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| author | Lingling Xu <ling_ling.xu@unisoc.com> | 2019-10-28 18:10:30 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 16:35:28 +0100 |
| commit | 3e3378f601d3b32f1ad4365114add5753499c1c4 (patch) | |
| tree | 874666316284ac89fb3dd9ecf55df860d98b907e /drivers/spi | |
| parent | 16015bd930d6f27313a151a6bff42549ff91c699 (diff) | |
| download | linux-rt-3e3378f601d3b32f1ad4365114add5753499c1c4.tar.gz | |
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>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-sprd-adi.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c index df5960bddfe6..f1fc2bde6ef3 100644 --- a/drivers/spi/spi-sprd-adi.c +++ b/drivers/spi/spi-sprd-adi.c @@ -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"); |