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authorLingling Xu <ling_ling.xu@unisoc.com>2019-10-28 13:10:30 +0300
committerMark Brown <broonie@kernel.org>2019-10-28 16:16:51 +0300
commit91ea1d70607e374b014b4b9bea771ce661f9f64b (patch)
tree51c1e081e148dc6b4cdf20b1558b6ca9b6cf68eb /drivers/spi/spi-sprd-adi.c
parent6fb7427d84f6ed064776434436485cfb0f6711e9 (diff)
downloadlinux-91ea1d70607e374b014b4b9bea771ce661f9f64b.tar.xz
spi: sprd: adi: Add missing lock protection when rebooting
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>
Diffstat (limited to 'drivers/spi/spi-sprd-adi.c')
-rw-r--r--drivers/spi/spi-sprd-adi.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index 9a051286f120..9613cfe3c0a2 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -393,6 +393,9 @@ 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");