 614 | |
| 615 | clk = opp_table->clk; |
| 616 | if (IS_ERR(clk)) { |
| 617 | dev_err(dev, "%s: No clock available for the device\n", |
| 618 | __func__); |
| 619 | ret = PTR_ERR(clk); |
| 620 | goto put_opp_table; |
| 621 | } |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 622 | |
| 623 | freq = clk_round_rate(clk, target_freq); |
| 624 | if ((long)freq <= 0) |
| 625 | freq = target_freq; |
| 626 | |
| 627 | old_freq = clk_get_rate(clk); |
| 628 | |
| 629 | /* Return early if nothing to do */ |
| 630 | if (old_freq == freq) { |
| 631 | dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n", |
| 632 | __func__, freq); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 633 | ret = 0; |
| 634 | goto put_opp_table; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 635 | } |
| 636 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 637 | old_opp = _find_freq_ceil(opp_table, &old_freq); |
Arnd Bergmann | 4df27c9 | 2016-09-15 17:38:38 +0200 | [diff] [blame] | 638 | if (IS_ERR(old_opp)) { |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 639 | dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n", |
| 640 | __func__, old_freq, PTR_ERR(old_opp)); |
| 641 | } |
| 642 | |
Jisheng Zhang | 067b7ce | 2016-07-25 14:11:16 +0800 | [diff] [blame] | 643 | opp = _find_freq_ceil(opp_table, &freq); |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 644 | if (IS_ERR(opp)) { |
| 645 | ret = PTR_ERR(opp); |
| 646 | dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n", |
| 647 | __func__, freq, ret); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 648 | goto put_old_opp; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 649 | } |
| 650 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 651 | dev_dbg(dev, "%s: switching OPP: %lu Hz --> %lu Hz\n", __func__, |
| 652 | old_freq, freq); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 653 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 654 | /* Only frequency scaling */ |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 655 | if (!opp_table->regulators) { |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 656 | ret = _generic_set_opp_clk_only(dev, clk, old_freq, freq); |
Viresh Kumar | c74b32f | 2017-05-23 09:32:10 +0530 | [diff] [blame] | 657 | } else if (!opp_table->set_opp) { |
| 658 | ret = _generic_set_opp_regulator(opp_table, dev, old_freq, freq, |
| 659 | IS_ERR(old_opp) ? NULL : old_opp->supplies, |
| 660 | opp->supplies); |
| 661 | } else { |
| 662 | struct dev_pm_set_opp_data *data; |
| 663 | |
| 664 | data = opp_table->set_opp_data; |
| 665 | data->regulators = opp_table->regulators; |
| 666 | data->regulator_count = opp_table->regulator_count; |
| 667 | data->clk = clk; |
| 668 | data->dev = dev; |
| 669 | |
| 670 | data->old_opp.rate = old_freq; |
| 671 | size = sizeof(*opp->supplies) * opp_table->regulator_count; |
| 672 | if (IS_ERR(old_opp)) |
| 673 | memset(data->old_opp.supplies, 0, size); |
| 674 | else |
| 675 | memcpy(data->old_opp.supplies, old_opp->supplies, size); |
| 676 | |
| 677 | data->new_opp.rate = freq; |
| 678 | memcpy(data->new_opp.supplies, opp->supplies, size); |
| 679 | |
| 680 | ret = opp_table->set_opp(data); |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 681 | } |
| 682 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 683 | dev_pm_opp_put(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 684 | put_old_opp: |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 685 | if (!IS_ERR(old_opp)) |
| 686 | dev_pm_opp_put(old_opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 687 | put_opp_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 688 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 689 | return ret; |
Viresh Kumar | 6a0712f | 2016-02-09 10:30:39 +0530 | [diff] [blame] | 690 | } |
| 691 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_rate); |
| 692 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 693 | /* OPP-dev Helpers */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 694 | static void _remove_opp_dev(struct opp_device *opp_dev, |
| 695 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 696 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 697 | opp_debug_unregister(opp_dev, opp_table); |
| 698 | list_del(&opp_dev->node); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 699 | kfree(opp_dev); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 700 | } |
| 701 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 702 | struct opp_device *_add_opp_dev(const struct device *dev, |
| 703 | struct opp_table *opp_table) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 704 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 705 | struct opp_device *opp_dev; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 706 | int ret; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 707 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 708 | opp_dev = kzalloc(sizeof(*opp_dev), GFP_KERNEL); |
| 709 | if (!opp_dev) |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 710 | return NULL; |
| 711 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 712 | /* Initialize opp-dev */ |
| 713 | opp_dev->dev = dev; |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 714 | list_add(&opp_dev->node, &opp_table->dev_list); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 715 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 716 | /* Create debugfs entries for the opp_table */ |
| 717 | ret = opp_debug_register(opp_dev, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 718 | if (ret) |
| 719 | dev_err(dev, "%s: Failed to register opp debugfs (%d)\n", |
| 720 | __func__, ret); |
| 721 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 722 | return opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 723 | } |
| 724 | |
Viresh Kumar | b6160e2 | 2017-01-02 14:41:04 +0530 | [diff] [blame] | 725 | static struct opp_table *_allocate_opp_table(struct device *dev) |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 726 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 727 | struct opp_table *opp_table; |
| 728 | struct opp_device *opp_dev; |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 729 | int ret; |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 730 | |
| 731 | /* |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 732 | * Allocate a new OPP table. In the infrequent case where a new |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 733 | * device is needed to be added, we pay this penalty. |
| 734 | */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 735 | opp_table = kzalloc(sizeof(*opp_table), GFP_KERNEL); |
| 736 | if (!opp_table) |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 737 | return NULL; |
| 738 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 739 | INIT_LIST_HEAD(&opp_table->dev_list); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 740 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 741 | opp_dev = _add_opp_dev(dev, opp_table); |
| 742 | if (!opp_dev) { |
| 743 | kfree(opp_table); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 744 | return NULL; |
| 745 | } |
| 746 | |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 747 | _of_init_opp_table(opp_table, dev); |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 748 | |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 749 | /* Find clk for the device */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 750 | opp_table->clk = clk_get(dev, NULL); |
| 751 | if (IS_ERR(opp_table->clk)) { |
| 752 | ret = PTR_ERR(opp_table->clk); |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 753 | if (ret != -EPROBE_DEFER) |
| 754 | dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, |
| 755 | ret); |
| 756 | } |
| 757 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 758 | BLOCKING_INIT_NOTIFIER_HEAD(&opp_table->head); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 759 | INIT_LIST_HEAD(&opp_table->opp_list); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 760 | mutex_init(&opp_table->lock); |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 761 | kref_init(&opp_table->kref); |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 762 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 763 | /* Secure the device table modification */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 764 | list_add(&opp_table->node, &opp_tables); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 765 | return opp_table; |
