Thomas Gleixner | c942fdd | 2019-05-27 08:55:06 +0200 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
Rafael J. Wysocki | aa57aca | 2015-07-16 02:01:28 +0200 | [diff] [blame] | 3 | * drivers/acpi/power.c - ACPI Power Resources management. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Rafael J. Wysocki | aa57aca | 2015-07-16 02:01:28 +0200 | [diff] [blame] | 5 | * Copyright (C) 2001 - 2015 Intel Corp. |
| 6 | * Author: Andy Grover <andrew.grover@intel.com> |
| 7 | * Author: Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 8 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * ACPI power-managed devices may be controlled in two ways: |
| 13 | * 1. via "Device Specific (D-State) Control" |
| 14 | * 2. via "Power Resource Control". |
Rafael J. Wysocki | aa57aca | 2015-07-16 02:01:28 +0200 | [diff] [blame] | 15 | * The code below deals with ACPI Power Resources control. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | * |
Rafael J. Wysocki | aa57aca | 2015-07-16 02:01:28 +0200 | [diff] [blame] | 17 | * An ACPI "power resource object" represents a software controllable power |
| 18 | * plane, clock plane, or other resource depended on by a device. |
| 19 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | * A device may rely on multiple power resources, and a power resource |
| 21 | * may be shared by multiple devices. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/kernel.h> |
| 25 | #include <linux/module.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/types.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 28 | #include <linux/slab.h> |
Lin Ming | 0090def | 2012-03-29 14:09:39 +0800 | [diff] [blame] | 29 | #include <linux/pm_runtime.h> |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 30 | #include <linux/sysfs.h> |
Lv Zheng | 8b48463 | 2013-12-03 08:49:16 +0800 | [diff] [blame] | 31 | #include <linux/acpi.h> |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 32 | #include "sleep.h" |
Lin Ming | 0090def | 2012-03-29 14:09:39 +0800 | [diff] [blame] | 33 | #include "internal.h" |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 34 | |
Bjorn Helgaas | 89595b8 | 2008-11-07 16:57:45 -0700 | [diff] [blame] | 35 | #define _COMPONENT ACPI_POWER_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 36 | ACPI_MODULE_NAME("power"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #define ACPI_POWER_CLASS "power_resource" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #define ACPI_POWER_DEVICE_NAME "Power Resource" |
| 39 | #define ACPI_POWER_FILE_INFO "info" |
| 40 | #define ACPI_POWER_FILE_STATUS "state" |
| 41 | #define ACPI_POWER_RESOURCE_STATE_OFF 0x00 |
| 42 | #define ACPI_POWER_RESOURCE_STATE_ON 0x01 |
| 43 | #define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF |
Zhao Yakui | f5adfaa | 2008-08-11 14:57:50 +0800 | [diff] [blame] | 44 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 45 | struct acpi_power_resource { |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 46 | struct acpi_device device; |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 47 | struct list_head list_node; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 48 | char *name; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 49 | u32 system_level; |
| 50 | u32 order; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 51 | unsigned int ref_count; |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 52 | bool wakeup_enabled; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 53 | struct mutex resource_lock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | }; |
| 55 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 56 | struct acpi_power_resource_entry { |
| 57 | struct list_head node; |
| 58 | struct acpi_power_resource *resource; |
| 59 | }; |
| 60 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 61 | static LIST_HEAD(acpi_power_resource_list); |
| 62 | static DEFINE_MUTEX(power_resource_list_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | /* -------------------------------------------------------------------------- |
| 65 | Power Resource Management |
| 66 | -------------------------------------------------------------------------- */ |
| 67 | |
Rafael J. Wysocki | b1c0f99 | 2013-01-24 12:50:09 +0100 | [diff] [blame] | 68 | static inline |
| 69 | struct acpi_power_resource *to_power_resource(struct acpi_device *device) |
| 70 | { |
| 71 | return container_of(device, struct acpi_power_resource, device); |
| 72 | } |
| 73 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 74 | static struct acpi_power_resource *acpi_power_get_context(acpi_handle handle) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 75 | { |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 76 | struct acpi_device *device; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 78 | if (acpi_bus_get_device(handle, &device)) |
| 79 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
Rafael J. Wysocki | b1c0f99 | 2013-01-24 12:50:09 +0100 | [diff] [blame] | 81 | return to_power_resource(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | } |
| 83 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 84 | static int acpi_power_resources_list_add(acpi_handle handle, |
| 85 | struct list_head *list) |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 86 | { |
| 87 | struct acpi_power_resource *resource = acpi_power_get_context(handle); |
| 88 | struct acpi_power_resource_entry *entry; |
| 89 | |
| 90 | if (!resource || !list) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 91 | return -EINVAL; |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 92 | |
| 93 | entry = kzalloc(sizeof(*entry), GFP_KERNEL); |
| 94 | if (!entry) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 95 | return -ENOMEM; |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 96 | |
| 97 | entry->resource = resource; |
| 98 | if (!list_empty(list)) { |
| 99 | struct acpi_power_resource_entry *e; |
| 100 | |
| 101 | list_for_each_entry(e, list, node) |
| 102 | if (e->resource->order > resource->order) { |
