Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Intersil ISL1208 rtc class driver |
| 3 | * |
| 4 | * Copyright 2005,2006 Hebert Valerio Riedel <hvr@gnu.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify it |
| 7 | * under the terms of the GNU General Public License as published by the |
| 8 | * Free Software Foundation; either version 2 of the License, or (at your |
| 9 | * option) any later version. |
| 10 | * |
| 11 | */ |
| 12 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 13 | #include <linux/bcd.h> |
Alexandre Belloni | 4b3a6a3 | 2018-09-19 03:13:22 +0200 | [diff] [blame] | 14 | #include <linux/i2c.h> |
| 15 | #include <linux/module.h> |
Denis Osterland | 9ece7cd | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 16 | #include <linux/of_irq.h> |
Alexandre Belloni | 4b3a6a3 | 2018-09-19 03:13:22 +0200 | [diff] [blame] | 17 | #include <linux/rtc.h> |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 18 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 19 | /* Register map */ |
| 20 | /* rtc section */ |
| 21 | #define ISL1208_REG_SC 0x00 |
| 22 | #define ISL1208_REG_MN 0x01 |
| 23 | #define ISL1208_REG_HR 0x02 |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 24 | #define ISL1208_REG_HR_MIL (1<<7) /* 24h/12h mode */ |
| 25 | #define ISL1208_REG_HR_PM (1<<5) /* PM/AM bit in 12h mode */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 26 | #define ISL1208_REG_DT 0x03 |
| 27 | #define ISL1208_REG_MO 0x04 |
| 28 | #define ISL1208_REG_YR 0x05 |
| 29 | #define ISL1208_REG_DW 0x06 |
| 30 | #define ISL1208_RTC_SECTION_LEN 7 |
| 31 | |
| 32 | /* control/status section */ |
| 33 | #define ISL1208_REG_SR 0x07 |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 34 | #define ISL1208_REG_SR_ARST (1<<7) /* auto reset */ |
| 35 | #define ISL1208_REG_SR_XTOSCB (1<<6) /* crystal oscillator */ |
| 36 | #define ISL1208_REG_SR_WRTC (1<<4) /* write rtc */ |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 37 | #define ISL1208_REG_SR_EVT (1<<3) /* event */ |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 38 | #define ISL1208_REG_SR_ALM (1<<2) /* alarm */ |
| 39 | #define ISL1208_REG_SR_BAT (1<<1) /* battery */ |
| 40 | #define ISL1208_REG_SR_RTCF (1<<0) /* rtc fail */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 41 | #define ISL1208_REG_INT 0x08 |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 42 | #define ISL1208_REG_INT_ALME (1<<6) /* alarm enable */ |
| 43 | #define ISL1208_REG_INT_IM (1<<7) /* interrupt/alarm mode */ |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 44 | #define ISL1219_REG_EV 0x09 |
| 45 | #define ISL1219_REG_EV_EVEN (1<<4) /* event detection enable */ |
Denis Osterland | cfa3062 | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 46 | #define ISL1219_REG_EV_EVIENB (1<<7) /* event in pull-up disable */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 47 | #define ISL1208_REG_ATR 0x0a |
| 48 | #define ISL1208_REG_DTR 0x0b |
| 49 | |
| 50 | /* alarm section */ |
| 51 | #define ISL1208_REG_SCA 0x0c |
| 52 | #define ISL1208_REG_MNA 0x0d |
| 53 | #define ISL1208_REG_HRA 0x0e |
| 54 | #define ISL1208_REG_DTA 0x0f |
| 55 | #define ISL1208_REG_MOA 0x10 |
| 56 | #define ISL1208_REG_DWA 0x11 |
| 57 | #define ISL1208_ALARM_SECTION_LEN 6 |
| 58 | |
| 59 | /* user section */ |
| 60 | #define ISL1208_REG_USR1 0x12 |
| 61 | #define ISL1208_REG_USR2 0x13 |
| 62 | #define ISL1208_USR_SECTION_LEN 2 |
| 63 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 64 | /* event section */ |
| 65 | #define ISL1219_REG_SCT 0x14 |
| 66 | #define ISL1219_REG_MNT 0x15 |
| 67 | #define ISL1219_REG_HRT 0x16 |
| 68 | #define ISL1219_REG_DTT 0x17 |
| 69 | #define ISL1219_REG_MOT 0x18 |
| 70 | #define ISL1219_REG_YRT 0x19 |
| 71 | #define ISL1219_EVT_SECTION_LEN 6 |
| 72 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 73 | static struct i2c_driver isl1208_driver; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 74 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 75 | /* ISL1208 various variants */ |
| 76 | enum { |
| 77 | TYPE_ISL1208 = 0, |
| 78 | TYPE_ISL1218, |
| 79 | TYPE_ISL1219, |
| 80 | }; |
| 81 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 82 | /* block read */ |
| 83 | static int |
| 84 | isl1208_i2c_read_regs(struct i2c_client *client, u8 reg, u8 buf[], |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 85 | unsigned len) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 86 | { |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 87 | int ret; |
| 88 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 89 | WARN_ON(reg > ISL1219_REG_YRT); |
| 90 | WARN_ON(reg + len > ISL1219_REG_YRT + 1); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 91 | |
Trent Piepho | facc23b | 2018-11-15 18:51:18 +0000 | [diff] [blame] | 92 | ret = i2c_smbus_read_i2c_block_data(client, reg, len, buf); |
| 93 | return (ret < 0) ? ret : 0; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 94 | } |
| 95 | |
