1ec2cd81cSRafael J. Wysocki /* 2ec2cd81cSRafael J. Wysocki * drivers/acpi/device_pm.c - ACPI device power management routines. 3ec2cd81cSRafael J. Wysocki * 4ec2cd81cSRafael J. Wysocki * Copyright (C) 2012, Intel Corp. 5ec2cd81cSRafael J. Wysocki * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 6ec2cd81cSRafael J. Wysocki * 7ec2cd81cSRafael J. Wysocki * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8ec2cd81cSRafael J. Wysocki * 9ec2cd81cSRafael J. Wysocki * This program is free software; you can redistribute it and/or modify 10ec2cd81cSRafael J. Wysocki * it under the terms of the GNU General Public License version 2 as published 11ec2cd81cSRafael J. Wysocki * by the Free Software Foundation. 12ec2cd81cSRafael J. Wysocki * 13ec2cd81cSRafael J. Wysocki * This program is distributed in the hope that it will be useful, but 14ec2cd81cSRafael J. Wysocki * WITHOUT ANY WARRANTY; without even the implied warranty of 15ec2cd81cSRafael J. Wysocki * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16ec2cd81cSRafael J. Wysocki * General Public License for more details. 17ec2cd81cSRafael J. Wysocki * 18ec2cd81cSRafael J. Wysocki * You should have received a copy of the GNU General Public License along 19ec2cd81cSRafael J. Wysocki * with this program; if not, write to the Free Software Foundation, Inc., 20ec2cd81cSRafael J. Wysocki * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21ec2cd81cSRafael J. Wysocki * 22ec2cd81cSRafael J. Wysocki * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23ec2cd81cSRafael J. Wysocki */ 24ec2cd81cSRafael J. Wysocki 25ec2cd81cSRafael J. Wysocki #include <linux/device.h> 2686b3832cSRafael J. Wysocki #include <linux/export.h> 27ec2cd81cSRafael J. Wysocki #include <linux/mutex.h> 2886b3832cSRafael J. Wysocki #include <linux/pm_qos.h> 29cd7bd02dSRafael J. Wysocki #include <linux/pm_runtime.h> 30ec2cd81cSRafael J. Wysocki 31ec2cd81cSRafael J. Wysocki #include <acpi/acpi.h> 32ec2cd81cSRafael J. Wysocki #include <acpi/acpi_bus.h> 33ec2cd81cSRafael J. Wysocki 34ec2cd81cSRafael J. Wysocki static DEFINE_MUTEX(acpi_pm_notifier_lock); 35ec2cd81cSRafael J. Wysocki 36ec2cd81cSRafael J. Wysocki /** 37ec2cd81cSRafael J. Wysocki * acpi_add_pm_notifier - Register PM notifier for given ACPI device. 38ec2cd81cSRafael J. Wysocki * @adev: ACPI device to add the notifier for. 39ec2cd81cSRafael J. Wysocki * @context: Context information to pass to the notifier routine. 40ec2cd81cSRafael J. Wysocki * 41ec2cd81cSRafael J. Wysocki * NOTE: @adev need not be a run-wake or wakeup device to be a valid source of 42ec2cd81cSRafael J. Wysocki * PM wakeup events. For example, wakeup events may be generated for bridges 43ec2cd81cSRafael J. Wysocki * if one of the devices below the bridge is signaling wakeup, even if the 44ec2cd81cSRafael J. Wysocki * bridge itself doesn't have a wakeup GPE associated with it. 45ec2cd81cSRafael J. Wysocki */ 46ec2cd81cSRafael J. Wysocki acpi_status acpi_add_pm_notifier(struct acpi_device *adev, 47ec2cd81cSRafael J. Wysocki acpi_notify_handler handler, void *context) 48ec2cd81cSRafael J. Wysocki { 49ec2cd81cSRafael J. Wysocki acpi_status status = AE_ALREADY_EXISTS; 50ec2cd81cSRafael J. Wysocki 51ec2cd81cSRafael J. Wysocki mutex_lock(&acpi_pm_notifier_lock); 52ec2cd81cSRafael J. Wysocki 53ec2cd81cSRafael J. Wysocki if (adev->wakeup.flags.notifier_present) 54ec2cd81cSRafael J. Wysocki goto out; 55ec2cd81cSRafael J. Wysocki 56ec2cd81cSRafael J. Wysocki status = acpi_install_notify_handler(adev->handle, 57ec2cd81cSRafael J. Wysocki ACPI_SYSTEM_NOTIFY, 58ec2cd81cSRafael J. Wysocki handler, context); 59ec2cd81cSRafael J. Wysocki if (ACPI_FAILURE(status)) 60ec2cd81cSRafael J. Wysocki goto out; 61ec2cd81cSRafael J. Wysocki 62ec2cd81cSRafael J. Wysocki adev->wakeup.flags.notifier_present = true; 63ec2cd81cSRafael J. Wysocki 64ec2cd81cSRafael J. Wysocki out: 65ec2cd81cSRafael J. Wysocki mutex_unlock(&acpi_pm_notifier_lock); 66ec2cd81cSRafael J. Wysocki return status; 67ec2cd81cSRafael J. Wysocki } 68ec2cd81cSRafael J. Wysocki 69ec2cd81cSRafael J. Wysocki /** 70ec2cd81cSRafael J. Wysocki * acpi_remove_pm_notifier - Unregister PM notifier from given ACPI device. 71ec2cd81cSRafael J. Wysocki * @adev: ACPI device to remove the notifier from. 72ec2cd81cSRafael J. Wysocki */ 73ec2cd81cSRafael J. Wysocki acpi_status acpi_remove_pm_notifier(struct acpi_device *adev, 74ec2cd81cSRafael J. Wysocki acpi_notify_handler handler) 75ec2cd81cSRafael J. Wysocki { 76ec2cd81cSRafael J. Wysocki acpi_status status = AE_BAD_PARAMETER; 77ec2cd81cSRafael J. Wysocki 78ec2cd81cSRafael J. Wysocki mutex_lock(&acpi_pm_notifier_lock); 79ec2cd81cSRafael J. Wysocki 80ec2cd81cSRafael J. Wysocki if (!adev->wakeup.flags.notifier_present) 81ec2cd81cSRafael J. Wysocki goto out; 82ec2cd81cSRafael J. Wysocki 83ec2cd81cSRafael J. Wysocki status = acpi_remove_notify_handler(adev->handle, 84ec2cd81cSRafael J. Wysocki ACPI_SYSTEM_NOTIFY, 85ec2cd81cSRafael J. Wysocki handler); 86ec2cd81cSRafael J. Wysocki if (ACPI_FAILURE(status)) 87ec2cd81cSRafael J. Wysocki goto out; 88ec2cd81cSRafael J. Wysocki 89ec2cd81cSRafael J. Wysocki adev->wakeup.flags.notifier_present = false; 90ec2cd81cSRafael J. Wysocki 91ec2cd81cSRafael J. Wysocki out: 92ec2cd81cSRafael J. Wysocki mutex_unlock(&acpi_pm_notifier_lock); 93ec2cd81cSRafael J. Wysocki return status; 94ec2cd81cSRafael J. Wysocki } 9586b3832cSRafael J. Wysocki 9686b3832cSRafael J. Wysocki /** 9786b3832cSRafael J. Wysocki * acpi_device_power_state - Get preferred power state of ACPI device. 