| 103 | list_add_tail(&entry->node, &e->node); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 104 | return 0; |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 105 | } |
| 106 | } |
| 107 | list_add_tail(&entry->node, list); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 108 | return 0; |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | void acpi_power_resources_list_free(struct list_head *list) |
| 112 | { |
| 113 | struct acpi_power_resource_entry *entry, *e; |
| 114 | |
| 115 | list_for_each_entry_safe(entry, e, list, node) { |
| 116 | list_del(&entry->node); |
| 117 | kfree(entry); |
| 118 | } |
| 119 | } |
| 120 | |
Hans de Goede | 7d7b467 | 2018-12-30 18:25:00 +0100 | [diff] [blame] | 121 | static bool acpi_power_resource_is_dup(union acpi_object *package, |
| 122 | unsigned int start, unsigned int i) |
| 123 | { |
| 124 | acpi_handle rhandle, dup; |
| 125 | unsigned int j; |
| 126 | |
| 127 | /* The caller is expected to check the package element types */ |
| 128 | rhandle = package->package.elements[i].reference.handle; |
| 129 | for (j = start; j < i; j++) { |
| 130 | dup = package->package.elements[j].reference.handle; |
| 131 | if (dup == rhandle) |
| 132 | return true; |
| 133 | } |
| 134 | |
| 135 | return false; |
| 136 | } |
| 137 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 138 | int acpi_extract_power_resources(union acpi_object *package, unsigned int start, |
| 139 | struct list_head *list) |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 140 | { |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 141 | unsigned int i; |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 142 | int err = 0; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 143 | |
| 144 | for (i = start; i < package->package.count; i++) { |
| 145 | union acpi_object *element = &package->package.elements[i]; |
| 146 | acpi_handle rhandle; |
| 147 | |
| 148 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 149 | err = -ENODATA; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 150 | break; |
| 151 | } |
| 152 | rhandle = element->reference.handle; |
| 153 | if (!rhandle) { |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 154 | err = -ENODEV; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 155 | break; |
| 156 | } |
Hans de Goede | 7d7b467 | 2018-12-30 18:25:00 +0100 | [diff] [blame] | 157 | |
| 158 | /* Some ACPI tables contain duplicate power resource references */ |
| 159 | if (acpi_power_resource_is_dup(package, start, i)) |
| 160 | continue; |
| 161 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 162 | err = acpi_add_power_resource(rhandle); |
| 163 | if (err) |
| 164 | break; |
| 165 | |
| 166 | err = acpi_power_resources_list_add(rhandle, list); |
| 167 | if (err) |
| 168 | break; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 169 | } |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 170 | if (err) |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 171 | acpi_power_resources_list_free(list); |
| 172 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 173 | return err; |
Rafael J. Wysocki | ef85bdb | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 174 | } |
| 175 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 176 | static int acpi_power_get_state(acpi_handle handle, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | acpi_status status = AE_OK; |
Matthew Wilcox | 27663c5 | 2008-10-10 02:22:59 -0400 | [diff] [blame] | 179 | unsigned long long sta = 0; |
Lin Ming | 60a4ce7 | 2008-12-16 17:02:22 +0800 | [diff] [blame] | 180 | char node_name[5]; |
| 181 | struct acpi_buffer buffer = { sizeof(node_name), node_name }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 184 | if (!handle || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 185 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Zhao Yakui | a51e145 | 2008-08-11 14:55:05 +0800 | [diff] [blame] | 187 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 189 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 191 | *state = (sta & 0x01)?ACPI_POWER_RESOURCE_STATE_ON: |
| 192 | ACPI_POWER_RESOURCE_STATE_OFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
Lin Ming | 60a4ce7 | 2008-12-16 17:02:22 +0800 | [diff] [blame] | 194 | acpi_get_name(handle, ACPI_SINGLE_NAME, &buffer); |
| 195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n", |
Lin Ming | 60a4ce7 | 2008-12-16 17:02:22 +0800 | [diff] [blame] | 197 | node_name, |
Zhao Yakui | b1b57fb | 2008-10-27 16:04:53 +0800 | [diff] [blame] | 198 | *state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 200 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | } |
| 202 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 203 | static int acpi_power_get_list_state(struct list_head *list, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | { |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 205 | struct acpi_power_resource_entry *entry; |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 206 | int cur_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | |
| 208 | if (!list || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 209 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | /* The state of the list is 'on' IFF all resources are 'on'. */ |
Arnd Bergmann | fe8c470 | 2017-04-19 19:47:04 +0200 | [diff] [blame] | 212 | cur_state = 0; |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 213 | list_for_each_entry(entry, list, node) { |
| 214 | struct acpi_power_resource *resource = entry->resource; |
| 215 | acpi_handle handle = resource->device.handle; |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 216 | int result; |
| 217 | |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 218 | mutex_lock(&resource->resource_lock); |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 219 | result = acpi_power_get_state(handle, &cur_state); |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 220 | mutex_unlock(&resource->resource_lock); |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 221 | if (result) |
| 222 | return result; |
| 223 | |
| 224 | if (cur_state != ACPI_POWER_RESOURCE_STATE_ON) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | break; |
