Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-apm

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-apm:
  [APM] SH: Convert to use shared APM emulation.
  [APM] MIPS: Convert to use shared APM emulation.
  [APM] ARM: Convert to use shared APM emulation.
  [APM] Add shared version of APM emulation

19 files changed, 80 insertions, 1370 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 6783c2e5512..1523046e092 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -9,6 +9,7 @@ config ARM
 	bool
 	default y
 	select RTC_LIB
+	select SYS_SUPPORTS_APM_EMULATION
 	help
 	  The ARM series is a line of low-power-consumption RISC chip designs
 	  licensed by ARM Ltd and targeted at embedded applications and
@@ -17,6 +18,9 @@ config ARM
 	  Europe.  There is an ARM Linux project with a web page at
 	  <http://www.arm.linux.org.uk/>.
 
+config SYS_SUPPORTS_APM_EMULATION
+	bool
+
 config GENERIC_TIME
 	bool
 	default n
@@ -856,31 +860,6 @@ menu "Power management options"
 
 source "kernel/power/Kconfig"
 
-config APM
-	tristate "Advanced Power Management Emulation"
-	---help---
-	  APM is a BIOS specification for saving power using several different
-	  techniques. This is mostly useful for battery powered laptops with
-	  APM compliant BIOSes. If you say Y here, the system time will be
-	  reset after a RESUME operation, the /proc/apm device will provide
-	  battery status information, and user-space programs will receive
-	  notification of APM "events" (e.g. battery status change).
-
-	  In order to use APM, you will need supporting software. For location
-	  and more information, read <file:Documentation/pm.txt> and the
-	  Battery Powered Linux mini-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
-
-	  This driver does not spin down disk drives (see the hdparm(8)
-	  manpage ("man 8 hdparm") for that), and it doesn't turn off
-	  VESA-compliant "green" monitors.
-
-	  Generally, if you don't have a battery in your machine, there isn't
-	  much point in using this driver and you should say N. If you get
-	  random kernel OOPSes or reboots that don't seem to be related to
-	  anything, try disabling/enabling this option (or disabling/enabling
-	  APM in your BIOS).
-
 endmenu
 
 source "net/Kconfig"
diff --git a/arch/arm/common/sharpsl_pm.c b/arch/arm/common/sharpsl_pm.c
index b3599743093..a3b450f8ef1 100644
--- a/arch/arm/common/sharpsl_pm.c
+++ b/arch/arm/common/sharpsl_pm.c
@@ -27,7 +27,7 @@
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
 #include <asm/irq.h>
-#include <asm/apm.h>
+#include <asm/apm-emulation.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/sharpsl.h>
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index ab06a86e85d..1b935fb94b8 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -10,7 +10,6 @@ obj-y		:= compat.o entry-armv.o entry-common.o irq.o \
 		   process.o ptrace.o semaphore.o setup.o signal.o sys_arm.o \
 		   time.o traps.o
 
-obj-$(CONFIG_APM)		+= apm.o
 obj-$(CONFIG_ISA_DMA_API)	+= dma.o
 obj-$(CONFIG_ARCH_ACORN)	+= ecard.o 
 obj-$(CONFIG_FIQ)		+= fiq.o
diff --git a/arch/arm/mach-pxa/corgi_pm.c b/arch/arm/mach-pxa/corgi_pm.c
index 4c3de4008a4..165017de8d0 100644
--- a/arch/arm/mach-pxa/corgi_pm.c
+++ b/arch/arm/mach-pxa/corgi_pm.c
@@ -16,7 +16,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
-#include <asm/apm.h>
+#include <asm/apm-emulation.h>
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
diff --git a/arch/arm/mach-pxa/sharpsl_pm.c b/arch/arm/mach-pxa/sharpsl_pm.c
index db6e8f56a75..b1d8cfca245 100644
--- a/arch/arm/mach-pxa/sharpsl_pm.c
+++ b/arch/arm/mach-pxa/sharpsl_pm.c
@@ -23,7 +23,7 @@
 
 #include <asm/hardware.h>
 #include <asm/mach-types.h>
-#include <asm/apm.h>
+#include <asm/apm-emulation.h>
 #include <asm/arch/pm.h>
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/sharpsl.h>
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c
index 40be833079c..b97d543d936 100644
--- a/arch/arm/mach-pxa/spitz_pm.c
+++ b/arch/arm/mach-pxa/spitz_pm.c
@@ -16,7 +16,7 @@
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/platform_device.h>
-#include <asm/apm.h>
+#include <asm/apm-emulation.h>
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 #include <asm/hardware.h>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 44a0224c32d..9d839a9c4b1 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -934,6 +934,9 @@ config CPU_LITTLE_ENDIAN
 
 endchoice
 
+config SYS_SUPPORTS_APM_EMULATION
+	bool
+
 config SYS_SUPPORTS_BIG_ENDIAN
 	bool
 
@@ -1001,6 +1004,7 @@ config SOC_AU1X00
 	bool
 	select SYS_HAS_CPU_MIPS32_R1
 	select SYS_SUPPORTS_32BIT_KERNEL
+	select SYS_SUPPORTS_APM_EMULATION
 
 config PNX8550
 	bool
@@ -2071,35 +2075,11 @@ config BINFMT_ELF32
 	bool
 	default y if MIPS32_O32 || MIPS32_N32
 
-config PM
-	bool "Power Management support (EXPERIMENTAL)"
-	depends on EXPERIMENTAL && SOC_AU1X00
-
-config APM
-        tristate "Advanced Power Management Emulation"
-	depends on PM
-        ---help---
-	  APM is a BIOS specification for saving power using several different
-	  techniques. This is mostly useful for battery powered systems with
-	  APM compliant BIOSes. If you say Y here, the system time will be
-	  reset after a RESUME operation, the /proc/apm device will provide
-	  battery status information, and user-space programs will receive
-	  notification of APM "events" (e.g. battery status change).
-
-	  In order to use APM, you will need supporting software. For location
-	  and more information, read <file:Documentation/pm.txt> and the
-	  Battery Powered Linux mini-HOWTO, available from
-	  <http://www.tldp.org/docs.html#howto>.
-
-	  This driver does not spin down disk drives (see the hdparm(8)
-	  manpage ("man 8 hdparm") for that), and it doesn't turn off
-	  VESA-compliant "green" monitors.
-
-	  Generally, if you don't have a battery in your machine, there isn't
-	  much point in using this driver and you should say N. If you get
-	  random kernel OOPSes or reboots that don't seem to be related to
-	  anything, try disabling/enabling this option (or disabling/enabling
-	  APM in your BIOS).
+endmenu
+
+menu "Power management options"
+
+source "kernel/power/Kconfig"
 
 endmenu
 
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index bbbb8d7cb89..1bf2c844891 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -14,8 +14,6 @@ binfmt_irix-objs	:= irixelf.o irixinv.o irixioctl.o irixsig.o	\
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
 obj-$(CONFIG_MODULES)		+= mips_ksyms.o module.o
 