9886b3832cSRafael J. Wysocki * @dev: Device whose preferred target power state to return. 9986b3832cSRafael J. Wysocki * @adev: ACPI device node corresponding to @dev. 10086b3832cSRafael J. Wysocki * @target_state: System state to match the resultant device state. 10186b3832cSRafael J. Wysocki * @d_max_in: Deepest low-power state to take into consideration. 10286b3832cSRafael J. Wysocki * @d_min_p: Location to store the upper limit of the allowed states range. 10386b3832cSRafael J. Wysocki * Return value: Preferred power state of the device on success, -ENODEV 10486b3832cSRafael J. Wysocki * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure 10586b3832cSRafael J. Wysocki * 10686b3832cSRafael J. Wysocki * Find the lowest power (highest number) ACPI device power state that the 10786b3832cSRafael J. Wysocki * device can be in while the system is in the state represented by 10886b3832cSRafael J. Wysocki * @target_state. If @d_min_p is set, the highest power (lowest number) device 10986b3832cSRafael J. Wysocki * power state that @dev can be in for the given system sleep state is stored 11086b3832cSRafael J. Wysocki * at the location pointed to by it. 11186b3832cSRafael J. Wysocki * 11286b3832cSRafael J. Wysocki * Callers must ensure that @dev and @adev are valid pointers and that @adev 11386b3832cSRafael J. Wysocki * actually corresponds to @dev before using this function. 11486b3832cSRafael J. Wysocki */ 11586b3832cSRafael J. Wysocki int acpi_device_power_state(struct device *dev, struct acpi_device *adev, 11686b3832cSRafael J. Wysocki u32 target_state, int d_max_in, int *d_min_p) 11786b3832cSRafael J. Wysocki { 11886b3832cSRafael J. Wysocki char acpi_method[] = "_SxD"; 11986b3832cSRafael J. Wysocki unsigned long long d_min, d_max; 12086b3832cSRafael J. Wysocki bool wakeup = false; 12186b3832cSRafael J. Wysocki 12286b3832cSRafael J. Wysocki if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3) 12386b3832cSRafael J. Wysocki return -EINVAL; 12486b3832cSRafael J. Wysocki 12586b3832cSRafael J. Wysocki if (d_max_in > ACPI_STATE_D3_HOT) { 12686b3832cSRafael J. Wysocki enum pm_qos_flags_status stat; 12786b3832cSRafael J. Wysocki 12886b3832cSRafael J. Wysocki stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF); 12986b3832cSRafael J. Wysocki if (stat == PM_QOS_FLAGS_ALL) 13086b3832cSRafael J. Wysocki d_max_in = ACPI_STATE_D3_HOT; 13186b3832cSRafael J. Wysocki } 13286b3832cSRafael J. Wysocki 13386b3832cSRafael J. Wysocki acpi_method[2] = '0' + target_state; 13486b3832cSRafael J. Wysocki /* 13586b3832cSRafael J. Wysocki * If the sleep state is S0, the lowest limit from ACPI is D3, 13686b3832cSRafael J. Wysocki * but if the device has _S0W, we will use the value from _S0W 13786b3832cSRafael J. Wysocki * as the lowest limit from ACPI. Finally, we will constrain 13886b3832cSRafael J. Wysocki * the lowest limit with the specified one. 13986b3832cSRafael J. Wysocki */ 14086b3832cSRafael J. Wysocki d_min = ACPI_STATE_D0; 14186b3832cSRafael J. Wysocki d_max = ACPI_STATE_D3; 14286b3832cSRafael J. Wysocki 14386b3832cSRafael J. Wysocki /* 14486b3832cSRafael J. Wysocki * If present, _SxD methods return the minimum D-state (highest power 14586b3832cSRafael J. Wysocki * state) we can use for the corresponding S-states. Otherwise, the 14686b3832cSRafael J. Wysocki * minimum D-state is D0 (ACPI 3.x). 14786b3832cSRafael J. Wysocki * 14886b3832cSRafael J. Wysocki * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer 14986b3832cSRafael J. Wysocki * provided -- that's our fault recovery, we ignore retval. 15086b3832cSRafael J. Wysocki */ 15186b3832cSRafael J. Wysocki if (target_state > ACPI_STATE_S0) { 15286b3832cSRafael J. Wysocki acpi_evaluate_integer(adev->handle, acpi_method, NULL, &d_min); 15386b3832cSRafael J. Wysocki wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid 15486b3832cSRafael J. Wysocki && adev->wakeup.sleep_state >= target_state; 15586b3832cSRafael J. Wysocki } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) != 15686b3832cSRafael J. Wysocki PM_QOS_FLAGS_NONE) { 15786b3832cSRafael J. Wysocki wakeup = adev->wakeup.flags.valid; 15886b3832cSRafael J. Wysocki } 15986b3832cSRafael J. Wysocki 16086b3832cSRafael J. Wysocki /* 16186b3832cSRafael J. Wysocki * If _PRW says we can wake up the system from the target sleep state, 16286b3832cSRafael J. Wysocki * the