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watchdog: loongson1_wdt: Implement restart handler

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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>
This commit is contained in:
Keguang Zhang 2023-03-30 19:20:51 +08:00 committed by Wim Van Sebroeck
parent d0ee0e8aa9
commit 2a31bf2080
1 changed files with 18 additions and 1 deletions
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19
drivers/watchdog/loongson1_wdt.c
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@ -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)