Commit 296699de authored by Rafael J. Wysocki's avatar Rafael J. Wysocki Committed by Linus Torvalds
Browse files

Introduce CONFIG_SUSPEND for suspend-to-Ram and standby 



Introduce CONFIG_SUSPEND representing the ability to enter system sleep
states, such as the ACPI S3 state, and allow the user to choose SUSPEND
and HIBERNATION independently of each other.

Make HOTPLUG_CPU be selected automatically if SUSPEND or HIBERNATION has
been chosen and the kernel is intended for SMP systems.

Also, introduce CONFIG_PM_SLEEP which is automatically selected if
CONFIG_SUSPEND or CONFIG_HIBERNATION is set and use it to select the
code needed for both suspend and hibernation.

The top-level power management headers and the ACPI code related to
suspend and hibernation are modified to use the new definitions (the
changes in drivers/acpi/sleep/main.c are, mostly, moving code to reduce
the number of ifdefs).

There are many other files in which CONFIG_PM can be replaced with
CONFIG_PM_SLEEP or even with CONFIG_SUSPEND, but they can be updated in
the future.

Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b0cb1a19

drivers/acpi/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -63,6 +63,14 @@ config ACPI_PROCFS 


	  Say N to delete /proc/acpi/ files that have moved to /sys/



config ACPI_PROCFS_SLEEP

	bool "/proc/acpi/sleep (deprecated)"

	depends on PM_SLEEP && ACPI_PROCFS

	default n

	---help---

	  Create /proc/acpi/sleep

	  Deprecated by /sys/power/state



config ACPI_AC

	tristate "AC Adapter"

	depends on X86

drivers/acpi/sleep/Makefile

+1 −1
Original line number Diff line number Diff line 
obj-y					:= poweroff.o wakeup.o

obj-y					+= main.o

obj-$(CONFIG_PM_SLEEP)			+= main.o

obj-$(CONFIG_X86)			+= proc.o



EXTRA_CFLAGS += $(ACPI_CFLAGS)

drivers/acpi/sleep/main.c

+50 −44
Original line number Diff line number Diff line
@@ -21,6 +21,9 @@ 


u8 sleep_states[ACPI_S_STATE_COUNT];



static u32 acpi_target_sleep_state = ACPI_STATE_S0;



#ifdef CONFIG_SUSPEND

static struct pm_ops acpi_pm_ops;



extern void do_suspend_lowlevel(void);
@@ -34,11 +37,6 @@ static u32 acpi_suspend_states[] = { 


static int init_8259A_after_S1;



extern int acpi_sleep_prepare(u32 acpi_state);

extern void acpi_power_off(void);



static u32 acpi_target_sleep_state = ACPI_STATE_S0;



/**

 *	acpi_pm_set_target - Set the target system sleep state to the state

 *		associated with given @pm_state, if supported.
@@ -163,21 +161,6 @@ static int acpi_pm_finish(suspend_state_t pm_state) 
	return 0;

}



int acpi_suspend(u32 acpi_state)

{

	suspend_state_t states[] = {

		[1] = PM_SUSPEND_STANDBY,

		[3] = PM_SUSPEND_MEM,

		[5] = PM_SUSPEND_MAX

	};



	if (acpi_state < 6 && states[acpi_state])

		return pm_suspend(states[acpi_state]);

	if (acpi_state == 4)

		return hibernate();

	return -EINVAL;

}



static int acpi_pm_state_valid(suspend_state_t pm_state)

{

	u32 acpi_state;
@@ -202,6 +185,27 @@ static struct pm_ops acpi_pm_ops = { 
	.finish = acpi_pm_finish,

};



/*

 * Toshiba fails to preserve interrupts over S1, reinitialization

 * of 8259 is needed after S1 resume.

 */

static int __init init_ints_after_s1(struct dmi_system_id *d)

{

	printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);

	init_8259A_after_S1 = 1;

	return 0;

}



static struct dmi_system_id __initdata acpisleep_dmi_table[] = {

	{

	 .callback = init_ints_after_s1,

	 .ident = "Toshiba Satellite 4030cdt",

	 .matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},

	 },

	{},

};

#endif /* CONFIG_SUSPEND */



#ifdef CONFIG_HIBERNATION

static int acpi_hibernation_prepare(void)

{
@@ -256,6 +260,21 @@ static struct hibernation_ops acpi_hibernation_ops = { 
};

#endif				/* CONFIG_HIBERNATION */



int acpi_suspend(u32 acpi_state)

{

	suspend_state_t states[] = {

		[1] = PM_SUSPEND_STANDBY,

		[3] = PM_SUSPEND_MEM,

		[5] = PM_SUSPEND_MAX

	};



	if (acpi_state < 6 && states[acpi_state])

		return pm_suspend(states[acpi_state]);

	if (acpi_state == 4)

		return hibernate();

	return -EINVAL;

}



/**

 *	acpi_pm_device_sleep_state - return preferred power state of ACPI device

 *		in the system sleep state given by %acpi_target_sleep_state
@@ -331,39 +350,22 @@ int acpi_pm_device_sleep_state(struct device *dev, int wake, int *d_min_p) 
	return d_max;

}



/*

 * Toshiba fails to preserve interrupts over S1, reinitialization

 * of 8259 is needed after S1 resume.

