[linux-block.git] / arch / arm / plat-samsung / pm.c

/* linux/arch/arm/plat-s3c/pm.c
 *
 * Copyright 2008 Openmoko, Inc.
 * Copyright 2004-2008 Simtec Electronics
 *	Ben Dooks <ben@simtec.co.uk>
 *	http://armlinux.simtec.co.uk/
 *
 * S3C common power management (suspend to ram) support.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
*/

#include <linux/init.h>
#include <linux/suspend.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/serial_core.h>
#include <linux/io.h>

#include <asm/cacheflush.h>
#include <mach/hardware.h>
#include <mach/map.h>

#include <plat/regs-serial.h>
#include <mach/regs-clock.h>
#include <mach/regs-irq.h>
#include <asm/irq.h>

#include <plat/pm.h>
#include <mach/pm-core.h>

/* for external use */

unsigned long s3c_pm_flags;

/* Debug code:
 *
 * This code supports debug output to the low level UARTs for use on
 * resume before the console layer is available.
*/

#ifdef CONFIG_SAMSUNG_PM_DEBUG
extern void printascii(const char *);

void s3c_pm_dbg(const char *fmt, ...)
{
	va_list va;
	char buff[256];

	va_start(va, fmt);
	vsprintf(buff, fmt, va);
	va_end(va);

	printascii(buff);
}

static inline void s3c_pm_debug_init(void)
{
	/* restart uart clocks so we can use them to output */
	s3c_pm_debug_init_uart();
}

#else
#define s3c_pm_debug_init() do { } while(0)

#endif /* CONFIG_SAMSUNG_PM_DEBUG */

/* Save the UART configurations if we are configured for debug. */

unsigned char pm_uart_udivslot;

#ifdef CONFIG_SAMSUNG_PM_DEBUG

struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];

static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
{
	void __iomem *regs = S3C_VA_UARTx(uart);

	save->ulcon = __raw_readl(regs + S3C2410_ULCON);
	save->ucon = __raw_readl(regs + S3C2410_UCON);
	save->ufcon = __raw_readl(regs + S3C2410_UFCON);
	save->umcon = __raw_readl(regs + S3C2410_UMCON);
	save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);

	if (pm_uart_udivslot)
		save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);

	S3C_PMDBG("UART[%d]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",
		  uart, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);
}

static void s3c_pm_save_uarts(void)
{
	struct pm_uart_save *save = uart_save;
	unsigned int uart;

	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
		s3c_pm_save_uart(uart, save);
}

static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
{
	void __iomem *regs = S3C_VA_UARTx(uart);

	s3c_pm_arch_update_uart(regs, save);

	__raw_writel(save->ulcon, regs + S3C2410_ULCON);
	__raw_writel(save->ucon,  regs + S3C2410_UCON);
	__raw_writel(save->ufcon, regs + S3C2410_UFCON);
	__raw_writel(save->umcon, regs + S3C2410_UMCON);
	__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);

	if (pm_uart_udivslot)
		__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);
}

static void s3c_pm_restore_uarts(void)
{
	struct pm_uart_save *save = uart_save;
	unsigned int uart;

	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
		s3c_pm_restore_uart(uart, save);
}
#else
static void s3c_pm_save_uarts(void) { }
static void s3c_pm_restore_uarts(void) { }
#endif

/* The IRQ ext-int code goes here, it is too small to currently bother
 * with its own file. */

unsigned long s3c_irqwake_intmask	= 0xffffffffL;
unsigned long s3c_irqwake_eintmask	= 0xffffffffL;

int s3c_irqext_wake(struct irq_data *data, unsigned int state)
{
	unsigned long bit = 1L << IRQ_EINT_BIT(data->irq);

	if (!(s3c_irqwake_eintallow & bit))
		return -ENOENT;

	printk(KERN_INFO "wake %s for irq %d\n",
	       state ? "enabled" : "disabled", data->irq);

	if (!state)
		s3c_irqwake_eintmask |= bit;
	else
		s3c_irqwake_eintmask &= ~bit;

	return 0;
}

/* helper functions to save and restore register state */

/**
 * s3c_pm_do_save() - save a set of registers for restoration on resume.
 * @ptr: Pointer to an array of registers.
 * @count: Size of the ptr array.
 *
 * Run through the list of registers given, saving their contents in the
 * array for later restoration when we wakeup.
 */
void s3c_pm_do_save(struct sleep_save *ptr, int count)
{
	for (; count > 0; count--, ptr++) {
		ptr->val = __raw_readl(ptr->reg);
		S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
	}
}