Viresh Kumar | 07cce74 | 2014-12-10 09:45:34 +0530 | [diff] [blame] | 766 | } |
| 767 | |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 768 | void _get_opp_table_kref(struct opp_table *opp_table) |
Viresh Kumar | 3bac42c | 2015-07-29 16:22:59 +0530 | [diff] [blame] | 769 | { |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 770 | kref_get(&opp_table->kref); |
| 771 | } |
| 772 | |
| 773 | struct opp_table *dev_pm_opp_get_opp_table(struct device *dev) |
| 774 | { |
| 775 | struct opp_table *opp_table; |
| 776 | |
| 777 | /* Hold our table modification lock here */ |
| 778 | mutex_lock(&opp_table_lock); |
| 779 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 780 | opp_table = _find_opp_table_unlocked(dev); |
| 781 | if (!IS_ERR(opp_table)) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 782 | goto unlock; |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 783 | |
| 784 | opp_table = _allocate_opp_table(dev); |
| 785 | |
| 786 | unlock: |
| 787 | mutex_unlock(&opp_table_lock); |
| 788 | |
| 789 | return opp_table; |
| 790 | } |
| 791 | EXPORT_SYMBOL_GPL(dev_pm_opp_get_opp_table); |
| 792 | |
Viresh Kumar | b83c189 | 2017-01-23 10:11:45 +0530 | [diff] [blame] | 793 | static void _opp_table_kref_release(struct kref *kref) |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 794 | { |
| 795 | struct opp_table *opp_table = container_of(kref, struct opp_table, kref); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 796 | struct opp_device *opp_dev; |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 797 | |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 798 | /* Release clk */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 799 | if (!IS_ERR(opp_table->clk)) |
| 800 | clk_put(opp_table->clk); |
Viresh Kumar | d54974c | 2016-02-09 10:30:38 +0530 | [diff] [blame] | 801 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 802 | opp_dev = list_first_entry(&opp_table->dev_list, struct opp_device, |
| 803 | node); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 804 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 805 | _remove_opp_dev(opp_dev, opp_table); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 806 | |
| 807 | /* dev_list must be empty now */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 808 | WARN_ON(!list_empty(&opp_table->dev_list)); |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 809 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 810 | mutex_destroy(&opp_table->lock); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 811 | list_del(&opp_table->node); |
| 812 | kfree(opp_table); |
Viresh Kumar | 3bac42c | 2015-07-29 16:22:59 +0530 | [diff] [blame] | 813 | |
Viresh Kumar | f067a98 | 2017-01-23 10:11:42 +0530 | [diff] [blame] | 814 | mutex_unlock(&opp_table_lock); |
| 815 | } |
| 816 | |
| 817 | void dev_pm_opp_put_opp_table(struct opp_table *opp_table) |
| 818 | { |
| 819 | kref_put_mutex(&opp_table->kref, _opp_table_kref_release, |
| 820 | &opp_table_lock); |
| 821 | } |
| 822 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_opp_table); |
| 823 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 824 | void _opp_free(struct dev_pm_opp *opp) |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 825 | { |
| 826 | kfree(opp); |
Viresh Kumar | 969fceb | 2017-01-02 14:40:59 +0530 | [diff] [blame] | 827 | } |
| 828 | |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 829 | static void _opp_kref_release(struct kref *kref) |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 830 | { |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 831 | struct dev_pm_opp *opp = container_of(kref, struct dev_pm_opp, kref); |
| 832 | struct opp_table *opp_table = opp->opp_table; |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 833 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 834 | /* |
| 835 | * Notify the changes in the availability of the operable |
| 836 | * frequency/voltage list. |
| 837 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 838 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_REMOVE, opp); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 839 | opp_debug_remove_one(opp); |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 840 | list_del(&opp->node); |
| 841 | kfree(opp); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 842 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 843 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | 31641cd | 2017-01-23 10:11:44 +0530 | [diff] [blame] | 844 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 845 | } |
| 846 | |
Viresh Kumar | 8a31d9d9 | 2017-01-23 10:11:47 +0530 | [diff] [blame] | 847 | static void dev_pm_opp_get(struct dev_pm_opp *opp) |
| 848 | { |
| 849 | kref_get(&opp->kref); |
| 850 | } |
| 851 | |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 852 | void dev_pm_opp_put(struct dev_pm_opp *opp) |
| 853 | { |
| 854 | kref_put_mutex(&opp->kref, _opp_kref_release, &opp->opp_table->lock); |
| 855 | } |
| 856 | EXPORT_SYMBOL_GPL(dev_pm_opp_put); |
| 857 | |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 858 | /** |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 859 | * dev_pm_opp_remove() - Remove an OPP from OPP table |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 860 | * @dev: device for which we do this operation |
| 861 | * @freq: OPP to remove with matching 'freq' |
| 862 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 863 | * This function removes an opp from the opp table. |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 864 | */ |
| 865 | void dev_pm_opp_remove(struct device *dev, unsigned long freq) |
| 866 | { |
| 867 | struct dev_pm_opp *opp; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 868 | struct opp_table *opp_table; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 869 | bool found = false; |
| 870 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 871 | opp_table = _find_opp_table(dev); |
| 872 | if (IS_ERR(opp_table)) |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 873 | return; |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 874 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 875 | mutex_lock(&opp_table->lock); |
| 876 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 877 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 878 | if (opp->rate == freq) { |
| 879 | found = true; |
| 880 | break; |
| 881 | } |
| 882 | } |
| 883 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 884 | mutex_unlock(&opp_table->lock); |
| 885 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 886 | if (found) { |
| 887 | dev_pm_opp_put(opp); |
| 888 | } else { |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 889 | dev_warn(dev, "%s: Couldn't find OPP with freq: %lu\n", |
| 890 | __func__, freq); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 891 | } |
| 892 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 893 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 894 | } |
| 895 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove); |
| 896 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 897 | struct dev_pm_opp *_opp_allocate(struct opp_table *table) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 898 | { |
| 899 | struct dev_pm_opp *opp; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 900 | int count, supply_size; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 901 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 902 | /* Allocate space for at least one supply */ |
| 903 | count = table->regulator_count ? table->regulator_count : 1; |
| 904 | supply_size = sizeof(*opp->supplies) * count; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 905 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 906 | /* allocate new OPP node and supplies structures */ |
