From bedbef8ad3e75a304af6361af235302bcc61d06b Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Tue, 14 May 2024 06:39:01 +0000
Subject: [PATCH] 修改内核路径
---
kernel/drivers/watchdog/da9063_wdt.c | 39 +++++++++++++++++++++++++--------------
1 files changed, 25 insertions(+), 14 deletions(-)
diff --git a/kernel/drivers/watchdog/da9063_wdt.c b/kernel/drivers/watchdog/da9063_wdt.c
index 384dca1..4235842 100644
--- a/kernel/drivers/watchdog/da9063_wdt.c
+++ b/kernel/drivers/watchdog/da9063_wdt.c
@@ -46,15 +46,16 @@
}
/*
- * Return 0 if watchdog is disabled, else non zero.
+ * Read the currently active timeout.
+ * Zero means the watchdog is disabled.
*/
-static unsigned int da9063_wdt_is_running(struct da9063 *da9063)
+static unsigned int da9063_wdt_read_timeout(struct da9063 *da9063)
{
unsigned int val;
regmap_read(da9063->regmap, DA9063_REG_CONTROL_D, &val);
- return val & DA9063_TWDSCALE_MASK;
+ return wdt_timeout[val & DA9063_TWDSCALE_MASK];
}
static int da9063_wdt_disable_timer(struct da9063 *da9063)
@@ -188,17 +189,19 @@
static int da9063_wdt_probe(struct platform_device *pdev)
{
+ struct device *dev = &pdev->dev;
struct da9063 *da9063;
struct watchdog_device *wdd;
+ unsigned int timeout;
- if (!pdev->dev.parent)
+ if (!dev->parent)
return -EINVAL;
- da9063 = dev_get_drvdata(pdev->dev.parent);
+ da9063 = dev_get_drvdata(dev->parent);
if (!da9063)
return -EINVAL;
- wdd = devm_kzalloc(&pdev->dev, sizeof(*wdd), GFP_KERNEL);
+ wdd = devm_kzalloc(dev, sizeof(*wdd), GFP_KERNEL);
if (!wdd)
return -ENOMEM;
@@ -207,22 +210,30 @@
wdd->min_timeout = DA9063_WDT_MIN_TIMEOUT;
wdd->max_timeout = DA9063_WDT_MAX_TIMEOUT;
wdd->min_hw_heartbeat_ms = DA9063_RESET_PROTECTION_MS;
- wdd->timeout = DA9063_WDG_TIMEOUT;
- wdd->parent = &pdev->dev;
-
+ wdd->parent = dev;
wdd->status = WATCHDOG_NOWAYOUT_INIT_STATUS;
watchdog_set_restart_priority(wdd, 128);
-
watchdog_set_drvdata(wdd, da9063);
- /* Change the timeout to the default value if the watchdog is running */
- if (da9063_wdt_is_running(da9063)) {
- da9063_wdt_update_timeout(da9063, DA9063_WDG_TIMEOUT);
+ wdd->timeout = DA9063_WDG_TIMEOUT;
+
+ /* Use pre-configured timeout if watchdog is already running. */
+ timeout = da9063_wdt_read_timeout(da9063);
+ if (timeout)
+ wdd->timeout = timeout;
+
+ /* Set timeout, maybe override it with DT value, scale it */
+ watchdog_init_timeout(wdd, 0, dev);
+ da9063_wdt_set_timeout(wdd, wdd->timeout);
+
+ /* Update timeout if the watchdog is already running. */
+ if (timeout) {
+ da9063_wdt_update_timeout(da9063, wdd->timeout);
set_bit(WDOG_HW_RUNNING, &wdd->status);
}
- return devm_watchdog_register_device(&pdev->dev, wdd);
+ return devm_watchdog_register_device(dev, wdd);
}
static struct platform_driver da9063_wdt_driver = {
--
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