| 226 | } |
| 227 | |
| 228 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource list is %s\n", |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 229 | cur_state ? "on" : "off")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 231 | *state = cur_state; |
Rafael J. Wysocki | d0515d9 | 2011-01-06 23:38:57 +0100 | [diff] [blame] | 232 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 235 | static int __acpi_power_on(struct acpi_power_resource *resource) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 237 | acpi_status status = AE_OK; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 238 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 239 | status = acpi_evaluate_object(resource->device.handle, "_ON", NULL, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 241 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 243 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned on\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 244 | resource->name)); |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 245 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 246 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 249 | static int acpi_power_on_unlocked(struct acpi_power_resource *resource) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | { |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 251 | int result = 0; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 252 | |
| 253 | if (resource->ref_count++) { |
| 254 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Mika Westerberg | 10a0b61 | 2013-07-05 12:15:56 +0300 | [diff] [blame] | 255 | "Power resource [%s] already on\n", |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 256 | resource->name)); |
| 257 | } else { |
| 258 | result = __acpi_power_on(resource); |
Rafael J. Wysocki | 41863fc | 2013-10-16 23:05:42 +0200 | [diff] [blame] | 259 | if (result) |
Rafael J. Wysocki | 12b3b5a | 2010-11-25 00:03:32 +0100 | [diff] [blame] | 260 | resource->ref_count--; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 261 | } |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 262 | return result; |
| 263 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 265 | static int acpi_power_on(struct acpi_power_resource *resource) |
| 266 | { |
| 267 | int result; |
| 268 | |
| 269 | mutex_lock(&resource->resource_lock); |
| 270 | result = acpi_power_on_unlocked(resource); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 271 | mutex_unlock(&resource->resource_lock); |
Rafael J. Wysocki | 12b3b5a | 2010-11-25 00:03:32 +0100 | [diff] [blame] | 272 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | } |
| 274 | |
Rafael J. Wysocki | 660b111 | 2013-01-25 21:51:57 +0100 | [diff] [blame] | 275 | static int __acpi_power_off(struct acpi_power_resource *resource) |
| 276 | { |
| 277 | acpi_status status; |
| 278 | |
| 279 | status = acpi_evaluate_object(resource->device.handle, "_OFF", |
| 280 | NULL, NULL); |
| 281 | if (ACPI_FAILURE(status)) |
| 282 | return -ENODEV; |
| 283 | |
| 284 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Power resource [%s] turned off\n", |
| 285 | resource->name)); |
| 286 | return 0; |
| 287 | } |
| 288 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 289 | static int acpi_power_off_unlocked(struct acpi_power_resource *resource) |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 290 | { |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 291 | int result = 0; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 292 | |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 293 | if (!resource->ref_count) { |
| 294 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Mika Westerberg | 10a0b61 | 2013-07-05 12:15:56 +0300 | [diff] [blame] | 295 | "Power resource [%s] already off\n", |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 296 | resource->name)); |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 297 | return 0; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 298 | } |
| 299 | |
| 300 | if (--resource->ref_count) { |
| 301 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 302 | "Power resource [%s] still in use\n", |
| 303 | resource->name)); |
Rafael J. Wysocki | 660b111 | 2013-01-25 21:51:57 +0100 | [diff] [blame] | 304 | } else { |
| 305 | result = __acpi_power_off(resource); |
| 306 | if (result) |
| 307 | resource->ref_count++; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 308 | } |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 309 | return result; |
| 310 | } |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 311 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 312 | static int acpi_power_off(struct acpi_power_resource *resource) |
| 313 | { |
| 314 | int result; |
| 315 | |
| 316 | mutex_lock(&resource->resource_lock); |
| 317 | result = acpi_power_off_unlocked(resource); |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 318 | mutex_unlock(&resource->resource_lock); |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 319 | return result; |
| 320 | } |
| 321 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 322 | static int acpi_power_off_list(struct list_head *list) |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 323 | { |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 324 | struct acpi_power_resource_entry *entry; |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 325 | int result = 0; |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 326 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 327 | list_for_each_entry_reverse(entry, list, node) { |
| 328 | result = acpi_power_off(entry->resource); |
| 329 | if (result) |
| 330 | goto err; |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 331 | } |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 332 | return 0; |
| 333 | |
| 334 | err: |
| 335 | list_for_each_entry_continue(entry, list, node) |
| 336 | acpi_power_on(entry->resource); |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 337 | |
| 338 | return result; |
| 339 | } |
