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-rw-r--r--drivers/acpi/bus.c88
-rw-r--r--drivers/acpi/power.c2
-rw-r--r--drivers/acpi/scan.c1
-rw-r--r--drivers/acpi/sleep.c49
-rw-r--r--drivers/rtc/rtc-cmos.c9
5 files changed, 110 insertions, 39 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 3188da3df8da..adceafda9c17 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -182,41 +182,66 @@ EXPORT_SYMBOL(acpi_bus_get_private_data);
Power Management
-------------------------------------------------------------------------- */
+static const char *state_string(int state)
+{
+ switch (state) {
+ case ACPI_STATE_D0:
+ return "D0";
+ case ACPI_STATE_D1:
+ return "D1";
+ case ACPI_STATE_D2:
+ return "D2";
+ case ACPI_STATE_D3_HOT:
+ return "D3hot";
+ case ACPI_STATE_D3_COLD:
+ return "D3";
+ default:
+ return "(unknown)";
+ }
+}
+
static int __acpi_bus_get_power(struct acpi_device *device, int *state)
{
- int result = 0;
- acpi_status status = 0;
- unsigned long long psc = 0;
+ int result = ACPI_STATE_UNKNOWN;
if (!device || !state)
return -EINVAL;
- *state = ACPI_STATE_UNKNOWN;
-
- if (device->flags.power_manageable) {
- /*
- * Get the device's power state either directly (via _PSC) or
- * indirectly (via power resources).
- */
- if (device->power.flags.power_resources) {
- result = acpi_power_get_inferred_state(device, state);
- if (result)
- return result;
- } else if (device->power.flags.explicit_get) {
- status = acpi_evaluate_integer(device->handle, "_PSC",
- NULL, &psc);
- if (ACPI_FAILURE(status))
- return -ENODEV;
- *state = (int)psc;
- }
- } else {
+ if (!device->flags.power_manageable) {
/* TBD: Non-recursive algorithm for walking up hierarchy. */
*state = device->parent ?
device->parent->power.state : ACPI_STATE_D0;
+ goto out;
+ }
+
+ /*
+ * Get the device's power state either directly (via _PSC) or
+ * indirectly (via power resources).
+ */
+ if (device->power.flags.explicit_get) {
+ unsigned long long psc;
+ acpi_status status = acpi_evaluate_integer(device->handle,
+ "_PSC", NULL, &psc);
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ result = psc;
+ }
+ /* The test below covers ACPI_STATE_UNKNOWN too. */
+ if (result <= ACPI_STATE_D2) {
+ ; /* Do nothing. */
+ } else if (device->power.flags.power_resources) {
+ int error = acpi_power_get_inferred_state(device, &result);
+ if (error)
+ return error;
+ } else if (result == ACPI_STATE_D3_HOT) {
+ result = ACPI_STATE_D3;
}
+ *state = result;
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
- device->pnp.bus_id, *state));
+ out:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
+ device->pnp.bus_id, state_string(*state)));
return 0;
}
@@ -234,13 +259,14 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
/* Make sure this is a valid target state */
if (state == device->power.state) {
- ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
- state));
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
+ state_string(state)));
return 0;
}
if (!device->power.states[state].flags.valid) {
- printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
+ printk(KERN_WARNING PREFIX "Device does not support %s\n",
+ state_string(state));
return -ENODEV;
}
if (device->parent && (state < device->parent->power.state)) {
@@ -294,13 +320,13 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state)
end:
if (result)
printk(KERN_WARNING PREFIX
- "Device [%s] failed to transition to D%d\n",
- device->pnp.bus_id, state);
+ "Device [%s] failed to transition to %s\n",
+ device->pnp.bus_id, state_string(state));
else {
device->power.state = state;
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Device [%s] transitioned to D%d\n",
- device->pnp.bus_id, state));
+ "Device [%s] transitioned to %s\n",
+ device->pnp.bus_id, state_string(state)));
}
return result;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 0500f719f63e..dd6d6a3c6780 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -631,7 +631,7 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
* We know a device's inferred power state when all the resources
* required for a given D-state are 'on'.
