#include <linux/reboot.h>
#include <linux/acpi.h>
#include <linux/module.h>
-#include <linux/pm_runtime.h>
-#include <linux/pm_qos.h>
#include <asm/io.h>
#ifdef CONFIG_ACPI_SLEEP
static u32 acpi_target_sleep_state = ACPI_STATE_S0;
+
+u32 acpi_target_system_state(void)
+{
+ return acpi_target_sleep_state;
+}
+
static bool pwr_btn_event_pending;
/*
return -EINVAL;
}
-#ifdef CONFIG_PM
-/**
- * acpi_pm_device_sleep_state - Get preferred power state of ACPI device.
- * @dev: Device whose preferred target power state to return.
- * @d_min_p: Location to store the upper limit of the allowed states range.
- * @d_max_in: Deepest low-power state to take into consideration.
- * Return value: Preferred power state of the device on success, -ENODEV
- * (if there's no 'struct acpi_device' for @dev) or -EINVAL on failure
- *
- * Find the lowest power (highest number) ACPI device power state that the
- * device can be in while the system is in the sleep state represented
- * by %acpi_target_sleep_state. If @d_min_p is set, the highest power (lowest
- * number) device power state that @dev can be in for the given system sleep
- * state is stored at the location pointed to by it.
- *
- * The caller must ensure that @dev is valid before using this function.
- */
-int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p, int d_max_in)
-{
- acpi_handle handle = DEVICE_ACPI_HANDLE(dev);
- struct acpi_device *adev;
- char acpi_method[] = "_SxD";
- unsigned long long d_min, d_max;
- bool wakeup = false;
-
- if (d_max_in < ACPI_STATE_D0 || d_max_in > ACPI_STATE_D3)
- return -EINVAL;
- if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
- printk(KERN_DEBUG "ACPI handle has no context!\n");
- return -ENODEV;
- }
- if (d_max_in > ACPI_STATE_D3_HOT) {
- enum pm_qos_flags_status stat;
-
- stat = dev_pm_qos_flags(dev, PM_QOS_FLAG_NO_POWER_OFF);
- if (stat == PM_QOS_FLAGS_ALL)
- d_max_in = ACPI_STATE_D3_HOT;
- }
-
- acpi_method[2] = '0' + acpi_target_sleep_state;
- /*
- * If the sleep state is S0, the lowest limit from ACPI is D3,
- * but if the device has _S0W, we will use the value from _S0W
- * as the lowest limit from ACPI. Finally, we will constrain
- * the lowest limit with the specified one.
- */
- d_min = ACPI_STATE_D0;
- d_max = ACPI_STATE_D3;
-
- /*
- * If present, _SxD methods return the minimum D-state (highest power
- * state) we can use for the corresponding S-states. Otherwise, the
- * minimum D-state is D0 (ACPI 3.x).
- *
- * NOTE: We rely on acpi_evaluate_integer() not clobbering the integer
- * provided -- that's our fault recovery, we ignore retval.
- */
- if (acpi_target_sleep_state > ACPI_STATE_S0) {
- acpi_evaluate_integer(handle, acpi_method, NULL, &d_min);
- wakeup = device_may_wakeup(dev) && adev->wakeup.flags.valid
- && adev->wakeup.sleep_state >= acpi_target_sleep_state;
- } else if (dev_pm_qos_flags(dev, PM_QOS_FLAG_REMOTE_WAKEUP) !=
- PM_QOS_FLAGS_NONE) {
- wakeup = adev->wakeup.flags.valid;
- }
-
- /*
- * If _PRW says we can wake up the system from the target sleep state,
- * the D-state returned by _SxD is sufficient for that (we assume a
- * wakeup-aware driver if wake is set). Still, if _SxW exists
- * (ACPI 3.x), it should return the maximum (lowest power) D-state that
- * can wake the system. _S0W may be valid, too.
- */
- if (wakeup) {
- acpi_status status;
-
- acpi_method[3] = 'W';
- status = acpi_evaluate_integer(handle, acpi_method, NULL,
- &d_max);
- if (ACPI_FAILURE(status)) {
- if (acpi_target_sleep_state != ACPI_STATE_S0 ||
- status != AE_NOT_FOUND)
- d_max = d_min;
- } else if (d_max < d_min) {
- /* Warn the user of the broken DSDT */
- printk(KERN_WARNING "ACPI: Wrong value from %s\n",
- acpi_method);
- /* Sanitize it */
- d_min = d_max;
- }
- }
-
- if (d_max_in < d_min)
- return -EINVAL;
- if (d_min_p)
- *d_min_p = d_min;
- /* constrain d_max with specified lowest limit (max number) */
- if (d_max > d_max_in) {
- for (d_max = d_max_in; d_max > d_min; d_max--) {
- if (adev->power.states[d_max].flags.valid)
- break;
- }
- }
- return d_max;
-}
-EXPORT_SYMBOL(acpi_pm_device_sleep_state);
-#endif /* CONFIG_PM */
-
-#ifdef CONFIG_PM_RUNTIME
-/**
- * acpi_pm_device_run_wake - Enable/disable remote wakeup for given device.
- * @phys_dev: Device to enable/disable the platform to wake up.
- * @enable: Whether to enable or disable the wakeup functionality.
- *
- * Find the ACPI device object corresponding to @phys_dev and try to
- * enable/disable the GPE associated with it, so that it can generate
- * wakeup signals for the device in response to external (remote) events.
- */
-int acpi_pm_device_run_wake(struct device *phys_dev, bool enable)
-{
- struct acpi_device *dev;
- acpi_handle handle;
-
- if (!device_run_wake(phys_dev))
- return -EINVAL;
-
- handle = DEVICE_ACPI_HANDLE(phys_dev);
- if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &dev))) {
- dev_dbg(phys_dev, "ACPI handle has no context in %s!\n",
- __func__);
- return -ENODEV;
- }
-
- if (enable) {
- acpi_enable_wakeup_device_power(dev, ACPI_STATE_S0);
- acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
- } else {
- acpi_disable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number);
- acpi_disable_wakeup_device_power(dev);
- }
-
- return 0;
-}
-EXPORT_SYMBOL(acpi_pm_device_run_wake);
-#endif /* CONFIG_PM_RUNTIME */
-
-#ifdef CONFIG_PM_SLEEP
-/**
- * acpi_pm_device_sleep_wake - Enable or disable device to wake up the system.
- * @dev: Device to enable/desible to wake up the system from sleep states.
- * @enable: Whether to enable or disable @dev to wake up the system.
- */
-int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
-{
- acpi_handle handle;
- struct acpi_device *adev;
- int error;
-
- if (!device_can_wakeup(dev))
- return -EINVAL;
-
- handle = DEVICE_ACPI_HANDLE(dev);
- if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
- dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
- return -ENODEV;
- }
-
- error = enable ?
- acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
- acpi_disable_wakeup_device_power(adev);
- if (!error)
- dev_info(dev, "wake-up capability %s by ACPI\n",
- enable ? "enabled" : "disabled");
-
- return error;
-}
-#endif /* CONFIG_PM_SLEEP */
-
static void acpi_power_off_prepare(void)
{
/* Prepare to power off the system */
projects / karo-tx-linux.git / blobdiff