| 340 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 341 | static int acpi_power_on_list(struct list_head *list) |
| 342 | { |
| 343 | struct acpi_power_resource_entry *entry; |
| 344 | int result = 0; |
| 345 | |
| 346 | list_for_each_entry(entry, list, node) { |
| 347 | result = acpi_power_on(entry->resource); |
| 348 | if (result) |
| 349 | goto err; |
| 350 | } |
| 351 | return 0; |
| 352 | |
| 353 | err: |
| 354 | list_for_each_entry_continue_reverse(entry, list, node) |
| 355 | acpi_power_off(entry->resource); |
| 356 | |
| 357 | return result; |
| 358 | } |
| 359 | |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 360 | static struct attribute *attrs[] = { |
| 361 | NULL, |
| 362 | }; |
| 363 | |
Arvind Yadav | 26408b2 | 2017-06-30 17:39:05 +0530 | [diff] [blame] | 364 | static const struct attribute_group attr_groups[] = { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 365 | [ACPI_STATE_D0] = { |
| 366 | .name = "power_resources_D0", |
| 367 | .attrs = attrs, |
| 368 | }, |
| 369 | [ACPI_STATE_D1] = { |
| 370 | .name = "power_resources_D1", |
| 371 | .attrs = attrs, |
| 372 | }, |
| 373 | [ACPI_STATE_D2] = { |
| 374 | .name = "power_resources_D2", |
| 375 | .attrs = attrs, |
| 376 | }, |
| 377 | [ACPI_STATE_D3_HOT] = { |
| 378 | .name = "power_resources_D3hot", |
| 379 | .attrs = attrs, |
| 380 | }, |
| 381 | }; |
| 382 | |
Arvind Yadav | 26408b2 | 2017-06-30 17:39:05 +0530 | [diff] [blame] | 383 | static const struct attribute_group wakeup_attr_group = { |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 384 | .name = "power_resources_wakeup", |
| 385 | .attrs = attrs, |
| 386 | }; |
| 387 | |
| 388 | static void acpi_power_hide_list(struct acpi_device *adev, |
| 389 | struct list_head *resources, |
Arvind Yadav | 26408b2 | 2017-06-30 17:39:05 +0530 | [diff] [blame] | 390 | const struct attribute_group *attr_group) |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 391 | { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 392 | struct acpi_power_resource_entry *entry; |
| 393 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 394 | if (list_empty(resources)) |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 395 | return; |
| 396 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 397 | list_for_each_entry_reverse(entry, resources, node) { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 398 | struct acpi_device *res_dev = &entry->resource->device; |
| 399 | |
| 400 | sysfs_remove_link_from_group(&adev->dev.kobj, |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 401 | attr_group->name, |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 402 | dev_name(&res_dev->dev)); |
| 403 | } |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 404 | sysfs_remove_group(&adev->dev.kobj, attr_group); |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 405 | } |
| 406 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 407 | static void acpi_power_expose_list(struct acpi_device *adev, |
| 408 | struct list_head *resources, |
Arvind Yadav | 26408b2 | 2017-06-30 17:39:05 +0530 | [diff] [blame] | 409 | const struct attribute_group *attr_group) |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 410 | { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 411 | struct acpi_power_resource_entry *entry; |
| 412 | int ret; |
| 413 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 414 | if (list_empty(resources)) |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 415 | return; |
| 416 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 417 | ret = sysfs_create_group(&adev->dev.kobj, attr_group); |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 418 | if (ret) |
| 419 | return; |
| 420 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 421 | list_for_each_entry(entry, resources, node) { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 422 | struct acpi_device *res_dev = &entry->resource->device; |
| 423 | |
| 424 | ret = sysfs_add_link_to_group(&adev->dev.kobj, |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 425 | attr_group->name, |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 426 | &res_dev->dev.kobj, |
| 427 | dev_name(&res_dev->dev)); |
| 428 | if (ret) { |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 429 | acpi_power_hide_list(adev, resources, attr_group); |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 430 | break; |
| 431 | } |
| 432 | } |
| 433 | } |
| 434 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 435 | static void acpi_power_expose_hide(struct acpi_device *adev, |
| 436 | struct list_head *resources, |
Arvind Yadav | 26408b2 | 2017-06-30 17:39:05 +0530 | [diff] [blame] | 437 | const struct attribute_group *attr_group, |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 438 | bool expose) |
| 439 | { |
| 440 | if (expose) |
| 441 | acpi_power_expose_list(adev, resources, attr_group); |
| 442 | else |
| 443 | acpi_power_hide_list(adev, resources, attr_group); |
| 444 | } |
| 445 | |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 446 | void acpi_power_add_remove_device(struct acpi_device *adev, bool add) |
| 447 | { |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 448 | int state; |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 449 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 450 | if (adev->wakeup.flags.valid) |
| 451 | acpi_power_expose_hide(adev, &adev->wakeup.resources, |
| 452 | &wakeup_attr_group, add); |
| 453 | |
Rafael J. Wysocki | 18a3870 | 2013-01-25 21:51:32 +0100 | [diff] [blame] | 454 | if (!adev->power.flags.power_resources) |
| 455 | return; |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 456 | |
Rafael J. Wysocki | 41a2a46 | 2013-04-11 22:41:48 +0200 | [diff] [blame] | 457 | for (state = ACPI_STATE_D0; state <= ACPI_STATE_D3_HOT; state++) |
| 458 | acpi_power_expose_hide(adev, |
| 459 | &adev->power.states[state].resources, |
| 460 | &attr_groups[state], add); |
Lin Ming | 0090def | 2012-03-29 14:09:39 +0800 | [diff] [blame] | 461 | } |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 462 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 463 | int acpi_power_wakeup_list_init(struct list_head *list, int *system_level_p) |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 464 | { |
