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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: Ben Dooks <ben-linux@fluff.org>
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2 changed files with 11 additions and 0 deletions
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@ -44,6 +44,8 @@ extern void (*pm_cpu_sleep)(void);
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extern unsigned long s3c_pm_flags;
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extern unsigned char pm_uart_udivslot; /* true to save UART UDIVSLOT */
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/* from sleep.S */
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extern int s3c_cpu_save(unsigned long *saveblk);
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@ -88,6 +90,7 @@ struct pm_uart_save {
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u32 ufcon;
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u32 umcon;
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u32 ubrdiv;
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u32 udivslot;
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};
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/* helper functions to save/restore lists of registers. */
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@ -70,6 +70,8 @@ static inline void s3c_pm_debug_init(void)
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/* Save the UART configurations if we are configured for debug. */
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unsigned char pm_uart_udivslot;
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#ifdef CONFIG_S3C2410_PM_DEBUG
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struct pm_uart_save uart_save[CONFIG_SERIAL_SAMSUNG_UARTS];
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@ -84,6 +86,9 @@ static void s3c_pm_save_uart(unsigned int uart, struct pm_uart_save *save)
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save->umcon = __raw_readl(regs + S3C2410_UMCON);
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save->ubrdiv = __raw_readl(regs + S3C2410_UBRDIV);
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if (pm_uart_udivslot)
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save->udivslot = __raw_readl(regs + S3C2443_DIVSLOT);
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S3C_PMDBG("UART[%d]: ULCON=%04x, UCON=%04x, UFCON=%04x, UBRDIV=%04x\n",
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uart, save->ulcon, save->ucon, save->ufcon, save->ubrdiv);
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}
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@ -108,6 +113,9 @@ static void s3c_pm_restore_uart(unsigned int uart, struct pm_uart_save *save)
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__raw_writel(save->ufcon, regs + S3C2410_UFCON);
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__raw_writel(save->umcon, regs + S3C2410_UMCON);
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__raw_writel(save->ubrdiv, regs + S3C2410_UBRDIV);
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if (pm_uart_udivslot)
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__raw_writel(save->udivslot, regs + S3C2443_DIVSLOT);
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}
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static void s3c_pm_restore_uarts(void)
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