-obj-$(CONFIG_APM)		+= apm.o
-
 obj-$(CONFIG_CPU_R3000)		+= r2300_fpu.o r2300_switch.o
 obj-$(CONFIG_CPU_TX39XX)	+= r2300_fpu.o r2300_switch.o
 obj-$(CONFIG_CPU_TX49XX)	+= r4k_fpu.o r4k_switch.o
diff --git a/arch/mips/kernel/apm.c b/arch/mips/kernel/apm.c
deleted file mode 100644
index ba16d07588c..00000000000
--- a/arch/mips/kernel/apm.c
+++ /dev/null
@@ -1,604 +0,0 @@
-/*
- * bios-less APM driver for MIPS Linux
- *  Jamey Hicks <jamey@crl.dec.com>
- *  adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com)
- *
- * APM 1.2 Reference:
- *   Intel Corporation, Microsoft Corporation. Advanced Power Management
- *   (APM) BIOS Interface Specification, Revision 1.2, February 1996.
- *
- * [This document is available from Microsoft at:
- *    http://www.microsoft.com/hwdev/busbios/amp_12.htm]
- */
-#include <linux/module.h>
-#include <linux/poll.h>
-#include <linux/timer.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/miscdevice.h>
-#include <linux/apm_bios.h>
-#include <linux/capability.h>
-#include <linux/sched.h>
-#include <linux/pm.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/list.h>
-#include <linux/init.h>
-#include <linux/completion.h>
-
-#include <asm/apm.h> /* apm_power_info */
-#include <asm/system.h>
-
-/*
- * The apm_bios device is one of the misc char devices.
- * This is its minor number.
- */
-#define APM_MINOR_DEV	134
-
-/*
- * See Documentation/Config.help for the configuration options.
- *
- * Various options can be changed at boot time as follows:
- * (We allow underscores for compatibility with the modules code)
- *	apm=on/off			enable/disable APM
- */
-
-/*
- * Maximum number of events stored
- */
-#define APM_MAX_EVENTS		16
-
-struct apm_queue {
-	unsigned int		event_head;
-	unsigned int		event_tail;
-	apm_event_t		events[APM_MAX_EVENTS];
-};
-
-/*
- * The per-file APM data
- */
-struct apm_user {
-	struct list_head	list;
-
-	unsigned int		suser: 1;
-	unsigned int		writer: 1;
-	unsigned int		reader: 1;
-
-	int			suspend_result;
-	unsigned int		suspend_state;
-#define SUSPEND_NONE	0		/* no suspend pending */
-#define SUSPEND_PENDING	1		/* suspend pending read */
-#define SUSPEND_READ	2		/* suspend read, pending ack */
-#define SUSPEND_ACKED	3		/* suspend acked */
-#define SUSPEND_DONE	4		/* suspend completed */
-
-	struct apm_queue	queue;
-};
-
-/*
- * Local variables
- */
-static int suspends_pending;
-static int apm_disabled;
-static int mips_apm_active;
-
-static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
-static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
-
-/*
- * This is a list of everyone who has opened /dev/apm_bios
- */
-static DECLARE_RWSEM(user_list_lock);
-static LIST_HEAD(apm_user_list);
-
-/*
- * kapmd info.  kapmd provides us a process context to handle
- * "APM" events within - specifically necessary if we're going
- * to be suspending the system.
- */
-static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait);
-static DECLARE_COMPLETION(kapmd_exit);
-static DEFINE_SPINLOCK(kapmd_queue_lock);
-static struct apm_queue kapmd_queue;
-
-
-static const char driver_version[] = "1.13";	/* no spaces */
-
-
-
-/*
- * Compatibility cruft until the IPAQ people move over to the new
- * interface.
- */
-static void __apm_get_power_status(struct apm_power_info *info)
-{
-}
-
-/*
- * This allows machines to provide their own "apm get power status" function.
- */
-void (*apm_get_power_status)(struct apm_power_info *) = __apm_get_power_status;
-EXPORT_SYMBOL(apm_get_power_status);
-
-
-/*
- * APM event queue management.
- */
-static inline int queue_empty(struct apm_queue *q)
-{
-	return q->event_head == q->event_tail;
-}
-
-static inline apm_event_t queue_get_event(struct apm_queue *q)
-{
-	q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
-	return q->events[q->event_tail];
-}
-
-static void queue_add_event(struct apm_queue *q, apm_event_t event)
-{
-	q->event_head = (q->event_head + 1) % APM_MAX_EVENTS;
-	if (q->event_head == q->event_tail) {
-		static int notified;
-
-		if (notified++ == 0)
-		    printk(KERN_ERR "apm: an event queue overflowed\n");
-		q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
-	}
-	q->events[q->event_head] = event;
-}
-
-static void queue_event_one_user(struct apm_user *as, apm_event_t event)
-{
-	if (as->suser && as->writer) {
-		switch (event) {
-		case APM_SYS_SUSPEND:
-		case APM_USER_SUSPEND:
-			/*
-			 * If this user already has a suspend pending,
-			 * don't queue another one.
-			 */
-			if (as->suspend_state != SUSPEND_NONE)
-				return;
-
-			as->suspend_state = SUSPEND_PENDING;
-			suspends_pending++;
-			break;
-		}
-	}
-	queue_add_event(&as->queue, event);
-}
-
-static void queue_event(apm_event_t event, struct apm_user *sender)
-{
-	struct apm_user *as;
-
-	down_read(&user_list_lock);
-	list_for_each_entry(as, &apm_user_list, list) {
-		if (as != sender && as->reader)
-			queue_event_one_user(as, event);
-	}
-	up_read(&user_list_lock);
-	wake_up_interruptible(&apm_waitqueue);
-}
-
-static void apm_suspend(void)
-{
-	struct apm_user *as;
-	int err = pm_suspend(PM_SUSPEND_MEM);
-
-	/*
-	 * Anyone on the APM queues will think we're still suspended.
-	 * Send a message so everyone knows we're now awake again.
-	 */
-	queue_event(APM_NORMAL_RESUME, NULL);
-
-	/*
-	 * Finally, wake up anyone who is sleeping on the suspend.
-	 */
-	down_read(&user_list_lock);
-	list_for_each_entry(as, &apm_user_list, list) {
-		as->suspend_result = err;
-		as->suspend_state = SUSPEND_DONE;
-	}
-	up_read(&user_list_lock);
-
-	wake_up(&apm_suspend_waitqueue);
-}
-
-static ssize_t apm_read(struct file *fp, char __user *buf, size_t count, loff_t *ppos)
-{
-	struct apm_user *as = fp->private_data;
-	apm_event_t event;
-	int i = count, ret = 0;
-
-	if (count < sizeof(apm_event_t))
-		return -EINVAL;
-
-	if (queue_empty(&as->queue) && fp->f_flags & O_NONBLOCK)
-		return -EAGAIN;
-
-	wait_event_interruptible(apm_waitqueue, !queue_empty(&as->queue));
-
-	while ((i >= sizeof(event)) && !queue_empty(&as->queue)) {
-		event = queue_get_event(&as->queue);
-
-		ret = -EFAULT;
-		if (copy_to_user(buf, &event, sizeof(event)))
-			break;
-
-		if (event == APM_SYS_SUSPEND || event == APM_USER_SUSPEND)
-			as->suspend_state = SUSPEND_READ;
-
-		buf += sizeof(event);
-		i -= sizeof(event);
-	}
-
-	if (i < count)
-		ret = count - i;
-
-	return ret;
-}
-
-static unsigned int apm_poll(struct file *fp, poll_table * wait)
-{
-	struct apm_user *as = fp->private_data;
-
-	poll_wait(fp, &apm_waitqueue, wait);
-	return queue_empty(&as->queue) ? 0 : POLLIN | POLLRDNORM;
-}
-
-/*
- * apm_ioctl - handle APM ioctl
- *
- * APM_IOC_SUSPEND
- *   This IOCTL is overloaded, and performs two functions.  It is used to:
- *     - initiate a suspend
- *     - acknowledge a suspend read from /dev/apm_bios.
- *   Only when everyone who has opened /dev/apm_bios with write permission
- *   has acknowledge does the actual suspend happen.
- */
-static int
-apm_ioctl(struct inode * inode, struct file *filp, unsigned int cmd, unsigned long arg)
-{
-	struct apm_user *as = filp->private_data;
-	unsigned long flags;
-	int err = -EINVAL;
-
-	if (!as->suser || !as->writer)
-		return -EPERM;
-
-	switch (cmd) {
-	case APM_IOC_SUSPEND:
-		as->suspend_result = -EINTR;
-
-		if (as->suspend_state == SUSPEND_READ) {
-			/*
-			 * If we read a suspend command from /dev/apm_bios,
-			 * then the corresponding APM_IOC_SUSPEND ioctl is
-			 * interpreted as an acknowledge.
-			 */
-			as->suspend_state = SUSPEND_ACKED;
-			suspends_pending--;
-		} else {
-			/*
-			 * Otherwise it is a request to suspend the system.
