diff options
| author | Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com> | 2026-07-28 16:28:02 +0530 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-08-10 09:00:04 -0700 |
| commit | 0595f74ea1d3092284ec5bcb8eeea09face23de9 (patch) | |
| tree | 7f11ff322394562c0ef995e7a21093ec550577df | |
| parent | 7aa968415cd2fd7d5a345f5c6a9547c9d6b102b8 (diff) | |
watchdog: qcom: report WDIOF_POWERUNDER in bootstatus
On IPQ platforms, identify the restart reason as POWERUNDER, similar to
CARDRESET, and expose it via the bootstatus sysfs interface.
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Kathiravan Thirumoorthy <kathiravan.thirumoorthy@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260728-qcom_wdt_powerunder-v1-1-de8d9e964e7d@oss.qualcomm.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
| -rw-r--r-- | drivers/watchdog/qcom-wdt.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/watchdog/qcom-wdt.c b/drivers/watchdog/qcom-wdt.c index 49bd04841f0c..8e1fa1347343 100644 --- a/drivers/watchdog/qcom-wdt.c +++ b/drivers/watchdog/qcom-wdt.c @@ -44,6 +44,7 @@ struct qcom_wdt_match_data { bool pretimeout; u32 max_tick_count; u32 wdt_reason_val; + u32 powerunder_reason_val; }; struct qcom_wdt { @@ -164,7 +165,8 @@ static const struct watchdog_info qcom_wdt_info = { .options = WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT - | WDIOF_CARDRESET, + | WDIOF_CARDRESET + | WDIOF_POWERUNDER, .identity = KBUILD_MODNAME, }; @@ -173,7 +175,8 @@ static const struct watchdog_info qcom_wdt_pt_info = { | WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT | WDIOF_PRETIMEOUT - | WDIOF_CARDRESET, + | WDIOF_CARDRESET + | WDIOF_POWERUNDER, .identity = KBUILD_MODNAME, }; @@ -188,6 +191,7 @@ static const struct qcom_wdt_match_data match_data_ipq5424 = { .pretimeout = true, .max_tick_count = 0xFFFFFU, .wdt_reason_val = 5, + .powerunder_reason_val = 1, }; static const struct qcom_wdt_match_data match_data_kpss = { @@ -197,12 +201,13 @@ static const struct qcom_wdt_match_data match_data_kpss = { }; static int qcom_wdt_get_bootstatus(struct device *dev, struct qcom_wdt *wdt, - u32 val) + const struct qcom_wdt_match_data *data) { struct device_node *imem; struct resource res; void __iomem *addr; int ret; + int val; imem = of_parse_phandle(dev->of_node, "sram", 0); if (!imem) { @@ -222,8 +227,11 @@ static int qcom_wdt_get_bootstatus(struct device *dev, struct qcom_wdt *wdt, if (!addr) return -ENOMEM; - if (readl(addr) == val) + val = readl(addr); + if (val == data->wdt_reason_val) wdt->wdd.bootstatus = WDIOF_CARDRESET; + else if (val == data->powerunder_reason_val) + wdt->wdd.bootstatus = WDIOF_POWERUNDER; iounmap(addr); @@ -310,7 +318,7 @@ static int qcom_wdt_probe(struct platform_device *pdev) wdt->wdd.parent = dev; wdt->layout = data->offset; - ret = qcom_wdt_get_bootstatus(dev, wdt, data->wdt_reason_val); + ret = qcom_wdt_get_bootstatus(dev, wdt, data); if (ret) dev_err(dev, "failed to get the bootstatus, %d\n", ret); |