Commit 247dcad5 authored by Sylvain Lemieux's avatar Sylvain Lemieux Committed by Wim Van Sebroeck

watchdog: pnx4008: restart: support "cmd" from userspace

Added support to verify if a "cmd" is passed from the userspace program rebooting the system;
- if a valid "cmd" is available, handle it;
- If the received "cmd" is not supported, use the default reboot mode.
Signed-off-by: default avatarSylvain Lemieux <slemieux@tycoint.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 25b286c0
......@@ -129,6 +129,21 @@ static int pnx4008_wdt_set_timeout(struct watchdog_device *wdd,
static int pnx4008_restart_handler(struct watchdog_device *wdd,
unsigned long mode, void *cmd)
{
const char *boot_cmd = cmd;
/*
* Verify if a "cmd" passed from the userspace program rebooting
* the system; if available, handle it.
* - For details, see the 'reboot' syscall in kernel/reboot.c
* - If the received "cmd" is not supported, use the default mode.
*/
if (boot_cmd) {
if (boot_cmd[0] == 'h')
mode = REBOOT_HARD;
else if (boot_cmd[0] == 's')
mode = REBOOT_SOFT;
}
if (mode == REBOOT_SOFT) {
/* Force match output active */
writel(EXT_MATCH0, WDTIM_EMR(wdt_base));
......
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