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authorSylvain Lemieux <slemieux@tycoint.com>2016-03-04 13:44:06 -0500
committerWim Van Sebroeck <wim@iguana.be>2016-03-16 21:09:40 +0100
commit4ed5443d9175f4b6008ca18601672c812a1fe93b (patch)
treec6110ab6129aebd70abcd8c8e3374c3eb21b2ffc /drivers/watchdog/pnx4008_wdt.c
parent43eec2f50c65bd469989a4dab8c1b5e14d87db84 (diff)
downloadlwn-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.c17
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 */