| 96 | /* block write */ |
| 97 | static int |
| 98 | isl1208_i2c_set_regs(struct i2c_client *client, u8 reg, u8 const buf[], |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 99 | unsigned len) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 100 | { |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 101 | int ret; |
| 102 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 103 | WARN_ON(reg > ISL1219_REG_YRT); |
| 104 | WARN_ON(reg + len > ISL1219_REG_YRT + 1); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 105 | |
Trent Piepho | facc23b | 2018-11-15 18:51:18 +0000 | [diff] [blame] | 106 | ret = i2c_smbus_write_i2c_block_data(client, reg, len, buf); |
| 107 | return (ret < 0) ? ret : 0; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 108 | } |
| 109 | |
Adam Buchbinder | 48fc7f7 | 2012-09-19 21:48:00 -0400 | [diff] [blame] | 110 | /* simple check to see whether we have a isl1208 */ |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 111 | static int |
| 112 | isl1208_i2c_validate_client(struct i2c_client *client) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 113 | { |
| 114 | u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, }; |
| 115 | u8 zero_mask[ISL1208_RTC_SECTION_LEN] = { |
| 116 | 0x80, 0x80, 0x40, 0xc0, 0xe0, 0x00, 0xf8 |
| 117 | }; |
| 118 | int i; |
| 119 | int ret; |
| 120 | |
| 121 | ret = isl1208_i2c_read_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN); |
| 122 | if (ret < 0) |
| 123 | return ret; |
| 124 | |
| 125 | for (i = 0; i < ISL1208_RTC_SECTION_LEN; ++i) { |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 126 | if (regs[i] & zero_mask[i]) /* check if bits are cleared */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 127 | return -ENODEV; |
| 128 | } |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 133 | static int |
| 134 | isl1208_i2c_get_sr(struct i2c_client *client) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 135 | { |
Sachin Kamat | c91fd91 | 2013-11-12 15:10:26 -0800 | [diff] [blame] | 136 | return i2c_smbus_read_byte_data(client, ISL1208_REG_SR); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 137 | } |
| 138 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 139 | static int |
| 140 | isl1208_i2c_get_atr(struct i2c_client *client) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 141 | { |
| 142 | int atr = i2c_smbus_read_byte_data(client, ISL1208_REG_ATR); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 143 | if (atr < 0) |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 144 | return atr; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 145 | |
| 146 | /* The 6bit value in the ATR register controls the load |
| 147 | * capacitance C_load * in steps of 0.25pF |
| 148 | * |
| 149 | * bit (1<<5) of the ATR register is inverted |
| 150 | * |
| 151 | * C_load(ATR=0x20) = 4.50pF |
| 152 | * C_load(ATR=0x00) = 12.50pF |
| 153 | * C_load(ATR=0x1f) = 20.25pF |
| 154 | * |
| 155 | */ |
| 156 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 157 | atr &= 0x3f; /* mask out lsb */ |
| 158 | atr ^= 1 << 5; /* invert 6th bit */ |
| 159 | atr += 2 * 9; /* add offset of 4.5pF; unit[atr] = 0.25pF */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 160 | |
| 161 | return atr; |
| 162 | } |
| 163 | |
Trent Piepho | c8c97a4f | 2019-01-02 16:00:17 +0000 | [diff] [blame^] | 164 | /* returns adjustment value + 100 */ |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 165 | static int |
| 166 | isl1208_i2c_get_dtr(struct i2c_client *client) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 167 | { |
| 168 | int dtr = i2c_smbus_read_byte_data(client, ISL1208_REG_DTR); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 169 | if (dtr < 0) |
| 170 | return -EIO; |
| 171 | |
| 172 | /* dtr encodes adjustments of {-60,-40,-20,0,20,40,60} ppm */ |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 173 | dtr = ((dtr & 0x3) * 20) * (dtr & (1 << 2) ? -1 : 1); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 174 | |
Trent Piepho | c8c97a4f | 2019-01-02 16:00:17 +0000 | [diff] [blame^] | 175 | return dtr + 100; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 176 | } |
| 177 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 178 | static int |
| 179 | isl1208_i2c_get_usr(struct i2c_client *client) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 180 | { |
| 181 | u8 buf[ISL1208_USR_SECTION_LEN] = { 0, }; |
| 182 | int ret; |
| 183 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 184 | ret = isl1208_i2c_read_regs(client, ISL1208_REG_USR1, buf, |
| 185 | ISL1208_USR_SECTION_LEN); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 186 | if (ret < 0) |
| 187 | return ret; |
| 188 | |
| 189 | return (buf[1] << 8) | buf[0]; |
| 190 | } |
| 191 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 192 | static int |
| 193 | isl1208_i2c_set_usr(struct i2c_client *client, u16 usr) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 194 | { |