| 907 | opp = kzalloc(sizeof(*opp) + supply_size, GFP_KERNEL); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 908 | if (!opp) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 909 | return NULL; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 910 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 911 | /* Put the supplies at the end of the OPP structure as an empty array */ |
| 912 | opp->supplies = (struct dev_pm_opp_supply *)(opp + 1); |
| 913 | INIT_LIST_HEAD(&opp->node); |
| 914 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 915 | return opp; |
| 916 | } |
| 917 | |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 918 | static bool _opp_supported_by_regulators(struct dev_pm_opp *opp, |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 919 | struct opp_table *opp_table) |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 920 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 921 | struct regulator *reg; |
| 922 | int i; |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 923 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 924 | for (i = 0; i < opp_table->regulator_count; i++) { |
| 925 | reg = opp_table->regulators[i]; |
| 926 | |
| 927 | if (!regulator_is_supported_voltage(reg, |
| 928 | opp->supplies[i].u_volt_min, |
| 929 | opp->supplies[i].u_volt_max)) { |
| 930 | pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n", |
| 931 | __func__, opp->supplies[i].u_volt_min, |
| 932 | opp->supplies[i].u_volt_max); |
| 933 | return false; |
| 934 | } |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | return true; |
| 938 | } |
| 939 | |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 940 | /* |
| 941 | * Returns: |
| 942 | * 0: On success. And appropriate error message for duplicate OPPs. |
| 943 | * -EBUSY: For OPP with same freq/volt and is available. The callers of |
| 944 | * _opp_add() must return 0 if they receive -EBUSY from it. This is to make |
| 945 | * sure we don't print error messages unnecessarily if different parts of |
| 946 | * kernel try to initialize the OPP table. |
| 947 | * -EEXIST: For OPP with same freq but different volt or is unavailable. This |
| 948 | * should be considered an error by the callers of _opp_add(). |
| 949 | */ |
Viresh Kumar | f47b72a | 2016-05-05 16:20:33 +0530 | [diff] [blame] | 950 | int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, |
| 951 | struct opp_table *opp_table) |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 952 | { |
| 953 | struct dev_pm_opp *opp; |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 954 | struct list_head *head; |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 955 | int ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 956 | |
| 957 | /* |
| 958 | * Insert new OPP in order of increasing frequency and discard if |
| 959 | * already present. |
| 960 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 961 | * Need to use &opp_table->opp_list in the condition part of the 'for' |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 962 | * loop, don't replace it with head otherwise it will become an infinite |
| 963 | * loop. |
| 964 | */ |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 965 | mutex_lock(&opp_table->lock); |
| 966 | head = &opp_table->opp_list; |
| 967 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 968 | list_for_each_entry(opp, &opp_table->opp_list, node) { |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 969 | if (new_opp->rate > opp->rate) { |
| 970 | head = &opp->node; |
| 971 | continue; |
| 972 | } |
| 973 | |
| 974 | if (new_opp->rate < opp->rate) |
| 975 | break; |
| 976 | |
| 977 | /* Duplicate OPPs */ |
Viresh Kumar | 0644165 | 2015-07-29 16:23:04 +0530 | [diff] [blame] | 978 | dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n", |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 979 | __func__, opp->rate, opp->supplies[0].u_volt, |
| 980 | opp->available, new_opp->rate, |
| 981 | new_opp->supplies[0].u_volt, new_opp->available); |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 982 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 983 | /* Should we compare voltages for all regulators here ? */ |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 984 | ret = opp->available && |
| 985 | new_opp->supplies[0].u_volt == opp->supplies[0].u_volt ? -EBUSY : -EEXIST; |
| 986 | |
| 987 | mutex_unlock(&opp_table->lock); |
| 988 | return ret; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 989 | } |
| 990 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 991 | list_add(&new_opp->node, head); |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 992 | mutex_unlock(&opp_table->lock); |
| 993 | |
| 994 | new_opp->opp_table = opp_table; |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 995 | kref_init(&new_opp->kref); |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 996 | |
Viresh Kumar | 31641cd | 2017-01-23 10:11:44 +0530 | [diff] [blame] | 997 | /* Get a reference to the OPP table */ |
| 998 | _get_opp_table_kref(opp_table); |
| 999 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1000 | ret = opp_debug_create_one(new_opp, opp_table); |
Viresh Kumar | deaa514 | 2015-11-11 07:59:01 +0530 | [diff] [blame] | 1001 | if (ret) |
| 1002 | dev_err(dev, "%s: Failed to register opp to debugfs (%d)\n", |
| 1003 | __func__, ret); |
| 1004 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1005 | if (!_opp_supported_by_regulators(new_opp, opp_table)) { |
Viresh Kumar | 7d34d56 | 2016-02-09 10:30:34 +0530 | [diff] [blame] | 1006 | new_opp->available = false; |
| 1007 | dev_warn(dev, "%s: OPP not supported by regulators (%lu)\n", |
| 1008 | __func__, new_opp->rate); |
| 1009 | } |
| 1010 | |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1011 | return 0; |
| 1012 | } |
| 1013 | |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1014 | /** |
Viresh Kumar | b64b9c3f | 2015-10-15 21:42:44 +0530 | [diff] [blame] | 1015 | * _opp_add_v1() - Allocate a OPP based on v1 bindings. |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1016 | * @opp_table: OPP table |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1017 | * @dev: device for which we do this operation |
| 1018 | * @freq: Frequency in Hz for this OPP |
| 1019 | * @u_volt: Voltage in uVolts for this OPP |
| 1020 | * @dynamic: Dynamically added OPPs. |
| 1021 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1022 | * This function adds an opp definition to the opp table and returns status. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1023 | * The opp is made available by default and it can be controlled using |
| 1024 | * dev_pm_opp_enable/disable functions and may be removed by dev_pm_opp_remove. |
| 1025 | * |
Viresh Kumar | 8f8d37b | 2015-09-04 13:47:24 +0530 | [diff] [blame] | 1026 | * NOTE: "dynamic" parameter impacts OPPs added by the dev_pm_opp_of_add_table |
| 1027 | * and freed by dev_pm_opp_of_remove_table. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1028 | * |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1029 | * Return: |
| 1030 | * 0 On success OR |
| 1031 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 1032 | * -EEXIST Freq are same and volt are different OR |
| 1033 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
| 1034 | * -ENOMEM Memory allocation failure |
| 1035 | */ |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1036 | int _opp_add_v1(struct opp_table *opp_table, struct device *dev, |
| 1037 | unsigned long freq, long u_volt, bool dynamic) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1038 | { |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1039 | struct dev_pm_opp *new_opp; |
Viresh Kumar | 50f8cfb | 2016-02-09 10:30:37 +0530 | [diff] [blame] | 1040 | unsigned long tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1041 | int ret; |
| 1042 | |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1043 | new_opp = _opp_allocate(opp_table); |
| 1044 | if (!new_opp) |
| 1045 | return -ENOMEM; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1046 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1047 | /* populate the opp table */ |
| 1048 | new_opp->rate = freq; |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1049 | tol = u_volt * opp_table->voltage_tolerance_v1 / 100; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1050 | new_opp->supplies[0].u_volt = u_volt; |
