ACPI / PM: Move device power management functions to device_pm.c
Move ACPI device power management functions from drivers/acpi/bus.c to drivers/acpi/device_pm.c. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>hifive-unleashed-5.1
parent
96bfd3cee2
commit
9ce4e60711
|
@ -178,299 +178,6 @@ int acpi_bus_get_private_data(acpi_handle handle, void **data)
|
||||||
}
|
}
|
||||||
EXPORT_SYMBOL(acpi_bus_get_private_data);
|
EXPORT_SYMBOL(acpi_bus_get_private_data);
|
||||||
|
|
||||||
/* --------------------------------------------------------------------------
|
|
||||||
Power Management
|
|
||||||
-------------------------------------------------------------------------- */
|
|
||||||
|
|
||||||
/**
|
|
||||||
* acpi_power_state_string - String representation of ACPI device power state.
|
|
||||||
* @state: ACPI device power state to return the string representation of.
|
|
||||||
*/
|
|
||||||
const char *acpi_power_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)";
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* acpi_device_get_power - Get power state of an ACPI device.
|
|
||||||
* @device: Device to get the power state of.
|
|
||||||
* @state: Place to store the power state of the device.
|
|
||||||
*
|
|
||||||
* This function does not update the device's power.state field, but it may
|
|
||||||
* update its parent's power.state field (when the parent's power state is
|
|
||||||
* unknown and the device's power state turns out to be D0).
|
|
||||||
*/
|
|
||||||
int acpi_device_get_power(struct acpi_device *device, int *state)
|
|
||||||
{
|
|
||||||
int result = ACPI_STATE_UNKNOWN;
|
|
||||||
|
|
||||||
if (!device || !state)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
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;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* If we were unsure about the device parent's power state up to this
|
|
||||||
* point, the fact that the device is in D0 implies that the parent has
|
|
||||||
* to be in D0 too.
|
|
||||||
*/
|
|
||||||
if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
|
|
||||||
&& result == ACPI_STATE_D0)
|
|
||||||
device->parent->power.state = ACPI_STATE_D0;
|
|
||||||
|
|
||||||
*state = result;
|
|
||||||
|
|
||||||
out:
|
|
||||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
|
|
||||||
device->pnp.bus_id, acpi_power_state_string(*state)));
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**
|
|
||||||
* acpi_device_set_power - Set power state of an ACPI device.
|
|
||||||
* @device: Device to set the power state of.
|
|
||||||
* @state: New power state to set.
|
|
||||||
*
|
|
||||||
* Callers must ensure that the device is power manageable before using this
|
|
||||||
* function.
|
|
||||||
*/
|
|
||||||
int acpi_device_set_power(struct acpi_device *device, int state)
|
|
||||||
{
|
|
||||||
int result = 0;
|
|
||||||
acpi_status status = AE_OK;
|
|
||||||
char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
|
|
||||||
bool cut_power = false;
|
|
||||||
|
|
||||||
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
/* Make sure this is a valid target state */
|
|
||||||
|
|
||||||
if (state == device->power.state) {
|
|
||||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
|
|
||||||
acpi_power_state_string(state)));
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (!device->power.states[state].flags.valid) {
|
|
||||||
printk(KERN_WARNING PREFIX "Device does not support %s\n",
|
|
||||||
acpi_power_state_string(state));
|
|
||||||
return -ENODEV;
|
|
||||||
}
|
|
||||||
if (device->parent && (state < device->parent->power.state)) {
|
|
||||||
printk(KERN_WARNING PREFIX
|
|
||||||
"Cannot set device to a higher-powered"
|
|
||||||
" state than parent\n");
|
|
||||||
return -ENODEV;
|
|
||||||
}
|
|
||||||
|
|
||||||
/* For D3cold we should first transition into D3hot. */
|
|
||||||
if (state == ACPI_STATE_D3_COLD
|
|
||||||
&& device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible) {
|
|
||||||
state = ACPI_STATE_D3_HOT;
|
|
||||||
object_name[3] = '3';
|
|
||||||
cut_power = true;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Transition Power
|
|
||||||
* ----------------
|
|
||||||
* On transitions to a high-powered state we first apply power (via
|
|
||||||
* power resources) then evalute _PSx. Conversly for transitions to
|
|
||||||
* a lower-powered state.
