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Commit 4b637dc2 authored by Ben Dooks's avatar Ben Dooks
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[ARM] S3C: PM save UART UDIVSLOT if doing PM 



Add the facility to save the UART UDIVSLOT register if the UART
state is being saved over suspend.

Signed-off-by: default avatarBen Dooks <ben-linux@fluff.org>
parent 57699e9a

arch/arm/plat-s3c/include/plat/pm.h

+3 −0
Original line number Diff line number Diff line
@@ -44,6 +44,8 @@ extern void (*pm_cpu_sleep)(void); 


extern unsigned long s3c_pm_flags;



extern unsigned char pm_uart_udivslot;  /* true to save UART UDIVSLOT */



/* from sleep.S */



extern int  s3c_cpu_save(unsigned long *saveblk);
@@ -88,6 +90,7 @@ struct pm_uart_save { 
	u32	ufcon;

	u32	umcon;

	u32	ubrdiv;

	u32	udivslot;

};



/* helper functions to save/restore lists of registers. */

arch/arm/plat-s3c/pm.c

+8 −0
Original line number Diff line number Diff line
@@ -70,6 +70,8 @@ static inline void s3c_pm_debug_init(void) 


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



unsigned char pm_uart_udivslot;



#ifdef CONFIG_S3C2410_PM_DEBUG



struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
@@ -84,6 +86,9 @@ static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save) 
	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);

}
@@ -108,6 +113,9 @@ static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save) 
	__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)