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| author | Lucas Stach <dev@lynxeye.de> | 2014-10-20 20:15:30 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-11-04 12:16:40 +0100 |
| commit | 1834169f13cccb1784172aa1ccb85d89f006c254 (patch) | |
| tree | 565fef85697814e91039e6d36dfd44b40de517bd /arch/arm/mach-tegra | |
| parent | f63a42a9991164fd938ec2f37f0ed1d1caf9ef32 (diff) | |
| download | barebox-1834169f13cccb1784172aa1ccb85d89f006c254.tar.gz barebox-1834169f13cccb1784172aa1ccb85d89f006c254.tar.xz | |
tegra: pmc: add support for reset src detection
Also activate in defconfig.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/include/mach/tegra20-pmc.h | 9 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/tegra20-pmc.c | 32 |
2 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/include/mach/tegra20-pmc.h b/arch/arm/mach-tegra/include/mach/tegra20-pmc.h index 30ac06508c..c379544755 100644 --- a/arch/arm/mach-tegra/include/mach/tegra20-pmc.h +++ b/arch/arm/mach-tegra/include/mach/tegra20-pmc.h @@ -71,3 +71,12 @@ #define PMC_PARTID_C0NC 15 #define PMC_SCRATCH(i) (0x050 + 0x4*i) + +#define PMC_RST_STATUS 0x1b4 +#define PMC_RST_STATUS_RST_SRC_SHIFT 0 +#define PMC_RST_STATUS_RST_SRC_MASK (0x7 << PMC_RST_STATUS_RST_SRC_SHIFT) +#define PMC_RST_STATUS_RST_SRC_POR 0 +#define PMC_RST_STATUS_RST_SRC_WATCHDOG 1 +#define PMC_RST_STATUS_RST_SRC_SENSOR 2 +#define PMC_RST_STATUS_RST_SRC_SW_MAIN 3 +#define PMC_RST_STATUS_RST_SRC_LP0 4 diff --git a/arch/arm/mach-tegra/tegra20-pmc.c b/arch/arm/mach-tegra/tegra20-pmc.c index dcd2978109..eaa5ac73ff 100644 --- a/arch/arm/mach-tegra/tegra20-pmc.c +++ b/arch/arm/mach-tegra/tegra20-pmc.c @@ -28,6 +28,8 @@ #include <linux/reset.h> #include <mach/lowlevel.h> #include <mach/tegra-powergate.h> +#include <reset_source.h> + #include <mach/tegra20-pmc.h> static void __iomem *pmc_base; @@ -171,6 +173,33 @@ static int tegra_powergate_init(void) return 0; } +static void tegra20_pmc_detect_reset_cause(void) +{ + u32 reg = readl(pmc_base + PMC_RST_STATUS); + + switch ((reg & PMC_RST_STATUS_RST_SRC_MASK) >> + PMC_RST_STATUS_RST_SRC_SHIFT) { + case PMC_RST_STATUS_RST_SRC_POR: + reset_source_set(RESET_POR); + break; + case PMC_RST_STATUS_RST_SRC_WATCHDOG: + reset_source_set(RESET_WDG); + break; + case PMC_RST_STATUS_RST_SRC_LP0: + reset_source_set(RESET_WKE); + break; + case PMC_RST_STATUS_RST_SRC_SW_MAIN: + reset_source_set(RESET_RST); + break; + case PMC_RST_STATUS_RST_SRC_SENSOR: + reset_source_set(RESET_THERM); + break; + default: + reset_source_set(RESET_UKWN); + break; + } +} + static int tegra20_pmc_probe(struct device_d *dev) { pmc_base = dev_request_mem_region(dev, 0); @@ -181,6 +210,9 @@ static int tegra20_pmc_probe(struct device_d *dev) tegra_powergate_init(); + if (IS_ENABLED(CONFIG_RESET_SOURCE)) + tegra20_pmc_detect_reset_cause(); + return 0; } |