|
|
||||||
*/
|
|
||||||
if (state < device->power.state) {
|
|
||||||
if (device->power.state >= ACPI_STATE_D3_HOT &&
|
|
||||||
state != ACPI_STATE_D0) {
|
|
||||||
printk(KERN_WARNING PREFIX
|
|
||||||
"Cannot transition to non-D0 state from D3\n");
|
|
||||||
return -ENODEV;
|
|
||||||
}
|
|
||||||
if (device->power.flags.power_resources) {
|
|
||||||
result = acpi_power_transition(device, state);
|
|
||||||
if (result)
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
if (device->power.states[state].flags.explicit_set) {
|
|
||||||
status = acpi_evaluate_object(device->handle,
|
|
||||||
object_name, NULL, NULL);
|
|
||||||
if (ACPI_FAILURE(status)) {
|
|
||||||
result = -ENODEV;
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
} else {
|
|
||||||
if (device->power.states[state].flags.explicit_set) {
|
|
||||||
status = acpi_evaluate_object(device->handle,
|
|
||||||
object_name, NULL, NULL);
|
|
||||||
if (ACPI_FAILURE(status)) {
|
|
||||||
result = -ENODEV;
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
if (device->power.flags.power_resources) {
|
|
||||||
result = acpi_power_transition(device, state);
|
|
||||||
if (result)
|
|
||||||
goto end;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
if (cut_power)
|
|
||||||
result = acpi_power_transition(device, ACPI_STATE_D3_COLD);
|
|
||||||
|
|
||||||
end:
|
|
||||||
if (result)
|
|
||||||
printk(KERN_WARNING PREFIX
|
|
||||||
"Device [%s] failed to transition to %s\n",
|
|
||||||
device->pnp.bus_id,
|
|
||||||
acpi_power_state_string(state));
|
|
||||||
else {
|
|
||||||
device->power.state = state;
|
|
||||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
||||||
"Device [%s] transitioned to %s\n",
|
|
||||||
device->pnp.bus_id,
|
|
||||||
acpi_power_state_string(state)));
|
|
||||||
}
|
|
||||||
|
|
||||||
return result;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(acpi_device_set_power);
|
|
||||||
|
|
||||||
|
|
||||||
int acpi_bus_set_power(acpi_handle handle, int state)
|
|
||||||
{
|
|
||||||
struct acpi_device *device;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
result = acpi_bus_get_device(handle, &device);
|
|
||||||
if (result)
|
|
||||||
return result;
|
|
||||||
|
|
||||||
if (!device->flags.power_manageable) {
|
|
||||||
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
|
||||||
"Device [%s] is not power manageable\n",
|
|
||||||
dev_name(&device->dev)));
|
|
||||||
return -ENODEV;
|
|
||||||
}
|
|
||||||
|
|
||||||
return acpi_device_set_power(device, state);
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL(acpi_bus_set_power);
|
|
||||||
|
|
||||||
|
|
||||||
int acpi_bus_init_power(struct acpi_device *device)
|
|
||||||
{
|
|
||||||
int state;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
if (!device)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
device->power.state = ACPI_STATE_UNKNOWN;
|
|
||||||
|
|
||||||
result = acpi_device_get_power(device, &state);
|
|
||||||
if (result)
|
|
||||||
return result;
|
|
||||||
|
|
||||||
if (device->power.flags.power_resources)
|
|
||||||
result = acpi_power_on_resources(device, state);
|
|
||||||
|
|
||||||
if (!result)
|
|
||||||
device->power.state = state;
|
|
||||||
|
|
||||||
return result;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
int acpi_bus_update_power(acpi_handle handle, int *state_p)
|
|
||||||
{
|
|
||||||
struct acpi_device *device;
|
|
||||||
int state;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
result = acpi_bus_get_device(handle, &device);
|
|
||||||
if (result)
|
|
||||||
return result;
|
|
||||||
|
|
||||||
result = acpi_device_get_power(device, &state);
|
|
||||||
if (result)
|
|
||||||
return result;
|
|
||||||
|
|
||||||
result = acpi_device_set_power(device, state);
|
|
||||||
if (!result && state_p)
|
|
||||||
*state_p = state;
|
|
||||||
|
|
||||||
return result;
|
|
||||||
}
|
|
||||||
EXPORT_SYMBOL_GPL(acpi_bus_update_power);
|
|
||||||
|
|
||||||
|
|
||||||
bool acpi_bus_power_manageable(acpi_handle handle)
|
|
||||||
{
|
|
||||||
struct acpi_device *device;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
result = acpi_bus_get_device(handle, &device);
|
|
||||||
return result ? false : device->flags.power_manageable;
|
|
||||||
}
|
|
||||||
|
|
||||||
EXPORT_SYMBOL(acpi_bus_power_manageable);
|
|
||||||
|
|
||||||
bool acpi_bus_can_wakeup(acpi_handle handle)
|
|
||||||
{
|
|
||||||
struct acpi_device *device;
|
|
||||||
int result;
|
|
||||||
|
|
||||||
result = acpi_bus_get_device(handle, &device);
|
|
||||||