D-state returned by _SxD is sufficient for that (we assume a 16386b3832cSRafael J. Wysocki * wakeup-aware driver if wake is set). Still, if _SxW exists 16486b3832cSRafael J. Wysocki * (ACPI 3.x), it should return the maximum (lowest power) D-state that 16586b3832cSRafael J. Wysocki * can wake the system. _S0W may be valid, too. 16686b3832cSRafael J. Wysocki */ 16786b3832cSRafael J. Wysocki if (wakeup) { 16886b3832cSRafael J. Wysocki acpi_status status; 16986b3832cSRafael J. Wysocki 17086b3832cSRafael J. Wysocki acpi_method[3] = 'W'; 17186b3832cSRafael J. Wysocki status = acpi_evaluate_integer(adev->handle, acpi_method, NULL, 17286b3832cSRafael J. Wysocki &d_max); 17386b3832cSRafael J. Wysocki if (ACPI_FAILURE(status)) { 17486b3832cSRafael J. Wysocki if (target_state != ACPI_STATE_S0 || 17586b3832cSRafael J. Wysocki status != AE_NOT_FOUND) 17686b3832cSRafael J. Wysocki d_max = d_min; 17786b3832cSRafael J. Wysocki } else if (d_max < d_min) { 17886b3832cSRafael J. Wysocki /* Warn the user of the broken DSDT */ 17986b3832cSRafael J. Wysocki printk(KERN_WARNING "ACPI: Wrong value from %s\n", 18086b3832cSRafael J. Wysocki acpi_method); 18186b3832cSRafael J. Wysocki /* Sanitize it */ 18286b3832cSRafael J. Wysocki d_min = d_max; 18386b3832cSRafael J. Wysocki } 18486b3832cSRafael J. Wysocki } 18586b3832cSRafael J. Wysocki 18686b3832cSRafael J. Wysocki if (d_max_in < d_min) 18786b3832cSRafael J. Wysocki return -EINVAL; 18886b3832cSRafael J. Wysocki if (d_min_p) 18986b3832cSRafael J. Wysocki *d_min_p = d_min; 19086b3832cSRafael J. Wysocki /* constrain d_max with specified lowest limit (max number) */ 19186b3832cSRafael J. Wysocki if (d_max > d_max_in) { 19286b3832cSRafael J. Wysocki for (d_max = d_max_in; d_max > d_min; d_max--) { 19386b3832cSRafael J. Wysocki if (adev->power.states[d_max].flags.valid) 19486b3832cSRafael J. Wysocki break; 19586b3832cSRafael J. Wysocki } 19686b3832cSRafael J. Wysocki } 19786b3832cSRafael J. Wysocki return d_max; 19886b3832cSRafael J. Wysocki } 19986b3832cSRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_device_power_state); 200cd7bd02dSRafael J. Wysocki 201a6ae7594SRafael J. Wysocki /** 202a6ae7594SRafael J. Wysocki * acpi_pm_device_sleep_state - Get preferred power state of ACPI device. 203a6ae7594SRafael J. Wysocki * @dev: Device whose preferred target power state to return. 204a6ae7594SRafael J. Wysocki * @d_min_p: Location to store the upper limit of the allowed states range. 205a6ae7594SRafael J. Wysocki * @d_max_in: Deepest low-power state to take into consideration. 206a6ae7594SRafael J. Wysocki * Return value: Preferred power state of the device on success, -ENODEV 207a6ae7594SRafael J. Wysocki * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure 208a6ae7594SRafael J. Wysocki * 209a6ae7594SRafael J. Wysocki * The caller must ensure that @dev is valid before using this function. 210a6ae7594SRafael J. Wysocki */ 211a6ae7594SRafael J. Wysocki int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in) 212a6ae7594SRafael J. Wysocki { 213a6ae7594SRafael J. Wysocki acpi_handle handle = DEVICE_ACPI_HANDLE(dev); 214a6ae7594SRafael J. Wysocki struct acpi_device *adev; 215a6ae7594SRafael J. Wysocki 216a6ae7594SRafael J. Wysocki if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { 217a6ae7594SRafael J. Wysocki dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); 218a6ae7594SRafael J. Wysocki return -ENODEV; 219a6ae7594SRafael J. Wysocki } 220a6ae7594SRafael J. Wysocki 221a6ae7594SRafael J. Wysocki return acpi_device_power_state(dev, adev, acpi_target_system_state(), 222a6ae7594SRafael J. Wysocki d_max_in, d_min_p); 223a6ae7594SRafael J. Wysocki } 224a6ae7594SRafael J. Wysocki EXPORT_SYMBOL(acpi_pm_device_sleep_state); 225a6ae7594SRafael J. Wysocki 226cd7bd02dSRafael J. Wysocki #ifdef CONFIG_PM_RUNTIME 227cd7bd02dSRafael J. Wysocki /** 228e5cc8ef3SRafael J. Wysocki * acpi_wakeup_device - Wakeup notification handler for ACPI devices. 229e5cc8ef3SRafael J. Wysocki * @handle: ACPI handle of the device the notification is for. 230e5cc8ef3SRafael J. Wysocki * @event: Type of the signaled event. 231e5cc8ef3SRafael J. Wysocki * @context: Device corresponding to @handle. 232e5cc8ef3SRafael J. Wysocki */ 233e5cc8ef3SRafael J. Wysocki static void acpi_wakeup_device(acpi_handle handle, u32 event, void *context) 234e5cc8ef3SRafael J. Wysocki { 235e5cc8ef3SRafael J. Wysocki struct device *dev = context; 236e5cc8ef3SRafael J. Wysocki 237e5cc8ef3SRafael J. Wysocki if (event == ACPI_NOTIFY_DEVICE_WAKE && dev) { 238e5cc8ef3SRafael J. Wysocki pm_wakeup_event(dev, 0); 239e5cc8ef3SRafael J. Wysocki pm_runtime_resume(dev); 240e5cc8ef3SRafael J. Wysocki } 241e5cc8ef3SRafael J. Wysocki } 242e5cc8ef3SRafael J. Wysocki 243e5cc8ef3SRafael J. Wysocki /** 244dee8370cSRafael J. Wysocki * __acpi_device_run_wake - Enable/disable runtime remote wakeup for device. 