[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>
diff --git a/arch/arm/plat-s3c/include/plat/pm.h b/arch/arm/plat-s3c/include/plat/pm.h
index 3779775..5f8707e 100644
--- a/arch/arm/plat-s3c/include/plat/pm.h
+++ b/arch/arm/plat-s3c/include/plat/pm.h
@@ -44,6 +44,8 @@
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 @@
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 de4c4aa..9957b53 100644
--- a/arch/arm/plat-s3c/pm.c
+++ b/arch/arm/plat-s3c/pm.c
@@ -70,6 +70,8 @@
/* 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 @@
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 @@
__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)