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| author | Andrey Smirnov <andrew.smirnov@gmail.com> | 2018-04-20 18:05:30 -0700 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-04-26 13:46:28 +0200 |
| commit | 3375252d35eb74ad3e867809aac06ec1ab4446fa (patch) | |
| tree | 67d32cdb3b8224ae9612ae3a4ff36308fc9de3c8 | |
| parent | 505b5e65298e7b25aa2fe3d8ee0799ca8712a629 (diff) | |
| download | barebox-3375252d35eb74ad3e867809aac06ec1ab4446fa.tar.gz barebox-3375252d35eb74ad3e867809aac06ec1ab4446fa.tar.xz | |
ARM: i.MX: Add infrastructure to record SoC reset reason
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | arch/arm/mach-imx/imx.c | 33 | ||||
| -rw-r--r-- | arch/arm/mach-imx/include/mach/reset-reason.h | 25 |
2 files changed, 58 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx.c b/arch/arm/mach-imx/imx.c index 9400105c66..29dad9a412 100644 --- a/arch/arm/mach-imx/imx.c +++ b/arch/arm/mach-imx/imx.c @@ -14,8 +14,10 @@ #include <common.h> #include <of.h> #include <init.h> +#include <io.h> #include <mach/revision.h> #include <mach/generic.h> +#include <mach/reset-reason.h> static int __imx_silicon_revision = IMX_CHIP_REV_UNKNOWN; @@ -147,3 +149,34 @@ static int imx_init(void) return ret; } postcore_initcall(imx_init); + +void imx_set_reset_reason(void __iomem *srsr, + const struct imx_reset_reason *reasons) +{ + enum reset_src_type type = RESET_UKWN; + const u32 reg = readl(srsr); + int i, instance = 0; + + /* + * SRSR register captures ALL reset event that occured since + * POR, so we need to clear it to make sure we only caputre + * the latest one. + */ + writel(reg, srsr); + + for (i = 0; reasons[i].mask; i++) { + if (reg & reasons[i].mask) { + type = reasons[i].type; + instance = reasons[i].instance; + break; + } + } + + /* + * Report this with above default priority in order to make + * sure we'll always override info from watchdog driver. + */ + reset_source_set_priority(type, + RESET_SOURCE_DEFAULT_PRIORITY + 1); + reset_source_set_instance(type, instance); +} diff --git a/arch/arm/mach-imx/include/mach/reset-reason.h b/arch/arm/mach-imx/include/mach/reset-reason.h new file mode 100644 index 0000000000..39afc4b287 --- /dev/null +++ b/arch/arm/mach-imx/include/mach/reset-reason.h @@ -0,0 +1,25 @@ +#ifndef __MACH_RESET_REASON_H__ +#define __MACH_RESET_REASON_H__ + +#include <reset_source.h> + +#define IMX_SRC_SRSR_IPP_RESET BIT(0) +#define IMX_SRC_SRSR_CSU_RESET BIT(1) +#define IMX_SRC_SRSR_IPP_USER_RESET BIT(3) +#define IMX_SRC_SRSR_WDOG1_RESET BIT(4) +#define IMX_SRC_SRSR_JTAG_RESET BIT(5) +#define IMX_SRC_SRSR_JTAG_SW_RESET BIT(6) +#define IMX_SRC_SRSR_WDOG3_RESET BIT(7) +#define IMX_SRC_SRSR_WDOG4_RESET BIT(8) +#define IMX_SRC_SRSR_TEMPSENSE_RESET BIT(9) +#define IMX_SRC_SRSR_WARM_BOOT BIT(16) + +struct imx_reset_reason { + uint32_t mask; + enum reset_src_type type; + int instance; +}; + +void imx_set_reset_reason(void __iomem *, const struct imx_reset_reason *); + +#endif /* __MACH_RESET_REASON_H__ */ |