| 195 | u8 buf[ISL1208_USR_SECTION_LEN]; |
| 196 | |
| 197 | buf[0] = usr & 0xff; |
| 198 | buf[1] = (usr >> 8) & 0xff; |
| 199 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 200 | return isl1208_i2c_set_regs(client, ISL1208_REG_USR1, buf, |
| 201 | ISL1208_USR_SECTION_LEN); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 202 | } |
| 203 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 204 | static int |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 205 | isl1208_rtc_toggle_alarm(struct i2c_client *client, int enable) |
| 206 | { |
| 207 | int icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT); |
| 208 | |
| 209 | if (icr < 0) { |
| 210 | dev_err(&client->dev, "%s: reading INT failed\n", __func__); |
| 211 | return icr; |
| 212 | } |
| 213 | |
| 214 | if (enable) |
| 215 | icr |= ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM; |
| 216 | else |
| 217 | icr &= ~(ISL1208_REG_INT_ALME | ISL1208_REG_INT_IM); |
| 218 | |
| 219 | icr = i2c_smbus_write_byte_data(client, ISL1208_REG_INT, icr); |
| 220 | if (icr < 0) { |
| 221 | dev_err(&client->dev, "%s: writing INT failed\n", __func__); |
| 222 | return icr; |
| 223 | } |
| 224 | |
| 225 | return 0; |
| 226 | } |
| 227 | |
| 228 | static int |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 229 | isl1208_rtc_proc(struct device *dev, struct seq_file *seq) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 230 | { |
| 231 | struct i2c_client *const client = to_i2c_client(dev); |
| 232 | int sr, dtr, atr, usr; |
| 233 | |
| 234 | sr = isl1208_i2c_get_sr(client); |
| 235 | if (sr < 0) { |
| 236 | dev_err(&client->dev, "%s: reading SR failed\n", __func__); |
| 237 | return sr; |
| 238 | } |
| 239 | |
| 240 | seq_printf(seq, "status_reg\t:%s%s%s%s%s%s (0x%.2x)\n", |
| 241 | (sr & ISL1208_REG_SR_RTCF) ? " RTCF" : "", |
| 242 | (sr & ISL1208_REG_SR_BAT) ? " BAT" : "", |
| 243 | (sr & ISL1208_REG_SR_ALM) ? " ALM" : "", |
| 244 | (sr & ISL1208_REG_SR_WRTC) ? " WRTC" : "", |
| 245 | (sr & ISL1208_REG_SR_XTOSCB) ? " XTOSCB" : "", |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 246 | (sr & ISL1208_REG_SR_ARST) ? " ARST" : "", sr); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 247 | |
| 248 | seq_printf(seq, "batt_status\t: %s\n", |
| 249 | (sr & ISL1208_REG_SR_RTCF) ? "bad" : "okay"); |
| 250 | |
| 251 | dtr = isl1208_i2c_get_dtr(client); |
Trent Piepho | c8c97a4f | 2019-01-02 16:00:17 +0000 | [diff] [blame^] | 252 | if (dtr >= 0) |
| 253 | seq_printf(seq, "digital_trim\t: %d ppm\n", dtr - 100); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 254 | |
| 255 | atr = isl1208_i2c_get_atr(client); |
| 256 | if (atr >= 0) |
| 257 | seq_printf(seq, "analog_trim\t: %d.%.2d pF\n", |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 258 | atr >> 2, (atr & 0x3) * 25); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 259 | |
| 260 | usr = isl1208_i2c_get_usr(client); |
| 261 | if (usr >= 0) |
| 262 | seq_printf(seq, "user_data\t: 0x%.4x\n", usr); |
| 263 | |
| 264 | return 0; |
| 265 | } |
| 266 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 267 | static int |
| 268 | isl1208_i2c_read_time(struct i2c_client *client, struct rtc_time *tm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 269 | { |
| 270 | int sr; |
| 271 | u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, }; |
| 272 | |
| 273 | sr = isl1208_i2c_get_sr(client); |
| 274 | if (sr < 0) { |
| 275 | dev_err(&client->dev, "%s: reading SR failed\n", __func__); |
| 276 | return -EIO; |
| 277 | } |
| 278 | |
| 279 | sr = isl1208_i2c_read_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN); |
| 280 | if (sr < 0) { |
| 281 | dev_err(&client->dev, "%s: reading RTC section failed\n", |
| 282 | __func__); |
| 283 | return sr; |
| 284 | } |
| 285 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 286 | tm->tm_sec = bcd2bin(regs[ISL1208_REG_SC]); |
| 287 | tm->tm_min = bcd2bin(regs[ISL1208_REG_MN]); |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 288 | |
| 289 | /* HR field has a more complex interpretation */ |
| 290 | { |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 291 | const u8 _hr = regs[ISL1208_REG_HR]; |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 292 | if (_hr & ISL1208_REG_HR_MIL) /* 24h format */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 293 | tm->tm_hour = bcd2bin(_hr & 0x3f); |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 294 | else { |
| 295 | /* 12h format */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 296 | tm->tm_hour = bcd2bin(_hr & 0x1f); |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 297 | if (_hr & ISL1208_REG_HR_PM) /* PM flag set */ |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 298 | tm->tm_hour += 12; |
| 299 | } |
| 300 | } |
| 301 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 302 | tm->tm_mday = bcd2bin(regs[ISL1208_REG_DT]); |
| 303 | tm->tm_mon = bcd2bin(regs[ISL1208_REG_MO]) - 1; /* rtc starts at 1 */ |
| 304 | tm->tm_year = bcd2bin(regs[ISL1208_REG_YR]) + 100; |
