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watchdog: pnx4008: add support for soft reset 

Add support for explicit soft reset using the reboot mode.

The default reboot mode behavior is unchanged;
you can overwrite the default reboot type in the board specific file
"DT_MACHINE_START" definition using the "reboot_mode" parameter.

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>
This commit is contained in:
Sylvain Lemieux 2016-03-04 13:44:07 -05:00 committed by Wim Van Sebroeck
parent 4ed5443d91
commit 25b286c02d
1 changed files with 10 additions and 3 deletions
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13
drivers/watchdog/pnx4008_wdt.c
View File

@ -129,9 +129,16 @@ static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd,
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));
if (mode == REBOOT_SOFT) {
/* Force match output active */
writel(EXT_MATCH0, WDTIM_EMR(wdt_base));
/* Internal reset on match output (RESOUT_N not asserted) */
writel(M_RES1, WDTIM_MCTRL(wdt_base));
} else {
/* 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);