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Subject[PATCH 2/2] regulator: fixed: dt: support for input supply
Date
Add support for input supply in DT parsing of node.
The input supply will be provided by the property
"vin-supply" in the regulator node.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
.../bindings/regulator/fixed-regulator.txt | 2 ++
drivers/regulator/fixed.c | 12 ++++++++++--
2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
index 2f5b6b1..4fae41d 100644
--- a/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.txt
@@ -10,6 +10,7 @@ Optional properties:
If this property is missing, the default assumed is Active low.
- gpio-open-drain: GPIO is open drain type.
If this property is missing then default assumption is false.
+-vin-supply: Input supply name.

Any property defined as part of the core regulator
binding, defined in regulator.txt, can also be used.
@@ -29,4 +30,5 @@ Example:
enable-active-high;
regulator-boot-on;
gpio-open-drain;
+ vin-supply = <&parent_reg>;
};
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 0a0baf3..8633e21 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -45,13 +45,14 @@ struct fixed_voltage_data {
/**
* of_get_fixed_voltage_config - extract fixed_voltage_config structure info
* @dev: device requesting for fixed_voltage_config
+ * @vin_supply: pointer to store whether input supply is available or not.
*
* Populates fixed_voltage_config structure by extracting data from device
* tree node, returns a pointer to the populated structure of NULL if memory
* alloc fails.
*/
static struct fixed_voltage_config *
-of_get_fixed_voltage_config(struct device *dev)
+of_get_fixed_voltage_config(struct device *dev, bool *vin_supply)
{
struct fixed_voltage_config *config;
struct device_node *np = dev->of_node;
@@ -93,6 +94,9 @@ of_get_fixed_voltage_config(struct device *dev)
if (of_find_property(np, "gpio-open-drain", NULL))
config->gpio_is_open_drain = true;

+ if (of_find_property(np, "vin-supply", NULL))
+ *vin_supply = true;
+
return config;
}

@@ -171,9 +175,10 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
struct fixed_voltage_data *drvdata;
struct regulator_config cfg = { };
int ret;
+ bool vin_supply = false;

if (pdev->dev.of_node)
- config = of_get_fixed_voltage_config(&pdev->dev);
+ config = of_get_fixed_voltage_config(&pdev->dev , &vin_supply);
else
config = pdev->dev.platform_data;

@@ -197,6 +202,9 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
drvdata->desc.type = REGULATOR_VOLTAGE;
drvdata->desc.owner = THIS_MODULE;

+ if (vin_supply)
+ drvdata->desc.supply_name = "vin";
+
if (config->microvolts)
drvdata->desc.n_voltages = 1;

--
1.7.1.1


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