1 files changed, 25 insertions, 12 deletions

diff --git a/drivers/regulator/max8973-regulator.c b/drivers/regulator/max8973-regulator.c
index b2dbdd70cab1..0c5195a842e2 100644
--- a/drivers/regulator/max8973-regulator.c
+++ b/drivers/regulator/max8973-regulator.c
@@ -26,10 +26,12 @@
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/err.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/max8973-regulator.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
@@ -370,7 +372,8 @@ static int max8973_probe(struct i2c_client *client,
 	int ret;
 
 	pdata = client->dev.platform_data;
-	if (!pdata) {
+
+	if (!pdata && !client->dev.of_node) {
 		dev_err(&client->dev, "No Platform data");
 		return -EIO;
 	}
@@ -400,7 +403,7 @@ static int max8973_probe(struct i2c_client *client,
 	max->desc.uV_step = MAX8973_VOLATGE_STEP;
 	max->desc.n_voltages = MAX8973_BUCK_N_VOLTAGE;
 
-	if (!pdata->enable_ext_control) {
+	if (!pdata || !pdata->enable_ext_control) {
 		max->desc.enable_reg = MAX8973_VOUT;
 		max->desc.enable_mask = MAX8973_VOUT_ENABLE;
 		max->ops.enable = regulator_enable_regmap;
@@ -408,12 +411,17 @@ static int max8973_probe(struct i2c_client *client,
 		max->ops.is_enabled = regulator_is_enabled_regmap;
 	}
 
-	max->enable_external_control = pdata->enable_ext_control;
-	max->dvs_gpio = pdata->dvs_gpio;
-	max->curr_gpio_val = pdata->dvs_def_state;
-	max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
+	if (pdata) {
+		max->dvs_gpio = pdata->dvs_gpio;
+		max->enable_external_control = pdata->enable_ext_control;
+		max->curr_gpio_val = pdata->dvs_def_state;
+		max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
+	} else {
+		max->dvs_gpio = -EINVAL;
+		max->curr_vout_reg = MAX8973_VOUT;
+	}
+
 	max->lru_index[0] = max->curr_vout_reg;
-	max->valid_dvs_gpio = false;
 
 	if (gpio_is_valid(max->dvs_gpio)) {
 		int gpio_flags;
@@ -439,16 +447,21 @@ static int max8973_probe(struct i2c_client *client,
 			max->lru_index[i] = i;
 		max->lru_index[0] = max->curr_vout_reg;
 		max->lru_index[max->curr_vout_reg] = 0;
+	} else {
+		max->valid_dvs_gpio = false;
 	}
 
-	ret = max8973_init_dcdc(max, pdata);
-	if (ret < 0) {
-		dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret);
-		return ret;
+	if (pdata) {
+		ret = max8973_init_dcdc(max, pdata);
+		if (ret < 0) {
+			dev_err(max->dev, "Max8973 Init failed, err = %d\n", ret);
+			return ret;
+		}
 	}
 
 	config.dev = &client->dev;
-	config.init_data = pdata->reg_init_data;
+	config.init_data = pdata ? pdata->reg_init_data :
+		of_get_regulator_init_data(&client->dev, client->dev.of_node);
 	config.driver_data = max;
 	config.of_node = client->dev.of_node;
 	config.regmap = max->regmap;