245dee8370cSRafael J. Wysocki * @adev: ACPI device to enable/disable the remote wakeup for. 246cd7bd02dSRafael J. Wysocki * @enable: Whether to enable or disable the wakeup functionality. 247cd7bd02dSRafael J. Wysocki * 248dee8370cSRafael J. Wysocki * Enable/disable the GPE associated with @adev so that it can generate 249dee8370cSRafael J. Wysocki * wakeup signals for the device in response to external (remote) events and 250dee8370cSRafael J. Wysocki * enable/disable device wakeup power. 251dee8370cSRafael J. Wysocki * 252dee8370cSRafael J. Wysocki * Callers must ensure that @adev is a valid ACPI device node before executing 253dee8370cSRafael J. Wysocki * this function. 254dee8370cSRafael J. Wysocki */ 255dee8370cSRafael J. Wysocki int __acpi_device_run_wake(struct acpi_device *adev, bool enable) 256dee8370cSRafael J. Wysocki { 257dee8370cSRafael J. Wysocki struct acpi_device_wakeup *wakeup = &adev->wakeup; 258dee8370cSRafael J. Wysocki 259dee8370cSRafael J. Wysocki if (enable) { 260dee8370cSRafael J. Wysocki acpi_status res; 261dee8370cSRafael J. Wysocki int error; 262dee8370cSRafael J. Wysocki 263dee8370cSRafael J. Wysocki error = acpi_enable_wakeup_device_power(adev, ACPI_STATE_S0); 264dee8370cSRafael J. Wysocki if (error) 265dee8370cSRafael J. Wysocki return error; 266dee8370cSRafael J. Wysocki 267dee8370cSRafael J. Wysocki res = acpi_enable_gpe(wakeup->gpe_device, wakeup->gpe_number); 268dee8370cSRafael J. Wysocki if (ACPI_FAILURE(res)) { 269dee8370cSRafael J. Wysocki acpi_disable_wakeup_device_power(adev); 270dee8370cSRafael J. Wysocki return -EIO; 271dee8370cSRafael J. Wysocki } 272dee8370cSRafael J. Wysocki } else { 273dee8370cSRafael J. Wysocki acpi_disable_gpe(wakeup->gpe_device, wakeup->gpe_number); 274dee8370cSRafael J. Wysocki acpi_disable_wakeup_device_power(adev); 275dee8370cSRafael J. Wysocki } 276dee8370cSRafael J. Wysocki return 0; 277dee8370cSRafael J. Wysocki } 278dee8370cSRafael J. Wysocki 279dee8370cSRafael J. Wysocki /** 280dee8370cSRafael J. Wysocki * acpi_pm_device_run_wake - Enable/disable remote wakeup for given device. 281dee8370cSRafael J. Wysocki * @dev: Device to enable/disable the platform to wake up. 282dee8370cSRafael J. Wysocki * @enable: Whether to enable or disable the wakeup functionality. 283cd7bd02dSRafael J. Wysocki */ 284cd7bd02dSRafael J. Wysocki int acpi_pm_device_run_wake(struct device *phys_dev, bool enable) 285cd7bd02dSRafael J. Wysocki { 286dee8370cSRafael J. Wysocki struct acpi_device *adev; 287cd7bd02dSRafael J. Wysocki acpi_handle handle; 288cd7bd02dSRafael J. Wysocki 289cd7bd02dSRafael J. Wysocki if (!device_run_wake(phys_dev)) 290cd7bd02dSRafael J. Wysocki return -EINVAL; 291cd7bd02dSRafael J. Wysocki 292cd7bd02dSRafael J. Wysocki handle = DEVICE_ACPI_HANDLE(phys_dev); 293dee8370cSRafael J. Wysocki if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { 294dee8370cSRafael J. Wysocki dev_dbg(phys_dev, "ACPI handle without context in %s!\n", 295cd7bd02dSRafael J. Wysocki __func__); 296cd7bd02dSRafael J. Wysocki return -ENODEV; 297cd7bd02dSRafael J. Wysocki } 298cd7bd02dSRafael J. Wysocki 299dee8370cSRafael J. Wysocki return __acpi_device_run_wake(adev, enable); 300cd7bd02dSRafael J. Wysocki } 301cd7bd02dSRafael J. Wysocki EXPORT_SYMBOL(acpi_pm_device_run_wake); 302e5cc8ef3SRafael J. Wysocki #else 303e5cc8ef3SRafael J. Wysocki static inline void acpi_wakeup_device(acpi_handle handle, u32 event, 304e5cc8ef3SRafael J. Wysocki void *context) {} 305cd7bd02dSRafael J. Wysocki #endif /* CONFIG_PM_RUNTIME */ 306dee8370cSRafael J. Wysocki 307dee8370cSRafael J. Wysocki #ifdef CONFIG_PM_SLEEP 308dee8370cSRafael J. Wysocki /** 309dee8370cSRafael J. Wysocki * __acpi_device_sleep_wake - Enable or disable device to wake up the system. 310dee8370cSRafael J. Wysocki * @dev: Device to enable/desible to wake up the system. 311dee8370cSRafael J. Wysocki * @target_state: System state the device is supposed to wake up from. 312dee8370cSRafael J. Wysocki * @enable: Whether to enable or disable @dev to wake up the system. 313dee8370cSRafael J. Wysocki */ 314dee8370cSRafael J. Wysocki int __acpi_device_sleep_wake(struct acpi_device *adev, u32 target_state, 315dee8370cSRafael J. Wysocki bool enable) 316dee8370cSRafael J. Wysocki { 317dee8370cSRafael J. Wysocki return enable ? 318dee8370cSRafael J. Wysocki acpi_enable_wakeup_device_power(adev, target_state) : 319dee8370cSRafael J. Wysocki acpi_disable_wakeup_device_power(adev); 320dee8370cSRafael J. Wysocki } 321a6ae7594SRafael J. Wysocki 322a6ae7594SRafael J. Wysocki /** 323a6ae7594SRafael J. Wysocki * acpi_pm_device_sleep_wake - Enable or disable device to wake up the system. 324a6ae7594SRafael J. Wysocki * @dev: Device to enable/desible to wake up the system from sleep states. 325a6ae7594SRafael J. Wysocki * @enable: Whether to enable or disable @dev to wake up the system. 