mfd: mc13xxx: Configure WDI reset

Setup the PMIC to make a restart when a watchdog interrupt occures.
If this is not configured, the PMIC will shut down the power supply
without a restart.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

diff --git a/drivers/mfd/mc13xxx-core.c b/drivers/mfd/mc13xxx-core.c
index 2b6bc868cd3d5502c0908589e98ffa26c0eaa4a8..64dde5d24b3206782d98a8d7066f3780779f9db5 100644 (file)
--- a/drivers/mfd/mc13xxx-core.c
+++ b/drivers/mfd/mc13xxx-core.c
@@ -36,6 +36,9 @@
 #define MC34708_REVISION_FIN           (0x07 <<  6)
 #define MC34708_REVISION_FAB           (0x07 <<  9)
 
+#define MC13XXX_PWRCTRL                15
+#define MC13XXX_PWRCTRL_WDIRESET       (1 << 12)
+
 #define MC13XXX_ADC1           44
 #define MC13XXX_ADC1_ADEN              (1 << 0)
 #define MC13XXX_ADC1_RAND              (1 << 1)
@@ -416,6 +419,11 @@ int mc13xxx_common_init(struct device *dev)
 
        mc13xxx->variant->print_revision(mc13xxx, revision);
 
+       ret = mc13xxx_reg_rmw(mc13xxx, MC13XXX_PWRCTRL,
+                       MC13XXX_PWRCTRL_WDIRESET, MC13XXX_PWRCTRL_WDIRESET);
+       if (ret)
+               return ret;
+
        for (i = 0; i < ARRAY_SIZE(mc13xxx->irqs); i++) {
                mc13xxx->irqs[i].reg_offset = i / MC13XXX_IRQ_PER_REG;
                mc13xxx->irqs[i].mask = BIT(i % MC13XXX_IRQ_PER_REG);