-			 * Queue an event for all readers, and expect an
-			 * acknowledge from all writers who haven't already
-			 * acknowledged.
-			 */
-			queue_event(APM_USER_SUSPEND, as);
-		}
-
-		/*
-		 * If there are no further acknowledges required, suspend
-		 * the system.
-		 */
-		if (suspends_pending == 0)
-			apm_suspend();
-
-		/*
-		 * Wait for the suspend/resume to complete.  If there are
-		 * pending acknowledges, we wait here for them.
-		 *
-		 * Note that we need to ensure that the PM subsystem does
-		 * not kick us out of the wait when it suspends the threads.
-		 */
-		flags = current->flags;
-		current->flags |= PF_NOFREEZE;
-
-		/*
-		 * Note: do not allow a thread which is acking the suspend
-		 * to escape until the resume is complete.
-		 */
-		if (as->suspend_state == SUSPEND_ACKED)
-			wait_event(apm_suspend_waitqueue,
-					 as->suspend_state == SUSPEND_DONE);
-		else
-			wait_event_interruptible(apm_suspend_waitqueue,
-					 as->suspend_state == SUSPEND_DONE);
-
-		current->flags = flags;
-		err = as->suspend_result;
-		as->suspend_state = SUSPEND_NONE;
-		break;
-	}
-
-	return err;
-}
-
-static int apm_release(struct inode * inode, struct file * filp)
-{
-	struct apm_user *as = filp->private_data;
-	filp->private_data = NULL;
-
-	down_write(&user_list_lock);
-	list_del(&as->list);
-	up_write(&user_list_lock);
-
-	/*
-	 * We are now unhooked from the chain.  As far as new
-	 * events are concerned, we no longer exist.  However, we
-	 * need to balance suspends_pending, which means the
-	 * possibility of sleeping.
-	 */
-	if (as->suspend_state != SUSPEND_NONE) {
-		suspends_pending -= 1;
-		if (suspends_pending == 0)
-			apm_suspend();
-	}
-
-	kfree(as);
-	return 0;
-}
-
-static int apm_open(struct inode * inode, struct file * filp)
-{
-	struct apm_user *as;
-
-	as = kzalloc(sizeof(*as), GFP_KERNEL);
-	if (as) {
-		/*
-		 * XXX - this is a tiny bit broken, when we consider BSD
-		 * process accounting. If the device is opened by root, we
-		 * instantly flag that we used superuser privs. Who knows,
-		 * we might close the device immediately without doing a
-		 * privileged operation -- cevans
-		 */
-		as->suser = capable(CAP_SYS_ADMIN);
-		as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
-		as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
-
-		down_write(&user_list_lock);
-		list_add(&as->list, &apm_user_list);
-		up_write(&user_list_lock);
-
-		filp->private_data = as;
-	}
-
-	return as ? 0 : -ENOMEM;
-}
-
-static struct file_operations apm_bios_fops = {
-	.owner		= THIS_MODULE,
-	.read		= apm_read,
-	.poll		= apm_poll,
-	.ioctl		= apm_ioctl,
-	.open		= apm_open,
-	.release	= apm_release,
-};
-
-static struct miscdevice apm_device = {
-	.minor		= APM_MINOR_DEV,
-	.name		= "apm_bios",
-	.fops		= &apm_bios_fops
-};
-
-
-#ifdef CONFIG_PROC_FS
-/*
- * Arguments, with symbols from linux/apm_bios.h.
- *
- *   0) Linux driver version (this will change if format changes)
- *   1) APM BIOS Version.  Usually 1.0, 1.1 or 1.2.
- *   2) APM flags from APM Installation Check (0x00):
- *	bit 0: APM_16_BIT_SUPPORT
- *	bit 1: APM_32_BIT_SUPPORT
- *	bit 2: APM_IDLE_SLOWS_CLOCK
- *	bit 3: APM_BIOS_DISABLED
- *	bit 4: APM_BIOS_DISENGAGED
- *   3) AC line status
- *	0x00: Off-line
- *	0x01: On-line
- *	0x02: On backup power (BIOS >= 1.1 only)
- *	0xff: Unknown
- *   4) Battery status
- *	0x00: High
- *	0x01: Low
- *	0x02: Critical
- *	0x03: Charging
- *	0x04: Selected battery not present (BIOS >= 1.2 only)
- *	0xff: Unknown
- *   5) Battery flag
- *	bit 0: High
- *	bit 1: Low
- *	bit 2: Critical
- *	bit 3: Charging
- *	bit 7: No system battery
- *	0xff: Unknown
- *   6) Remaining battery life (percentage of charge):
- *	0-100: valid
- *	-1: Unknown
- *   7) Remaining battery life (time units):
- *	Number of remaining minutes or seconds
- *	-1: Unknown
- *   8) min = minutes; sec = seconds
- */
-static int apm_get_info(char *buf, char **start, off_t fpos, int length)
-{
-	struct apm_power_info info;
-	char *units;
-	int ret;
-
-	info.ac_line_status = 0xff;
-	info.battery_status = 0xff;
-	info.battery_flag   = 0xff;
-	info.battery_life   = -1;
-	info.time	    = -1;
-	info.units	    = -1;
-
-	if (apm_get_power_status)
-		apm_get_power_status(&info);
-
-	switch (info.units) {
-	default:	units = "?";	break;
-	case 0: 	units = "min";	break;
-	case 1: 	units = "sec";	break;
-	}
-
-	ret = sprintf(buf, "%s 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
-		     driver_version, APM_32_BIT_SUPPORT,
-		     info.ac_line_status, info.battery_status,
-		     info.battery_flag, info.battery_life,
-		     info.time, units);
-
- 	return ret;
-}
-#endif
-
-static int kapmd(void *arg)
-{
-	daemonize("kapmd");
-	current->flags |= PF_NOFREEZE;
-
-	do {
-		apm_event_t event;
-
-		wait_event_interruptible(kapmd_wait,
-				!queue_empty(&kapmd_queue) || !mips_apm_active);
-
-		if (!mips_apm_active)
-			break;
-
-		spin_lock_irq(&kapmd_queue_lock);
-		event = 0;
-		if (!queue_empty(&kapmd_queue))
-			event = queue_get_event(&kapmd_queue);
-		spin_unlock_irq(&kapmd_queue_lock);
-
-		switch (event) {
-		case 0:
-			break;
-
-		case APM_LOW_BATTERY:
-		case APM_POWER_STATUS_CHANGE:
-			queue_event(event, NULL);
-			break;
-
-		case APM_USER_SUSPEND:
-		case APM_SYS_SUSPEND:
-			queue_event(event, NULL);
-			if (suspends_pending == 0)
-				apm_suspend();
-			break;
-
-		case APM_CRITICAL_SUSPEND:
-			apm_suspend();
-			break;
-		}
-	} while (1);
-
-	complete_and_exit(&kapmd_exit, 0);
-}
-
-static int __init apm_init(void)
-{
-	int ret;
-
-	if (apm_disabled) {
-		printk(KERN_NOTICE "apm: disabled on user request.\n");
-		return -ENODEV;
-	}
-
-	mips_apm_active = 1;
-
-	ret = kernel_thread(kapmd, NULL, CLONE_KERNEL);
-	if (ret < 0) {
-		mips_apm_active = 0;
-		return ret;
-	}
-
-#ifdef CONFIG_PROC_FS
-	create_proc_info_entry("apm", 0, NULL, apm_get_info);
-#endif
-
-	ret = misc_register(&apm_device);
-	if (ret != 0) {
-		remove_proc_entry("apm", NULL);
-
-		mips_apm_active = 0;
-		wake_up(&kapmd_wait);
-		wait_for_completion(&kapmd_exit);
-	}
-
-	return ret;
-}
-
-static void __exit apm_exit(void)
-{
-	misc_deregister(&apm_device);
-	remove_proc_entry("apm", NULL);
-
-	mips_apm_active = 0;
-	wake_up(&kapmd_wait);
-	wait_for_completion(&kapmd_exit);
-}
-
-module_init(apm_init);
-module_exit(apm_exit);
-
-MODULE_AUTHOR("Stephen Rothwell");
-MODULE_DESCRIPTION("Advanced Power Management");
-MODULE_LICENSE("GPL");
-
-#ifndef MODULE
-static int __init apm_setup(char *str)
-{
-	while ((str != NULL) && (*str != '\0')) {
-		if (strncmp(str, "off", 3) == 0)
-			apm_disabled = 1;
-		if (strncmp(str, "on", 2) == 0)
-			apm_disabled = 0;
-		str = strchr(str, ',');
-		if (str != NULL)
-			str += strspn(str, ", \t");
-	}
-	return 1;
-}
-
-__setup("apm=", apm_setup);
-#endif
-
-/**
- * apm_queue_event - queue an APM event for kapmd
- * @event: APM event
- *
- * Queue an APM event for kapmd to process and ultimately take the
- * appropriate action.  Only a subset of events are handled:
- *   %APM_LOW_BATTERY
- *   %APM_POWER_STATUS_CHANGE
- *   %APM_USER_SUSPEND
- *   %APM_SYS_SUSPEND
- *   %APM_CRITICAL_SUSPEND
- */
-void apm_queue_event(apm_event_t event)
-{
-	unsigned long flags;
-
-	spin_lock_irqsave(&kapmd_queue_lock, flags);
-	queue_add_event(&kapmd_queue, event);
-	spin_unlock_irqrestore(&kapmd_queue_lock, flags);
-
-	wake_up_interruptible(&kapmd_wait);
-}
-EXPORT_SYMBOL(apm_queue_event);
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 3aa3b885ab3..4f3891215b8 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -48,6 +48,9 @@ config GENERIC_IOMAP
 config GENERIC_TIME
 	def_bool n
 