326a6ae7594SRafael J. Wysocki */ 327a6ae7594SRafael J. Wysocki int acpi_pm_device_sleep_wake(struct device *dev, bool enable) 328a6ae7594SRafael J. Wysocki { 329a6ae7594SRafael J. Wysocki acpi_handle handle; 330a6ae7594SRafael J. Wysocki struct acpi_device *adev; 331a6ae7594SRafael J. Wysocki int error; 332a6ae7594SRafael J. Wysocki 333a6ae7594SRafael J. Wysocki if (!device_can_wakeup(dev)) 334a6ae7594SRafael J. Wysocki return -EINVAL; 335a6ae7594SRafael J. Wysocki 336a6ae7594SRafael J. Wysocki handle = DEVICE_ACPI_HANDLE(dev); 337a6ae7594SRafael J. Wysocki if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) { 338a6ae7594SRafael J. Wysocki dev_dbg(dev, "ACPI handle without context in %s!\n", __func__); 339a6ae7594SRafael J. Wysocki return -ENODEV; 340a6ae7594SRafael J. Wysocki } 341a6ae7594SRafael J. Wysocki 342a6ae7594SRafael J. Wysocki error = __acpi_device_sleep_wake(adev, acpi_target_system_state(), 343a6ae7594SRafael J. Wysocki enable); 344a6ae7594SRafael J. Wysocki if (!error) 345a6ae7594SRafael J. Wysocki dev_info(dev, "System wakeup %s by ACPI\n", 346a6ae7594SRafael J. Wysocki enable ? "enabled" : "disabled"); 347a6ae7594SRafael J. Wysocki 348a6ae7594SRafael J. Wysocki return error; 349a6ae7594SRafael J. Wysocki } 350dee8370cSRafael J. Wysocki #endif /* CONFIG_PM_SLEEP */ 351e5cc8ef3SRafael J. Wysocki 352e5cc8ef3SRafael J. Wysocki /** 353e5cc8ef3SRafael J. Wysocki * acpi_dev_pm_get_node - Get ACPI device node for the given physical device. 354e5cc8ef3SRafael J. Wysocki * @dev: Device to get the ACPI node for. 355e5cc8ef3SRafael J. Wysocki */ 356e5cc8ef3SRafael J. Wysocki static struct acpi_device *acpi_dev_pm_get_node(struct device *dev) 357e5cc8ef3SRafael J. Wysocki { 358e5cc8ef3SRafael J. Wysocki acpi_handle handle = DEVICE_ACPI_HANDLE(dev); 359e5cc8ef3SRafael J. Wysocki struct acpi_device *adev; 360e5cc8ef3SRafael J. Wysocki 361*5cc36c72SRafael J. Wysocki return handle && !acpi_bus_get_device(handle, &adev) ? adev : NULL; 362e5cc8ef3SRafael J. Wysocki } 363e5cc8ef3SRafael J. Wysocki 364e5cc8ef3SRafael J. Wysocki /** 365e5cc8ef3SRafael J. Wysocki * acpi_dev_pm_low_power - Put ACPI device into a low-power state. 366e5cc8ef3SRafael J. Wysocki * @dev: Device to put into a low-power state. 367e5cc8ef3SRafael J. Wysocki * @adev: ACPI device node corresponding to @dev. 368e5cc8ef3SRafael J. Wysocki * @system_state: System state to choose the device state for. 369e5cc8ef3SRafael J. Wysocki */ 370e5cc8ef3SRafael J. Wysocki static int acpi_dev_pm_low_power(struct device *dev, struct acpi_device *adev, 371e5cc8ef3SRafael J. Wysocki u32 system_state) 372e5cc8ef3SRafael J. Wysocki { 373e5cc8ef3SRafael J. Wysocki int power_state; 374e5cc8ef3SRafael J. Wysocki 375e5cc8ef3SRafael J. Wysocki if (!acpi_device_power_manageable(adev)) 376e5cc8ef3SRafael J. Wysocki return 0; 377e5cc8ef3SRafael J. Wysocki 378e5cc8ef3SRafael J. Wysocki power_state = acpi_device_power_state(dev, adev, system_state, 379e5cc8ef3SRafael J. Wysocki ACPI_STATE_D3, NULL); 380e5cc8ef3SRafael J. Wysocki if (power_state < ACPI_STATE_D0 || power_state > ACPI_STATE_D3) 381e5cc8ef3SRafael J. Wysocki return -EIO; 382e5cc8ef3SRafael J. Wysocki 383e5cc8ef3SRafael J. Wysocki return acpi_device_set_power(adev, power_state); 384e5cc8ef3SRafael J. Wysocki } 385e5cc8ef3SRafael J. Wysocki 386e5cc8ef3SRafael J. Wysocki /** 387e5cc8ef3SRafael J. Wysocki * acpi_dev_pm_full_power - Put ACPI device into the full-power state. 388e5cc8ef3SRafael J. Wysocki * @adev: ACPI device node to put into the full-power state. 389e5cc8ef3SRafael J. Wysocki */ 390e5cc8ef3SRafael J. Wysocki static int acpi_dev_pm_full_power(struct acpi_device *adev) 391e5cc8ef3SRafael J. Wysocki { 392e5cc8ef3SRafael J. Wysocki return acpi_device_power_manageable(adev) ? 393e5cc8ef3SRafael J. Wysocki acpi_device_set_power(adev, ACPI_STATE_D0) : 0; 394e5cc8ef3SRafael J. Wysocki } 395e5cc8ef3SRafael J. Wysocki 396e5cc8ef3SRafael J. Wysocki #ifdef CONFIG_PM_RUNTIME 397e5cc8ef3SRafael J. Wysocki /** 398e5cc8ef3SRafael J. Wysocki * acpi_dev_runtime_suspend - Put device into a low-power state using ACPI. 399e5cc8ef3SRafael J. Wysocki * @dev: Device to put into a low-power state. 400e5cc8ef3SRafael J. Wysocki * 401e5cc8ef3SRafael J. Wysocki * Put the given device into a runtime low-power state using the standard ACPI 402e5cc8ef3SRafael J. Wysocki * mechanism. Set up remote wakeup if desired, choose the state to put the 403e5cc8ef3SRafael J. Wysocki * device into (this checks if remote wakeup is expected to work too), and set 404e5cc8ef3SRafael J. Wysocki * the power state of the device. 