 */

static int __init init_ints_after_s1(struct dmi_system_id *d)

{

	printk(KERN_WARNING "%s with broken S1 detected.\n", d->ident);

	init_8259A_after_S1 = 1;

	return 0;

}



static struct dmi_system_id __initdata acpisleep_dmi_table[] = {

	{

	 .callback = init_ints_after_s1,

	 .ident = "Toshiba Satellite 4030cdt",

	 .matches = {DMI_MATCH(DMI_PRODUCT_NAME, "S4030CDT/4.3"),},

	 },

	{},

};



int __init acpi_sleep_init(void)

{

	acpi_status status;

	u8 type_a, type_b;

#ifdef CONFIG_SUSPEND

	int i = 0;



	dmi_check_system(acpisleep_dmi_table);

#endif



	if (acpi_disabled)

		return 0;



#ifdef CONFIG_SUSPEND

	printk(KERN_INFO PREFIX "(supports");

	for (i = 0; i < ACPI_S_STATE_COUNT; i++) {

		acpi_status status;

		u8 type_a, type_b;

	for (i = ACPI_STATE_S0; i < ACPI_STATE_S4; i++) {

		status = acpi_get_sleep_type_data(i, &type_a, &type_b);

		if (ACPI_SUCCESS(status)) {

			sleep_states[i] = 1;
@@ -373,10 +375,14 @@ int __init acpi_sleep_init(void) 
	printk(")\n");



	pm_set_ops(&acpi_pm_ops);

#endif



#ifdef CONFIG_HIBERNATION

	if (sleep_states[ACPI_STATE_S4])

	status = acpi_get_sleep_type_data(ACPI_STATE_S4, &type_a, &type_b);

	if (ACPI_SUCCESS(status)) {

		hibernation_set_ops(&acpi_hibernation_ops);

		sleep_states[ACPI_STATE_S4] = 1;

	}

#else

	sleep_states[ACPI_STATE_S4] = 0;

#endif

drivers/acpi/sleep/proc.c

+5 −5
Original line number Diff line number Diff line
@@ -23,7 +23,7 @@ 
 */



ACPI_MODULE_NAME("sleep")

#ifdef	CONFIG_ACPI_PROCFS

#ifdef	CONFIG_ACPI_PROCFS_SLEEP

static int acpi_system_sleep_seq_show(struct seq_file *seq, void *offset)

{

	int i;
@@ -76,7 +76,7 @@ acpi_system_write_sleep(struct file *file, 
      Done:

	return error ? error : count;

}

#endif				/* CONFIG_ACPI_PROCFS */

#endif				/* CONFIG_ACPI_PROCFS_SLEEP */



#if defined(CONFIG_RTC_DRV_CMOS) || defined(CONFIG_RTC_DRV_CMOS_MODULE)

/* use /sys/class/rtc/rtcX/wakealarm instead; it's not ACPI-specific */
@@ -471,7 +471,7 @@ static const struct file_operations acpi_system_wakeup_device_fops = { 
	.release = single_release,

};



#ifdef	CONFIG_ACPI_PROCFS

#ifdef	CONFIG_ACPI_PROCFS_SLEEP

static const struct file_operations acpi_system_sleep_fops = {

	.open = acpi_system_sleep_open_fs,

	.read = seq_read,
@@ -479,7 +479,7 @@ static const struct file_operations acpi_system_sleep_fops = { 
	.llseek = seq_lseek,

	.release = single_release,

};

#endif				/* CONFIG_ACPI_PROCFS */

#endif				/* CONFIG_ACPI_PROCFS_SLEEP */



#ifdef	HAVE_ACPI_LEGACY_ALARM

static const struct file_operations acpi_system_alarm_fops = {
@@ -506,7 +506,7 @@ static int __init acpi_sleep_proc_init(void) 
	if (acpi_disabled)

		return 0;



#ifdef	CONFIG_ACPI_PROCFS

#ifdef	CONFIG_ACPI_PROCFS_SLEEP

	/* 'sleep' [R/W] */

	entry =

	    create_proc_entry("sleep", S_IFREG | S_IRUGO | S_IWUSR,

drivers/acpi/sleep/sleep.h

+2 −0
Original line number Diff line number Diff line
@@ -6,3 +6,5 @@ extern void acpi_enable_wakeup_device_prep(u8 sleep_state); 
extern void acpi_enable_wakeup_device(u8 sleep_state);

extern void acpi_disable_wakeup_device(u8 sleep_state);

extern void acpi_gpe_sleep_prepare(u32 sleep_state);



extern int acpi_sleep_prepare(u32 acpi_state);

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