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[ARM] S3C: Add debug to UART save and a per-arch callback pre-restore

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Add a simple debug message on saving the UART state and add a per-arch
pre-restore function to be used by the s3c64xx restore code to ensure
the UARTs control registers do not go through any illegal state changes.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2008-12-12 00:24:23 +00:00
parent 67b3e542ab
commit 57699e9adf
2 changed files with 10 additions and 0 deletions
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5
arch/arm/plat-s3c/pm.c
View File

@ -83,6 +83,9 @@ static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
save->ufcon = __raw_readl(regs + S3C2410_UFCON);
save->umcon = __raw_readl(regs + S3C2410_UMCON);
save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
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)
@ -98,6 +101,8 @@ 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);

5
arch/arm/plat-s3c24xx/include/plat/pm-core.h
View File

@ -57,3 +57,8 @@ static inline void s3c_pm_arch_show_resume_irqs(void)
s3c_pm_show_resume_irqs(IRQ_EINT4-4, __raw_readl(S3C2410_EINTPEND),
s3c_irqwake_eintmask);
}
static inline void s3c_pm_arch_update_uart(void __iomem *regs,
struct pm_uart_save *save)
{
}