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| author | Sylvain Lemieux <slemieux@tycoint.com> | 2016-03-04 13:44:08 -0500 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2016-03-16 21:09:42 +0100 |
| commit | 247dcad5c0361fdae06903f3b10855ba0381802d (patch) | |
| tree | c31eeebc908d6777bc709522d996a54a59bdbad2 /drivers/watchdog/pnx4008_wdt.c | |
| parent | 25b286c02defa26b136818b17909789102225aa8 (diff) | |
| download | lwn-247dcad5c0361fdae06903f3b10855ba0381802d.tar.gz lwn-247dcad5c0361fdae06903f3b10855ba0381802d.zip | |
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: 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 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c index 51be66e8a473..0529aed158a4 100644 --- a/drivers/watchdog/pnx4008_wdt.c +++ b/drivers/watchdog/pnx4008_wdt.c @@ -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)); |