mfd: max8907: Add power off control
Add DT property "maxim,system-power-controller" to indicate whether the
PMIC is in charge of controlling the system power. If this is set, the
driver will provide the pm_power_off() function.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/Documentation/devicetree/bindings/regulator/max8907.txt b/Documentation/devicetree/bindings/regulator/max8907.txt
index 4fd847f..51e683b 100644
--- a/Documentation/devicetree/bindings/regulator/max8907.txt
+++ b/Documentation/devicetree/bindings/regulator/max8907.txt
@@ -16,6 +16,10 @@
property, with valid values listed below. The content of each sub-node
is defined by the standard binding for regulators; see regulator.txt.
+Optional properties:
+- maxim,system-power-controller: Boolean property indicating that the PMIC
+ controls the overall system power.
+
Valid regulator-compatible values are:
sd1, sd2, sd3, ldo1, ldo2, ldo3, ldo4, ldo5, ldo6, ldo7, ldo8, ldo9, ldo10,
@@ -29,6 +33,8 @@
reg = <0x3c>;
interrupts = <0 86 0x4>;
+ maxim,system-power-controller;
+
mbatt-supply = <&some_reg>;
in-v1-supply = <&mbatt_reg>;
...
diff --git a/drivers/mfd/max8907.c b/drivers/mfd/max8907.c
index 6497c98..2303641 100644
--- a/drivers/mfd/max8907.c
+++ b/drivers/mfd/max8907.c
@@ -176,11 +176,26 @@
.num_irqs = ARRAY_SIZE(max8907_rtc_irqs),
};
+struct max8907 *max8907_pm_off;
+static void max8907_power_off(void)
+{
+ regmap_update_bits(max8907_pm_off->regmap_gen, MAX8907_REG_RESET_CNFG,
+ MAX8907_MASK_POWER_OFF, MAX8907_MASK_POWER_OFF);
+}
+
static __devinit int max8907_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max8907 *max8907;
int ret;
+ struct max8907_platform_data *pdata = dev_get_platdata(&i2c->dev);
+ bool pm_off = false;
+
+ if (pdata)
+ pm_off = pdata->pm_off;
+ else if (i2c->dev.of_node)
+ pm_off = of_property_read_bool(i2c->dev.of_node,
+ "maxim,system-power-controller");
max8907 = devm_kzalloc(&i2c->dev, sizeof(struct max8907), GFP_KERNEL);
if (!max8907) {
@@ -251,6 +266,11 @@
goto err_add_devices;
}
+ if (pm_off && !pm_power_off) {
+ max8907_pm_off = max8907;
+ pm_power_off = max8907_power_off;
+ }
+
return 0;
err_add_devices:
diff --git a/include/linux/mfd/max8907.h b/include/linux/mfd/max8907.h
index 283531f..b06f7a6 100644
--- a/include/linux/mfd/max8907.h
+++ b/include/linux/mfd/max8907.h
@@ -167,6 +167,7 @@
#define MAX8907_MASK_OUT5V_VINEN 0x10
#define MAX8907_MASK_OUT5V_ENSRC 0x0E
#define MAX8907_MASK_OUT5V_EN 0x01
+#define MAX8907_MASK_POWER_OFF 0x40
/* Regulator IDs */
#define MAX8907_MBATT 0
@@ -231,6 +232,7 @@
struct max8907_platform_data {
struct regulator_init_data *init_data[MAX8907_NUM_REGULATORS];
+ bool pm_off;
};
struct regmap_irq_chips_data;