| 465 | struct acpi_power_resource_entry *entry; |
| 466 | int system_level = 5; |
| 467 | |
| 468 | list_for_each_entry(entry, list, node) { |
| 469 | struct acpi_power_resource *resource = entry->resource; |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 470 | acpi_handle handle = resource->device.handle; |
| 471 | int result; |
| 472 | int state; |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 473 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 474 | mutex_lock(&resource->resource_lock); |
| 475 | |
| 476 | result = acpi_power_get_state(handle, &state); |
| 477 | if (result) { |
| 478 | mutex_unlock(&resource->resource_lock); |
| 479 | return result; |
| 480 | } |
| 481 | if (state == ACPI_POWER_RESOURCE_STATE_ON) { |
| 482 | resource->ref_count++; |
| 483 | resource->wakeup_enabled = true; |
| 484 | } |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 485 | if (system_level > resource->system_level) |
| 486 | system_level = resource->system_level; |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 487 | |
| 488 | mutex_unlock(&resource->resource_lock); |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 489 | } |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 490 | *system_level_p = system_level; |
| 491 | return 0; |
Rafael J. Wysocki | 0596a52 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 492 | } |
| 493 | |
Rafael J. Wysocki | bc9b640 | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 494 | /* -------------------------------------------------------------------------- |
| 495 | Device Power Management |
| 496 | -------------------------------------------------------------------------- */ |
Lin Ming | 0090def | 2012-03-29 14:09:39 +0800 | [diff] [blame] | 497 | |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 498 | /** |
| 499 | * acpi_device_sleep_wake - execute _DSW (Device Sleep Wake) or (deprecated in |
| 500 | * ACPI 3.0) _PSW (Power State Wake) |
| 501 | * @dev: Device to handle. |
| 502 | * @enable: 0 - disable, 1 - enable the wake capabilities of the device. |
| 503 | * @sleep_state: Target sleep state of the system. |
| 504 | * @dev_state: Target power state of the device. |
| 505 | * |
| 506 | * Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 507 | * State Wake) for the device, if present. On failure reset the device's |
| 508 | * wakeup.flags.valid flag. |
| 509 | * |
| 510 | * RETURN VALUE: |
| 511 | * 0 if either _DSW or _PSW has been successfully executed |
| 512 | * 0 if neither _DSW nor _PSW has been found |
| 513 | * -ENODEV if the execution of either _DSW or _PSW has failed |
| 514 | */ |
| 515 | int acpi_device_sleep_wake(struct acpi_device *dev, |
| 516 | int enable, int sleep_state, int dev_state) |
| 517 | { |
| 518 | union acpi_object in_arg[3]; |
| 519 | struct acpi_object_list arg_list = { 3, in_arg }; |
| 520 | acpi_status status = AE_OK; |
| 521 | |
| 522 | /* |
| 523 | * Try to execute _DSW first. |
| 524 | * |
Bjorn Helgaas | 603fadf | 2019-03-25 13:34:00 -0500 | [diff] [blame] | 525 | * Three arguments are needed for the _DSW object: |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 526 | * Argument 0: enable/disable the wake capabilities |
| 527 | * Argument 1: target system state |
| 528 | * Argument 2: target device state |
| 529 | * When _DSW object is called to disable the wake capabilities, maybe |
Bjorn Helgaas | 603fadf | 2019-03-25 13:34:00 -0500 | [diff] [blame] | 530 | * the first argument is filled. The values of the other two arguments |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 531 | * are meaningless. |
| 532 | */ |
| 533 | in_arg[0].type = ACPI_TYPE_INTEGER; |
| 534 | in_arg[0].integer.value = enable; |
| 535 | in_arg[1].type = ACPI_TYPE_INTEGER; |
| 536 | in_arg[1].integer.value = sleep_state; |
| 537 | in_arg[2].type = ACPI_TYPE_INTEGER; |
| 538 | in_arg[2].integer.value = dev_state; |
| 539 | status = acpi_evaluate_object(dev->handle, "_DSW", &arg_list, NULL); |
| 540 | if (ACPI_SUCCESS(status)) { |
| 541 | return 0; |
| 542 | } else if (status != AE_NOT_FOUND) { |
| 543 | printk(KERN_ERR PREFIX "_DSW execution failed\n"); |
| 544 | dev->wakeup.flags.valid = 0; |
| 545 | return -ENODEV; |
| 546 | } |
| 547 | |
| 548 | /* Execute _PSW */ |
Jiang Liu | 0db9820 | 2013-06-29 00:24:39 +0800 | [diff] [blame] | 549 | status = acpi_execute_simple_method(dev->handle, "_PSW", enable); |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 550 | if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { |
| 551 | printk(KERN_ERR PREFIX "_PSW execution failed\n"); |
| 552 | dev->wakeup.flags.valid = 0; |
| 553 | return -ENODEV; |
| 554 | } |
| 555 | |
| 556 | return 0; |
| 557 | } |
| 558 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | /* |
| 560 | * Prepare a wakeup device, two steps (Ref ACPI 2.0:P229): |
| 561 | * 1. Power on the power resources required for the wakeup device |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 562 | * 2. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 563 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | */ |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 565 | int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 567 | struct acpi_power_resource_entry *entry; |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 568 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 571 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 573 | mutex_lock(&acpi_device_lock); |
| 574 | |
| 575 | if (dev->wakeup.prepare_count++) |
| 576 | goto out; |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 577 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 578 | list_for_each_entry(entry, &dev->wakeup.resources, node) { |
| 579 | struct acpi_power_resource *resource = entry->resource; |
| 580 | |
| 581 | mutex_lock(&resource->resource_lock); |
| 582 | |
| 583 | if (!resource->wakeup_enabled) { |
| 584 | err = acpi_power_on_unlocked(resource); |
| 585 | if (!err) |
| 586 | resource->wakeup_enabled = true; |
