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path: root/drivers/spi/spi-sprd-adi.c
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Diffstat (limited to 'drivers/spi/spi-sprd-adi.c')
-rw-r--r--drivers/spi/spi-sprd-adi.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index 9a051286f120..87dadb6b8ebf 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -77,6 +77,7 @@
/* Bits definitions for register REG_WDG_CTRL */
#define BIT_WDG_RUN BIT(1)
+#define BIT_WDG_NEW BIT(2)
#define BIT_WDG_RST BIT(3)
/* Registers definitions for PMIC */
@@ -383,6 +384,10 @@ static int sprd_adi_restart_handler(struct notifier_block *this,
/* Unlock the watchdog */
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOCK, WDG_UNLOCK_KEY);
+ sprd_adi_read(sadi, sadi->slave_pbase + REG_WDG_CTRL, &val);
+ val |= BIT_WDG_NEW;
+ sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_CTRL, val);
+
/* Load the watchdog timeout value, 50ms is always enough. */
sprd_adi_write(sadi, sadi->slave_pbase + REG_WDG_LOAD_LOW,
WDG_LOAD_VAL & WDG_LOAD_MASK);
@@ -393,6 +398,9 @@ 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");