mfd: palmas: Add power off control
Hook up "pm_power_off" to palmas power off routine if there is DT
property "ti,system-power-controller" defined, so platform which is
powered by this regulator can be powered off properly.
Acked-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Mallikarjun Kasoju <mkasoju@nvidia.com>
Signed-off-by: Bill Huang <bilhuang@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/palmas.c b/drivers/mfd/palmas.c
index e4d1c70..220a34d 100644
--- a/drivers/mfd/palmas.c
+++ b/drivers/mfd/palmas.c
@@ -229,6 +229,32 @@
PALMAS_POWER_CTRL_ENABLE2_MASK;
if (i2c->irq)
palmas_set_pdata_irq_flag(i2c, pdata);
+
+ pdata->pm_off = of_property_read_bool(node,
+ "ti,system-power-controller");
+}
+
+static struct palmas *palmas_dev;
+static void palmas_power_off(void)
+{
+ unsigned int addr;
+ int ret, slave;
+
+ if (!palmas_dev)
+ return;
+
+ slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);
+ addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_DEV_CTRL);
+
+ ret = regmap_update_bits(
+ palmas_dev->regmap[slave],
+ addr,
+ PALMAS_DEV_CTRL_DEV_ON,
+ 0);
+
+ if (ret)
+ pr_err("%s: Unable to write to DEV_CTRL_DEV_ON: %d\n",
+ __func__, ret);
}
static unsigned int palmas_features = PALMAS_PMIC_FEATURE_SMPS10_BOOST;
@@ -423,10 +449,13 @@
*/
if (node) {
ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
- if (ret < 0)
+ if (ret < 0) {
goto err_irq;
- else
+ } else if (pdata->pm_off && !pm_power_off) {
+ palmas_dev = palmas;
+ pm_power_off = palmas_power_off;
return ret;
+ }
}
return ret;