+config SYS_SUPPORTS_APM_EMULATION
+	bool
+
 config ARCH_MAY_HAVE_PC_FDC
 	bool
 
@@ -126,6 +129,7 @@ config SH_7751_SYSTEMH
 
 config SH_HP6XX
 	bool "HP6XX"
+	select SYS_SUPPORTS_APM_EMULATION
 	help
 	  Select HP6XX if configuring for a HP jornada HP6xx.
 	  More information (hardware only) at
@@ -694,9 +698,6 @@ depends on EXPERIMENTAL
 
 source kernel/power/Kconfig
 
-config APM
-	bool "Advanced Power Management Emulation"
-	depends on PM
 endmenu
 
 source "net/Kconfig"
diff --git a/arch/sh/boards/hp6xx/hp6xx_apm.c b/arch/sh/boards/hp6xx/hp6xx_apm.c
index d146cdaa0b8..d1c1460c8a0 100644
--- a/arch/sh/boards/hp6xx/hp6xx_apm.c
+++ b/arch/sh/boards/hp6xx/hp6xx_apm.c
@@ -7,12 +7,11 @@
  * modify it under the terms of the GNU General Public License.
  */
 #include <linux/module.h>
-#include <linux/apm_bios.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
-#include <asm/io.h>
-#include <asm/apm.h>
+#include <linux/apm-emulation.h>
+#include <linux/io.h>
 #include <asm/adc.h>
 #include <asm/hp6xx.h>
 
@@ -27,60 +26,41 @@
 
 #define MODNAME "hp6x0_apm"
 
-static int hp6x0_apm_get_info(char *buf, char **start, off_t fpos, int length)
+static void hp6x0_apm_get_power_status(struct apm_power_info *info)
 {
+	int battery, backup, charging, percentage;
 	u8 pgdr;
-	char *p;
-	int battery_status;
-	int battery_flag;
-	int ac_line_status;
-	int time_units = APM_BATTERY_LIFE_UNKNOWN;
 
-	int battery = adc_single(ADC_CHANNEL_BATTERY);
-	int backup = adc_single(ADC_CHANNEL_BACKUP);
-	int charging = adc_single(ADC_CHANNEL_CHARGE);
-	int percentage;
+	battery		= adc_single(ADC_CHANNEL_BATTERY);
+	backup		= adc_single(ADC_CHANNEL_BACKUP);
+	charging	= adc_single(ADC_CHANNEL_CHARGE);
 
 	percentage = 100 * (battery - HP680_BATTERY_MIN) /
 			   (HP680_BATTERY_MAX - HP680_BATTERY_MIN);
 
-	ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
+	info->ac_line_status = (battery > HP680_BATTERY_AC_ON) ?
 			 APM_AC_ONLINE : APM_AC_OFFLINE;
 