| 305 | tm->tm_wday = bcd2bin(regs[ISL1208_REG_DW]); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 306 | |
| 307 | return 0; |
| 308 | } |
| 309 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 310 | static int |
| 311 | isl1208_i2c_read_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 312 | { |
| 313 | struct rtc_time *const tm = &alarm->time; |
| 314 | u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, }; |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 315 | int icr, yr, sr = isl1208_i2c_get_sr(client); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 316 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 317 | if (sr < 0) { |
| 318 | dev_err(&client->dev, "%s: reading SR failed\n", __func__); |
| 319 | return sr; |
| 320 | } |
| 321 | |
| 322 | sr = isl1208_i2c_read_regs(client, ISL1208_REG_SCA, regs, |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 323 | ISL1208_ALARM_SECTION_LEN); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 324 | if (sr < 0) { |
| 325 | dev_err(&client->dev, "%s: reading alarm section failed\n", |
| 326 | __func__); |
| 327 | return sr; |
| 328 | } |
| 329 | |
| 330 | /* MSB of each alarm register is an enable bit */ |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 331 | tm->tm_sec = bcd2bin(regs[ISL1208_REG_SCA - ISL1208_REG_SCA] & 0x7f); |
| 332 | tm->tm_min = bcd2bin(regs[ISL1208_REG_MNA - ISL1208_REG_SCA] & 0x7f); |
| 333 | tm->tm_hour = bcd2bin(regs[ISL1208_REG_HRA - ISL1208_REG_SCA] & 0x3f); |
| 334 | tm->tm_mday = bcd2bin(regs[ISL1208_REG_DTA - ISL1208_REG_SCA] & 0x3f); |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 335 | tm->tm_mon = |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 336 | bcd2bin(regs[ISL1208_REG_MOA - ISL1208_REG_SCA] & 0x1f) - 1; |
| 337 | tm->tm_wday = bcd2bin(regs[ISL1208_REG_DWA - ISL1208_REG_SCA] & 0x03); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 338 | |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 339 | /* The alarm doesn't store the year so get it from the rtc section */ |
| 340 | yr = i2c_smbus_read_byte_data(client, ISL1208_REG_YR); |
| 341 | if (yr < 0) { |
| 342 | dev_err(&client->dev, "%s: reading RTC YR failed\n", __func__); |
| 343 | return yr; |
| 344 | } |
| 345 | tm->tm_year = bcd2bin(yr) + 100; |
| 346 | |
| 347 | icr = i2c_smbus_read_byte_data(client, ISL1208_REG_INT); |
| 348 | if (icr < 0) { |
| 349 | dev_err(&client->dev, "%s: reading INT failed\n", __func__); |
| 350 | return icr; |
| 351 | } |
| 352 | alarm->enabled = !!(icr & ISL1208_REG_INT_ALME); |
| 353 | |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | static int |
| 358 | isl1208_i2c_set_alarm(struct i2c_client *client, struct rtc_wkalrm *alarm) |
| 359 | { |
| 360 | struct rtc_time *alarm_tm = &alarm->time; |
| 361 | u8 regs[ISL1208_ALARM_SECTION_LEN] = { 0, }; |
| 362 | const int offs = ISL1208_REG_SCA; |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 363 | struct rtc_time rtc_tm; |
| 364 | int err, enable; |
| 365 | |
| 366 | err = isl1208_i2c_read_time(client, &rtc_tm); |
| 367 | if (err) |
| 368 | return err; |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 369 | |
| 370 | /* If the alarm time is before the current time disable the alarm */ |
Xunlei Pang | f118db1 | 2015-06-12 10:04:11 +0800 | [diff] [blame] | 371 | if (!alarm->enabled || rtc_tm_sub(alarm_tm, &rtc_tm) <= 0) |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 372 | enable = 0x00; |
| 373 | else |
| 374 | enable = 0x80; |
| 375 | |
| 376 | /* Program the alarm and enable it for each setting */ |
| 377 | regs[ISL1208_REG_SCA - offs] = bin2bcd(alarm_tm->tm_sec) | enable; |
| 378 | regs[ISL1208_REG_MNA - offs] = bin2bcd(alarm_tm->tm_min) | enable; |
| 379 | regs[ISL1208_REG_HRA - offs] = bin2bcd(alarm_tm->tm_hour) | |
| 380 | ISL1208_REG_HR_MIL | enable; |
| 381 | |
| 382 | regs[ISL1208_REG_DTA - offs] = bin2bcd(alarm_tm->tm_mday) | enable; |
| 383 | regs[ISL1208_REG_MOA - offs] = bin2bcd(alarm_tm->tm_mon + 1) | enable; |
| 384 | regs[ISL1208_REG_DWA - offs] = bin2bcd(alarm_tm->tm_wday & 7) | enable; |
| 385 | |
| 386 | /* write ALARM registers */ |
| 387 | err = isl1208_i2c_set_regs(client, offs, regs, |
| 388 | ISL1208_ALARM_SECTION_LEN); |
| 389 | if (err < 0) { |
| 390 | dev_err(&client->dev, "%s: writing ALARM section failed\n", |
| 391 | __func__); |
| 392 | return err; |
| 393 | } |
| 394 | |
| 395 | err = isl1208_rtc_toggle_alarm(client, enable); |
| 396 | if (err) |
| 397 | return err; |
| 398 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 399 | return 0; |
| 400 | } |
| 401 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 402 | static int |
| 403 | isl1208_rtc_read_time(struct device *dev, struct rtc_time *tm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 404 | { |
| 405 | return isl1208_i2c_read_time(to_i2c_client(dev), tm); |
| 406 | } |
| 407 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 408 | static int |
