From: Sylvain Lemieux <slemieux@xxxxxxxxxxx>
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@xxxxxxxxxxx>
---
Changes from v1 to v2:
- Rename patch title;
was "arm: lpc32xx: restart: support "cmd" from userspace"
- Add change to "pnx-4008" driver instead of "mach-lpc32xx".
drivers/watchdog/pnx4008_wdt.c | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/drivers/watchdog/pnx4008_wdt.c b/drivers/watchdog/pnx4008_wdt.c
index 2275fd4..5f34299 100644
--- a/drivers/watchdog/pnx4008_wdt.c
+++ b/drivers/watchdog/pnx4008_wdt.c
@@ -133,6 +133,19 @@ static void pnx4008_wdt_sys_reset(enum reboot_mode mode, const char *cmd)
/* Make sure WDT clocks are enabled */
writel(LPC32XX_CLKPWR_PWMCLK_WDOG_EN, LPC32XX_CLKPWR_TIMER_CLK_CTRL);
+ /*
+ * Verify if a "cmd" passed from the userspace program rebooting
+ * the system; if available, and handle it.
+ * - For details, see the 'reboot' syscall in kernel/reboot.c
+ * - If the received "cmd" is not supported, use the default mode.
+ */
+ if (cmd) {
+ if (cmd[0] == 'h')
+ mode = REBOOT_HARD;
+ else if (cmd[0] == 's')
+ mode = REBOOT_SOFT;
+ }
+
if (mode == REBOOT_SOFT) {
/* Force match output active */
writel(EXT_MATCH0, WDTIM_EMR(wdt_base));
--
1.8.3.1
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