| 587 | } |
| 588 | |
| 589 | mutex_unlock(&resource->resource_lock); |
| 590 | |
| 591 | if (err) { |
| 592 | dev_err(&dev->dev, |
| 593 | "Cannot turn wakeup power resources on\n"); |
| 594 | dev->wakeup.flags.valid = 0; |
| 595 | goto out; |
| 596 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | } |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 598 | /* |
| 599 | * Passing 3 as the third argument below means the device may be |
| 600 | * put into arbitrary power state afterward. |
| 601 | */ |
| 602 | err = acpi_device_sleep_wake(dev, 1, sleep_state, 3); |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 603 | if (err) |
| 604 | dev->wakeup.prepare_count = 0; |
| 605 | |
| 606 | out: |
| 607 | mutex_unlock(&acpi_device_lock); |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 608 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | } |
| 610 | |
| 611 | /* |
| 612 | * Shutdown a wakeup device, counterpart of above method |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 613 | * 1. Execute _DSW (Device Sleep Wake) or (deprecated in ACPI 3.0) _PSW (Power |
| 614 | * State Wake) for the device, if present |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | * 2. Shutdown down the power resources |
| 616 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 617 | int acpi_disable_wakeup_device_power(struct acpi_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | { |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 619 | struct acpi_power_resource_entry *entry; |
Rafael J. Wysocki | 993cbe5 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 620 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | |
| 622 | if (!dev || !dev->wakeup.flags.valid) |
Rafael J. Wysocki | 77e7660 | 2008-07-07 03:33:34 +0200 | [diff] [blame] | 623 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 625 | mutex_lock(&acpi_device_lock); |
| 626 | |
| 627 | if (--dev->wakeup.prepare_count > 0) |
| 628 | goto out; |
| 629 | |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 630 | /* |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 631 | * Executing the code below even if prepare_count is already zero when |
| 632 | * the function is called may be useful, for example for initialisation. |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 633 | */ |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 634 | if (dev->wakeup.prepare_count < 0) |
| 635 | dev->wakeup.prepare_count = 0; |
Rafael J. Wysocki | 0af4b8c | 2008-07-07 03:34:11 +0200 | [diff] [blame] | 636 | |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 637 | err = acpi_device_sleep_wake(dev, 0, 0, 0); |
| 638 | if (err) |
| 639 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | |
Rafael J. Wysocki | b5d667e | 2013-02-23 23:15:21 +0100 | [diff] [blame] | 641 | list_for_each_entry(entry, &dev->wakeup.resources, node) { |
| 642 | struct acpi_power_resource *resource = entry->resource; |
| 643 | |
| 644 | mutex_lock(&resource->resource_lock); |
| 645 | |
| 646 | if (resource->wakeup_enabled) { |
| 647 | err = acpi_power_off_unlocked(resource); |
| 648 | if (!err) |
| 649 | resource->wakeup_enabled = false; |
| 650 | } |
| 651 | |
| 652 | mutex_unlock(&resource->resource_lock); |
| 653 | |
| 654 | if (err) { |
| 655 | dev_err(&dev->dev, |
| 656 | "Cannot turn wakeup power resources off\n"); |
| 657 | dev->wakeup.flags.valid = 0; |
| 658 | break; |
| 659 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 660 | } |
| 661 | |
Rafael J. Wysocki | 9b83ccd | 2009-09-08 23:15:31 +0200 | [diff] [blame] | 662 | out: |
| 663 | mutex_unlock(&acpi_device_lock); |
| 664 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | } |
| 666 | |
Rafael J. Wysocki | 32a00d2 | 2010-11-25 00:05:17 +0100 | [diff] [blame] | 667 | int acpi_power_get_inferred_state(struct acpi_device *device, int *state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 669 | int result = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 670 | int list_state = 0; |
| 671 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
Rafael J. Wysocki | 32a00d2 | 2010-11-25 00:05:17 +0100 | [diff] [blame] | 673 | if (!device || !state) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 674 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 676 | /* |
| 677 | * We know a device's inferred power state when all the resources |
| 678 | * required for a given D-state are 'on'. |
| 679 | */ |
Rafael J. Wysocki | 38c92ff | 2012-05-20 13:58:00 +0200 | [diff] [blame] | 680 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 681 | struct list_head *list = &device->power.states[i].resources; |
| 682 | |
| 683 | if (list_empty(list)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | continue; |
| 685 | |
| 686 | result = acpi_power_get_list_state(list, &list_state); |
| 687 | if (result) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 688 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | |
| 690 | if (list_state == ACPI_POWER_RESOURCE_STATE_ON) { |
Rafael J. Wysocki | 32a00d2 | 2010-11-25 00:05:17 +0100 | [diff] [blame] | 691 | *state = i; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 692 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | } |
| 694 | } |
| 695 | |
Rafael J. Wysocki | 20dacb7 | 2015-05-16 01:55:35 +0200 | [diff] [blame] | 696 | *state = device->power.states[ACPI_STATE_D3_COLD].flags.valid ? |
| 697 | ACPI_STATE_D3_COLD : ACPI_STATE_D3_HOT; |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 698 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | } |
| 700 | |
Rafael J. Wysocki | 30d3df41 | 2010-11-25 00:06:55 +0100 | [diff] [blame] | 701 | int acpi_power_on_resources(struct acpi_device *device, int state) |
| 702 | { |
Rafael J. Wysocki | 87e753b | 2013-01-22 12:56:16 +0100 | [diff] [blame] | 703 | if (!device || state < ACPI_STATE_D0 || state > ACPI_STATE_D3_HOT) |
Rafael J. Wysocki | 30d3df41 | 2010-11-25 00:06:55 +0100 | [diff] [blame] | 704 | return -EINVAL; |
| 705 | |
| 706 | return acpi_power_on_list(&device->power.states[state].resources); |
| 707 | } |