/**
 * s3c_pm_do_restore() - restore register values from the save list.
 * @ptr: Pointer to an array of registers.
 * @count: Size of the ptr array.
 *
 * Restore the register values saved from s3c_pm_do_save().
 *
 * Note, we do not use S3C_PMDBG() in here, as the system may not have
 * restore the UARTs state yet
*/

void s3c_pm_do_restore(struct sleep_save *ptr, int count)
{
	for (; count > 0; count--, ptr++) {
		printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
		       ptr->reg, ptr->val, __raw_readl(ptr->reg));

		__raw_writel(ptr->val, ptr->reg);
	}
}

/**
 * s3c_pm_do_restore_core() - early restore register values from save list.
 *
 * This is similar to s3c_pm_do_restore() except we try and minimise the
 * side effects of the function in case registers that hardware might need
 * to work has been restored.
 *
 * WARNING: Do not put any debug in here that may effect memory or use
 * peripherals, as things may be changing!
*/

void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
{
	for (; count > 0; count--, ptr++)
		__raw_writel(ptr->val, ptr->reg);
}

/* s3c2410_pm_show_resume_irqs
 *
 * print any IRQs asserted at resume time (ie, we woke from)
*/
static void __maybe_unused s3c_pm_show_resume_irqs(int start,
						   unsigned long which,
						   unsigned long mask)
{
	int i;

	which &= ~mask;

	for (i = 0; i <= 31; i++) {
		if (which & (1L<<i)) {
			S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
		}
	}
}


void (*pm_cpu_prep)(void);
void (*pm_cpu_sleep)(unsigned long);

#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))

/* s3c_pm_enter
 *
 * central control for sleep/resume process
*/

static int s3c_pm_enter(suspend_state_t state)
{
	/* ensure the debug is initialised (if enabled) */

	s3c_pm_debug_init();

	S3C_PMDBG("%s(%d)\n", __func__, state);

	if (pm_cpu_prep == NULL || pm_cpu_sleep == NULL) {
		printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__);
		return -EINVAL;
	}

	/* check if we have anything to wake-up with... bad things seem
	 * to happen if you suspend with no wakeup (system will often
	 * require a full power-cycle)
	*/

	if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
	    !any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
		printk(KERN_ERR "%s: No wake-up sources!\n", __func__);
		printk(KERN_ERR "%s: Aborting sleep\n", __func__);
		return -EINVAL;
	}

	/* save all necessary core registers not covered by the drivers */

	s3c_pm_save_gpios();
	s3c_pm_save_uarts();
	s3c_pm_save_core();

	/* set the irq configuration for wake */

	s3c_pm_configure_extint();

	S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
	    s3c_irqwake_intmask, s3c_irqwake_eintmask);

	s3c_pm_arch_prepare_irqs();

	/* call cpu specific preparation */

	pm_cpu_prep();

	/* flush cache back to ram */

	flush_cache_all();

	s3c_pm_check_store();

	/* send the cpu to sleep... */

	s3c_pm_arch_stop_clocks();

	/* this will also act as our return point from when
	 * we resume as it saves its own register state and restores it
	 * during the resume.  */

	cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, 0, pm_cpu_sleep);

	/* restore the system state */

	s3c_pm_restore_core();
	s3c_pm_restore_uarts();
	s3c_pm_restore_gpios();

	s3c_pm_debug_init();

	/* check what irq (if any) restored the system */

	s3c_pm_arch_show_resume_irqs();

	S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);

	/* LEDs should now be 1110 */
	s3c_pm_debug_smdkled(1 << 1, 0);

	s3c_pm_check_restore();

	/* ok, let's return from sleep */

	S3C_PMDBG("S3C PM Resume (post-restore)\n");
	return 0;
}

static int s3c_pm_prepare(void)
{
	/* prepare check area if configured */

	s3c_pm_check_prepare();
	return 0;
}

static void s3c_pm_finish(void)
{
	s3c_pm_check_cleanup();
}

static const struct platform_suspend_ops s3c_pm_ops = {
	.enter		= s3c_pm_enter,
	.prepare	= s3c_pm_prepare,
	.finish		= s3c_pm_finish,
	.valid		= suspend_valid_only_mem,
};