405e5cc8ef3SRafael J. Wysocki */ 406e5cc8ef3SRafael J. Wysocki int acpi_dev_runtime_suspend(struct device *dev) 407e5cc8ef3SRafael J. Wysocki { 408e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 409e5cc8ef3SRafael J. Wysocki bool remote_wakeup; 410e5cc8ef3SRafael J. Wysocki int error; 411e5cc8ef3SRafael J. Wysocki 412e5cc8ef3SRafael J. Wysocki if (!adev) 413e5cc8ef3SRafael J. Wysocki return 0; 414e5cc8ef3SRafael J. Wysocki 415e5cc8ef3SRafael J. Wysocki remote_wakeup = dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) > 416e5cc8ef3SRafael J. Wysocki PM_QOS_FLAGS_NONE; 417e5cc8ef3SRafael J. Wysocki error = __acpi_device_run_wake(adev, remote_wakeup); 418e5cc8ef3SRafael J. Wysocki if (remote_wakeup && error) 419e5cc8ef3SRafael J. Wysocki return -EAGAIN; 420e5cc8ef3SRafael J. Wysocki 421e5cc8ef3SRafael J. Wysocki error = acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); 422e5cc8ef3SRafael J. Wysocki if (error) 423e5cc8ef3SRafael J. Wysocki __acpi_device_run_wake(adev, false); 424e5cc8ef3SRafael J. Wysocki 425e5cc8ef3SRafael J. Wysocki return error; 426e5cc8ef3SRafael J. Wysocki } 427e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_runtime_suspend); 428e5cc8ef3SRafael J. Wysocki 429e5cc8ef3SRafael J. Wysocki /** 430e5cc8ef3SRafael J. Wysocki * acpi_dev_runtime_resume - Put device into the full-power state using ACPI. 431e5cc8ef3SRafael J. Wysocki * @dev: Device to put into the full-power state. 432e5cc8ef3SRafael J. Wysocki * 433e5cc8ef3SRafael J. Wysocki * Put the given device into the full-power state using the standard ACPI 434e5cc8ef3SRafael J. Wysocki * mechanism at run time. Set the power state of the device to ACPI D0 and 435e5cc8ef3SRafael J. Wysocki * disable remote wakeup. 436e5cc8ef3SRafael J. Wysocki */ 437e5cc8ef3SRafael J. Wysocki int acpi_dev_runtime_resume(struct device *dev) 438e5cc8ef3SRafael J. Wysocki { 439e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 440e5cc8ef3SRafael J. Wysocki int error; 441e5cc8ef3SRafael J. Wysocki 442e5cc8ef3SRafael J. Wysocki if (!adev) 443e5cc8ef3SRafael J. Wysocki return 0; 444e5cc8ef3SRafael J. Wysocki 445e5cc8ef3SRafael J. Wysocki error = acpi_dev_pm_full_power(adev); 446e5cc8ef3SRafael J. Wysocki __acpi_device_run_wake(adev, false); 447e5cc8ef3SRafael J. Wysocki return error; 448e5cc8ef3SRafael J. Wysocki } 449e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_runtime_resume); 450e5cc8ef3SRafael J. Wysocki 451e5cc8ef3SRafael J. Wysocki /** 452e5cc8ef3SRafael J. Wysocki * acpi_subsys_runtime_suspend - Suspend device using ACPI. 453e5cc8ef3SRafael J. Wysocki * @dev: Device to suspend. 454e5cc8ef3SRafael J. Wysocki * 455e5cc8ef3SRafael J. Wysocki * Carry out the generic runtime suspend procedure for @dev and use ACPI to put 456e5cc8ef3SRafael J. Wysocki * it into a runtime low-power state. 457e5cc8ef3SRafael J. Wysocki */ 458e5cc8ef3SRafael J. Wysocki int acpi_subsys_runtime_suspend(struct device *dev) 459e5cc8ef3SRafael J. Wysocki { 460e5cc8ef3SRafael J. Wysocki int ret = pm_generic_runtime_suspend(dev); 461e5cc8ef3SRafael J. Wysocki return ret ? ret : acpi_dev_runtime_suspend(dev); 462e5cc8ef3SRafael J. Wysocki } 463e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_subsys_runtime_suspend); 464e5cc8ef3SRafael J. Wysocki 465e5cc8ef3SRafael J. Wysocki /** 466e5cc8ef3SRafael J. Wysocki * acpi_subsys_runtime_resume - Resume device using ACPI. 467e5cc8ef3SRafael J. Wysocki * @dev: Device to Resume. 468e5cc8ef3SRafael J. Wysocki * 469e5cc8ef3SRafael J. Wysocki * Use ACPI to put the given device into the full-power state and carry out the 470e5cc8ef3SRafael J. Wysocki * generic runtime resume procedure for it. 471e5cc8ef3SRafael J. Wysocki */ 472e5cc8ef3SRafael J. Wysocki int acpi_subsys_runtime_resume(struct device *dev) 473e5cc8ef3SRafael J. Wysocki { 474e5cc8ef3SRafael J. Wysocki int ret = acpi_dev_runtime_resume(dev); 475e5cc8ef3SRafael J. Wysocki return ret ? ret : pm_generic_runtime_resume(dev); 476e5cc8ef3SRafael J. Wysocki } 477e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_subsys_runtime_resume); 478e5cc8ef3SRafael J. Wysocki #endif /* CONFIG_PM_RUNTIME */ 479e5cc8ef3SRafael J. Wysocki 480e5cc8ef3SRafael J. Wysocki #ifdef CONFIG_PM_SLEEP 481e5cc8ef3SRafael J. Wysocki /** 482e5cc8ef3SRafael J. Wysocki * acpi_dev_suspend_late - Put device into a low-power state using ACPI. 483e5cc8ef3SRafael J. Wysocki * @dev: Device to put into a low-power state. 484e5cc8ef3SRafael J. Wysocki * 485e5cc8ef3SRafael J. Wysocki * Put the given device into a low-power state during system transition to a 486e5cc8ef3SRafael J. Wysocki * sleep state using the standard ACPI mechanism. Set up system wakeup if 487e5cc8ef3SRafael J. Wysocki * desired, choose the state to put the device into (this checks if system 488e5cc8ef3SRafael J. Wysocki * wakeup is expected to work too), and set the power state of the device. 