Commit 3e3378f6 authored Oct 28, 2019 by Lingling Xu Committed by Greg Kroah-Hartman Dec 31, 2019

spi: sprd: adi: Add missing lock protection when rebooting



[ Upstream commit 91ea1d70607e374b014b4b9bea771ce661f9f64b ]

When rebooting the system, we should lock the watchdog after
configuration to make sure the watchdog can reboot the system
successfully.

Signed-off-by: Lingling Xu <ling_ling.xu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Link: https://lore.kernel.org/r/7b04711127434555e3a1a86bc6be99860cd86668.1572257085.git.baolin.wang@linaro.org


Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent 16015bd9

drivers/spi/spi-sprd-adi.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -367,6 +367,9 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
		val \|= BIT_WDG_RUN \| BIT_WDG_RST;
		sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_CTRL, val);

		/* Lock the watchdog */
		sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, ~WDG_UNLOCK_KEY);

		mdelay(1000);

		dev_emerg(sadi->dev, "Unable to restart system\n");