return result ? false : device->wakeup.flags.valid;
|
|
||||||
}
|
|
||||||
|
|
||||||
EXPORT_SYMBOL(acpi_bus_can_wakeup);
|
|
||||||
|
|
||||||
static void acpi_print_osc_error(acpi_handle handle,
|
static void acpi_print_osc_error(acpi_handle handle,
|
||||||
struct acpi_osc_context *context, char *error)
|
struct acpi_osc_context *context, char *error)
|
||||||
{
|
{
|
||||||
|
|
|
@ -30,6 +30,12 @@
|
||||||
|
|
||||||
#include <acpi/acpi.h>
|
#include <acpi/acpi.h>
|
||||||
#include <acpi/acpi_bus.h>
|
#include <acpi/acpi_bus.h>
|
||||||
|
#include <acpi/acpi_drivers.h>
|
||||||
|
|
||||||
|
#include "internal.h"
|
||||||
|
|
||||||
|
#define _COMPONENT ACPI_POWER_COMPONENT
|
||||||
|
ACPI_MODULE_NAME("device_pm");
|
||||||
|
|
||||||
static DEFINE_MUTEX(acpi_pm_notifier_lock);
|
static DEFINE_MUTEX(acpi_pm_notifier_lock);
|
||||||
|
|
||||||
|
@ -93,6 +99,288 @@ acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
|
||||||
return status;
|
return status;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_power_state_string - String representation of ACPI device power state.
|
||||||
|
* @state: ACPI device power state to return the string representation of.
|
||||||
|
*/
|
||||||
|
const char *acpi_power_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)";
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_device_get_power - Get power state of an ACPI device.
|
||||||
|
* @device: Device to get the power state of.
|
||||||
|
* @state: Place to store the power state of the device.
|
||||||
|
*
|
||||||
|
* This function does not update the device's power.state field, but it may
|
||||||
|
* update its parent's power.state field (when the parent's power state is
|
||||||
|
* unknown and the device's power state turns out to be D0).
|
||||||
|
*/
|
||||||
|
int acpi_device_get_power(struct acpi_device *device, int *state)
|
||||||
|
{
|
||||||
|
int result = ACPI_STATE_UNKNOWN;
|
||||||
|
|
||||||
|
if (!device || !state)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* If we were unsure about the device parent's power state up to this
|
||||||
|
* point, the fact that the device is in D0 implies that the parent has
|
||||||
|
* to be in D0 too.
|
||||||
|
*/
|
||||||
|
if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
|
||||||
|
&& result == ACPI_STATE_D0)
|
||||||
|
device->parent->power.state = ACPI_STATE_D0;
|
||||||
|
|
||||||
|
*state = result;
|
||||||
|
|
||||||
|
out:
|
||||||
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
|
||||||
|
device->pnp.bus_id, acpi_power_state_string(*state)));
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* acpi_device_set_power - Set power state of an ACPI device.
|
||||||
|
* @device: Device to set the power state of.
|
||||||
|
* @state: New power state to set.
|
||||||
|
*
|
||||||
|
* Callers must ensure that the device is power manageable before using this
|
||||||
|
* function.
|
||||||
|
*/
|
||||||
|
int acpi_device_set_power(struct acpi_device *device, int state)
|
||||||
|
{
|
||||||
|
int result = 0;
|
||||||
|
acpi_status status = AE_OK;
|
||||||
|
char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
|
||||||
|
bool cut_power = false;
|
||||||
|
|
||||||
|
if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
/* Make sure this is a valid target state */
|
||||||
|
|
||||||
|
if (state == device->power.state) {
|
||||||
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
|
||||||
|
acpi_power_state_string(state)));
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!device->power.states[state].flags.valid) {
|
||||||
|
printk(KERN_WARNING PREFIX "Device does not support %s\n",
|
||||||
|
acpi_power_state_string(state));
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
if (device->parent && (state < device->parent->power.state)) {
|
||||||
|
printk(KERN_WARNING PREFIX
|
||||||
|
"Cannot set device to a higher-powered"
|
||||||
|
" state than parent\n");
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* For D3cold we should first transition into D3hot. */
|
||||||
|
if (state == ACPI_STATE_D3_COLD
|
||||||
|
&& device->power.states[ACPI_STATE_D3_COLD].flags.os_accessible) {
|
||||||
|
state = ACPI_STATE_D3_HOT;
|
||||||
|
object_name[3] = '3';
|
||||||
|
cut_power = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Transition Power
|
||||||
|
* ----------------
|
||||||
|
* On transitions to a high-powered state we first apply power (via
|
||||||
|
* power resources) then evalute _PSx. Conversly for transitions to
|
||||||
|
* a lower-powered state.
