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Commit c51ce403 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Mark Brown
Browse files

regulator: tps51632: add DT support 



Add DT support for the TI TPS51632. Add device binding document also.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent faa3b2d5

Documentation/devicetree/bindings/regulator/tps51632-regulator.txt

0 → 100644
+27 −0
Original line number Diff line number Diff line 
TPS51632 Voltage regulators



Required properties:

- compatible: Must be "ti,tps51632"

- reg: I2C slave address



Optional properties:

- ti,enable-pwm-dvfs: Enable the DVFS voltage control through the PWM interface.

- ti,dvfs-step-20mV: The 20mV step voltage when PWM DVFS enabled. Missing this

	will set 10mV step voltage in PWM DVFS mode. In normal mode, the voltage

	step is 10mV as per datasheet.



Any property defined as part of the core regulator binding, defined in

regulator.txt, can also be used.



Example:



	tps51632 {

		compatible = "ti,tps51632";

		reg =  <0x43>;

		regulator-name = "tps51632-vout";

		regulator-min-microvolt = <500000>;

		regulator-max-microvolt = <1500000>;

		regulator-boot-on;

		ti,enable-pwm-dvfs;

		ti,dvfs-step-20mV;

	};

drivers/regulator/tps51632-regulator.c

+59 −0
Original line number Diff line number Diff line
@@ -28,10 +28,13 @@ 
#include <linux/init.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_device.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/regulator/tps51632-regulator.h>

#include <linux/slab.h>
@@ -252,6 +255,49 @@ static const struct regmap_config tps51632_regmap_config = { 
	.cache_type		= REGCACHE_RBTREE,

};



#if defined(CONFIG_OF)

static const struct of_device_id tps51632_of_match[] = {

	{ .compatible = "ti,tps51632",},

	{},

};

MODULE_DEVICE_TABLE(of, tps51632_of_match);



static struct tps51632_regulator_platform_data *

	of_get_tps51632_platform_data(struct device *dev)

{

	struct tps51632_regulator_platform_data *pdata;

	struct device_node *np = dev->of_node;



	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata) {

		dev_err(dev, "Memory alloc failed for platform data\n");

		return NULL;

	}



	pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node);

	if (!pdata->reg_init_data) {

		dev_err(dev, "Not able to get OF regulator init data\n");

		return NULL;

	}



	pdata->enable_pwm_dvfs =

			of_property_read_bool(np, "ti,enable-pwm-dvfs");

	pdata->dvfs_step_20mV = of_property_read_bool(np, "ti,dvfs-step-20mV");



	pdata->base_voltage_uV = pdata->reg_init_data->constraints.min_uV ? :

					TPS51632_MIN_VOLATGE;

	pdata->max_voltage_uV = pdata->reg_init_data->constraints.max_uV ? :

					TPS51632_MAX_VOLATGE;

	return pdata;

}

#else

static struct tps51632_regulator_platform_data *

	of_get_tps51632_platform_data(struct device *dev)

{

	return NULL;

}

#endif



static int tps51632_probe(struct i2c_client *client,

				const struct i2c_device_id *id)

{
@@ -261,7 +307,19 @@ static int tps51632_probe(struct i2c_client *client, 
	int ret;

	struct regulator_config config = { };



	if (client->dev.of_node) {

		const struct of_device_id *match;

		match = of_match_device(of_match_ptr(tps51632_of_match),

				&client->dev);

		if (!match) {

			dev_err(&client->dev, "Error: No device match found\n");

			return -ENODEV;

		}

	}



	pdata = client->dev.platform_data;

	if (!pdata && client->dev.of_node)

		pdata = of_get_tps51632_platform_data(&client->dev);

	if (!pdata) {

		dev_err(&client->dev, "No Platform data\n");

		return -EINVAL;
@@ -350,6 +408,7 @@ static struct i2c_driver tps51632_i2c_driver = { 
	.driver = {

		.name = "tps51632",

		.owner = THIS_MODULE,

		.of_match_table = of_match_ptr(tps51632_of_match),

	},

	.probe = tps51632_probe,

	.remove = tps51632_remove,