| 409 | isl1208_i2c_set_time(struct i2c_client *client, struct rtc_time const *tm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 410 | { |
| 411 | int sr; |
| 412 | u8 regs[ISL1208_RTC_SECTION_LEN] = { 0, }; |
| 413 | |
Chris Elston | cc6c2ca | 2008-12-23 13:57:10 -0800 | [diff] [blame] | 414 | /* The clock has an 8 bit wide bcd-coded register (they never learn) |
| 415 | * for the year. tm_year is an offset from 1900 and we are interested |
| 416 | * in the 2000-2099 range, so any value less than 100 is invalid. |
| 417 | */ |
| 418 | if (tm->tm_year < 100) |
| 419 | return -EINVAL; |
| 420 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 421 | regs[ISL1208_REG_SC] = bin2bcd(tm->tm_sec); |
| 422 | regs[ISL1208_REG_MN] = bin2bcd(tm->tm_min); |
| 423 | regs[ISL1208_REG_HR] = bin2bcd(tm->tm_hour) | ISL1208_REG_HR_MIL; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 424 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 425 | regs[ISL1208_REG_DT] = bin2bcd(tm->tm_mday); |
| 426 | regs[ISL1208_REG_MO] = bin2bcd(tm->tm_mon + 1); |
| 427 | regs[ISL1208_REG_YR] = bin2bcd(tm->tm_year - 100); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 428 | |
Adrian Bunk | fe20ba7 | 2008-10-18 20:28:41 -0700 | [diff] [blame] | 429 | regs[ISL1208_REG_DW] = bin2bcd(tm->tm_wday & 7); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 430 | |
| 431 | sr = isl1208_i2c_get_sr(client); |
| 432 | if (sr < 0) { |
| 433 | dev_err(&client->dev, "%s: reading SR failed\n", __func__); |
| 434 | return sr; |
| 435 | } |
| 436 | |
| 437 | /* set WRTC */ |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 438 | sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 439 | sr | ISL1208_REG_SR_WRTC); |
| 440 | if (sr < 0) { |
| 441 | dev_err(&client->dev, "%s: writing SR failed\n", __func__); |
| 442 | return sr; |
| 443 | } |
| 444 | |
| 445 | /* write RTC registers */ |
| 446 | sr = isl1208_i2c_set_regs(client, 0, regs, ISL1208_RTC_SECTION_LEN); |
| 447 | if (sr < 0) { |
| 448 | dev_err(&client->dev, "%s: writing RTC section failed\n", |
| 449 | __func__); |
| 450 | return sr; |
| 451 | } |
| 452 | |
| 453 | /* clear WRTC again */ |
Denis Osterland | 5b9fc795 | 2018-01-23 13:17:58 +0100 | [diff] [blame] | 454 | sr = isl1208_i2c_get_sr(client); |
| 455 | if (sr < 0) { |
| 456 | dev_err(&client->dev, "%s: reading SR failed\n", __func__); |
| 457 | return sr; |
| 458 | } |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 459 | sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 460 | sr & ~ISL1208_REG_SR_WRTC); |
| 461 | if (sr < 0) { |
| 462 | dev_err(&client->dev, "%s: writing SR failed\n", __func__); |
| 463 | return sr; |
| 464 | } |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 470 | static int |
| 471 | isl1208_rtc_set_time(struct device *dev, struct rtc_time *tm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 472 | { |
| 473 | return isl1208_i2c_set_time(to_i2c_client(dev), tm); |
| 474 | } |
| 475 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 476 | static int |
| 477 | isl1208_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 478 | { |
| 479 | return isl1208_i2c_read_alarm(to_i2c_client(dev), alarm); |
| 480 | } |
| 481 | |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 482 | static int |
| 483 | isl1208_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) |
| 484 | { |
| 485 | return isl1208_i2c_set_alarm(to_i2c_client(dev), alarm); |
| 486 | } |
| 487 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 488 | static ssize_t timestamp0_store(struct device *dev, |
| 489 | struct device_attribute *attr, |
| 490 | const char *buf, size_t count) |
| 491 | { |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 492 | struct i2c_client *client = to_i2c_client(dev->parent); |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 493 | int sr; |
| 494 | |
| 495 | sr = isl1208_i2c_get_sr(client); |
| 496 | if (sr < 0) { |
| 497 | dev_err(dev, "%s: reading SR failed\n", __func__); |
| 498 | return sr; |
| 499 | } |
| 500 | |
| 501 | sr &= ~ISL1208_REG_SR_EVT; |
| 502 | |
| 503 | sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr); |
| 504 | if (sr < 0) |
| 505 | dev_err(dev, "%s: writing SR failed\n", |
| 506 | __func__); |
| 507 | |
| 508 | return count; |
| 509 | }; |
| 510 | |
| 511 | static ssize_t timestamp0_show(struct device *dev, |
| 512 | struct device_attribute *attr, char *buf) |
| 513 | { |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 514 | struct i2c_client *client = to_i2c_client(dev->parent); |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 515 | u8 regs[ISL1219_EVT_SECTION_LEN] = { 0, }; |
| 516 | struct rtc_time tm; |
| 517 | int sr; |
| 518 | |
| 519 | sr = isl1208_i2c_get_sr(client); |
| 520 | if (sr < 0) { |
| 521 | dev_err(dev, "%s: reading SR failed\n", __func__); |
| 522 | return sr; |
| 523 | } |
| 524 | |
| 525 | if (!(sr & ISL1208_REG_SR_EVT)) |
| 526 | return 0; |
| 527 | |
| 528 | sr = isl1208_i2c_read_regs(client, ISL1219_REG_SCT, regs, |