-	p = buf;
-
 	pgdr = ctrl_inb(SH7709_PGDR);
 	if (pgdr & PGDR_MAIN_BATTERY_OUT) {
-		battery_status = APM_BATTERY_STATUS_NOT_PRESENT;
-		battery_flag = 0x80;
-		percentage = -1;
-	} else if (charging < 8 ) {
-		battery_status = APM_BATTERY_STATUS_CHARGING;
-		battery_flag = 0x08;
-		ac_line_status = 0xff;
+		info->battery_status	= APM_BATTERY_STATUS_NOT_PRESENT;
+		info->battery_flag	= 0x80;
+	} else if (charging < 8) {
+		info->battery_status	= APM_BATTERY_STATUS_CHARGING;
+		info->battery_flag	= 0x08;
+		info->ac_line_status = 0xff;
 	} else if (percentage <= APM_CRITICAL) {
-		battery_status = APM_BATTERY_STATUS_CRITICAL;
-		battery_flag = 0x04;
+		info->battery_status	= APM_BATTERY_STATUS_CRITICAL;
+		info->battery_flag	= 0x04;
 	} else if (percentage <= APM_LOW) {
-		battery_status = APM_BATTERY_STATUS_LOW;
-		battery_flag = 0x02;
+		info->battery_status	= APM_BATTERY_STATUS_LOW;
+		info->battery_flag	= 0x02;
 	} else {
-		battery_status = APM_BATTERY_STATUS_HIGH;
-		battery_flag = 0x01;
+		info->battery_status	= APM_BATTERY_STATUS_HIGH;
+		info->battery_flag	= 0x01;
 	}
 
-	p += sprintf(p, "1.0 1.2 0x%02x 0x%02x 0x%02x 0x%02x %d%% %d %s\n",
-		     APM_32_BIT_SUPPORT,
-		     ac_line_status,
-		     battery_status,
-		     battery_flag,
-		     percentage,
-		     time_units,
-		     "min");
-	p += sprintf(p, "bat=%d backup=%d charge=%d\n",
-		     battery, backup, charging);
-
-	return p - buf;
+	info->units = 0;
 }
 
 static irqreturn_t hp6x0_apm_interrupt(int irq, void *dev)
@@ -96,14 +76,14 @@ static int __init hp6x0_apm_init(void)
 	int ret;
 
 	ret = request_irq(HP680_BTN_IRQ, hp6x0_apm_interrupt,
-			  IRQF_DISABLED, MODNAME, 0);
+			  IRQF_DISABLED, MODNAME, NULL);
 	if (unlikely(ret < 0)) {
 		printk(KERN_ERR MODNAME ": IRQ %d request failed\n",
 		       HP680_BTN_IRQ);
 		return ret;
 	}
 
-	apm_get_info = hp6x0_apm_get_info;
+	apm_get_power_status = hp6x0_apm_get_power_status;
 
 	return ret;
 }
@@ -111,7 +91,7 @@ static int __init hp6x0_apm_init(void)
 static void __exit hp6x0_apm_exit(void)
 {
 	free_irq(HP680_BTN_IRQ, 0);
-	apm_get_info = 0;
+	apm_get_info = NULL;
 }
 
