diff options
| author | Ye Li <ye.li@nxp.com> | 2022-10-21 16:41:15 +0800 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2022-10-24 11:10:21 +0200 |
| commit | a79f2007d018124c241a975bf522346d60e794a2 (patch) | |
| tree | d142914b5f66f02e69d2455602c5a356d9b7a291 /drivers/watchdog/ulp_wdog.c | |
| parent | ddc8d36a745517fec57787ec9b17ab44c7ad973c (diff) | |
ulp_wdog: Update ulp wdog driver for 32bits command
To use 32bits refresh and unlock command as default, check the CMD32EN
bit to select the corresponding commands.
Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers/watchdog/ulp_wdog.c')
| -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)) |