| 708 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 709 | int acpi_power_transition(struct acpi_device *device, int state) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | { |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 711 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | |
Zhang Rui | 3ebc81b | 2012-03-29 14:09:38 +0800 | [diff] [blame] | 713 | if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 714 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | |
Rafael J. Wysocki | 0b22452 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 716 | if (device->power.state == state || !device->flags.power_manageable) |
Rafael J. Wysocki | 212967c | 2010-11-25 00:02:36 +0100 | [diff] [blame] | 717 | return 0; |
| 718 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 719 | if ((device->power.state < ACPI_STATE_D0) |
Zhang Rui | 3ebc81b | 2012-03-29 14:09:38 +0800 | [diff] [blame] | 720 | || (device->power.state > ACPI_STATE_D3_COLD)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 721 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | /* |
| 724 | * First we reference all power resources required in the target list |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 725 | * (e.g. so the device doesn't lose power while transitioning). Then, |
| 726 | * we dereference all power resources used in the current list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | */ |
Rafael J. Wysocki | 5c7dd71 | 2012-05-18 00:39:35 +0200 | [diff] [blame] | 728 | if (state < ACPI_STATE_D3_COLD) |
| 729 | result = acpi_power_on_list( |
| 730 | &device->power.states[state].resources); |
| 731 | |
| 732 | if (!result && device->power.state < ACPI_STATE_D3_COLD) |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 733 | acpi_power_off_list( |
| 734 | &device->power.states[device->power.state].resources); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | |
Rafael J. Wysocki | d2ef555 | 2010-11-25 00:06:09 +0100 | [diff] [blame] | 736 | /* We shouldn't change the state unless the above operations succeed. */ |
| 737 | device->power.state = result ? ACPI_STATE_UNKNOWN : state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 739 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 740 | } |
| 741 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 742 | static void acpi_release_power_resource(struct device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | { |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 744 | struct acpi_device *device = to_acpi_device(dev); |
| 745 | struct acpi_power_resource *resource; |
| 746 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 747 | resource = container_of(device, struct acpi_power_resource, device); |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 748 | |
| 749 | mutex_lock(&power_resource_list_lock); |
| 750 | list_del(&resource->list_node); |
| 751 | mutex_unlock(&power_resource_list_lock); |
| 752 | |
Toshi Kani | c0af417 | 2013-03-04 21:30:42 +0000 | [diff] [blame] | 753 | acpi_free_pnp_ids(&device->pnp); |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 754 | kfree(resource); |
| 755 | } |
| 756 | |
Rafael J. Wysocki | b1c0f99 | 2013-01-24 12:50:09 +0100 | [diff] [blame] | 757 | static ssize_t acpi_power_in_use_show(struct device *dev, |
| 758 | struct device_attribute *attr, |
| 759 | char *buf) { |
| 760 | struct acpi_power_resource *resource; |
| 761 | |
| 762 | resource = to_power_resource(to_acpi_device(dev)); |
| 763 | return sprintf(buf, "%u\n", !!resource->ref_count); |
| 764 | } |
| 765 | static DEVICE_ATTR(resource_in_use, 0444, acpi_power_in_use_show, NULL); |
| 766 | |
| 767 | static void acpi_power_sysfs_remove(struct acpi_device *device) |
| 768 | { |
| 769 | device_remove_file(&device->dev, &dev_attr_resource_in_use); |
| 770 | } |
| 771 | |
Rafael J. Wysocki | d5eefa8 | 2015-05-21 04:19:49 +0200 | [diff] [blame] | 772 | static void acpi_power_add_resource_to_list(struct acpi_power_resource *resource) |
| 773 | { |
| 774 | mutex_lock(&power_resource_list_lock); |
| 775 | |
| 776 | if (!list_empty(&acpi_power_resource_list)) { |
| 777 | struct acpi_power_resource *r; |
| 778 | |
| 779 | list_for_each_entry(r, &acpi_power_resource_list, list_node) |
| 780 | if (r->order > resource->order) { |
| 781 | list_add_tail(&resource->list_node, &r->list_node); |
| 782 | goto out; |
| 783 | } |
| 784 | } |
| 785 | list_add_tail(&resource->list_node, &acpi_power_resource_list); |
| 786 | |
| 787 | out: |
| 788 | mutex_unlock(&power_resource_list_lock); |
| 789 | } |
| 790 | |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 791 | int acpi_add_power_resource(acpi_handle handle) |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 792 | { |
| 793 | struct acpi_power_resource *resource; |
| 794 | struct acpi_device *device = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 795 | union acpi_object acpi_object; |
| 796 | struct acpi_buffer buffer = { sizeof(acpi_object), &acpi_object }; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 797 | acpi_status status; |
| 798 | int state, result = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 800 | acpi_bus_get_device(handle, &device); |
| 801 | if (device) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 802 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 803 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 804 | resource = kzalloc(sizeof(*resource), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 805 | if (!resource) |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 806 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 808 | device = &resource->device; |
| 809 | acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER, |
| 810 | ACPI_STA_DEFAULT); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 811 | mutex_init(&resource->resource_lock); |
Rafael J. Wysocki | 6ee22e9d | 2013-06-19 00:44:45 +0200 | [diff] [blame] | 812 | INIT_LIST_HEAD(&resource->list_node); |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 813 | resource->name = device->pnp.bus_id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 814 | strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME); |