|
||||||
|
*/
|
||||||
|
if (state < device->power.state) {
|
||||||
|
if (device->power.state >= ACPI_STATE_D3_HOT &&
|
||||||
|
state != ACPI_STATE_D0) {
|
||||||
|
printk(KERN_WARNING PREFIX
|
||||||
|
"Cannot transition to non-D0 state from D3\n");
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
if (device->power.flags.power_resources) {
|
||||||
|
result = acpi_power_transition(device, state);
|
||||||
|
if (result)
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
if (device->power.states[state].flags.explicit_set) {
|
||||||
|
status = acpi_evaluate_object(device->handle,
|
||||||
|
object_name, NULL, NULL);
|
||||||
|
if (ACPI_FAILURE(status)) {
|
||||||
|
result = -ENODEV;
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
if (device->power.states[state].flags.explicit_set) {
|
||||||
|
status = acpi_evaluate_object(device->handle,
|
||||||
|
object_name, NULL, NULL);
|
||||||
|
if (ACPI_FAILURE(status)) {
|
||||||
|
result = -ENODEV;
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (device->power.flags.power_resources) {
|
||||||
|
result = acpi_power_transition(device, state);
|
||||||
|
if (result)
|
||||||
|
goto end;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (cut_power)
|
||||||
|
result = acpi_power_transition(device, ACPI_STATE_D3_COLD);
|
||||||
|
|
||||||
|
end:
|
||||||
|
if (result)
|
||||||
|
printk(KERN_WARNING PREFIX
|
||||||
|
"Device [%s] failed to transition to %s\n",
|
||||||
|
device->pnp.bus_id,
|
||||||
|
acpi_power_state_string(state));
|
||||||
|
else {
|
||||||
|
device->power.state = state;
|
||||||
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||||
|
"Device [%s] transitioned to %s\n",
|
||||||
|
device->pnp.bus_id,
|
||||||
|
acpi_power_state_string(state)));
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(acpi_device_set_power);
|
||||||
|
|
||||||
|
int acpi_bus_set_power(acpi_handle handle, int state)
|
||||||
|
{
|
||||||
|
struct acpi_device *device;
|
||||||
|
int result;
|
||||||
|
|
||||||
|
result = acpi_bus_get_device(handle, &device);
|
||||||
|
if (result)
|
||||||
|
return result;
|
||||||
|
|
||||||
|
if (!device->flags.power_manageable) {
|
||||||
|
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
|
||||||
|
"Device [%s] is not power manageable\n",
|
||||||
|
dev_name(&device->dev)));
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
return acpi_device_set_power(device, state);
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(acpi_bus_set_power);
|
||||||
|
|
||||||
|
int acpi_bus_init_power(struct acpi_device *device)
|
||||||
|
{
|
||||||
|
int state;
|
||||||
|
int result;
|
||||||
|
|
||||||
|
if (!device)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
device->power.state = ACPI_STATE_UNKNOWN;
|
||||||
|
|
||||||
|
result = acpi_device_get_power(device, &state);
|
||||||
|
if (result)
|
||||||
|
return result;
|
||||||
|
|
||||||
|
if (device->power.flags.power_resources)
|
||||||
|
result = acpi_power_on_resources(device, state);
|
||||||
|
|
||||||
|
if (!result)
|
||||||
|
device->power.state = state;
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
int acpi_bus_update_power(acpi_handle handle, int *state_p)
|
||||||
|
{
|
||||||
|
struct acpi_device *device;
|
||||||
|
int state;
|
||||||
|
int result;
|
||||||
|
|
||||||
|
result = acpi_bus_get_device(handle, &device);
|
||||||
|
if (result)
|
||||||
|
return result;
|
||||||
|
|
||||||
|
result = acpi_device_get_power(device, &state);
|
||||||
|
if (result)
|
||||||
|
return result;
|
||||||
|
|
||||||
|
result = acpi_device_set_power(device, state);
|
||||||
|
if (!result && state_p)
|
||||||
|
*state_p = state;
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL_GPL(acpi_bus_update_power);
|
||||||
|
|
||||||
|
bool acpi_bus_power_manageable(acpi_handle handle)
|
||||||
|
{
|
||||||
|
struct acpi_device *device;
|
||||||
|
int result;
|
||||||
|
|
||||||
|
result = acpi_bus_get_device(handle, &device);
|
||||||
|
return result ? false : device->flags.power_manageable;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(acpi_bus_power_manageable);
|
||||||
|
|
||||||
|
bool acpi_bus_can_wakeup(acpi_handle handle)
|
||||||
|
{
|
||||||
|
struct acpi_device *device;
|
||||||
|
int result;
|
||||||
|
|
||||||
|
result = acpi_bus_get_device(handle, &device);
|
||||||
|
return result ? false : device->wakeup.flags.valid;
|
||||||
|
}
|
||||||
|
EXPORT_SYMBOL(acpi_bus_can_wakeup);
|
||||||
|
|
||||||
/**
|
/**
|
||||||
* acpi_device_power_state - Get preferred power state of ACPI device.
