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authorKeguang Zhang <keguang.zhang@gmail.com>2023-03-30 19:20:51 +0800
committerWim Van Sebroeck <wim@linux-watchdog.org>2023-04-22 16:05:38 +0200
commit2a31bf20808aa3642a942ab9ce421ebb7585eb3a (patch)
tree9082040139d8045cd8d057e4ab415aff2b48032c /drivers/watchdog
parentd0ee0e8aa97e6e1d443eaab8c94d580d0a6f5a89 (diff)
watchdog: loongson1_wdt: Implement restart handler
Implement restart handler for the Loongson-1 watchdog driver and define the watchdog registers instead of including the legacy header. Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20230330112051.551648-3-keguang.zhang@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/loongson1_wdt.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/drivers/watchdog/loongson1_wdt.c b/drivers/watchdog/loongson1_wdt.c
index c55656cfb403..3c651c50a98c 100644
--- a/drivers/watchdog/loongson1_wdt.c
+++ b/drivers/watchdog/loongson1_wdt.c
@@ -7,7 +7,11 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/watchdog.h>
-#include <loongson1.h>
+
+/* Loongson 1 Watchdog Register Definitions */
+#define WDT_EN 0x0
+#define WDT_TIMER 0x4
+#define WDT_SET 0x8
#define DEFAULT_HEARTBEAT 30
@@ -66,6 +70,18 @@ static int ls1x_wdt_stop(struct watchdog_device *wdt_dev)
return 0;
}
+static int ls1x_wdt_restart(struct watchdog_device *wdt_dev,
+ unsigned long action, void *data)
+{
+ struct ls1x_wdt_drvdata *drvdata = watchdog_get_drvdata(wdt_dev);
+
+ writel(0x1, drvdata->base + WDT_EN);
+ writel(0x1, drvdata->base + WDT_TIMER);
+ writel(0x1, drvdata->base + WDT_SET);
+
+ return 0;
+}
+
static const struct watchdog_info ls1x_wdt_info = {
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE,
.identity = "Loongson1 Watchdog",
@@ -77,6 +93,7 @@ static const struct watchdog_ops ls1x_wdt_ops = {
.stop = ls1x_wdt_stop,
.ping = ls1x_wdt_ping,
.set_timeout = ls1x_wdt_set_timeout,
+ .restart = ls1x_wdt_restart,
};
static int ls1x_wdt_probe(struct platform_device *pdev)