 module_init(hp6x0_apm_init);
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 99c7e5249f7..2f6d2bcb1c9 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -19,6 +19,5 @@ obj-$(CONFIG_SH_CPU_FREQ)	+= cpufreq.o
 obj-$(CONFIG_MODULES)		+= module.o
 obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 obj-$(CONFIG_KEXEC)		+= machine_kexec.o relocate_kernel.o
-obj-$(CONFIG_APM)		+= apm.o
 obj-$(CONFIG_PM)		+= pm.o
 obj-$(CONFIG_STACKTRACE)	+= stacktrace.o
diff --git a/arch/sh/kernel/apm.c b/arch/sh/kernel/apm.c
deleted file mode 100644
index 4f66f91b100..00000000000
--- a/arch/sh/kernel/apm.c
+++ /dev/null
@@ -1,538 +0,0 @@
-/*
- * bios-less APM driver for hp680
- *
- * Copyright 2005 (c) Andriy Skulysh <askulysh@gmail.com>
- *
- * based on ARM APM driver by
- *  Jamey Hicks <jamey@crl.dec.com>
- *
- * adapted from the APM BIOS driver for Linux by
- *  Stephen Rothwell (sfr@linuxcare.com)
- *
- * APM 1.2 Reference:
- *   Intel Corporation, Microsoft Corporation. Advanced Power Management
- *   (APM) BIOS Interface Specification, Revision 1.2, February 1996.
- *
- * [This document is available from Microsoft at:
- *    http://www.microsoft.com/hwdev/busbios/amp_12.htm]
- */
-#include <linux/module.h>
-#include <linux/poll.h>
-#include <linux/timer.h>
-#include <linux/slab.h>
-#include <linux/proc_fs.h>
-#include <linux/miscdevice.h>
-#include <linux/apm_bios.h>
-#include <linux/pm.h>
-#include <linux/pm_legacy.h>
-#include <asm/apm.h>
-
-#define MODNAME "apm"
-
-/*
- * The apm_bios device is one of the misc char devices.
- * This is its minor number.
- */
-#define APM_MINOR_DEV			134
-
-/*
- * Maximum number of events stored
- */
-#define APM_MAX_EVENTS			16
-
-struct apm_queue {
-	unsigned int		event_head;
-	unsigned int		event_tail;
-	apm_event_t		events[APM_MAX_EVENTS];
-};
-
-/*
- * The per-file APM data
- */
-struct apm_user {
-	struct list_head	list;
-
-	unsigned int		suser: 1;
-	unsigned int		writer: 1;
-	unsigned int		reader: 1;
-
-	int			suspend_result;
-	unsigned int		suspend_state;
-#define SUSPEND_NONE	0		/* no suspend pending */
-#define SUSPEND_PENDING	1		/* suspend pending read */
-#define SUSPEND_READ	2		/* suspend read, pending ack */
-#define SUSPEND_ACKED	3		/* suspend acked */
-#define SUSPEND_DONE	4		/* suspend completed */
-
-	struct apm_queue	queue;
-};
-
-/*
- * Local variables
- */
-static int suspends_pending;
-
-static DECLARE_WAIT_QUEUE_HEAD(apm_waitqueue);
-static DECLARE_WAIT_QUEUE_HEAD(apm_suspend_waitqueue);
-
-/*
- * This is a list of everyone who has opened /dev/apm_bios
- */
-static DECLARE_RWSEM(user_list_lock);
-static LIST_HEAD(apm_user_list);
-
-/*
- * kapmd info.  kapmd provides us a process context to handle
- * "APM" events within - specifically necessary if we're going
- * to be suspending the system.
- */
-static DECLARE_WAIT_QUEUE_HEAD(kapmd_wait);
-static DECLARE_COMPLETION(kapmd_exit);
-static DEFINE_SPINLOCK(kapmd_queue_lock);
-static struct apm_queue kapmd_queue;
-
-int apm_suspended;
-EXPORT_SYMBOL(apm_suspended);
-
-/* Platform-specific apm_read_proc(). */
-int (*apm_get_info)(char *buf, char **start, off_t fpos, int length);
-EXPORT_SYMBOL(apm_get_info);
-
-/*
- * APM event queue management.
- */
-static inline int queue_empty(struct apm_queue *q)
-{
-	return q->event_head == q->event_tail;
-}
-
-static inline apm_event_t queue_get_event(struct apm_queue *q)
-{
-	q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
-	return q->events[q->event_tail];
-}
-
-static void queue_add_event(struct apm_queue *q, apm_event_t event)
-{
-	q->event_head = (q->event_head + 1) % APM_MAX_EVENTS;
-	if (q->event_head == q->event_tail) {
-		static int notified;
-
-		if (notified++ == 0)
-			printk(KERN_ERR "apm: an event queue overflowed\n");
-
-		q->event_tail = (q->event_tail + 1) % APM_MAX_EVENTS;
-	}
-	q->events[q->event_head] = event;
-}
-
-static void queue_event_one_user(struct apm_user *as, apm_event_t event)
-{
-	if (as->suser && as->writer) {
-		switch (event) {
-		case APM_SYS_SUSPEND:
-		case APM_USER_SUSPEND:
-			/*
-			 * If this user already has a suspend pending,
-			 * don't queue another one.
-			 */
-			if (as->suspend_state != SUSPEND_NONE)
-				return;
-
-			as->suspend_state = SUSPEND_PENDING;
-			suspends_pending++;
-			break;
-		}
-	}
-	queue_add_event(&as->queue, event);
-}
-
-static void queue_event(apm_event_t event, struct apm_user *sender)
-{
-	struct apm_user *as;
-
-	down_read(&user_list_lock);
-
-	list_for_each_entry(as, &apm_user_list, list)
-		if (as != sender && as->reader)
-			queue_event_one_user(as, event);
-
-	up_read(&user_list_lock);
-	wake_up_interruptible(&apm_waitqueue);
-}
-
-/**
- * apm_queue_event - queue an APM event for kapmd
- * @event: APM event
- *
- * Queue an APM event for kapmd to process and ultimately take the
- * appropriate action.  Only a subset of events are handled:
- *   %APM_LOW_BATTERY
- *   %APM_POWER_STATUS_CHANGE
- *   %APM_USER_SUSPEND
- *   %APM_SYS_SUSPEND
- *   %APM_CRITICAL_SUSPEND
- */
-void apm_queue_event(apm_event_t event)
-{
-	spin_lock_irq(&kapmd_queue_lock);
-	queue_add_event(&kapmd_queue, event);
-	spin_unlock_irq(&kapmd_queue_lock);
-
-	wake_up_interruptible(&kapmd_wait);
-}
-EXPORT_SYMBOL(apm_queue_event);
-
-static void apm_suspend(void)
-{
-	struct apm_user *as;
-	int err;
-
-	apm_suspended = 1;
-	err = pm_suspend(PM_SUSPEND_MEM);
-
-	/*
-	 * Anyone on the APM queues will think we're still suspended.
-	 * Send a message so everyone knows we're now awake again.
-	 */
-	queue_event(APM_NORMAL_RESUME, NULL);
-
-	/*
-	 * Finally, wake up anyone who is sleeping on the suspend.
-	 */
-	down_read(&user_list_lock);
-	list_for_each_entry(as, &apm_user_list, list) {
-		as->suspend_result = err;
-		as->suspend_state = SUSPEND_DONE;
-	}
-	up_read(&user_list_lock);
-
-	wake_up(&apm_suspend_waitqueue);
-	apm_suspended = 0;
-}
-
-static ssize_t apm_read(struct file *fp, char __user *buf,
-			size_t count, loff_t *ppos)
-{
-	struct apm_user *as = fp->private_data;
-	apm_event_t event;
-	int i = count, ret = 0;
-
-	if (count < sizeof(apm_event_t))
-		return -EINVAL;
-
-	if (queue_empty(&as->queue) && fp->f_flags & O_NONBLOCK)
-		return -EAGAIN;
-
-	wait_event_interruptible(apm_waitqueue, !queue_empty(&as->queue));
-
-	while ((i >= sizeof(event)) && !queue_empty(&as->queue)) {
-		event = queue_get_event(&as->queue);
-
-		ret = -EFAULT;
-		if (copy_to_user(buf, &event, sizeof(event)))
-			break;
-
-		if (event == APM_SYS_SUSPEND || event == APM_USER_SUSPEND)
-			as->suspend_state = SUSPEND_READ;
-
-		buf += sizeof(event);
-		i -= sizeof(event);
-	}
-
-	if (i < count)
-		ret = count - i;
-
-	return ret;
-}
-
-static unsigned int apm_poll(struct file *fp, poll_table * wait)
-{
-	struct apm_user *as = fp->private_data;
-
-	poll_wait(fp, &apm_waitqueue, wait);
-	return queue_empty(&as->queue) ? 0 : POLLIN | POLLRDNORM;
-}
-
-/*
- * apm_ioctl - handle APM ioctl
- *
- * APM_IOC_SUSPEND
- *   This IOCTL is overloaded, and performs two functions.  It is used to:
- *     - initiate a suspend
- *     - acknowledge a suspend read from /dev/apm_bios.
- *   Only when everyone who has opened /dev/apm_bios with write permission
- *   has acknowledge does the actual suspend happen.
- */
-static int
-apm_ioctl(struct inode * inode, struct file *filp, u_int cmd, u_long arg)
-{
-	struct apm_user *as = filp->private_data;
-	unsigned long flags;
-	int err = -EINVAL;
-
-	if (!as->suser || !as->writer)
-		return -EPERM;
-
-	switch (cmd) {
-	case APM_IOC_SUSPEND:
-		as->suspend_result = -EINTR;
-
-		if (as->suspend_state == SUSPEND_READ) {
-			/*
-			 * If we read a suspend command from /dev/apm_bios,
-			 * then the corresponding APM_IOC_SUSPEND ioctl is
-			 * interpreted as an acknowledge.
-			 */
-			as->suspend_state = SUSPEND_ACKED;
-			suspends_pending--;
-		} else {
-			/*
-			 * Otherwise it is a request to suspend the system.
-			 * Queue an event for all readers, and expect an
-			 * acknowledge from all writers who haven't already
-			 * acknowledged.
-			 */
-			queue_event(APM_USER_SUSPEND, as);
-		}
-
-		/*
-		 * If there are no further acknowledges required, suspend
-		 * the system.
-		 */
-		if (suspends_pending == 0)
-			apm_suspend();
-
-		/*
-		 * Wait for the suspend/resume to complete.  If there are
-		 * pending acknowledges, we wait here for them.
-		 *
-		 * Note that we need to ensure that the PM subsystem does
-		 * not kick us out of the wait when it suspends the threads.
-		 */
-		flags = current->flags;
-		current->flags |= PF_NOFREEZE;
-
-		/*
-		 * Note: do not allow a thread which is acking the suspend
-		 * to escape until the resume is complete.
-		 */
-		if (as->suspend_state == SUSPEND_ACKED)
-			wait_event(apm_suspend_waitqueue,
-					 as->suspend_state == SUSPEND_DONE);
-		else
-			wait_event_interruptible(apm_suspend_waitqueue,
-					 as->suspend_state == SUSPEND_DONE);
-
-		current->flags = flags;
-		err = as->suspend_result;
-		as->suspend_state = SUSPEND_NONE;
-		break;
-	}
-
-	return err;
-}
-
-static int apm_release(struct inode * inode, struct file * filp)
-{
-	struct apm_user *as = filp->private_data;
-	filp->private_data = NULL;
-
-	down_write(&user_list_lock);
-	list_del(&as->list);
-	up_write(&user_list_lock);
-
-	/*
-	 * We are now unhooked from the chain.  As far as new
-	 * events are concerned, we no longer exist.  However, we
-	 * need to balance suspends_pending, which means the
-	 * possibility of sleeping.
-	 */
-	if (as->suspend_state != SUSPEND_NONE) {
-		suspends_pending -= 1;
-		if (suspends_pending == 0)
-			apm_suspend();
-	}
-
-	kfree(as);
-	return 0;
-}
-
-static int apm_open(struct inode * inode, struct file * filp)
-{
-	struct apm_user *as;
-
-	as = kzalloc(sizeof(*as), GFP_KERNEL);
-	if (as) {
-		/*
-		 * XXX - this is a tiny bit broken, when we consider BSD
-		 * process accounting. If the device is opened by root, we
-		 * instantly flag that we used superuser privs. Who knows,
-		 * we might close the device immediately without doing a
-		 * privileged operation -- cevans
-		 */
-		as->suser = capable(CAP_SYS_ADMIN);
-		as->writer = (filp->f_mode & FMODE_WRITE) == FMODE_WRITE;
-		as->reader = (filp->f_mode & FMODE_READ) == FMODE_READ;
-
-		down_write(&user_list_lock);
-		list_add(&as->list, &apm_user_list);
-		up_write(&user_list_lock);
-
-		filp->private_data = as;
-	}
-
-	return as ? 0 : -ENOMEM;
-}
-
-static struct file_operations apm_bios_fops = {
-	.owner		= THIS_MODULE,
-	.read		= apm_read,
-	.poll		= apm_poll,
-	.ioctl		= apm_ioctl,
-	.open		= apm_open,
-	.release	= apm_release,
-};
-
-static struct miscdevice apm_device = {
-	.minor		= APM_MINOR_DEV,
-	.name		= "apm_bios",
-	.fops		= &apm_bios_fops
-};
-
-
-#ifdef CONFIG_PROC_FS
-/*
- * Arguments, with symbols from linux/apm_bios.h.
- *
- *   0) Linux driver version (this will change if format changes)
- *   1) APM BIOS Version.  Usually 1.0, 1.1 or 1.2.
- *   2) APM flags from APM Installation Check (0x00):
- *	bit 0: APM_16_BIT_SUPPORT
- *	bit 1: APM_32_BIT_SUPPORT
- *	bit 2: APM_IDLE_SLOWS_CLOCK
- *	bit 3: APM_BIOS_DISABLED
- *	bit 4: APM_BIOS_DISENGAGED
- *   3) AC line status
- *	0x00: Off-line
- *	0x01: On-line
- *	0x02: On backup power (BIOS >= 1.1 only)
- *	0xff: Unknown
- *   4) Battery status
- *	0x00: High
- *	0x01: Low
- *	0x02: Critical
- *	0x03: Charging
- *	0x04: Selected battery not present (BIOS >= 1.2 only)
- *	0xff: Unknown
- *   5) Battery flag
- *	bit 0: High
- *	bit 1: Low
- *	bit 2: Critical
- *	bit 3: Charging
- *	bit 7: No system battery
- *	0xff: Unknown
- *   6) Remaining battery life (percentage of charge):
- *	0-100: valid
- *	-1: Unknown
- *   7) Remaining battery life (time units):
- *	Number of remaining minutes or seconds
- *	-1: Unknown
- *   8) min = minutes; sec = seconds
- */
-static int apm_read_proc(char *buf, char **start, off_t fpos, int length)
-{
-	if (likely(apm_get_info))
-		return apm_get_info(buf, start, fpos, length);
-
-	return -EINVAL;
-}
-#endif
-
-static int kapmd(void *arg)
-{
-	daemonize("kapmd");
-	current->flags |= PF_NOFREEZE;
-
-	do {
-		apm_event_t event;
-
-		wait_event_interruptible(kapmd_wait,
-				!queue_empty(&kapmd_queue) || !pm_active);
-
-		if (!pm_active)
-			break;
-
-		spin_lock_irq(&kapmd_queue_lock);
-		event = 0;
-		if (!queue_empty(&kapmd_queue))
-			event = queue_get_event(&kapmd_queue);
-		spin_unlock_irq(&kapmd_queue_lock);
-
-		switch (event) {
-		case 0:
-			break;
-
-		case APM_LOW_BATTERY:
-		case APM_POWER_STATUS_CHANGE:
-			queue_event(event, NULL);
-			break;
-
-		case APM_USER_SUSPEND:
-		case APM_SYS_SUSPEND:
-			queue_event(event, NULL);
-			if (suspends_pending == 0)
-				apm_suspend();
-			break;
-
-		case APM_CRITICAL_SUSPEND:
-			apm_suspend();
-			break;
-		}
-	} while (1);
-
-	complete_and_exit(&kapmd_exit, 0);
-}
-
-static int __init apm_init(void)
-{
-	int ret;
-
-	pm_active = 1;
-
-	ret = kernel_thread(kapmd, NULL, CLONE_KERNEL);
-	if (unlikely(ret < 0)) {
-		pm_active = 0;
-		return ret;
-	}
-
-	create_proc_info_entry("apm", 0, NULL, apm_read_proc);
-
-	ret = misc_register(&apm_device);
-	if (unlikely(ret != 0)) {
-		remove_proc_entry("apm", NULL);
-
-		pm_active = 0;
-		wake_up(&kapmd_wait);
-		wait_for_completion(&kapmd_exit);
-	}
-
-	return ret;
-}
-
-static void __exit apm_exit(void)
-{
-	misc_deregister(&apm_device);
-	remove_proc_entry("apm", NULL);
-
-	pm_active = 0;
-	wake_up(&kapmd_wait);
-	wait_for_completion(&kapmd_exit);
-}
-
-module_init(apm_init);
-module_exit(apm_exit);
-
-MODULE_AUTHOR("Stephen Rothwell, Andriy Skulysh");
-MODULE_DESCRIPTION("Advanced Power Management");
-MODULE_LICENSE("GPL");
diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 0326ca1a848..ae8567cc529 100644
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -60,6 +60,8 @@ obj-$(CONFIG_BRIQ_PANEL)	+= briq_panel.o
 obj-$(CONFIG_PRINTER)		+= lp.o
 obj-$(CONFIG_TIPAR)		+= tipar.o
 