| 1051 | new_opp->supplies[0].u_volt_min = u_volt - tol; |
| 1052 | new_opp->supplies[0].u_volt_max = u_volt + tol; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1053 | new_opp->available = true; |
Viresh Kumar | aa5f2f8 | 2015-07-29 16:23:00 +0530 | [diff] [blame] | 1054 | new_opp->dynamic = dynamic; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1055 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1056 | ret = _opp_add(dev, new_opp, opp_table); |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1057 | if (ret) { |
| 1058 | /* Don't return error for duplicate OPPs */ |
| 1059 | if (ret == -EBUSY) |
| 1060 | ret = 0; |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1061 | goto free_opp; |
Viresh Kumar | 7f8538e | 2017-01-02 14:40:55 +0530 | [diff] [blame] | 1062 | } |
Viresh Kumar | 23dacf6 | 2015-07-29 16:23:01 +0530 | [diff] [blame] | 1063 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1064 | /* |
| 1065 | * Notify the changes in the availability of the operable |
| 1066 | * frequency/voltage list. |
| 1067 | */ |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1068 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ADD, new_opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1069 | return 0; |
| 1070 | |
| 1071 | free_opp: |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1072 | _opp_free(new_opp); |
| 1073 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1074 | return ret; |
| 1075 | } |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 1076 | |
Viresh Kumar | 2746590 | 2015-07-29 16:23:02 +0530 | [diff] [blame] | 1077 | /** |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1078 | * dev_pm_opp_set_supported_hw() - Set supported platforms |
| 1079 | * @dev: Device for which supported-hw has to be set. |
| 1080 | * @versions: Array of hierarchy of versions to match. |
| 1081 | * @count: Number of elements in the array. |
| 1082 | * |
| 1083 | * This is required only for the V2 bindings, and it enables a platform to |
| 1084 | * specify the hierarchy of versions it supports. OPP layer will then enable |
| 1085 | * OPPs, which are available for those versions, based on its 'opp-supported-hw' |
| 1086 | * property. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1087 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1088 | struct opp_table *dev_pm_opp_set_supported_hw(struct device *dev, |
| 1089 | const u32 *versions, unsigned int count) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1090 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1091 | struct opp_table *opp_table; |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1092 | int ret; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1093 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1094 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1095 | if (!opp_table) |
| 1096 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1097 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1098 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1099 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1100 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1101 | /* Do we already have a version hierarchy associated with opp_table? */ |
| 1102 | if (opp_table->supported_hw) { |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1103 | dev_err(dev, "%s: Already have supported hardware list\n", |
| 1104 | __func__); |
| 1105 | ret = -EBUSY; |
| 1106 | goto err; |
| 1107 | } |
| 1108 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1109 | opp_table->supported_hw = kmemdup(versions, count * sizeof(*versions), |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1110 | GFP_KERNEL); |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1111 | if (!opp_table->supported_hw) { |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1112 | ret = -ENOMEM; |
| 1113 | goto err; |
| 1114 | } |
| 1115 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1116 | opp_table->supported_hw_count = count; |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1117 | |
| 1118 | return opp_table; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1119 | |
| 1120 | err: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1121 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1122 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1123 | return ERR_PTR(ret); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1124 | } |
| 1125 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_supported_hw); |
| 1126 | |
| 1127 | /** |
| 1128 | * dev_pm_opp_put_supported_hw() - Releases resources blocked for supported hw |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1129 | * @opp_table: OPP table returned by dev_pm_opp_set_supported_hw(). |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1130 | * |
| 1131 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1132 | * dev_pm_opp_set_supported_hw(). Until this is called, the opp_table structure |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1133 | * will not be freed. |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1134 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1135 | void dev_pm_opp_put_supported_hw(struct opp_table *opp_table) |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1136 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1137 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1138 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1139 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1140 | if (!opp_table->supported_hw) { |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1141 | pr_err("%s: Doesn't have supported hardware list\n", |
| 1142 | __func__); |
| 1143 | return; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1144 | } |
| 1145 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1146 | kfree(opp_table->supported_hw); |
| 1147 | opp_table->supported_hw = NULL; |
| 1148 | opp_table->supported_hw_count = 0; |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1149 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1150 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 7de36b0 | 2015-12-09 08:01:46 +0530 | [diff] [blame] | 1151 | } |
| 1152 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_supported_hw); |
| 1153 | |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1154 | /** |
| 1155 | * dev_pm_opp_set_prop_name() - Set prop-extn name |
Viresh Kumar | a5da644 | 2016-02-16 14:17:52 +0530 | [diff] [blame] | 1156 | * @dev: Device for which the prop-name has to be set. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1157 | * @name: name to postfix to properties. |
| 1158 | * |
| 1159 | * This is required only for the V2 bindings, and it enables a platform to |
| 1160 | * specify the extn to be used for certain property names. The properties to |
| 1161 | * which the extension will apply are opp-microvolt and opp-microamp. OPP core |
| 1162 | * should postfix the property name with -<name> while looking for them. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1163 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1164 | struct opp_table *dev_pm_opp_set_prop_name(struct device *dev, const char *name) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1165 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1166 | struct opp_table *opp_table; |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1167 | int ret; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1168 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1169 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1170 | if (!opp_table) |
| 1171 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1172 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1173 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1174 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1175 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1176 | /* Do we already have a prop-name associated with opp_table? */ |