*/
- for (i = ACPI_STATE_D0; i < ACPI_STATE_D3_HOT; i++) {
+ for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) {
list = &device->power.states[i].resources;
if (list->count < 1)
continue;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 85cbfdccc97c..c8a1f3b68110 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -1567,6 +1567,7 @@ static int acpi_bus_scan_fixed(void)
ACPI_BUS_TYPE_POWER_BUTTON,
ACPI_STA_DEFAULT,
&ops);
+ device_init_wakeup(&device->dev, true);
}
if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) {
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 74ee4ab577b6..88561029cca8 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -57,6 +57,7 @@ MODULE_PARM_DESC(gts, "Enable evaluation of _GTS on suspend.");
MODULE_PARM_DESC(bfs, "Enable evaluation of _BFS on resume".);
static u8 sleep_states[ACPI_S_STATE_COUNT];
+static bool pwr_btn_event_pending;
static void acpi_sleep_tts_switch(u32 acpi_state)
{
@@ -184,6 +185,14 @@ static int acpi_pm_prepare(void)
return error;
}
+static int find_powerf_dev(struct device *dev, void *data)
+{
+ struct acpi_device *device = to_acpi_device(dev);
+ const char *hid = acpi_device_hid(device);
+
+ return !strcmp(hid, ACPI_BUTTON_HID_POWERF);
+}
+
/**
* acpi_pm_finish - Instruct the platform to leave a sleep state.
*
@@ -192,6 +201,7 @@ static int acpi_pm_prepare(void)
*/
static void acpi_pm_finish(void)
{
+ struct device *pwr_btn_dev;
u32 acpi_state = acpi_target_sleep_state;
acpi_ec_unblock_transactions();
@@ -209,6 +219,23 @@ static void acpi_pm_finish(void)
acpi_set_firmware_waking_vector((acpi_physical_address) 0);
acpi_target_sleep_state = ACPI_STATE_S0;
+
+ /* If we were woken with the fixed power button, provide a small
+ * hint to userspace in the form of a wakeup event on the fixed power
+ * button device (if it can be found).
+ *
+ * We delay the event generation til now, as the PM layer requires
+ * timekeeping to be running before we generate events. */
+ if (!pwr_btn_event_pending)
+ return;
+
+ pwr_btn_event_pending = false;
+ pwr_btn_dev = bus_find_device(&acpi_bus_type, NULL, NULL,
+ find_powerf_dev);
+ if (pwr_btn_dev) {
+ pm_wakeup_event(pwr_btn_dev, 0);
+ put_device(pwr_btn_dev);
+ }
}
/**
@@ -298,9 +325,23 @@ static int acpi_suspend_enter(suspend_state_t pm_state)
/* ACPI 3.0 specs (P62) says that it's the responsibility
* of the OSPM to clear the status bit [ implying that the
* POWER_BUTTON event should not reach userspace ]
+ *
+ * However, we do generate a small hint for userspace in the form of
+ * a wakeup event. We flag this condition for now and generate the
+ * event later, as we're currently too early in resume to be able to
+ * generate wakeup events.
*/
- if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3))
- acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+ if (ACPI_SUCCESS(status) && (acpi_state == ACPI_STATE_S3)) {
+ acpi_event_status pwr_btn_status;
+
+ acpi_get_event_status(ACPI_EVENT_POWER_BUTTON, &pwr_btn_status);
+
+ if (pwr_btn_status & ACPI_EVENT_FLAG_SET) {
+ acpi_clear_event(ACPI_EVENT_POWER_BUTTON);
+ /* Flag for later */
+ pwr_btn_event_pending = true;
+ }
+ }
/*
* Disable and clear GPE status before interrupt is enabled. Some GPEs
@@ -730,8 +771,8 @@ int acpi_pm_device_sleep_state(struct device *dev, int *d_min_p)
* can wake the system. _S0W may be valid, too.
*/
if (acpi_target_sleep_state == ACPI_STATE_S0 ||
- (device_may_wakeup(dev) &&
- adev->wakeup.sleep_state <= acpi_target_sleep_state)) {
+ (device_may_wakeup(dev) && adev->wakeup.flags.valid &&
+ adev->wakeup.sleep_state >= acpi_target_sleep_state)) {
acpi_status status;
acpi_method[3] = 'W';
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 7d5f56edb8ef..4267789ca995 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -910,14 +910,17 @@ static inline int cmos_poweroff(struct device *dev)
static u32 rtc_handler(void *context)
{
+ struct device *dev = context;
+
+ pm_wakeup_event(dev, 0);
acpi_clear_event(ACPI_EVENT_RTC);
acpi_disable_event(ACPI_EVENT_RTC, 0);
return ACPI_INTERRUPT_HANDLED;
}
-static inline void rtc_wake_setup(void)
+static inline void rtc_wake_setup(struct device *dev)
{
- acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, NULL);
+ acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev);
/*
* After the RTC handler is installed, the Fixed_RTC event should
* be disabled. Only when the RTC alarm is set will it be enabled.
@@ -950,7 +953,7 @@ cmos_wake_setup(struct device *dev)
if (acpi_disabled)
return;
- rtc_wake_setup();
+ rtc_wake_setup(dev);
acpi_rtc_info.wake_on = rtc_wake_on;
acpi_rtc_info.wake_off = rtc_wake_off;
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-24 19:52:28 +0000