| 529 | ISL1219_EVT_SECTION_LEN); |
| 530 | if (sr < 0) { |
| 531 | dev_err(dev, "%s: reading event section failed\n", |
| 532 | __func__); |
| 533 | return 0; |
| 534 | } |
| 535 | |
| 536 | /* MSB of each alarm register is an enable bit */ |
| 537 | tm.tm_sec = bcd2bin(regs[ISL1219_REG_SCT - ISL1219_REG_SCT] & 0x7f); |
| 538 | tm.tm_min = bcd2bin(regs[ISL1219_REG_MNT - ISL1219_REG_SCT] & 0x7f); |
| 539 | tm.tm_hour = bcd2bin(regs[ISL1219_REG_HRT - ISL1219_REG_SCT] & 0x3f); |
| 540 | tm.tm_mday = bcd2bin(regs[ISL1219_REG_DTT - ISL1219_REG_SCT] & 0x3f); |
| 541 | tm.tm_mon = |
| 542 | bcd2bin(regs[ISL1219_REG_MOT - ISL1219_REG_SCT] & 0x1f) - 1; |
| 543 | tm.tm_year = bcd2bin(regs[ISL1219_REG_YRT - ISL1219_REG_SCT]) + 100; |
| 544 | |
| 545 | sr = rtc_valid_tm(&tm); |
| 546 | if (sr) |
| 547 | return sr; |
| 548 | |
| 549 | return sprintf(buf, "%llu\n", |
| 550 | (unsigned long long)rtc_tm_to_time64(&tm)); |
| 551 | }; |
| 552 | |
| 553 | static DEVICE_ATTR_RW(timestamp0); |
| 554 | |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 555 | static irqreturn_t |
| 556 | isl1208_rtc_interrupt(int irq, void *data) |
| 557 | { |
| 558 | unsigned long timeout = jiffies + msecs_to_jiffies(1000); |
| 559 | struct i2c_client *client = data; |
Jan Luebbe | 72fca4a | 2013-02-04 14:28:53 -0800 | [diff] [blame] | 560 | struct rtc_device *rtc = i2c_get_clientdata(client); |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 561 | int handled = 0, sr, err; |
| 562 | |
| 563 | /* |
| 564 | * I2C reads get NAK'ed if we read straight away after an interrupt? |
| 565 | * Using a mdelay/msleep didn't seem to help either, so we work around |
| 566 | * this by continually trying to read the register for a short time. |
| 567 | */ |
| 568 | while (1) { |
| 569 | sr = isl1208_i2c_get_sr(client); |
| 570 | if (sr >= 0) |
| 571 | break; |
| 572 | |
| 573 | if (time_after(jiffies, timeout)) { |
| 574 | dev_err(&client->dev, "%s: reading SR failed\n", |
| 575 | __func__); |
| 576 | return sr; |
| 577 | } |
| 578 | } |
| 579 | |
| 580 | if (sr & ISL1208_REG_SR_ALM) { |
| 581 | dev_dbg(&client->dev, "alarm!\n"); |
| 582 | |
Jan Luebbe | 72fca4a | 2013-02-04 14:28:53 -0800 | [diff] [blame] | 583 | rtc_update_irq(rtc, 1, RTC_IRQF | RTC_AF); |
| 584 | |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 585 | /* Clear the alarm */ |
| 586 | sr &= ~ISL1208_REG_SR_ALM; |
| 587 | sr = i2c_smbus_write_byte_data(client, ISL1208_REG_SR, sr); |
| 588 | if (sr < 0) |
| 589 | dev_err(&client->dev, "%s: writing SR failed\n", |
| 590 | __func__); |
| 591 | else |
| 592 | handled = 1; |
| 593 | |
| 594 | /* Disable the alarm */ |
| 595 | err = isl1208_rtc_toggle_alarm(client, 0); |
| 596 | if (err) |
| 597 | return err; |
| 598 | } |
| 599 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 600 | if (sr & ISL1208_REG_SR_EVT) { |
| 601 | sysfs_notify(&rtc->dev.kobj, NULL, |
| 602 | dev_attr_timestamp0.attr.name); |
| 603 | dev_warn(&client->dev, "event detected"); |
| 604 | handled = 1; |
| 605 | } |
| 606 | |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 607 | return handled ? IRQ_HANDLED : IRQ_NONE; |
| 608 | } |
| 609 | |
David Brownell | ff8371a | 2006-09-30 23:28:17 -0700 | [diff] [blame] | 610 | static const struct rtc_class_ops isl1208_rtc_ops = { |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 611 | .proc = isl1208_rtc_proc, |
| 612 | .read_time = isl1208_rtc_read_time, |
| 613 | .set_time = isl1208_rtc_set_time, |
| 614 | .read_alarm = isl1208_rtc_read_alarm, |
Ryan Mallon | cf044f0 | 2011-03-22 16:34:53 -0700 | [diff] [blame] | 615 | .set_alarm = isl1208_rtc_set_alarm, |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 616 | }; |
| 617 | |
| 618 | /* sysfs interface */ |
| 619 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 620 | static ssize_t |
| 621 | isl1208_sysfs_show_atrim(struct device *dev, |
| 622 | struct device_attribute *attr, char *buf) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 623 | { |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 624 | int atr = isl1208_i2c_get_atr(to_i2c_client(dev->parent)); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 625 | if (atr < 0) |
| 626 | return atr; |
| 627 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 628 | return sprintf(buf, "%d.%.2d pF\n", atr >> 2, (atr & 0x3) * 25); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 629 | } |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 630 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 631 | static DEVICE_ATTR(atrim, S_IRUGO, isl1208_sysfs_show_atrim, NULL); |
| 632 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 633 | static ssize_t |
| 634 | isl1208_sysfs_show_dtrim(struct device *dev, |
| 635 | struct device_attribute *attr, char *buf) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 636 | { |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 637 | int dtr = isl1208_i2c_get_dtr(to_i2c_client(dev->parent)); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 638 | if (dtr < 0) |