/* s3c_pm_init
 *
 * Attach the power management functions. This should be called
 * from the board specific initialisation if the board supports
 * it.
*/

int __init s3c_pm_init(void)
{
	printk("S3C Power Management, Copyright 2004 Simtec Electronics\n");

	suspend_set_ops(&s3c_pm_ops);
	return 0;
}
Commit	Line	Data
6419711a BD	1	/* linux/arch/arm/plat-s3c/pm.c
	2	*
	3	* Copyright 2008 Openmoko, Inc.
ccae941e	4	* Copyright 2004-2008 Simtec Electronics
6419711a BD	5	* Ben Dooks <ben@simtec.co.uk>
	6	* http://armlinux.simtec.co.uk/
	7	*
	8	* S3C common power management (suspend to ram) support.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*/
	14
	15	#include <linux/init.h>
	16	#include <linux/suspend.h>
	17	#include <linux/errno.h>
2261e0e6 BD	18	#include <linux/delay.h>
2261e0e6 BD	19	#include <linux/serial_core.h>
6419711a BD	20	#include <linux/io.h>
6419711a BD	21
2261e0e6 BD	22	#include <asm/cacheflush.h>
2261e0e6 BD	23	#include <mach/hardware.h>
bd117bd1	24	#include <mach/map.h>
2261e0e6 BD	25
	26	#include <plat/regs-serial.h>
	27	#include <mach/regs-clock.h>
2261e0e6	28	#include <mach/regs-irq.h>
56b34426	29	#include <asm/irq.h>
2261e0e6	30
6419711a	31	#include <plat/pm.h>
431fb7df	32	#include <mach/pm-core.h>
6419711a BD	33
	34	/* for external use */
	35
	36	unsigned long s3c_pm_flags;
	37
2261e0e6 BD	38	/* Debug code:
	39	*
	40	* This code supports debug output to the low level UARTs for use on
	41	* resume before the console layer is available.
	42	*/
	43
8005745d	44	#ifdef CONFIG_SAMSUNG_PM_DEBUG
6419711a BD	45	extern void printascii(const char *);
	46
	47	void s3c_pm_dbg(const char *fmt, ...)
	48	{
	49	va_list va;
	50	char buff[256];
	51
	52	va_start(va, fmt);
	53	vsprintf(buff, fmt, va);
	54	va_end(va);
	55
	56	printascii(buff);
	57	}
2261e0e6 BD	58
	59	static inline void s3c_pm_debug_init(void)
	60	{
	61	/* restart uart clocks so we can use them to output */
	62	s3c_pm_debug_init_uart();
	63	}
	64
	65	#else
	66	#define s3c_pm_debug_init() do { } while(0)
	67
8005745d	68	#endif /* CONFIG_SAMSUNG_PM_DEBUG */
6419711a	69
2261e0e6 BD	70	/* Save the UART configurations if we are configured for debug. */
2261e0e6 BD	71
4b637dc2 BD	72	unsigned char pm_uart_udivslot;
4b637dc2 BD	73
8005745d	74	#ifdef CONFIG_SAMSUNG_PM_DEBUG
2261e0e6	75
d2b07fe2 BD	76	struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
	77
	78	static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
	79	{
	80	void __iomem *regs = S3C_VA_UARTx(uart);
	81
	82	save->ulcon = __raw_readl(regs + S3C2410_ULCON);
	83	save->ucon = __raw_readl(regs + S3C2410_UCON);
	84	save->ufcon = __raw_readl(regs + S3C2410_UFCON);
	85	save->umcon = __raw_readl(regs + S3C2410_UMCON);
	86	save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
57699e9a	87
4b637dc2 BD	88	if (pm_uart_udivslot)
	89	save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);
	90
57699e9a BD	91	S3C_PMDBG("UART[%d]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",
57699e9a BD	92	uart, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);
d2b07fe2	93	}
2261e0e6	94
d2b07fe2	95	static void s3c_pm_save_uarts(void)
2261e0e6	96	{
d2b07fe2 BD	97	struct pm_uart_save *save = uart_save;
	98	unsigned int uart;
	99
	100	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
	101	s3c_pm_save_uart(uart, save);
	102	}
	103
	104	static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
	105	{
	106	void __iomem *regs = S3C_VA_UARTx(uart);
	107
57699e9a BD	108	s3c_pm_arch_update_uart(regs, save);
57699e9a BD	109
d2b07fe2 BD	110	__raw_writel(save->ulcon, regs + S3C2410_ULCON);
	111	__raw_writel(save->ucon, regs + S3C2410_UCON);
	112	__raw_writel(save->ufcon, regs + S3C2410_UFCON);
