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regulator: fixed: dt: support for input supply

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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>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Laxman Dewangan 2012-07-05 18:12:01 +05:30 committed by Mark Brown
parent 4706fcab9b
commit 6be5bfc3bf
3 changed files with 22 additions and 1 deletions
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2
Documentation/devicetree/bindings/regulator/fixed-regulator.txt
View file

@ -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>;
};

19
drivers/regulator/fixed.c
View file

@ -102,6 +102,9 @@ 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))
config->input_supply = "vin";
return config;
}
@ -169,6 +172,17 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
drvdata->desc.enable_time = config->startup_delay;
if (config->input_supply) {
drvdata->desc.supply_name = kstrdup(config->input_supply,
GFP_KERNEL);
if (!drvdata->desc.supply_name) {
dev_err(&pdev->dev,
"Failed to allocate input supply\n");
ret = -ENOMEM;
goto err_name;
}
}
if (config->microvolts)
drvdata->desc.n_voltages = 1;
@ -202,7 +216,7 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
if (IS_ERR(drvdata->dev)) {
ret = PTR_ERR(drvdata->dev);
dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
goto err_name;
goto err_input;
}
platform_set_drvdata(pdev, drvdata);
@ -212,6 +226,8 @@ static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
return 0;
err_input:
kfree(drvdata->desc.supply_name);
err_name:
kfree(drvdata->desc.name);
err:
@ -223,6 +239,7 @@ static int __devexit reg_fixed_voltage_remove(struct platform_device *pdev)
struct fixed_voltage_data *drvdata = platform_get_drvdata(pdev);
regulator_unregister(drvdata->dev);
kfree(drvdata->desc.supply_name);
kfree(drvdata->desc.name);
return 0;

2
include/linux/regulator/fixed.h
View file

@ -22,6 +22,7 @@ struct regulator_init_data;
/**
* struct fixed_voltage_config - fixed_voltage_config structure
* @supply_name: Name of the regulator supply
* @input_supply: Name of the input regulator supply
* @microvolts: Output voltage of regulator
* @gpio: GPIO to use for enable control
* set to -EINVAL if not used
@ -46,6 +47,7 @@ struct regulator_init_data;
*/
struct fixed_voltage_config {
const char *supply_name;
const char *input_supply;
int microvolts;
int gpio;
unsigned startup_delay;