diff options
| -rw-r--r-- | drivers/watchdog/ulp_wdog.c | 52 |
1 files changed, 36 insertions, 16 deletions
diff --git a/drivers/watchdog/ulp_wdog.c b/drivers/watchdog/ulp_wdog.c index ecd35ef22a..820da0f9dd 100644 --- a/drivers/watchdog/ulp_wdog.c +++ b/drivers/watchdog/ulp_wdog.c @@ -28,11 +28,15 @@ struct wdog_regs { #define UNLOCK_WORD0 0xC520 /* 1st unlock word */ #define UNLOCK_WORD1 0xD928 /* 2nd unlock word */ +#define UNLOCK_WORD 0xD928C520 /* unlock word */ +#define REFRESH_WORD 0xB480A602 /* refresh word */ + #define WDGCS_WDGE BIT(7) #define WDGCS_WDGUPDATE BIT(5) #define WDGCS_RCS BIT(10) #define WDGCS_ULK BIT(11) +#define WDGCS_CMD32EN BIT(13) #define WDGCS_FLG BIT(14) #define WDG_BUS_CLK (0x0) @@ -52,20 +56,30 @@ void hw_watchdog_reset(void) { struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR; - dmb(); - __raw_writel(REFRESH_WORD0, &wdog->cnt); - __raw_writel(REFRESH_WORD1, &wdog->cnt); - dmb(); + if (readl(&wdog->cs) & WDGCS_CMD32EN) { + writel(REFRESH_WORD, &wdog->cnt); + } else { + dmb(); + __raw_writel(REFRESH_WORD0, &wdog->cnt); + __raw_writel(REFRESH_WORD1, &wdog->cnt); + dmb(); + } } void hw_watchdog_init(void) { struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR; - - dmb(); - __raw_writel(UNLOCK_WORD0, &wdog->cnt); - __raw_writel(UNLOCK_WORD1, &wdog->cnt); - dmb(); + u32 cmd32 = 0; + + if (readl(&wdog->cs) & WDGCS_CMD32EN) { + writel(UNLOCK_WORD, &wdog->cnt); + cmd32 = WDGCS_CMD32EN; + } else { + dmb(); + __raw_writel(UNLOCK_WORD0, &wdog->cnt); + __raw_writel(UNLOCK_WORD1, &wdog->cnt); + dmb(); + } /* Wait WDOG Unlock */ while (!(readl(&wdog->cs) & WDGCS_ULK)) @@ -75,7 +89,7 @@ void hw_watchdog_init(void) writel(0, &wdog->win); /* setting 1-kHz clock source, enable counter running, and clear interrupt */ - writel((WDGCS_WDGE | WDGCS_WDGUPDATE |(WDG_LPO_CLK << 8) | WDGCS_FLG), &wdog->cs); + writel((cmd32 | WDGCS_WDGE | WDGCS_WDGUPDATE | (WDG_LPO_CLK << 8) | WDGCS_FLG), &wdog->cs); /* Wait WDOG reconfiguration */ while (!(readl(&wdog->cs) & WDGCS_RCS)) @@ -87,11 +101,17 @@ void hw_watchdog_init(void) void reset_cpu(void) { struct wdog_regs *wdog = (struct wdog_regs *)WDOG_BASE_ADDR; - - dmb(); - __raw_writel(UNLOCK_WORD0, &wdog->cnt); - __raw_writel(UNLOCK_WORD1, &wdog->cnt); - dmb(); + u32 cmd32 = 0; + + if (readl(&wdog->cs) & WDGCS_CMD32EN) { + writel(UNLOCK_WORD, &wdog->cnt); + cmd32 = WDGCS_CMD32EN; + } else { + dmb(); + __raw_writel(UNLOCK_WORD0, &wdog->cnt); + __raw_writel(UNLOCK_WORD1, &wdog->cnt); + dmb(); + } /* Wait WDOG Unlock */ while (!(readl(&wdog->cs) & WDGCS_ULK)) @@ -101,7 +121,7 @@ void reset_cpu(void) writel(0, &wdog->win); /* enable counter running */ - writel((WDGCS_WDGE | (WDG_LPO_CLK << 8)), &wdog->cs); + writel((cmd32 | WDGCS_WDGE | (WDG_LPO_CLK << 8)), &wdog->cs); /* Wait WDOG reconfiguration */ while (!(readl(&wdog->cs) & WDGCS_RCS)) |