diff options
| author | Wadim Egorov <w.egorov@phytec.de> | 2025-05-15 13:15:54 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2025-05-29 08:32:28 -0600 |
| commit | be93c0892d0f0bf83ac669678e01ae27f798738e (patch) | |
| tree | eb70b5983ccf0aa913d1bdac35d625d4686104b0 /arch/arm/mach-k3/am62x/boot.c | |
| parent | a282950debce20035cc12672c856ff2d70326ad4 (diff) | |
arm: mach-k3: am62x: Implement get_reset_reason()
Implement get_reset_reason() for AM62x to enable reporting of
the reset cause in the cpuinfo output.
Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Diffstat (limited to 'arch/arm/mach-k3/am62x/boot.c')
| -rw-r--r-- | arch/arm/mach-k3/am62x/boot.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/arch/arm/mach-k3/am62x/boot.c b/arch/arm/mach-k3/am62x/boot.c index 132b42f7edb..a3a6cda6bdb 100644 --- a/arch/arm/mach-k3/am62x/boot.c +++ b/arch/arm/mach-k3/am62x/boot.c @@ -101,3 +101,43 @@ u32 get_boot_device(void) return bootmedia; } + +const char *get_reset_reason(void) +{ + u32 reset_reason = readl(CTRLMMR_MCU_RST_SRC); + + /* After reading reset source register, software must clear it */ + if (reset_reason) + writel(reset_reason, CTRLMMR_MCU_RST_SRC); + + if (reset_reason == 0 || + (reset_reason & (RST_SRC_SW_MAIN_POR_FROM_MAIN | + RST_SRC_SW_MAIN_POR_FROM_MCU | + RST_SRC_DS_MAIN_PORZ))) + return "POR"; + + if (reset_reason & (RST_SRC_SAFETY_ERR | RST_SRC_MAIN_ESM_ERR)) + return "ESM"; + + if (reset_reason & RST_SRC_DM_WDT_RST) + return "WDOG"; + + if (reset_reason & (RST_SRC_SW_MAIN_WARM_FROM_MAIN | + RST_SRC_SW_MAIN_WARM_FROM_MCU | + RST_SRC_SW_MCU_WARM_RST)) + return "RST"; + + if (reset_reason & (RST_SRC_SMS_WARM_RST | RST_SRC_SMS_COLD_RST)) + return "DMSC"; + + if (reset_reason & RST_SRC_DEBUG_RST) + return "JTAG"; + + if (reset_reason & RST_SRC_THERMAL_RST) + return "THERMAL"; + + if (reset_reason & (RST_SRC_MAIN_RESET_PIN | RST_SRC_MCU_RESET_PIN)) + return "PIN"; + + return "UNKNOWN"; +} |