| 1177 | if (opp_table->prop_name) { |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1178 | dev_err(dev, "%s: Already have prop-name %s\n", __func__, |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1179 | opp_table->prop_name); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1180 | ret = -EBUSY; |
| 1181 | goto err; |
| 1182 | } |
| 1183 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1184 | opp_table->prop_name = kstrdup(name, GFP_KERNEL); |
| 1185 | if (!opp_table->prop_name) { |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1186 | ret = -ENOMEM; |
| 1187 | goto err; |
| 1188 | } |
| 1189 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1190 | return opp_table; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1191 | |
| 1192 | err: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1193 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1194 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1195 | return ERR_PTR(ret); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1196 | } |
| 1197 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_prop_name); |
| 1198 | |
| 1199 | /** |
| 1200 | * dev_pm_opp_put_prop_name() - Releases resources blocked for prop-name |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1201 | * @opp_table: OPP table returned by dev_pm_opp_set_prop_name(). |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1202 | * |
| 1203 | * This is required only for the V2 bindings, and is called for a matching |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1204 | * dev_pm_opp_set_prop_name(). Until this is called, the opp_table structure |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1205 | * will not be freed. |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1206 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1207 | void dev_pm_opp_put_prop_name(struct opp_table *opp_table) |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1208 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1209 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1210 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1211 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1212 | if (!opp_table->prop_name) { |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1213 | pr_err("%s: Doesn't have a prop-name\n", __func__); |
| 1214 | return; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1215 | } |
| 1216 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1217 | kfree(opp_table->prop_name); |
| 1218 | opp_table->prop_name = NULL; |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1219 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1220 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 01fb4d3 | 2015-12-09 08:01:47 +0530 | [diff] [blame] | 1221 | } |
| 1222 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_prop_name); |
| 1223 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1224 | static int _allocate_set_opp_data(struct opp_table *opp_table) |
| 1225 | { |
| 1226 | struct dev_pm_set_opp_data *data; |
| 1227 | int len, count = opp_table->regulator_count; |
| 1228 | |
| 1229 | if (WARN_ON(!count)) |
| 1230 | return -EINVAL; |
| 1231 | |
| 1232 | /* space for set_opp_data */ |
| 1233 | len = sizeof(*data); |
| 1234 | |
| 1235 | /* space for old_opp.supplies and new_opp.supplies */ |
| 1236 | len += 2 * sizeof(struct dev_pm_opp_supply) * count; |
| 1237 | |
| 1238 | data = kzalloc(len, GFP_KERNEL); |
| 1239 | if (!data) |
| 1240 | return -ENOMEM; |
| 1241 | |
| 1242 | data->old_opp.supplies = (void *)(data + 1); |
| 1243 | data->new_opp.supplies = data->old_opp.supplies + count; |
| 1244 | |
| 1245 | opp_table->set_opp_data = data; |
| 1246 | |
| 1247 | return 0; |
| 1248 | } |
| 1249 | |
| 1250 | static void _free_set_opp_data(struct opp_table *opp_table) |
| 1251 | { |
| 1252 | kfree(opp_table->set_opp_data); |
| 1253 | opp_table->set_opp_data = NULL; |
| 1254 | } |
| 1255 | |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1256 | /** |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1257 | * dev_pm_opp_set_regulators() - Set regulator names for the device |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1258 | * @dev: Device for which regulator name is being set. |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1259 | * @names: Array of pointers to the names of the regulator. |
| 1260 | * @count: Number of regulators. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1261 | * |
| 1262 | * In order to support OPP switching, OPP layer needs to know the name of the |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1263 | * device's regulators, as the core would be required to switch voltages as |
| 1264 | * well. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1265 | * |
| 1266 | * This must be called before any OPPs are initialized for the device. |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1267 | */ |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1268 | struct opp_table *dev_pm_opp_set_regulators(struct device *dev, |
| 1269 | const char * const names[], |
| 1270 | unsigned int count) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1271 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1272 | struct opp_table *opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1273 | struct regulator *reg; |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1274 | int ret, i; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1275 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1276 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1277 | if (!opp_table) |
| 1278 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1279 | |
| 1280 | /* This should be called before OPPs are initialized */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1281 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1282 | ret = -EBUSY; |
| 1283 | goto err; |
| 1284 | } |
| 1285 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1286 | /* Already have regulators set */ |
Viresh Kumar | e231f8d | 2016-12-01 16:28:22 +0530 | [diff] [blame] | 1287 | if (opp_table->regulators) { |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1288 | ret = -EBUSY; |
| 1289 | goto err; |
| 1290 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1291 | |
| 1292 | opp_table->regulators = kmalloc_array(count, |
| 1293 | sizeof(*opp_table->regulators), |
| 1294 | GFP_KERNEL); |
| 1295 | if (!opp_table->regulators) { |
| 1296 | ret = -ENOMEM; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1297 | goto err; |
| 1298 | } |
| 1299 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1300 | for (i = 0; i < count; i++) { |
| 1301 | reg = regulator_get_optional(dev, names[i]); |
| 1302 | if (IS_ERR(reg)) { |
| 1303 | ret = PTR_ERR(reg); |
| 1304 | if (ret != -EPROBE_DEFER) |
| 1305 | dev_err(dev, "%s: no regulator (%s) found: %d\n", |
| 1306 | __func__, names[i], ret); |
| 1307 | goto free_regulators; |
| 1308 | } |
| 1309 | |
| 1310 | opp_table->regulators[i] = reg; |
| 1311 | } |
| 1312 | |
| 1313 | opp_table->regulator_count = count; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1314 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1315 | /* Allocate block only once to pass to set_opp() routines */ |
| 1316 | ret = _allocate_set_opp_data(opp_table); |
| 1317 | if (ret) |
| 1318 | goto free_regulators; |
| 1319 | |
Stephen Boyd | 91291d9 | 2016-11-30 16:21:25 +0530 | [diff] [blame] | 1320 | return opp_table; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1321 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1322 | free_regulators: |
| 1323 | while (i != 0) |
| 1324 | regulator_put(opp_table->regulators[--i]); |
| 1325 | |
| 1326 | kfree(opp_table->regulators); |
| 1327 | opp_table->regulators = NULL; |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1328 | opp_table->regulator_count = 0; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1329 | err: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1330 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1331 | |
Stephen Boyd | 91291d9 | 2016-11-30 16:21:25 +0530 | [diff] [blame] | 1332 | return ERR_PTR(ret); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1333 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1334 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_regulators); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1335 | |