	113	__raw_writel(save->umcon, regs + S3C2410_UMCON);
	114	__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);
4b637dc2 BD	115
	116	if (pm_uart_udivslot)
	117	__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);
2261e0e6 BD	118	}
2261e0e6 BD	119
d2b07fe2	120	static void s3c_pm_restore_uarts(void)
2261e0e6	121	{
d2b07fe2 BD	122	struct pm_uart_save *save = uart_save;
	123	unsigned int uart;
	124
	125	for (uart = 0; uart < CONFIG_SERIAL_SAMSUNG_UARTS; uart++, save++)
	126	s3c_pm_restore_uart(uart, save);
2261e0e6 BD	127	}
2261e0e6 BD	128	#else
d2b07fe2 BD	129	static void s3c_pm_save_uarts(void) { }
d2b07fe2 BD	130	static void s3c_pm_restore_uarts(void) { }
2261e0e6 BD	131	#endif
2261e0e6 BD	132
56b34426 BD	133	/* The IRQ ext-int code goes here, it is too small to currently bother
	134	* with its own file. */
	135
	136	unsigned long s3c_irqwake_intmask = 0xffffffffL;
	137	unsigned long s3c_irqwake_eintmask = 0xffffffffL;
	138
f5aeffb7	139	int s3c_irqext_wake(struct irq_data *data, unsigned int state)
56b34426	140	{
f5aeffb7	141	unsigned long bit = 1L << IRQ_EINT_BIT(data->irq);
56b34426 BD	142
	143	if (!(s3c_irqwake_eintallow & bit))
	144	return -ENOENT;
	145
	146	printk(KERN_INFO "wake %s for irq %d\n",
f5aeffb7	147	state ? "enabled" : "disabled", data->irq);
56b34426 BD	148
	149	if (!state)
	150	s3c_irqwake_eintmask \|= bit;
	151	else
	152	s3c_irqwake_eintmask &= ~bit;
	153
	154	return 0;
	155	}
6419711a BD	156
	157	/* helper functions to save and restore register state */
	158
	159	/**
	160	* s3c_pm_do_save() - save a set of registers for restoration on resume.
	161	* @ptr: Pointer to an array of registers.
	162	* @count: Size of the ptr array.
	163	*
	164	* Run through the list of registers given, saving their contents in the
	165	* array for later restoration when we wakeup.
	166	*/
	167	void s3c_pm_do_save(struct sleep_save *ptr, int count)
	168	{
	169	for (; count > 0; count--, ptr++) {
	170	ptr->val = __raw_readl(ptr->reg);
	171	S3C_PMDBG("saved %p value %08lx\n", ptr->reg, ptr->val);
	172	}
	173	}
	174
	175	/**
	176	* s3c_pm_do_restore() - restore register values from the save list.
	177	* @ptr: Pointer to an array of registers.
	178	* @count: Size of the ptr array.
	179	*
	180	* Restore the register values saved from s3c_pm_do_save().
	181	*
	182	* Note, we do not use S3C_PMDBG() in here, as the system may not have
	183	* restore the UARTs state yet
	184	*/
	185
	186	void s3c_pm_do_restore(struct sleep_save *ptr, int count)
	187	{
	188	for (; count > 0; count--, ptr++) {
	189	printk(KERN_DEBUG "restore %p (restore %08lx, was %08x)\n",
	190	ptr->reg, ptr->val, __raw_readl(ptr->reg));
	191
	192	__raw_writel(ptr->val, ptr->reg);
	193	}
	194	}
	195
	196	/**
	197	* s3c_pm_do_restore_core() - early restore register values from save list.
	198	*
	199	* This is similar to s3c_pm_do_restore() except we try and minimise the
	200	* side effects of the function in case registers that hardware might need
	201	* to work has been restored.
	202	*
	203	* WARNING: Do not put any debug in here that may effect memory or use
	204	* peripherals, as things may be changing!
	205	*/
	206
	207	void s3c_pm_do_restore_core(struct sleep_save *ptr, int count)
	208	{
	209	for (; count > 0; count--, ptr++)
	210	__raw_writel(ptr->val, ptr->reg);
	211	}
2261e0e6 BD	212
	213	/* s3c2410_pm_show_resume_irqs
	214	*
	215	* print any IRQs asserted at resume time (ie, we woke from)
	216	*/
baab7307 MC	217	static void __maybe_unused s3c_pm_show_resume_irqs(int start,
	218	unsigned long which,
	219	unsigned long mask)
2261e0e6 BD	220	{
	221	int i;
	222
	223	which &= ~mask;
	224
	225	for (i = 0; i <= 31; i++) {
	226	if (which & (1L<<i)) {