489e5cc8ef3SRafael J. Wysocki */ 490e5cc8ef3SRafael J. Wysocki int acpi_dev_suspend_late(struct device *dev) 491e5cc8ef3SRafael J. Wysocki { 492e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 493e5cc8ef3SRafael J. Wysocki u32 target_state; 494e5cc8ef3SRafael J. Wysocki bool wakeup; 495e5cc8ef3SRafael J. Wysocki int error; 496e5cc8ef3SRafael J. Wysocki 497e5cc8ef3SRafael J. Wysocki if (!adev) 498e5cc8ef3SRafael J. Wysocki return 0; 499e5cc8ef3SRafael J. Wysocki 500e5cc8ef3SRafael J. Wysocki target_state = acpi_target_system_state(); 501e5cc8ef3SRafael J. Wysocki wakeup = device_may_wakeup(dev); 502e5cc8ef3SRafael J. Wysocki error = __acpi_device_sleep_wake(adev, target_state, wakeup); 503e5cc8ef3SRafael J. Wysocki if (wakeup && error) 504e5cc8ef3SRafael J. Wysocki return error; 505e5cc8ef3SRafael J. Wysocki 506e5cc8ef3SRafael J. Wysocki error = acpi_dev_pm_low_power(dev, adev, target_state); 507e5cc8ef3SRafael J. Wysocki if (error) 508e5cc8ef3SRafael J. Wysocki __acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false); 509e5cc8ef3SRafael J. Wysocki 510e5cc8ef3SRafael J. Wysocki return error; 511e5cc8ef3SRafael J. Wysocki } 512e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_suspend_late); 513e5cc8ef3SRafael J. Wysocki 514e5cc8ef3SRafael J. Wysocki /** 515e5cc8ef3SRafael J. Wysocki * acpi_dev_resume_early - Put device into the full-power state using ACPI. 516e5cc8ef3SRafael J. Wysocki * @dev: Device to put into the full-power state. 517e5cc8ef3SRafael J. Wysocki * 518e5cc8ef3SRafael J. Wysocki * Put the given device into the full-power state using the standard ACPI 519e5cc8ef3SRafael J. Wysocki * mechanism during system transition to the working state. Set the power 520e5cc8ef3SRafael J. Wysocki * state of the device to ACPI D0 and disable remote wakeup. 521e5cc8ef3SRafael J. Wysocki */ 522e5cc8ef3SRafael J. Wysocki int acpi_dev_resume_early(struct device *dev) 523e5cc8ef3SRafael J. Wysocki { 524e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 525e5cc8ef3SRafael J. Wysocki int error; 526e5cc8ef3SRafael J. Wysocki 527e5cc8ef3SRafael J. Wysocki if (!adev) 528e5cc8ef3SRafael J. Wysocki return 0; 529e5cc8ef3SRafael J. Wysocki 530e5cc8ef3SRafael J. Wysocki error = acpi_dev_pm_full_power(adev); 531e5cc8ef3SRafael J. Wysocki __acpi_device_sleep_wake(adev, ACPI_STATE_UNKNOWN, false); 532e5cc8ef3SRafael J. Wysocki return error; 533e5cc8ef3SRafael J. Wysocki } 534e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_resume_early); 535e5cc8ef3SRafael J. Wysocki 536e5cc8ef3SRafael J. Wysocki /** 537e5cc8ef3SRafael J. Wysocki * acpi_subsys_prepare - Prepare device for system transition to a sleep state. 538e5cc8ef3SRafael J. Wysocki * @dev: Device to prepare. 539e5cc8ef3SRafael J. Wysocki */ 540e5cc8ef3SRafael J. Wysocki int acpi_subsys_prepare(struct device *dev) 541e5cc8ef3SRafael J. Wysocki { 542e5cc8ef3SRafael J. Wysocki /* 543e5cc8ef3SRafael J. Wysocki * Follow PCI and resume devices suspended at run time before running 544e5cc8ef3SRafael J. Wysocki * their system suspend callbacks. 545e5cc8ef3SRafael J. Wysocki */ 546e5cc8ef3SRafael J. Wysocki pm_runtime_resume(dev); 547e5cc8ef3SRafael J. Wysocki return pm_generic_prepare(dev); 548e5cc8ef3SRafael J. Wysocki } 549e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_subsys_prepare); 550e5cc8ef3SRafael J. Wysocki 551e5cc8ef3SRafael J. Wysocki /** 552e5cc8ef3SRafael J. Wysocki * acpi_subsys_suspend_late - Suspend device using ACPI. 553e5cc8ef3SRafael J. Wysocki * @dev: Device to suspend. 554e5cc8ef3SRafael J. Wysocki * 555e5cc8ef3SRafael J. Wysocki * Carry out the generic late suspend procedure for @dev and use ACPI to put 556e5cc8ef3SRafael J. Wysocki * it into a low-power state during system transition into a sleep state. 557e5cc8ef3SRafael J. Wysocki */ 558e5cc8ef3SRafael J. Wysocki int acpi_subsys_suspend_late(struct device *dev) 559e5cc8ef3SRafael J. Wysocki { 560e5cc8ef3SRafael J. Wysocki int ret = pm_generic_suspend_late(dev); 561e5cc8ef3SRafael J. Wysocki return ret ? ret : acpi_dev_suspend_late(dev); 562e5cc8ef3SRafael J. Wysocki } 563e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_subsys_suspend_late); 564e5cc8ef3SRafael J. Wysocki 565e5cc8ef3SRafael J. Wysocki /** 566e5cc8ef3SRafael J. Wysocki * acpi_subsys_resume_early - Resume device using ACPI. 567e5cc8ef3SRafael J. Wysocki * @dev: Device to Resume. 568e5cc8ef3SRafael J. Wysocki * 569e5cc8ef3SRafael J. Wysocki * Use ACPI to put the given device into the full-power state and carry out the 570e5cc8ef3SRafael J. Wysocki * generic early resume procedure for it during system transition into the 571e5cc8ef3SRafael J. Wysocki * working state. 572e5cc8ef3SRafael J. Wysocki */ 573e5cc8ef3SRafael J. Wysocki int acpi_subsys_resume_early(struct device *dev) 574e5cc8ef3SRafael J. Wysocki { 575e5cc8ef3SRafael J. Wysocki int ret = acpi_dev_resume_early(dev); 576e5cc8ef3SRafael J. Wysocki return ret ? ret : pm_generic_resume_early(dev); 577e5cc8ef3SRafael J. Wysocki } 578e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_subsys_resume_early); 579e5cc8ef3SRafael J. Wysocki #endif /* CONFIG_PM_SLEEP */ 580e5cc8ef3SRafael J. Wysocki 581e5cc8ef3SRafael J. Wysocki static struct dev_pm_domain acpi_general_pm_domain = { 582e5cc8ef3SRafael J. Wysocki .ops = { 583e5cc8ef3SRafael J. Wysocki #ifdef CONFIG_PM_RUNTIME 584e5cc8ef3SRafael J. Wysocki .runtime_suspend = acpi_subsys_runtime_suspend, 585e5cc8ef3SRafael J. Wysocki .runtime_resume = acpi_subsys_runtime_resume, 