| 639 | return dtr; |
| 640 | |
Trent Piepho | c8c97a4f | 2019-01-02 16:00:17 +0000 | [diff] [blame^] | 641 | return sprintf(buf, "%d ppm\n", dtr - 100); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 642 | } |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 643 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 644 | static DEVICE_ATTR(dtrim, S_IRUGO, isl1208_sysfs_show_dtrim, NULL); |
| 645 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 646 | static ssize_t |
| 647 | isl1208_sysfs_show_usr(struct device *dev, |
| 648 | struct device_attribute *attr, char *buf) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 649 | { |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 650 | int usr = isl1208_i2c_get_usr(to_i2c_client(dev->parent)); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 651 | if (usr < 0) |
| 652 | return usr; |
| 653 | |
| 654 | return sprintf(buf, "0x%.4x\n", usr); |
| 655 | } |
| 656 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 657 | static ssize_t |
| 658 | isl1208_sysfs_store_usr(struct device *dev, |
| 659 | struct device_attribute *attr, |
| 660 | const char *buf, size_t count) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 661 | { |
| 662 | int usr = -1; |
| 663 | |
| 664 | if (buf[0] == '0' && (buf[1] == 'x' || buf[1] == 'X')) { |
| 665 | if (sscanf(buf, "%x", &usr) != 1) |
| 666 | return -EINVAL; |
| 667 | } else { |
| 668 | if (sscanf(buf, "%d", &usr) != 1) |
| 669 | return -EINVAL; |
| 670 | } |
| 671 | |
| 672 | if (usr < 0 || usr > 0xffff) |
| 673 | return -EINVAL; |
| 674 | |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 675 | if (isl1208_i2c_set_usr(to_i2c_client(dev->parent), usr)) |
| 676 | return -EIO; |
| 677 | |
| 678 | return count; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 679 | } |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 680 | |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 681 | static DEVICE_ATTR(usr, S_IRUGO | S_IWUSR, isl1208_sysfs_show_usr, |
| 682 | isl1208_sysfs_store_usr); |
| 683 | |
H Hartley Sweeten | e17ab5cb | 2010-05-24 14:33:46 -0700 | [diff] [blame] | 684 | static struct attribute *isl1208_rtc_attrs[] = { |
| 685 | &dev_attr_atrim.attr, |
| 686 | &dev_attr_dtrim.attr, |
| 687 | &dev_attr_usr.attr, |
| 688 | NULL |
| 689 | }; |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 690 | |
H Hartley Sweeten | e17ab5cb | 2010-05-24 14:33:46 -0700 | [diff] [blame] | 691 | static const struct attribute_group isl1208_rtc_sysfs_files = { |
| 692 | .attrs = isl1208_rtc_attrs, |
| 693 | }; |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 694 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 695 | static struct attribute *isl1219_rtc_attrs[] = { |
| 696 | &dev_attr_timestamp0.attr, |
| 697 | NULL |
| 698 | }; |
| 699 | |
| 700 | static const struct attribute_group isl1219_rtc_sysfs_files = { |
| 701 | .attrs = isl1219_rtc_attrs, |
| 702 | }; |
| 703 | |
Denis Osterland | 9ece7cd | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 704 | static int isl1208_setup_irq(struct i2c_client *client, int irq) |
| 705 | { |
| 706 | int rc = devm_request_threaded_irq(&client->dev, irq, NULL, |
| 707 | isl1208_rtc_interrupt, |
| 708 | IRQF_SHARED | IRQF_ONESHOT, |
| 709 | isl1208_driver.driver.name, |
| 710 | client); |
| 711 | if (!rc) { |
| 712 | device_init_wakeup(&client->dev, 1); |
| 713 | enable_irq_wake(irq); |
| 714 | } else { |
| 715 | dev_err(&client->dev, |
| 716 | "Unable to request irq %d, no alarm support\n", |
| 717 | irq); |
| 718 | } |
| 719 | return rc; |
| 720 | } |
| 721 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 722 | static int |
Jean Delvare | d2653e9 | 2008-04-29 23:11:39 +0200 | [diff] [blame] | 723 | isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 724 | { |
| 725 | int rc = 0; |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 726 | struct rtc_device *rtc; |
Denis Osterland | 9ece7cd | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 727 | int evdet_irq = -1; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 728 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 729 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) |
| 730 | return -ENODEV; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 731 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 732 | if (isl1208_i2c_validate_client(client) < 0) |
| 733 | return -ENODEV; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 734 | |
Denis Osterland | 236b718 | 2018-03-05 10:43:53 +0000 | [diff] [blame] | 735 | rtc = devm_rtc_allocate_device(&client->dev); |
Sachin Kamat | adce8c1 | 2013-11-12 15:10:30 -0800 | [diff] [blame] | 736 | if (IS_ERR(rtc)) |
| 737 | return PTR_ERR(rtc); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 738 | |
Denis Osterland | 236b718 | 2018-03-05 10:43:53 +0000 | [diff] [blame] | 739 | rtc->ops = &isl1208_rtc_ops; |
