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| author | Peng Fan <peng.fan@nxp.com> | 2021-08-07 11:00:49 +0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2021-08-09 15:46:51 +0300 |
| commit | 3a01f723ab028a09b2c750de43b0ccb024ff0b4f (patch) | |
| tree | c46ef320a7ec9408e801f36243b31ba1e4e8ef73 /arch/arm/mach-imx | |
| parent | 610083e547d19e87b567849b299187d66b643fb9 (diff) | |
| download | u-boot-3a01f723ab028a09b2c750de43b0ccb024ff0b4f.tar.xz | |
arm: imx8ulp: disable wdog3
Disable wdog3 which is configured by ROM
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/imx8ulp/soc.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/imx8ulp/soc.c b/arch/arm/mach-imx/imx8ulp/soc.c index 33aec228e3..051dec1a5a 100644 --- a/arch/arm/mach-imx/imx8ulp/soc.c +++ b/arch/arm/mach-imx/imx8ulp/soc.c @@ -144,9 +144,43 @@ int print_cpuinfo(void) } #endif +#define UNLOCK_WORD0 0xC520 /* 1st unlock word */ +#define UNLOCK_WORD1 0xD928 /* 2nd unlock word */ +#define REFRESH_WORD0 0xA602 /* 1st refresh word */ +#define REFRESH_WORD1 0xB480 /* 2nd refresh word */ + +static void disable_wdog(void __iomem *wdog_base) +{ + u32 val_cs = readl(wdog_base + 0x00); + + if (!(val_cs & 0x80)) + return; + + dmb(); + __raw_writel(REFRESH_WORD0, (wdog_base + 0x04)); /* Refresh the CNT */ + __raw_writel(REFRESH_WORD1, (wdog_base + 0x04)); + dmb(); + + if (!(val_cs & 800)) { + dmb(); + __raw_writel(UNLOCK_WORD0, (wdog_base + 0x04)); + __raw_writel(UNLOCK_WORD1, (wdog_base + 0x04)); + dmb(); + + while (!(readl(wdog_base + 0x00) & 0x800)) + ; + } + writel(0x0, (wdog_base + 0x0C)); /* Set WIN to 0 */ + writel(0x400, (wdog_base + 0x08)); /* Set timeout to default 0x400 */ + writel(0x120, (wdog_base + 0x00)); /* Disable it and set update */ + + while (!(readl(wdog_base + 0x00) & 0x400)) + ; +} + void init_wdog(void) { - /* TODO */ + disable_wdog((void __iomem *)WDG3_RBASE); } static struct mm_region imx8ulp_arm64_mem_map[] = { |