| 815 | strcpy(acpi_device_class(device), ACPI_POWER_CLASS); |
Rafael J. Wysocki | 722c929 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 816 | device->power.state = ACPI_STATE_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 817 | |
| 818 | /* Evalute the object to get the system level and resource order. */ |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 819 | status = acpi_evaluate_object(handle, NULL, NULL, &buffer); |
| 820 | if (ACPI_FAILURE(status)) |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 821 | goto err; |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 822 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 823 | resource->system_level = acpi_object.power_resource.system_level; |
| 824 | resource->order = acpi_object.power_resource.resource_order; |
| 825 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 826 | result = acpi_power_get_state(handle, &state); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | if (result) |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 828 | goto err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 830 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", acpi_device_name(device), |
Alexey Starikovskiy | c35923b | 2007-10-22 14:19:09 +0400 | [diff] [blame] | 831 | acpi_device_bid(device), state ? "on" : "off"); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 832 | |
Rafael J. Wysocki | 82c7d5e | 2013-01-17 14:11:05 +0100 | [diff] [blame] | 833 | device->flags.match_driver = true; |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 834 | result = acpi_device_add(device, acpi_release_power_resource); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 835 | if (result) |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 836 | goto err; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 837 | |
Rafael J. Wysocki | b1c0f99 | 2013-01-24 12:50:09 +0100 | [diff] [blame] | 838 | if (!device_create_file(&device->dev, &dev_attr_resource_in_use)) |
| 839 | device->remove = acpi_power_sysfs_remove; |
| 840 | |
Rafael J. Wysocki | d5eefa8 | 2015-05-21 04:19:49 +0200 | [diff] [blame] | 841 | acpi_power_add_resource_to_list(resource); |
Rafael J. Wysocki | cf860be | 2013-01-24 12:49:49 +0100 | [diff] [blame] | 842 | acpi_device_add_finalize(device); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 843 | return 0; |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 844 | |
| 845 | err: |
| 846 | acpi_release_power_resource(&device->dev); |
Rafael J. Wysocki | e88c9c6 | 2013-01-17 14:11:07 +0100 | [diff] [blame] | 847 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | } |
| 849 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 850 | #ifdef CONFIG_ACPI_SLEEP |
| 851 | void acpi_resume_power_resources(void) |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 852 | { |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 853 | struct acpi_power_resource *resource; |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 854 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 855 | mutex_lock(&power_resource_list_lock); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 856 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 857 | list_for_each_entry(resource, &acpi_power_resource_list, list_node) { |
| 858 | int result, state; |
Rafael J. Wysocki | 3e384ee | 2010-10-22 02:35:54 +0200 | [diff] [blame] | 859 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 860 | mutex_lock(&resource->resource_lock); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 861 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 862 | result = acpi_power_get_state(resource->device.handle, &state); |
Lan Tianyu | d7d4901 | 2013-10-15 19:48:11 +0800 | [diff] [blame] | 863 | if (result) { |
| 864 | mutex_unlock(&resource->resource_lock); |
Rafael J. Wysocki | 660b111 | 2013-01-25 21:51:57 +0100 | [diff] [blame] | 865 | continue; |
Lan Tianyu | d7d4901 | 2013-10-15 19:48:11 +0800 | [diff] [blame] | 866 | } |
Rafael J. Wysocki | 660b111 | 2013-01-25 21:51:57 +0100 | [diff] [blame] | 867 | |
| 868 | if (state == ACPI_POWER_RESOURCE_STATE_OFF |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 869 | && resource->ref_count) { |
| 870 | dev_info(&resource->device.dev, "Turning ON\n"); |
| 871 | __acpi_power_on(resource); |
Rafael J. Wysocki | d5eefa8 | 2015-05-21 04:19:49 +0200 | [diff] [blame] | 872 | } |
| 873 | |
| 874 | mutex_unlock(&resource->resource_lock); |
| 875 | } |
Hans de Goede | 8ece1d8 | 2017-04-30 22:54:16 +0200 | [diff] [blame] | 876 | |
| 877 | mutex_unlock(&power_resource_list_lock); |
| 878 | } |
| 879 | |
| 880 | void acpi_turn_off_unused_power_resources(void) |
| 881 | { |
| 882 | struct acpi_power_resource *resource; |
| 883 | |
| 884 | mutex_lock(&power_resource_list_lock); |
| 885 | |
Rafael J. Wysocki | d5eefa8 | 2015-05-21 04:19:49 +0200 | [diff] [blame] | 886 | list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) { |
| 887 | int result, state; |
| 888 | |
| 889 | mutex_lock(&resource->resource_lock); |
| 890 | |
| 891 | result = acpi_power_get_state(resource->device.handle, &state); |
| 892 | if (result) { |
| 893 | mutex_unlock(&resource->resource_lock); |
| 894 | continue; |
| 895 | } |
| 896 | |
| 897 | if (state == ACPI_POWER_RESOURCE_STATE_ON |
Rafael J. Wysocki | 660b111 | 2013-01-25 21:51:57 +0100 | [diff] [blame] | 898 | && !resource->ref_count) { |
| 899 | dev_info(&resource->device.dev, "Turning OFF\n"); |
| 900 | __acpi_power_off(resource); |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 901 | } |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 902 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 903 | mutex_unlock(&resource->resource_lock); |
| 904 | } |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 905 | |
Rafael J. Wysocki | 781d737 | 2013-01-17 14:11:06 +0100 | [diff] [blame] | 906 | mutex_unlock(&power_resource_list_lock); |
Konstantin Karasyov | 0a61390 | 2007-02-16 01:47:06 -0500 | [diff] [blame] | 907 | } |
Rafael J. Wysocki | 9069240 | 2012-08-09 23:00:02 +0200 | [diff] [blame] | 908 | #endif |