| 1336 | /** |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1337 | * dev_pm_opp_put_regulators() - Releases resources blocked for regulator |
| 1338 | * @opp_table: OPP table returned from dev_pm_opp_set_regulators(). |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1339 | */ |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1340 | void dev_pm_opp_put_regulators(struct opp_table *opp_table) |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1341 | { |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1342 | int i; |
| 1343 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1344 | if (!opp_table->regulators) { |
| 1345 | pr_err("%s: Doesn't have regulators set\n", __func__); |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1346 | return; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1347 | } |
| 1348 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1349 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1350 | WARN_ON(!list_empty(&opp_table->opp_list)); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1351 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1352 | for (i = opp_table->regulator_count - 1; i >= 0; i--) |
| 1353 | regulator_put(opp_table->regulators[i]); |
| 1354 | |
Viresh Kumar | 9473558 | 2016-12-01 16:28:20 +0530 | [diff] [blame] | 1355 | _free_set_opp_data(opp_table); |
| 1356 | |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1357 | kfree(opp_table->regulators); |
| 1358 | opp_table->regulators = NULL; |
| 1359 | opp_table->regulator_count = 0; |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1360 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1361 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1362 | } |
Viresh Kumar | dfbe467 | 2016-12-01 16:28:19 +0530 | [diff] [blame] | 1363 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_regulators); |
Viresh Kumar | 9f8ea96 | 2016-02-09 10:30:33 +0530 | [diff] [blame] | 1364 | |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 1365 | /** |
Viresh Kumar | 829a4e8 | 2017-06-21 10:29:13 +0530 | [diff] [blame] | 1366 | * dev_pm_opp_set_clkname() - Set clk name for the device |
| 1367 | * @dev: Device for which clk name is being set. |
| 1368 | * @name: Clk name. |
| 1369 | * |
| 1370 | * In order to support OPP switching, OPP layer needs to get pointer to the |
| 1371 | * clock for the device. Simple cases work fine without using this routine (i.e. |
| 1372 | * by passing connection-id as NULL), but for a device with multiple clocks |
| 1373 | * available, the OPP core needs to know the exact name of the clk to use. |
| 1374 | * |
| 1375 | * This must be called before any OPPs are initialized for the device. |
| 1376 | */ |
| 1377 | struct opp_table *dev_pm_opp_set_clkname(struct device *dev, const char *name) |
| 1378 | { |
| 1379 | struct opp_table *opp_table; |
| 1380 | int ret; |
| 1381 | |
| 1382 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1383 | if (!opp_table) |
| 1384 | return ERR_PTR(-ENOMEM); |
| 1385 | |
| 1386 | /* This should be called before OPPs are initialized */ |
| 1387 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
| 1388 | ret = -EBUSY; |
| 1389 | goto err; |
| 1390 | } |
| 1391 | |
| 1392 | /* Already have default clk set, free it */ |
| 1393 | if (!IS_ERR(opp_table->clk)) |
| 1394 | clk_put(opp_table->clk); |
| 1395 | |
| 1396 | /* Find clk for the device */ |
| 1397 | opp_table->clk = clk_get(dev, name); |
| 1398 | if (IS_ERR(opp_table->clk)) { |
| 1399 | ret = PTR_ERR(opp_table->clk); |
| 1400 | if (ret != -EPROBE_DEFER) { |
| 1401 | dev_err(dev, "%s: Couldn't find clock: %d\n", __func__, |
| 1402 | ret); |
| 1403 | } |
| 1404 | goto err; |
| 1405 | } |
| 1406 | |
| 1407 | return opp_table; |
| 1408 | |
| 1409 | err: |
| 1410 | dev_pm_opp_put_opp_table(opp_table); |
| 1411 | |
| 1412 | return ERR_PTR(ret); |
| 1413 | } |
| 1414 | EXPORT_SYMBOL_GPL(dev_pm_opp_set_clkname); |
| 1415 | |
| 1416 | /** |
| 1417 | * dev_pm_opp_put_clkname() - Releases resources blocked for clk. |
| 1418 | * @opp_table: OPP table returned from dev_pm_opp_set_clkname(). |
| 1419 | */ |
| 1420 | void dev_pm_opp_put_clkname(struct opp_table *opp_table) |
| 1421 | { |
| 1422 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1423 | WARN_ON(!list_empty(&opp_table->opp_list)); |
| 1424 | |
| 1425 | clk_put(opp_table->clk); |
| 1426 | opp_table->clk = ERR_PTR(-EINVAL); |
| 1427 | |
| 1428 | dev_pm_opp_put_opp_table(opp_table); |
| 1429 | } |
| 1430 | EXPORT_SYMBOL_GPL(dev_pm_opp_put_clkname); |
| 1431 | |
| 1432 | /** |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1433 | * dev_pm_opp_register_set_opp_helper() - Register custom set OPP helper |
| 1434 | * @dev: Device for which the helper is getting registered. |
| 1435 | * @set_opp: Custom set OPP helper. |
| 1436 | * |
| 1437 | * This is useful to support complex platforms (like platforms with multiple |
| 1438 | * regulators per device), instead of the generic OPP set rate helper. |
| 1439 | * |
| 1440 | * This must be called before any OPPs are initialized for the device. |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1441 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1442 | struct opp_table *dev_pm_opp_register_set_opp_helper(struct device *dev, |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1443 | int (*set_opp)(struct dev_pm_set_opp_data *data)) |
| 1444 | { |
| 1445 | struct opp_table *opp_table; |
| 1446 | int ret; |
| 1447 | |
| 1448 | if (!set_opp) |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1449 | return ERR_PTR(-EINVAL); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1450 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1451 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1452 | if (!opp_table) |
| 1453 | return ERR_PTR(-ENOMEM); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1454 | |
| 1455 | /* This should be called before OPPs are initialized */ |
| 1456 | if (WARN_ON(!list_empty(&opp_table->opp_list))) { |
| 1457 | ret = -EBUSY; |
| 1458 | goto err; |
| 1459 | } |
| 1460 | |
| 1461 | /* Already have custom set_opp helper */ |
| 1462 | if (WARN_ON(opp_table->set_opp)) { |
| 1463 | ret = -EBUSY; |
| 1464 | goto err; |
| 1465 | } |
| 1466 | |
| 1467 | opp_table->set_opp = set_opp; |
| 1468 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1469 | return opp_table; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1470 | |
| 1471 | err: |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1472 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1473 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1474 | return ERR_PTR(ret); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1475 | } |
| 1476 | EXPORT_SYMBOL_GPL(dev_pm_opp_register_set_opp_helper); |
| 1477 | |
| 1478 | /** |
| 1479 | * dev_pm_opp_register_put_opp_helper() - Releases resources blocked for |
| 1480 | * set_opp helper |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1481 | * @opp_table: OPP table returned from dev_pm_opp_register_set_opp_helper(). |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1482 | * |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1483 | * Release resources blocked for platform specific set_opp helper. |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1484 | */ |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1485 | void dev_pm_opp_register_put_opp_helper(struct opp_table *opp_table) |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1486 | { |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1487 | if (!opp_table->set_opp) { |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1488 | pr_err("%s: Doesn't have custom set_opp helper set\n", |
| 1489 | __func__); |
| 1490 | return; |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1491 | } |
| 1492 | |
| 1493 | /* Make sure there are no concurrent readers while updating opp_table */ |
| 1494 | WARN_ON(!list_empty(&opp_table->opp_list)); |
| 1495 | |
| 1496 | opp_table->set_opp = NULL; |
| 1497 | |
Viresh Kumar | fa30184 | 2017-01-23 10:11:43 +0530 | [diff] [blame] | 1498 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 4dab160 | 2016-12-01 16:28:21 +0530 | [diff] [blame] | 1499 | } |
