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>
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@ -367,6 +367,9 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
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val |= BIT_WDG_RUN | BIT_WDG_RST;
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sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_CTRL, val);
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/* Lock the watchdog */
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sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, ~WDG_UNLOCK_KEY);
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mdelay(1000);
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dev_emerg(sadi->dev, "Unable to restart system\n");
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