| 740 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 741 | i2c_set_clientdata(client, rtc); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 742 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 743 | rc = isl1208_i2c_get_sr(client); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 744 | if (rc < 0) { |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 745 | dev_err(&client->dev, "reading status failed\n"); |
Sachin Kamat | adce8c1 | 2013-11-12 15:10:30 -0800 | [diff] [blame] | 746 | return rc; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 747 | } |
| 748 | |
| 749 | if (rc & ISL1208_REG_SR_RTCF) |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 750 | dev_warn(&client->dev, "rtc power failure detected, " |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 751 | "please set clock.\n"); |
| 752 | |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 753 | if (id->driver_data == TYPE_ISL1219) { |
Denis Osterland | cfa3062 | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 754 | struct device_node *np = client->dev.of_node; |
| 755 | u32 evienb; |
| 756 | |
| 757 | rc = i2c_smbus_read_byte_data(client, ISL1219_REG_EV); |
| 758 | if (rc < 0) { |
| 759 | dev_err(&client->dev, "failed to read EV reg\n"); |
| 760 | return rc; |
| 761 | } |
| 762 | rc |= ISL1219_REG_EV_EVEN; |
| 763 | if (!of_property_read_u32(np, "isil,ev-evienb", &evienb)) { |
| 764 | if (evienb) |
| 765 | rc |= ISL1219_REG_EV_EVIENB; |
| 766 | else |
| 767 | rc &= ~ISL1219_REG_EV_EVIENB; |
| 768 | } |
| 769 | rc = i2c_smbus_write_byte_data(client, ISL1219_REG_EV, rc); |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 770 | if (rc < 0) { |
| 771 | dev_err(&client->dev, "could not enable tamper detection\n"); |
| 772 | return rc; |
| 773 | } |
| 774 | rc = rtc_add_group(rtc, &isl1219_rtc_sysfs_files); |
| 775 | if (rc) |
| 776 | return rc; |
Denis Osterland | cfa3062 | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 777 | evdet_irq = of_irq_get_byname(np, "evdet"); |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 778 | } |
| 779 | |
Alexandre Belloni | 1b4c794 | 2018-09-15 13:29:56 +0200 | [diff] [blame] | 780 | rc = rtc_add_group(rtc, &isl1208_rtc_sysfs_files); |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 781 | if (rc) |
Sachin Kamat | adce8c1 | 2013-11-12 15:10:30 -0800 | [diff] [blame] | 782 | return rc; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 783 | |
Denis Osterland | 9ece7cd | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 784 | if (client->irq > 0) |
| 785 | rc = isl1208_setup_irq(client, client->irq); |
| 786 | if (rc) |
| 787 | return rc; |
| 788 | |
| 789 | if (evdet_irq > 0 && evdet_irq != client->irq) |
| 790 | rc = isl1208_setup_irq(client, evdet_irq); |
| 791 | if (rc) |
| 792 | return rc; |
Michael Grzeschik | 9d327c2 | 2018-03-05 10:43:53 +0000 | [diff] [blame] | 793 | |
Denis Osterland | 236b718 | 2018-03-05 10:43:53 +0000 | [diff] [blame] | 794 | return rtc_register_device(rtc); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 795 | } |
| 796 | |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 797 | static const struct i2c_device_id isl1208_id[] = { |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 798 | { "isl1208", TYPE_ISL1208 }, |
| 799 | { "isl1218", TYPE_ISL1218 }, |
| 800 | { "isl1219", TYPE_ISL1219 }, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 801 | { } |
| 802 | }; |
| 803 | MODULE_DEVICE_TABLE(i2c, isl1208_id); |
| 804 | |
Javier Martinez Canillas | 0383550 | 2017-03-03 11:29:20 -0300 | [diff] [blame] | 805 | static const struct of_device_id isl1208_of_match[] = { |
| 806 | { .compatible = "isil,isl1208" }, |
| 807 | { .compatible = "isil,isl1218" }, |
Michael Grzeschik | dd35bdb | 2018-07-24 11:31:21 +0000 | [diff] [blame] | 808 | { .compatible = "isil,isl1219" }, |
Javier Martinez Canillas | 0383550 | 2017-03-03 11:29:20 -0300 | [diff] [blame] | 809 | { } |
| 810 | }; |
| 811 | MODULE_DEVICE_TABLE(of, isl1208_of_match); |
| 812 | |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 813 | static struct i2c_driver isl1208_driver = { |
| 814 | .driver = { |
Javier Martinez Canillas | 0383550 | 2017-03-03 11:29:20 -0300 | [diff] [blame] | 815 | .name = "rtc-isl1208", |
| 816 | .of_match_table = of_match_ptr(isl1208_of_match), |
| 817 | }, |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 818 | .probe = isl1208_probe, |
Jean Delvare | 3760f73 | 2008-04-29 23:11:40 +0200 | [diff] [blame] | 819 | .id_table = isl1208_id, |
Alessandro Zummo | 9edae7b | 2008-04-28 02:11:53 -0700 | [diff] [blame] | 820 | }; |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 821 | |
Axel Lin | 0abc920 | 2012-03-23 15:02:31 -0700 | [diff] [blame] | 822 | module_i2c_driver(isl1208_driver); |
Herbert Valerio Riedel | 7e56a7d | 2006-07-14 00:24:11 -0700 | [diff] [blame] | 823 | |
| 824 | MODULE_AUTHOR("Herbert Valerio Riedel <hvr@gnu.org>"); |
| 825 | MODULE_DESCRIPTION("Intersil ISL1208 RTC driver"); |
| 826 | MODULE_LICENSE("GPL"); |