	227	S3C_PMDBG("IRQ %d asserted at resume\n", start+i);
	228	}
	229	}
	230	}
	231
	232
	233	void (*pm_cpu_prep)(void);
e7089da9	234	void (*pm_cpu_sleep)(unsigned long);
2261e0e6 BD	235
	236	#define any_allowed(mask, allow) (((mask) & (allow)) != (allow))
	237
	238	/* s3c_pm_enter
	239	*
	240	* central control for sleep/resume process
	241	*/
	242
	243	static int s3c_pm_enter(suspend_state_t state)
	244	{
2261e0e6 BD	245	/* ensure the debug is initialised (if enabled) */
	246
	247	s3c_pm_debug_init();
	248
	249	S3C_PMDBG("%s(%d)\n", __func__, state);
	250
	251	if (pm_cpu_prep == NULL \|\| pm_cpu_sleep == NULL) {
	252	printk(KERN_ERR "%s: error: no cpu sleep function\n", __func__);
	253	return -EINVAL;
	254	}
	255
	256	/* check if we have anything to wake-up with... bad things seem
	257	* to happen if you suspend with no wakeup (system will often
	258	* require a full power-cycle)
	259	*/
	260
	261	if (!any_allowed(s3c_irqwake_intmask, s3c_irqwake_intallow) &&
	262	!any_allowed(s3c_irqwake_eintmask, s3c_irqwake_eintallow)) {
	263	printk(KERN_ERR "%s: No wake-up sources!\n", __func__);
	264	printk(KERN_ERR "%s: Aborting sleep\n", __func__);
	265	return -EINVAL;
	266	}
	267
2261e0e6 BD	268	/* save all necessary core registers not covered by the drivers */
	269
	270	s3c_pm_save_gpios();
d2b07fe2	271	s3c_pm_save_uarts();
2261e0e6 BD	272	s3c_pm_save_core();
	273
	274	/* set the irq configuration for wake */
	275
	276	s3c_pm_configure_extint();
	277
	278	S3C_PMDBG("sleep: irq wakeup masks: %08lx,%08lx\n",
	279	s3c_irqwake_intmask, s3c_irqwake_eintmask);
	280
	281	s3c_pm_arch_prepare_irqs();
	282
	283	/* call cpu specific preparation */
	284
	285	pm_cpu_prep();
	286
	287	/* flush cache back to ram */
	288
	289	flush_cache_all();
	290
	291	s3c_pm_check_store();
	292
	293	/* send the cpu to sleep... */
	294
	295	s3c_pm_arch_stop_clocks();
	296
e7089da9	297	/* this will also act as our return point from when
fff94cd9 BD	298	* we resume as it saves its own register state and restores it
fff94cd9 BD	299	* during the resume. */
2261e0e6	300
e7089da9	301	cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, 0, pm_cpu_sleep);
2261e0e6	302
2261e0e6 BD	303	/* restore the system state */
	304
	305	s3c_pm_restore_core();
d2b07fe2	306	s3c_pm_restore_uarts();
2261e0e6 BD	307	s3c_pm_restore_gpios();
	308
	309	s3c_pm_debug_init();
	310
	311	/* check what irq (if any) restored the system */
	312
	313	s3c_pm_arch_show_resume_irqs();
	314
	315	S3C_PMDBG("%s: post sleep, preparing to return\n", __func__);
	316
bd117bd1 BD	317	/* LEDs should now be 1110 */
	318	s3c_pm_debug_smdkled(1 << 1, 0);
	319
2261e0e6 BD	320	s3c_pm_check_restore();
	321
	322	/* ok, let's return from sleep */
	323
	324	S3C_PMDBG("S3C PM Resume (post-restore)\n");
	325	return 0;
	326	}
	327
aa8aba69 BD	328	static int s3c_pm_prepare(void)
	329	{
	330	/* prepare check area if configured */
	331
	332	s3c_pm_check_prepare();
	333	return 0;
	334	}
	335
	336	static void s3c_pm_finish(void)
	337	{
	338	s3c_pm_check_cleanup();
	339	}
	340
2f55ac07	341	static const struct platform_suspend_ops s3c_pm_ops = {
2261e0e6	342	.enter = s3c_pm_enter,
aa8aba69 BD	343	.prepare = s3c_pm_prepare,
aa8aba69 BD	344	.finish = s3c_pm_finish,
2261e0e6 BD	345	.valid = suspend_valid_only_mem,
	346	};
	347
4e59c25d	348	/* s3c_pm_init
2261e0e6 BD	349	*
	350	* Attach the power management functions. This should be called
	351	* from the board specific initialisation if the board supports
	352	* it.
	353	*/
	354
4e59c25d	355	int __init s3c_pm_init(void)
2261e0e6 BD	356	{
	357	printk("S3C Power Management, Copyright 2004 Simtec Electronics\n");
	358
	359	suspend_set_ops(&s3c_pm_ops);
	360	return 0;
	361	}