diff options
| author | Alice Guo <alice.guo@nxp.com> | 2022-10-21 16:41:16 +0800 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2022-10-24 11:10:21 +0200 |
| commit | ef0ad9b07da1595b33fa19ff96a11038c8753755 (patch) | |
| tree | ea4b09a6f11d330336bdfdb00bf577c76e7856de /drivers | |
| parent | a79f2007d018124c241a975bf522346d60e794a2 (diff) | |
watchdog: ulp_wdog: Update watchdog driver for imx93
The WDOG clocks are sourced from the fixed 32KHz (lpo_clk).When the
timeout period exceeds 2 seconds, the value written to the TOVAL
register is larger than 16-bit can represent. Enabling watchdog
prescaler to solve this problem.
Signed-off-by: Alice Guo <alice.guo@nxp.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/watchdog/ulp_wdog.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/watchdog/ulp_wdog.c b/drivers/watchdog/ulp_wdog.c index 820da0f9dd..17778587ee 100644 --- a/drivers/watchdog/ulp_wdog.c +++ b/drivers/watchdog/ulp_wdog.c @@ -36,6 +36,7 @@ struct wdog_regs { #define WDGCS_RCS BIT(10) #define WDGCS_ULK BIT(11) +#define WDOG_CS_PRES BIT(12) #define WDGCS_CMD32EN BIT(13) #define WDGCS_FLG BIT(14) @@ -89,7 +90,12 @@ void hw_watchdog_init(void) writel(0, &wdog->win); /* setting 1-kHz clock source, enable counter running, and clear interrupt */ - writel((cmd32 | WDGCS_WDGE | WDGCS_WDGUPDATE | (WDG_LPO_CLK << 8) | WDGCS_FLG), &wdog->cs); + if (IS_ENABLED(CONFIG_ARCH_IMX9)) + writel((cmd32 | WDGCS_WDGE | WDGCS_WDGUPDATE | (WDG_LPO_CLK << 8) | + WDGCS_FLG | WDOG_CS_PRES), &wdog->cs); + else + writel((cmd32 | WDGCS_WDGE | WDGCS_WDGUPDATE | (WDG_LPO_CLK << 8) | + WDGCS_FLG), &wdog->cs); /* Wait WDOG reconfiguration */ while (!(readl(&wdog->cs) & WDGCS_RCS)) @@ -117,11 +123,14 @@ void reset_cpu(void) while (!(readl(&wdog->cs) & WDGCS_ULK)) ; - hw_watchdog_set_timeout(5); /* 5ms timeout */ + hw_watchdog_set_timeout(5); /* 5ms timeout for general; 40ms timeout for imx93 */ writel(0, &wdog->win); /* enable counter running */ - writel((cmd32 | WDGCS_WDGE | (WDG_LPO_CLK << 8)), &wdog->cs); + if (IS_ENABLED(CONFIG_ARCH_IMX9)) + writel((cmd32 | WDGCS_WDGE | (WDG_LPO_CLK << 8) | WDOG_CS_PRES), &wdog->cs); + else + writel((cmd32 | WDGCS_WDGE | (WDG_LPO_CLK << 8)), &wdog->cs); /* Wait WDOG reconfiguration */ while (!(readl(&wdog->cs) & WDGCS_RCS)) |