4 files changed, 86 insertions, 1 deletions

diff --git a/drivers/regulator/arizona-ldo1.c b/drivers/regulator/arizona-ldo1.c
index f7c88ff90c43..302b57cb89c6 100644
--- a/drivers/regulator/arizona-ldo1.c
+++ b/drivers/regulator/arizona-ldo1.c
@@ -130,6 +130,7 @@ static const struct regulator_desc arizona_ldo1_hc = {
 	.uV_step = 50000,
 	.n_voltages = 8,
 	.enable_time = 1500,
+	.ramp_delay = 24000,
 
 	.owner = THIS_MODULE,
 };
@@ -153,6 +154,7 @@ static const struct regulator_desc arizona_ldo1 = {
 	.uV_step = 25000,
 	.n_voltages = 13,
 	.enable_time = 500,
+	.ramp_delay = 24000,
 
 	.owner = THIS_MODULE,
 };
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index ee13c47addf1..04baac9a165b 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -3360,6 +3360,39 @@ unsigned int regulator_get_mode(struct regulator *regulator)
 }
 EXPORT_SYMBOL_GPL(regulator_get_mode);
 
+static int _regulator_get_error_flags(struct regulator_dev *rdev,
+					unsigned int *flags)
+{
+	int ret;
+
+	mutex_lock(&rdev->mutex);
+
+	/* sanity check */
+	if (!rdev->desc->ops->get_error_flags) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ret = rdev->desc->ops->get_error_flags(rdev, flags);
+out:
+	mutex_unlock(&rdev->mutex);
+	return ret;
+}
+
+/**
+ * regulator_get_error_flags - get regulator error information
+ * @regulator: regulator source
+ * @flags: pointer to store error flags
+ *
+ * Get the current regulator error information.
+ */
+int regulator_get_error_flags(struct regulator *regulator,
+				unsigned int *flags)
+{
+	return _regulator_get_error_flags(regulator->rdev, flags);
+}
+EXPORT_SYMBOL_GPL(regulator_get_error_flags);
+
 /**
  * regulator_set_load - set regulator load
  * @regulator: regulator source
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 988a7472c2ab..a43b0e8a438d 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -30,6 +30,9 @@
 #include <linux/of_gpio.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/machine.h>
+#include <linux/acpi.h>
+#include <linux/property.h>
+#include <linux/gpio/consumer.h>
 
 struct fixed_voltage_data {
 	struct regulator_desc desc;
@@ -94,6 +97,44 @@ of_get_fixed_voltage_config(struct device *dev,
 	return config;
 }
 
+/**
+ * acpi_get_fixed_voltage_config - extract fixed_voltage_config structure info
+ * @dev: device requesting for fixed_voltage_config
+ * @desc: regulator description
+ *
+ * Populates fixed_voltage_config structure by extracting data through ACPI
+ * interface, returns a pointer to the populated structure of NULL if memory
+ * alloc fails.
+ */
+static struct fixed_voltage_config *
+acpi_get_fixed_voltage_config(struct device *dev,
+			      const struct regulator_desc *desc)
+{
+	struct fixed_voltage_config *config;
+	const char *supply_name;
+	struct gpio_desc *gpiod;
+	int ret;
+
+	config = devm_kzalloc(dev, sizeof(*config), GFP_KERNEL);
+	if (!config)
+		return ERR_PTR(-ENOMEM);
+
+	ret = device_property_read_string(dev, "supply-name", &supply_name);
+	if (!ret)
+		config->supply_name = supply_name;
+
+	gpiod = gpiod_get(dev, "gpio", GPIOD_ASIS);
+	if (IS_ERR(gpiod))
+		return ERR_PTR(-ENODEV);
+
+	config->gpio = desc_to_gpio(gpiod);
+	config->enable_high = device_property_read_bool(dev,
+							"enable-active-high");
+	gpiod_put(gpiod);
+
+	return config;
+}
+
 static struct regulator_ops fixed_voltage_ops = {
 };
 
@@ -114,6 +155,11 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 						     &drvdata->desc);
 		if (IS_ERR(config))
 			return PTR_ERR(config);
+	} else if (ACPI_HANDLE(&pdev->dev)) {
+		config = acpi_get_fixed_voltage_config(&pdev->dev,
+						       &drvdata->desc);
+		if (IS_ERR(config))
+			return PTR_ERR(config);
 	} else {
 		config = dev_get_platdata(&pdev->dev);
 	}
diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
index bcf38fd5106a..379cdacc05d8 100644
--- a/drivers/regulator/helpers.c
+++ b/drivers/regulator/helpers.c
@@ -454,13 +454,17 @@ EXPORT_SYMBOL_GPL(regulator_set_bypass_regmap);
 int regulator_get_bypass_regmap(struct regulator_dev *rdev, bool *enable)
 {
 	unsigned int val;
+	unsigned int val_on = rdev->desc->bypass_val_on;
 	int ret;
 
 	ret = regmap_read(rdev->regmap, rdev->desc->bypass_reg, &val);
 	if (ret != 0)
 		return ret;
 
-	*enable = (val & rdev->desc->bypass_mask) == rdev->desc->bypass_val_on;
+	if (!val_on)
+		val_on = rdev->desc->bypass_mask;
+
+	*enable = (val & rdev->desc->bypass_mask) == val_on;
 
 	return 0;
 }