+obj-$(CONFIG_APM_EMULATION)	+= apm-emulation.o
+
 obj-$(CONFIG_DTLK)		+= dtlk.o
 obj-$(CONFIG_R3964)		+= n_r3964.o
 obj-$(CONFIG_APPLICOM)		+= applicom.o
diff --git a/arch/arm/kernel/apm.c b/drivers/char/apm-emulation.c
index 2c37b70b17a..179c7a3b6e7 100644
--- a/arch/arm/kernel/apm.c
+++ b/drivers/char/apm-emulation.c
@@ -1,5 +1,5 @@
 /*
- * bios-less APM driver for ARM Linux 
+ * bios-less APM driver for ARM Linux
  *  Jamey Hicks <jamey@crl.dec.com>
  *  adapted from the APM BIOS driver for Linux by Stephen Rothwell (sfr@linuxcare.com)
  *
@@ -19,6 +19,7 @@
 #include <linux/capability.h>
 #include <linux/sched.h>
 #include <linux/pm.h>
+#include <linux/apm-emulation.h>
 #include <linux/device.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
@@ -27,7 +28,6 @@
 #include <linux/kthread.h>
 #include <linux/delay.h>
 
-#include <asm/apm.h> /* apm_power_info */
 #include <asm/system.h>
 
 /*
@@ -225,7 +225,7 @@ static void apm_suspend(void)
 	list_for_each_entry(as, &apm_user_list, list) {
 		if (as->suspend_state == SUSPEND_WAIT ||
 		    as->suspend_state == SUSPEND_ACKED) {
-	  		as->suspend_result = err;
+			as->suspend_result = err;
 			as->suspend_state = SUSPEND_DONE;
 		}
 	}
@@ -529,7 +529,7 @@ static int apm_get_info(char *buf, char **start, off_t fpos, int length)
 		     info.battery_flag, info.battery_life,
 		     info.time, units);
 