| 1500 | EXPORT_SYMBOL_GPL(dev_pm_opp_register_put_opp_helper); |
| 1501 | |
| 1502 | /** |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1503 | * dev_pm_opp_add() - Add an OPP table from a table definitions |
| 1504 | * @dev: device for which we do this operation |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 1505 | * @freq: Frequency in Hz for this OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1506 | * @u_volt: Voltage in uVolts for this OPP |
| 1507 | * |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1508 | * This function adds an opp definition to the opp table and returns status. |
Nishanth Menon | 47d43ba | 2013-09-19 16:03:51 -0500 | [diff] [blame] | 1509 | * The opp is made available by default and it can be controlled using |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1510 | * dev_pm_opp_enable/disable functions. |
| 1511 | * |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 1512 | * Return: |
| 1513 | * 0 On success OR |
| 1514 | * Duplicate OPPs (both freq and volt are same) and opp->available |
| 1515 | * -EEXIST Freq are same and volt are different OR |
| 1516 | * Duplicate OPPs (both freq and volt are same) and !opp->available |
Viresh Kumar | 38393409 | 2014-11-25 16:04:18 +0530 | [diff] [blame] | 1517 | * -ENOMEM Memory allocation failure |
Viresh Kumar | a7470db | 2014-11-25 16:04:17 +0530 | [diff] [blame] | 1518 | */ |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1519 | int dev_pm_opp_add(struct device *dev, unsigned long freq, unsigned long u_volt) |
| 1520 | { |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1521 | struct opp_table *opp_table; |
| 1522 | int ret; |
| 1523 | |
Viresh Kumar | b83c189 | 2017-01-23 10:11:45 +0530 | [diff] [blame] | 1524 | opp_table = dev_pm_opp_get_opp_table(dev); |
| 1525 | if (!opp_table) |
| 1526 | return -ENOMEM; |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1527 | |
| 1528 | ret = _opp_add_v1(opp_table, dev, freq, u_volt, true); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1529 | |
Viresh Kumar | b83c189 | 2017-01-23 10:11:45 +0530 | [diff] [blame] | 1530 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1531 | return ret; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1532 | } |
| 1533 | EXPORT_SYMBOL_GPL(dev_pm_opp_add); |
| 1534 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1535 | /** |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 1536 | * _opp_set_availability() - helper to set the availability of an opp |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1537 | * @dev: device for which we do this operation |
| 1538 | * @freq: OPP frequency to modify availability |
| 1539 | * @availability_req: availability status requested for this opp |
| 1540 | * |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1541 | * Set the availability of an OPP, opp_{enable,disable} share a common logic |
| 1542 | * which is isolated here. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1543 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1544 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 1545 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1546 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1547 | */ |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 1548 | static int _opp_set_availability(struct device *dev, unsigned long freq, |
| 1549 | bool availability_req) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1550 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1551 | struct opp_table *opp_table; |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 1552 | struct dev_pm_opp *tmp_opp, *opp = ERR_PTR(-ENODEV); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1553 | int r = 0; |
| 1554 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1555 | /* Find the opp_table */ |
| 1556 | opp_table = _find_opp_table(dev); |
| 1557 | if (IS_ERR(opp_table)) { |
| 1558 | r = PTR_ERR(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1559 | dev_warn(dev, "%s: Device OPP not found (%d)\n", __func__, r); |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 1560 | return r; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1561 | } |
| 1562 | |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1563 | mutex_lock(&opp_table->lock); |
| 1564 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1565 | /* Do we have the frequency? */ |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1566 | list_for_each_entry(tmp_opp, &opp_table->opp_list, node) { |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1567 | if (tmp_opp->rate == freq) { |
| 1568 | opp = tmp_opp; |
| 1569 | break; |
| 1570 | } |
| 1571 | } |
Viresh Kumar | 37a73ec | 2017-01-23 10:11:41 +0530 | [diff] [blame] | 1572 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1573 | if (IS_ERR(opp)) { |
| 1574 | r = PTR_ERR(opp); |
| 1575 | goto unlock; |
| 1576 | } |
| 1577 | |
| 1578 | /* Is update really needed? */ |
| 1579 | if (opp->available == availability_req) |
| 1580 | goto unlock; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1581 | |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 1582 | opp->available = availability_req; |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1583 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 1584 | dev_pm_opp_get(opp); |
| 1585 | mutex_unlock(&opp_table->lock); |
| 1586 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1587 | /* Notify the change of the OPP availability */ |
| 1588 | if (availability_req) |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1589 | blocking_notifier_call_chain(&opp_table->head, OPP_EVENT_ENABLE, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 1590 | opp); |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1591 | else |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1592 | blocking_notifier_call_chain(&opp_table->head, |
Viresh Kumar | a7f3987 | 2017-01-23 10:11:50 +0530 | [diff] [blame] | 1593 | OPP_EVENT_DISABLE, opp); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1594 | |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 1595 | dev_pm_opp_put(opp); |
| 1596 | goto put_table; |
| 1597 | |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1598 | unlock: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1599 | mutex_unlock(&opp_table->lock); |
Viresh Kumar | e4d8ae0 | 2017-09-21 10:44:36 -0700 | [diff] [blame] | 1600 | put_table: |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1601 | dev_pm_opp_put_opp_table(opp_table); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1602 | return r; |
| 1603 | } |
| 1604 | |
| 1605 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1606 | * dev_pm_opp_enable() - Enable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1607 | * @dev: device for which we do this operation |
| 1608 | * @freq: OPP frequency to enable |
| 1609 | * |
| 1610 | * Enables a provided opp. If the operation is valid, this returns 0, else the |
| 1611 | * corresponding error value. It is meant to be used for users an OPP available |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1612 | * after being temporarily made unavailable with dev_pm_opp_disable. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1613 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1614 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 1615 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1616 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1617 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1618 | int dev_pm_opp_enable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1619 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 1620 | return _opp_set_availability(dev, freq, true); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1621 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1622 | EXPORT_SYMBOL_GPL(dev_pm_opp_enable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1623 | |
| 1624 | /** |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1625 | * dev_pm_opp_disable() - Disable a specific OPP |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1626 | * @dev: device for which we do this operation |
| 1627 | * @freq: OPP frequency to disable |
