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| author | Jonas Jensen <jonas.jensen@gmail.com> | 2013-12-18 16:18:03 +0100 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2014-01-28 21:27:32 +0100 |
| commit | 8773926d7135bb2d4e933272cd4c0c3aa5c4a088 (patch) | |
| tree | f8a6581167ad86b31405216436968ec8e3408302 /drivers/watchdog/moxart_wdt.c | |
| parent | d5cfaf0a8554ad6b0e74955c7217ed24b2cadc9b (diff) | |
| download | talos-obmc-linux-8773926d7135bb2d4e933272cd4c0c3aa5c4a088.tar.gz talos-obmc-linux-8773926d7135bb2d4e933272cd4c0c3aa5c4a088.zip | |
watchdog: mach-moxart: add restart handler
mach-moxart lacks a separate register for reset; as a workaround,
add a function that can be hooked to arm_pm_restart.
Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/moxart_wdt.c')
| -rw-r--r-- | drivers/watchdog/moxart_wdt.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/watchdog/moxart_wdt.c b/drivers/watchdog/moxart_wdt.c index 4166e4d116a8..4aa3a8a876fe 100644 --- a/drivers/watchdog/moxart_wdt.c +++ b/drivers/watchdog/moxart_wdt.c @@ -19,6 +19,8 @@ #include <linux/watchdog.h> #include <linux/moduleparam.h> +#include <asm/system_misc.h> + #define REG_COUNT 0x4 #define REG_MODE 0x8 #define REG_ENABLE 0xC @@ -29,8 +31,17 @@ struct moxart_wdt_dev { unsigned int clock_frequency; }; +static struct moxart_wdt_dev *moxart_restart_ctx; + static int heartbeat; +static void moxart_wdt_restart(enum reboot_mode reboot_mode, const char *cmd) +{ + writel(1, moxart_restart_ctx->base + REG_COUNT); + writel(0x5ab9, moxart_restart_ctx->base + REG_MODE); + writel(0x03, moxart_restart_ctx->base + REG_ENABLE); +} + static int moxart_wdt_stop(struct watchdog_device *wdt_dev) { struct moxart_wdt_dev *moxart_wdt = watchdog_get_drvdata(wdt_dev); @@ -125,6 +136,9 @@ static int moxart_wdt_probe(struct platform_device *pdev) if (err) return err; + moxart_restart_ctx = moxart_wdt; + arm_pm_restart = moxart_wdt_restart; + dev_dbg(dev, "Watchdog enabled (heartbeat=%d sec, nowayout=%d)\n", moxart_wdt->dev.timeout, nowayout); @@ -135,6 +149,7 @@ static int moxart_wdt_remove(struct platform_device *pdev) { struct moxart_wdt_dev *moxart_wdt = platform_get_drvdata(pdev); + arm_pm_restart = NULL; moxart_wdt_stop(&moxart_wdt->dev); watchdog_unregister_device(&moxart_wdt->dev); |
