watchdog: apple: Increase reset delay to 150ms

The Apple A8X SoC seems to be slowest at resetting, taking up to around
125ms to reset. Wait 150ms to be safe here.

Signed-off-by: Nick Chan <[email protected]>
Reviewed-by: Sven Peter <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Guenter Roeck <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>

Author: asdfugil

drivers/watchdog/apple_wdt.c

@@ -127,11 +127,11 @@ static int apple_wdt_restart(struct watchdog_device *wdd, unsigned long mode,
 	/*
 	 * Flush writes and then wait for the SoC to reset. Even though the
 	 * reset is queued almost immediately experiments have shown that it
-	 * can take up to ~20-25ms until the SoC is actually reset. Just wait
-	 * 50ms here to be safe.
+	 * can take up to ~120-125ms until the SoC is actually reset. Just
+	 * wait 150ms here to be safe.
 	 */
 	(void)readl(wdt->regs + APPLE_WDT_WD1_CUR_TIME);
-	mdelay(50);
+	mdelay(150);
 
 	return 0;
 }