586e5cc8ef3SRafael J. Wysocki .runtime_idle = pm_generic_runtime_idle, 587e5cc8ef3SRafael J. Wysocki #endif 588e5cc8ef3SRafael J. Wysocki #ifdef CONFIG_PM_SLEEP 589e5cc8ef3SRafael J. Wysocki .prepare = acpi_subsys_prepare, 590e5cc8ef3SRafael J. Wysocki .suspend_late = acpi_subsys_suspend_late, 591e5cc8ef3SRafael J. Wysocki .resume_early = acpi_subsys_resume_early, 592e5cc8ef3SRafael J. Wysocki .poweroff_late = acpi_subsys_suspend_late, 593e5cc8ef3SRafael J. Wysocki .restore_early = acpi_subsys_resume_early, 594e5cc8ef3SRafael J. Wysocki #endif 595e5cc8ef3SRafael J. Wysocki }, 596e5cc8ef3SRafael J. Wysocki }; 597e5cc8ef3SRafael J. Wysocki 598e5cc8ef3SRafael J. Wysocki /** 599e5cc8ef3SRafael J. Wysocki * acpi_dev_pm_attach - Prepare device for ACPI power management. 600e5cc8ef3SRafael J. Wysocki * @dev: Device to prepare. 601b88ce2a4SRafael J. Wysocki * @power_on: Whether or not to power on the device. 602e5cc8ef3SRafael J. Wysocki * 603e5cc8ef3SRafael J. Wysocki * If @dev has a valid ACPI handle that has a valid struct acpi_device object 604e5cc8ef3SRafael J. Wysocki * attached to it, install a wakeup notification handler for the device and 605b88ce2a4SRafael J. Wysocki * add it to the general ACPI PM domain. If @power_on is set, the device will 606b88ce2a4SRafael J. Wysocki * be put into the ACPI D0 state before the function returns. 607e5cc8ef3SRafael J. Wysocki * 608e5cc8ef3SRafael J. Wysocki * This assumes that the @dev's bus type uses generic power management callbacks 609e5cc8ef3SRafael J. Wysocki * (or doesn't use any power management callbacks at all). 610e5cc8ef3SRafael J. Wysocki * 611e5cc8ef3SRafael J. Wysocki * Callers must ensure proper synchronization of this function with power 612e5cc8ef3SRafael J. Wysocki * management callbacks. 613e5cc8ef3SRafael J. Wysocki */ 614b88ce2a4SRafael J. Wysocki int acpi_dev_pm_attach(struct device *dev, bool power_on) 615e5cc8ef3SRafael J. Wysocki { 616e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 617e5cc8ef3SRafael J. Wysocki 618e5cc8ef3SRafael J. Wysocki if (!adev) 619e5cc8ef3SRafael J. Wysocki return -ENODEV; 620e5cc8ef3SRafael J. Wysocki 621e5cc8ef3SRafael J. Wysocki if (dev->pm_domain) 622e5cc8ef3SRafael J. Wysocki return -EEXIST; 623e5cc8ef3SRafael J. Wysocki 624e5cc8ef3SRafael J. Wysocki acpi_add_pm_notifier(adev, acpi_wakeup_device, dev); 625e5cc8ef3SRafael J. Wysocki dev->pm_domain = &acpi_general_pm_domain; 626b88ce2a4SRafael J. Wysocki if (power_on) { 627b88ce2a4SRafael J. Wysocki acpi_dev_pm_full_power(adev); 628b88ce2a4SRafael J. Wysocki __acpi_device_run_wake(adev, false); 629b88ce2a4SRafael J. Wysocki } 630e5cc8ef3SRafael J. Wysocki return 0; 631e5cc8ef3SRafael J. Wysocki } 632e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_pm_attach); 633e5cc8ef3SRafael J. Wysocki 634e5cc8ef3SRafael J. Wysocki /** 635e5cc8ef3SRafael J. Wysocki * acpi_dev_pm_detach - Remove ACPI power management from the device. 636e5cc8ef3SRafael J. Wysocki * @dev: Device to take care of. 637b88ce2a4SRafael J. Wysocki * @power_off: Whether or not to try to remove power from the device. 638e5cc8ef3SRafael J. Wysocki * 639e5cc8ef3SRafael J. Wysocki * Remove the device from the general ACPI PM domain and remove its wakeup 640b88ce2a4SRafael J. Wysocki * notifier. If @power_off is set, additionally remove power from the device if 641b88ce2a4SRafael J. Wysocki * possible. 642e5cc8ef3SRafael J. Wysocki * 643e5cc8ef3SRafael J. Wysocki * Callers must ensure proper synchronization of this function with power 644e5cc8ef3SRafael J. Wysocki * management callbacks. 645e5cc8ef3SRafael J. Wysocki */ 646b88ce2a4SRafael J. Wysocki void acpi_dev_pm_detach(struct device *dev, bool power_off) 647e5cc8ef3SRafael J. Wysocki { 648e5cc8ef3SRafael J. Wysocki struct acpi_device *adev = acpi_dev_pm_get_node(dev); 649e5cc8ef3SRafael J. Wysocki 650e5cc8ef3SRafael J. Wysocki if (adev && dev->pm_domain == &acpi_general_pm_domain) { 651e5cc8ef3SRafael J. Wysocki dev->pm_domain = NULL; 652e5cc8ef3SRafael J. Wysocki acpi_remove_pm_notifier(adev, acpi_wakeup_device); 653b88ce2a4SRafael J. Wysocki if (power_off) { 654b88ce2a4SRafael J. Wysocki /* 655b88ce2a4SRafael J. Wysocki * If the device's PM QoS resume latency limit or flags 656b88ce2a4SRafael J. Wysocki * have been exposed to user space, they have to be 657b88ce2a4SRafael J. Wysocki * hidden at this point, so that they don't affect the 658b88ce2a4SRafael J. Wysocki * choice of the low-power state to put the device into. 659b88ce2a4SRafael J. Wysocki */ 660b88ce2a4SRafael J. Wysocki dev_pm_qos_hide_latency_limit(dev); 661b88ce2a4SRafael J. Wysocki dev_pm_qos_hide_flags(dev); 662b88ce2a4SRafael J. Wysocki __acpi_device_run_wake(adev, false); 663b88ce2a4SRafael J. Wysocki acpi_dev_pm_low_power(dev, adev, ACPI_STATE_S0); 664b88ce2a4SRafael J. Wysocki } 665e5cc8ef3SRafael J. Wysocki } 666e5cc8ef3SRafael J. Wysocki } 667e5cc8ef3SRafael J. Wysocki EXPORT_SYMBOL_GPL(acpi_dev_pm_detach); 668