diff options
| author | Ben Dooks <ben-linux@fluff.org> | 2008-12-12 01:24:24 +0100 |
|---|---|---|
| committer | Ben Dooks <ben-linux@fluff.org> | 2009-05-07 12:04:55 +0200 |
| commit | 4b637dc231a96a151ea70c27d86b35c7891e2a7c (patch) | |
| tree | 5dbf92b395ca9648035d28e874b9b4de5c115784 /arch/arm/plat-s3c | |
| parent | [ARM] S3C: Add debug to UART save and a per-arch callback pre-restore (diff) | |
| download | linux-4b637dc231a96a151ea70c27d86b35c7891e2a7c.tar.xz linux-4b637dc231a96a151ea70c27d86b35c7891e2a7c.zip | |
[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: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-s3c')
| -rw-r--r-- | arch/arm/plat-s3c/include/plat/pm.h | 3 | ||||
| -rw-r--r-- | arch/arm/plat-s3c/pm.c | 8 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h index 3779775133a9..5f8707e2a09c 100644 --- a/arch/arm/plat-s3c/include/plat/pm.h +++ b/arch/arm/plat-s3c/include/plat/pm.h @@ -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. */ diff --git a/arch/arm/plat-s3c/pm.c b/arch/arm/plat-s3c/pm.c index de4c4aa22468..9957b539600f 100644 --- a/arch/arm/plat-s3c/pm.c +++ b/arch/arm/plat-s3c/pm.c @@ -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) |