- 	return ret;
+	return ret;
 }
 #endif
 
diff --git a/include/asm-arm/apm.h b/include/asm-arm/apm.h
deleted file mode 100644
index d09113b37e4..00000000000
--- a/include/asm-arm/apm.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/* -*- linux-c -*-
- *
- * (C) 2003 zecke@handhelds.org
- *
- * GPL version 2
- *
- * based on arch/arm/kernel/apm.c
- * factor out the information needed by architectures to provide
- * apm status
- *
- *
- */
-#ifndef ARM_ASM_SA1100_APM_H
-#define ARM_ASM_SA1100_APM_H
-
-#include <linux/apm_bios.h>
-
-/*
- * This structure gets filled in by the machine specific 'get_power_status'
- * implementation.  Any fields which are not set default to a safe value.
- */
-struct apm_power_info {
-	unsigned char	ac_line_status;
-#define APM_AC_OFFLINE			0
-#define APM_AC_ONLINE			1
-#define APM_AC_BACKUP			2
-#define APM_AC_UNKNOWN			0xff
-
-	unsigned char	battery_status;
-#define APM_BATTERY_STATUS_HIGH		0
-#define APM_BATTERY_STATUS_LOW		1
-#define APM_BATTERY_STATUS_CRITICAL	2
-#define APM_BATTERY_STATUS_CHARGING	3
-#define APM_BATTERY_STATUS_NOT_PRESENT	4
-#define APM_BATTERY_STATUS_UNKNOWN	0xff
-
-	unsigned char	battery_flag;
-#define APM_BATTERY_FLAG_HIGH		(1 << 0)
-#define APM_BATTERY_FLAG_LOW		(1 << 1)
-#define APM_BATTERY_FLAG_CRITICAL	(1 << 2)
-#define APM_BATTERY_FLAG_CHARGING	(1 << 3)
-#define APM_BATTERY_FLAG_NOT_PRESENT	(1 << 7)
-#define APM_BATTERY_FLAG_UNKNOWN	0xff
-
-	int		battery_life;
-	int		time;
-	int		units;
-#define APM_UNITS_MINS			0
-#define APM_UNITS_SECS			1
-#define APM_UNITS_UNKNOWN		-1
-
-};
-
-/*
- * This allows machines to provide their own "apm get power status" function.
- */
-extern void (*apm_get_power_status)(struct apm_power_info *);
-
-/*
- * Queue an event (APM_SYS_SUSPEND or APM_CRITICAL_SUSPEND)
- */
-void apm_queue_event(apm_event_t event);
-
-#endif
diff --git a/include/asm-sh/apm.h b/include/asm-sh/apm.h
deleted file mode 100644
index 8b091e93651..00000000000
--- a/include/asm-sh/apm.h
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright 2006 (c) Andriy Skulysh <askulysh@gmail.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- */
-
-#ifndef __ASM_SH_APM_H
-#define __ASM_SH_APM_H
-
-#define APM_AC_OFFLINE			0
-#define APM_AC_ONLINE			1
-#define APM_AC_BACKUP			2
-#define APM_AC_UNKNOWN			0xff
-
-#define APM_BATTERY_STATUS_HIGH		0
-#define APM_BATTERY_STATUS_LOW		1
-#define APM_BATTERY_STATUS_CRITICAL	2
-#define APM_BATTERY_STATUS_CHARGING	3
-#define APM_BATTERY_STATUS_NOT_PRESENT	4
-#define APM_BATTERY_STATUS_UNKNOWN	0xff
-
-#define APM_BATTERY_LIFE_UNKNOWN	0xFFFF
-#define APM_BATTERY_LIFE_MINUTES	0x8000
-#define APM_BATTERY_LIFE_VALUE_MASK	0x7FFF
-
-#define APM_BATTERY_FLAG_HIGH		(1 << 0)
-#define APM_BATTERY_FLAG_LOW		(1 << 1)
-#define APM_BATTERY_FLAG_CRITICAL	(1 << 2)
-#define APM_BATTERY_FLAG_CHARGING	(1 << 3)
-#define APM_BATTERY_FLAG_NOT_PRESENT	(1 << 7)
-#define APM_BATTERY_FLAG_UNKNOWN	0xff
-
-#define APM_UNITS_MINS			0
-#define APM_UNITS_SECS			1
-#define APM_UNITS_UNKNOWN		-1
-
-
-extern int (*apm_get_info)(char *buf, char **start, off_t fpos, int length);
-extern int apm_suspended;
-
-void apm_queue_event(apm_event_t event);
-
-#endif
diff --git a/include/asm-mips/apm.h b/include/linux/apm-emulation.h
index 4b99ffc1152..e6d800358dd 100644
--- a/include/asm-mips/apm.h
+++ b/include/linux/apm-emulation.h
@@ -7,11 +7,9 @@
  * based on arch/arm/kernel/apm.c
  * factor out the information needed by architectures to provide
  * apm status
- *
- *
  */
-#ifndef MIPS_ASM_SA1100_APM_H
-#define MIPS_ASM_SA1100_APM_H
+#ifndef __LINUX_APM_EMULATION_H
+#define __LINUX_APM_EMULATION_H
 
 #include <linux/apm_bios.h>
 
@@ -61,4 +59,4 @@ extern void (*apm_get_power_status)(struct apm_power_info *);
  */
 void apm_queue_event(apm_event_t event);
 
-#endif
+#endif /* __LINUX_APM_EMULATION_H */
diff --git a/kernel/power/Kconfig b/kernel/power/Kconfig
index ed296225dcd..95f6657fff7 100644
--- a/kernel/power/Kconfig
+++ b/kernel/power/Kconfig
@@ -131,3 +131,29 @@ config SUSPEND_SMP
 	bool
 	depends on HOTPLUG_CPU && X86 && PM
 	default y
+
+config APM_EMULATION
+	tristate "Advanced Power Management Emulation"
+	depends on PM && SYS_SUPPORTS_APM_EMULATION
+	help
+	  APM is a BIOS specification for saving power using several different
+	  techniques. This is mostly useful for battery powered laptops with
+	  APM compliant BIOSes. If you say Y here, the system time will be
+	  reset after a RESUME operation, the /proc/apm device will provide
+	  battery status information, and user-space programs will receive
+	  notification of APM "events" (e.g. battery status change).
+
+	  In order to use APM, you will need supporting software. For location
+	  and more information, read <file:Documentation/pm.txt> and the
+	  Battery Powered Linux mini-HOWTO, available from
+	  <http://www.tldp.org/docs.html#howto>.
+
+	  This driver does not spin down disk drives (see the hdparm(8)
+	  manpage ("man 8 hdparm") for that), and it doesn't turn off
+	  VESA-compliant "green" monitors.
+
+	  Generally, if you don't have a battery in your machine, there isn't
+	  much point in using this driver and you should say N. If you get
+	  random kernel OOPSes or reboots that don't seem to be related to
+	  anything, try disabling/enabling this option (or disabling/enabling
+	  APM in your BIOS).