| 1628 | * |
| 1629 | * Disables a provided opp. If the operation is valid, this returns |
| 1630 | * 0, else the corresponding error value. It is meant to be a temporary |
| 1631 | * control by users to make this OPP not available until the circumstances are |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1632 | * right to make it available again (with a call to dev_pm_opp_enable). |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1633 | * |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1634 | * Return: -EINVAL for bad pointers, -ENOMEM if no memory available for the |
Stephen Boyd | e1a2d49 | 2015-09-24 12:28:44 -0700 | [diff] [blame] | 1635 | * copy operation, returns 0 if no modification was done OR modification was |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1636 | * successful. |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1637 | */ |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1638 | int dev_pm_opp_disable(struct device *dev, unsigned long freq) |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1639 | { |
Nishanth Menon | 327854c | 2014-12-24 11:22:56 -0600 | [diff] [blame] | 1640 | return _opp_set_availability(dev, freq, false); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1641 | } |
Nishanth Menon | 5d4879c | 2013-09-19 16:03:50 -0500 | [diff] [blame] | 1642 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
Nishanth Menon | e1f60b2 | 2010-10-13 00:13:10 +0200 | [diff] [blame] | 1643 | |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1644 | /** |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1645 | * dev_pm_opp_register_notifier() - Register OPP notifier for the device |
| 1646 | * @dev: Device for which notifier needs to be registered |
| 1647 | * @nb: Notifier block to be registered |
Nishanth Menon | 984f16c | 2014-12-24 11:22:57 -0600 | [diff] [blame] | 1648 | * |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1649 | * Return: 0 on success or a negative error value. |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1650 | */ |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1651 | int dev_pm_opp_register_notifier(struct device *dev, struct notifier_block *nb) |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1652 | { |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1653 | struct opp_table *opp_table; |
| 1654 | int ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1655 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1656 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1657 | if (IS_ERR(opp_table)) |
| 1658 | return PTR_ERR(opp_table); |
| 1659 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1660 | ret = blocking_notifier_chain_register(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1661 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1662 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1663 | |
| 1664 | return ret; |
MyungJoo Ham | 03ca370 | 2011-09-30 22:35:12 +0200 | [diff] [blame] | 1665 | } |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1666 | EXPORT_SYMBOL(dev_pm_opp_register_notifier); |
| 1667 | |
| 1668 | /** |
| 1669 | * dev_pm_opp_unregister_notifier() - Unregister OPP notifier for the device |
| 1670 | * @dev: Device for which notifier needs to be unregistered |
| 1671 | * @nb: Notifier block to be unregistered |
| 1672 | * |
| 1673 | * Return: 0 on success or a negative error value. |
| 1674 | */ |
| 1675 | int dev_pm_opp_unregister_notifier(struct device *dev, |
| 1676 | struct notifier_block *nb) |
| 1677 | { |
| 1678 | struct opp_table *opp_table; |
| 1679 | int ret; |
| 1680 | |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1681 | opp_table = _find_opp_table(dev); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1682 | if (IS_ERR(opp_table)) |
| 1683 | return PTR_ERR(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1684 | |
Viresh Kumar | 052c6f1 | 2017-01-23 10:11:49 +0530 | [diff] [blame] | 1685 | ret = blocking_notifier_chain_unregister(&opp_table->head, nb); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1686 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1687 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | dc2c9ad | 2017-01-02 14:41:03 +0530 | [diff] [blame] | 1688 | |
| 1689 | return ret; |
| 1690 | } |
| 1691 | EXPORT_SYMBOL(dev_pm_opp_unregister_notifier); |
Shawn Guo | b496dfb | 2012-09-05 01:09:12 +0200 | [diff] [blame] | 1692 | |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 1693 | /* |
| 1694 | * Free OPPs either created using static entries present in DT or even the |
| 1695 | * dynamically added entries based on remove_all param. |
Shawn Guo | b496dfb | 2012-09-05 01:09:12 +0200 | [diff] [blame] | 1696 | */ |
Viresh Kumar | 8cd2f6e | 2017-01-02 14:41:01 +0530 | [diff] [blame] | 1697 | void _dev_pm_opp_remove_table(struct opp_table *opp_table, struct device *dev, |
| 1698 | bool remove_all) |
Viresh Kumar | 9274c89 | 2017-01-02 14:41:00 +0530 | [diff] [blame] | 1699 | { |
| 1700 | struct dev_pm_opp *opp, *tmp; |
| 1701 | |
Viresh Kumar | 9274c89 | 2017-01-02 14:41:00 +0530 | [diff] [blame] | 1702 | /* Find if opp_table manages a single device */ |
| 1703 | if (list_is_singular(&opp_table->dev_list)) { |
| 1704 | /* Free static OPPs */ |
| 1705 | list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) { |
| 1706 | if (remove_all || !opp->dynamic) |
Viresh Kumar | 7034764 | 2017-01-23 10:11:46 +0530 | [diff] [blame] | 1707 | dev_pm_opp_put(opp); |
Viresh Kumar | 9274c89 | 2017-01-02 14:41:00 +0530 | [diff] [blame] | 1708 | } |
| 1709 | } else { |
| 1710 | _remove_opp_dev(_find_opp_dev(dev, opp_table), opp_table); |
| 1711 | } |
| 1712 | } |
| 1713 | |
| 1714 | void _dev_pm_opp_find_and_remove_table(struct device *dev, bool remove_all) |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1715 | { |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1716 | struct opp_table *opp_table; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1717 | |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1718 | /* Check for existing table for 'dev' */ |
| 1719 | opp_table = _find_opp_table(dev); |
| 1720 | if (IS_ERR(opp_table)) { |
| 1721 | int error = PTR_ERR(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1722 | |
| 1723 | if (error != -ENODEV) |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1724 | WARN(1, "%s: opp_table: %d\n", |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1725 | IS_ERR_OR_NULL(dev) ? |
| 1726 | "Invalid device" : dev_name(dev), |
| 1727 | error); |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1728 | return; |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1729 | } |
| 1730 | |
Viresh Kumar | 9274c89 | 2017-01-02 14:41:00 +0530 | [diff] [blame] | 1731 | _dev_pm_opp_remove_table(opp_table, dev, remove_all); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1732 | |
Viresh Kumar | 5b650b3 | 2017-01-23 10:11:48 +0530 | [diff] [blame] | 1733 | dev_pm_opp_put_opp_table(opp_table); |
Viresh Kumar | 737002b | 2015-07-29 16:22:58 +0530 | [diff] [blame] | 1734 | } |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1735 | |
| 1736 | /** |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 1737 | * dev_pm_opp_remove_table() - Free all OPPs associated with the device |
Viresh Kumar | 2c2709d | 2016-02-16 14:17:53 +0530 | [diff] [blame] | 1738 | * @dev: device pointer used to lookup OPP table. |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1739 | * |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 1740 | * Free both OPPs created using static entries present in DT and the |
| 1741 | * dynamically added entries. |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1742 | */ |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 1743 | void dev_pm_opp_remove_table(struct device *dev) |
Viresh Kumar | 129eec5 | 2014-11-27 08:54:06 +0530 | [diff] [blame] | 1744 | { |
Viresh Kumar | 9274c89 | 2017-01-02 14:41:00 +0530 | [diff] [blame] | 1745 | _dev_pm_opp_find_and_remove_table(dev, true); |
Viresh Kumar | 8d4d4e9 | 2015-06-12 17:10:38 +0530 | [diff] [blame] | 1746 | } |
Sudeep Holla | 411466c | 2016-05-03 15:05:04 +0100 | [diff] [blame] | 1747 | EXPORT_SYMBOL_GPL(dev_pm_opp_remove_table); |