|
* acpi_device_power_state - Get preferred power state of ACPI device.
|
||||||
* @dev: Device whose preferred target power state to return.
|
* @dev: Device whose preferred target power state to return.
|
||||||
|
|
|
@ -61,7 +61,6 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
|
||||||
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
|
int acpi_power_get_inferred_state(struct acpi_device *device, int *state);
|
||||||
int acpi_power_on_resources(struct acpi_device *device, int state);
|
int acpi_power_on_resources(struct acpi_device *device, int state);
|
||||||
int acpi_power_transition(struct acpi_device *device, int state);
|
int acpi_power_transition(struct acpi_device *device, int state);
|
||||||
int acpi_bus_init_power(struct acpi_device *device);
|
|
||||||
|
|
||||||
int acpi_wakeup_device_init(void);
|
int acpi_wakeup_device_init(void);
|
||||||
void acpi_early_processor_set_pdc(void);
|
void acpi_early_processor_set_pdc(void);
|
||||||
|
|
|
@ -330,13 +330,51 @@ void acpi_bus_data_handler(acpi_handle handle, void *context);
|
||||||
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
|
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
|
||||||
unsigned long long *sta);
|
unsigned long long *sta);
|
||||||
int acpi_bus_get_status(struct acpi_device *device);
|
int acpi_bus_get_status(struct acpi_device *device);
|
||||||
|
|
||||||
|
#ifdef CONFIG_PM
|
||||||
int acpi_bus_set_power(acpi_handle handle, int state);
|
int acpi_bus_set_power(acpi_handle handle, int state);
|
||||||
const char *acpi_power_state_string(int state);
|
const char *acpi_power_state_string(int state);
|
||||||
int acpi_device_get_power(struct acpi_device *device, int *state);
|
int acpi_device_get_power(struct acpi_device *device, int *state);
|
||||||
int acpi_device_set_power(struct acpi_device *device, int state);
|
int acpi_device_set_power(struct acpi_device *device, int state);
|
||||||
|
int acpi_bus_init_power(struct acpi_device *device);
|
||||||
int acpi_bus_update_power(acpi_handle handle, int *state_p);
|
int acpi_bus_update_power(acpi_handle handle, int *state_p);
|
||||||
bool acpi_bus_power_manageable(acpi_handle handle);
|
bool acpi_bus_power_manageable(acpi_handle handle);
|
||||||
bool acpi_bus_can_wakeup(acpi_handle handle);
|
bool acpi_bus_can_wakeup(acpi_handle handle);
|
||||||
|
#else /* !CONFIG_PM */
|
||||||
|
static inline int acpi_bus_set_power(acpi_handle handle, int state)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline const char *acpi_power_state_string(int state)
|
||||||
|
{
|
||||||
|
return "D0";
|
||||||
|
}
|
||||||
|
static inline int acpi_device_get_power(struct acpi_device *device, int *state)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline int acpi_device_set_power(struct acpi_device *device, int state)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline int acpi_bus_init_power(struct acpi_device *device)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline int acpi_bus_update_power(acpi_handle handle, int *state_p)
|
||||||
|
{
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
static inline bool acpi_bus_power_manageable(acpi_handle handle)
|
||||||
|
{
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
static inline bool acpi_bus_can_wakeup(acpi_handle handle)
|
||||||
|
{
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
#endif /* !CONFIG_PM */
|
||||||
|
|
||||||
#ifdef CONFIG_ACPI_PROC_EVENT
|
#ifdef CONFIG_ACPI_PROC_EVENT
|
||||||
int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
|
int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
|
||||||
int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
|
int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
|
||||||
|
|
Loading…
Reference in New Issue