The patch titled
Subject: watchdog: s3c2410: add restart handler
has been removed from the -mm tree. Its filename was
watchdog-s3c2410-add-restart-handler.patch
This patch was dropped because it is obsolete
------------------------------------------------------
From: Heiko Stübner <heiko@xxxxxxxxx>
Subject: watchdog: s3c2410: add restart handler
On a lot of Samsung systems the watchdog is responsible for restarting the
system and until now this code was contained in plat-samsung/watchdog-reset.c.
With the introduction of the restart handlers, this code can now move into
driver itself, removing the need for arch-specific code.
Tested on a S3C2442 based GTA02
Signed-off-by: Heiko Stuebner <heiko@xxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jonas Jensen <jonas.jensen@xxxxxxxxx>
Cc: Maxime Ripard <maxime.ripard@xxxxxxxxxxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Tomasz Figa <t.figa@xxxxxxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: Wim Van Sebroeck <wim@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/watchdog/s3c2410_wdt.c | 36 +++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff -puN drivers/watchdog/s3c2410_wdt.c~watchdog-s3c2410-add-restart-handler drivers/watchdog/s3c2410_wdt.c
--- a/drivers/watchdog/s3c2410_wdt.c~watchdog-s3c2410-add-restart-handler
+++ a/drivers/watchdog/s3c2410_wdt.c
@@ -41,6 +41,8 @@
#include <linux/of.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
+#include <linux/reboot.h>
+#include <linux/delay.h>
#define S3C2410_WTCON 0x00
#define S3C2410_WTDAT 0x04
@@ -128,6 +130,7 @@ struct s3c2410_wdt {
unsigned long wtdat_save;
struct watchdog_device wdt_device;
struct notifier_block freq_transition;
+ struct notifier_block restart_handler;
struct s3c2410_wdt_variant *drv_data;
struct regmap *pmureg;
};
@@ -449,6 +452,31 @@ static inline void s3c2410wdt_cpufreq_de
}
#endif
+static int s3c2410wdt_restart(struct notifier_block *this,
+ unsigned long mode, void *cmd)
+{
+ struct s3c2410_wdt *wdt = container_of(this, struct s3c2410_wdt,
+ restart_handler);
+ void __iomem *wdt_base = wdt->reg_base;
+
+ /* disable watchdog, to be safe */
+ writel(0, wdt_base + S3C2410_WTCON);
+
+ /* put initial values into count and data */
+ writel(0x80, wdt_base + S3C2410_WTCNT);
+ writel(0x80, wdt_base + S3C2410_WTDAT);
+
+ /* set the watchdog to go and reset... */
+ writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV16 |
+ S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x20),
+ wdt_base + S3C2410_WTCON);
+
+ /* wait for reset to assert... */
+ mdelay(500);
+
+ return NOTIFY_DONE;
+}
+
static inline unsigned int s3c2410wdt_get_bootstatus(struct s3c2410_wdt *wdt)
{
unsigned int rst_stat;
@@ -603,6 +631,12 @@ static int s3c2410wdt_probe(struct platf
platform_set_drvdata(pdev, wdt);
+ wdt->restart_handler.notifier_call = s3c2410wdt_restart;
+ wdt->restart_handler.priority = 128;
+ ret = register_restart_handler(&wdt->restart_handler);
+ if (ret)
+ pr_err("cannot register restart handler, %d\n", ret);
+
/* print out a statement of readiness */
wtcon = readl(wdt->reg_base + S3C2410_WTCON);
@@ -632,6 +666,8 @@ static int s3c2410wdt_remove(struct plat
int ret;
struct s3c2410_wdt *wdt = platform_get_drvdata(dev);
+ unregister_restart_handler(&wdt->restart_handler);
+
ret = s3c2410wdt_mask_and_disable_reset(wdt, true);
if (ret < 0)
return ret;
_
Patches currently in -mm which might be from heiko@xxxxxxxxx are
rtc-rk808-add-rtc-driver-for-rk808.patch
rtc-rk808-add-rtc-driver-for-rk808-fix-2.patch
clk-rk808-add-clkout-driver-for-rk808.patch
linux-next.patch
clk-samsung-register-restart-handlers-for-s3c2412-and-s3c2443.patch
clk-rockchip-add-restart-handler.patch
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