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| author | Sylvain Lemieux <slemieux@tycoint.com> | 2016-03-04 13:44:06 -0500 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2016-03-16 21:09:40 +0100 |
| commit | 4ed5443d9175f4b6008ca18601672c812a1fe93b (patch) | |
| tree | c6110ab6129aebd70abcd8c8e3374c3eb21b2ffc /drivers/watchdog/pnx4008_wdt.c | |
| parent | 43eec2f50c65bd469989a4dab8c1b5e14d87db84 (diff) | |
| download | lwn-4ed5443d9175f4b6008ca18601672c812a1fe93b.tar.gz lwn-4ed5443d9175f4b6008ca18601672c812a1fe93b.zip | |
watchdog: pnx4008: add restart handler
Add restart handler capability to the driver;
the restart handler implementation was taken from
"mach-lpc32xx" ("lpc23xx_restart" function).
Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/pnx4008_wdt.c')
| -rw-r--r-- | drivers/watchdog/pnx4008_wdt.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index 88264a21017b..f3be522986b6 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -31,6 +31,8 @@ #include <linux/slab.h> #include <linux/err.h> #include <linux/of.h> +#include <linux/delay.h> +#include <linux/reboot.h> #include <mach/hardware.h> /* WatchDog Timer - Chapter 23 Page 207 */ @@ -124,6 +126,19 @@ static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd, return 0; } +static int pnx4008_restart_handler(struct watchdog_device *wdd, + unsigned long mode, void *cmd) +{ + /* Instant assert of RESETOUT_N with pulse length 1mS */ + writel(13000, WDTIM_PULSE(wdt_base)); + writel(M_RES2 | RESFRC1 | RESFRC2, WDTIM_MCTRL(wdt_base)); + + /* Wait for watchdog to reset system */ + mdelay(1000); + + return NOTIFY_DONE; +} + static const struct watchdog_info pnx4008_wdt_ident = { .options = WDIOF_CARDRESET | WDIOF_MAGICCLOSE | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING, @@ -135,6 +150,7 @@ static const struct watchdog_ops pnx4008_wdt_ops = { .start = pnx4008_wdt_start, .stop = pnx4008_wdt_stop, .set_timeout = pnx4008_wdt_set_timeout, + .restart = pnx4008_restart_handler, }; static struct watchdog_device pnx4008_wdd = { @@ -169,6 +185,7 @@ static int pnx4008_wdt_probe(struct platform_device *pdev) WDIOF_CARDRESET : 0; pnx4008_wdd.parent = &pdev->dev; watchdog_set_nowayout(&pnx4008_wdd, nowayout); + watchdog_set_restart_priority(&pnx4008_wdd, 128); pnx4008_wdt_stop(&pnx4008_wdd); /* disable for now */ |