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Commit a7f1b63e authored by AnilKumar Ch's avatar AnilKumar Ch Committed by Mark Brown
Browse files

regulator: tps65217: Add device tree support 



This commit adds device tree support for tps65217 pmic. And usage
details are added to device tree documentation. Driver is tested
by using kernel module with regulator set and get APIs.

Signed-off-by: default avatarAnilKumar Ch <anilkumar@ti.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 257ee3c6

Documentation/devicetree/bindings/regulator/tps65217.txt

0 → 100644
+91 −0
Original line number Diff line number Diff line 
TPS65217 family of regulators



Required properties:

- compatible: "ti,tps65217"

- reg: I2C slave address

- regulators: list of regulators provided by this controller, must be named

  after their hardware counterparts: dcdc[1-3] and ldo[1-4]

- regulators: This is the list of child nodes that specify the regulator

  initialization data for defined regulators. Not all regulators for the given

  device need to be present. The definition for each of these nodes is defined

  using the standard binding for regulators found at

  Documentation/devicetree/bindings/regulator/regulator.txt.



  The valid names for regulators are:

  tps65217: dcdc1, dcdc2, dcdc3, ldo1, ldo2, ldo3 and ldo4



Each regulator is defined using the standard binding for regulators.



Example:



	tps: tps@24 {

		compatible = "ti,tps65217";



		regulators {

			#address-cells = <1>;

			#size-cells = <0>;



			dcdc1_reg: regulator@0 {

				reg = <0>;

				regulator-compatible = "dcdc1";

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <1800000>;

				regulator-boot-on;

				regulator-always-on;

			};



			dcdc2_reg: regulator@1 {

				reg = <1>;

				regulator-compatible = "dcdc2";

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <3300000>;

				regulator-boot-on;

				regulator-always-on;

			};



			dcdc3_reg: regulator@2 {

				reg = <2>;

				regulator-compatible = "dcdc3";

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <1500000>;

				regulator-boot-on;

				regulator-always-on;

			};



			ldo1_reg: regulator@3 {

				reg = <3>;

				regulator-compatible = "ldo1";

				regulator-min-microvolt = <1000000>;

				regulator-max-microvolt = <3300000>;

				regulator-boot-on;

				regulator-always-on;

			};



			ldo2_reg: regulator@4 {

				reg = <4>;

				regulator-compatible = "ldo2";

				regulator-min-microvolt = <900000>;

				regulator-max-microvolt = <3300000>;

				regulator-boot-on;

				regulator-always-on;

			};



			ldo3_reg: regulator@5 {

				reg = <5>;

				regulator-compatible = "ldo3";

				regulator-min-microvolt = <1800000>;

				regulator-max-microvolt = <3300000>;

				regulator-boot-on;

				regulator-always-on;

			};



			ldo4_reg: regulator@6 {

				reg = <6>;

				regulator-compatible = "ldo4";

				regulator-min-microvolt = <1800000>;

				regulator-max-microvolt = <3300000>;

				regulator-boot-on;

				regulator-always-on;

			};

		};

	};

drivers/mfd/tps65217.c

+65 −2
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/slab.h>

#include <linux/regmap.h>

#include <linux/err.h>

#include <linux/regulator/of_regulator.h>



#include <linux/mfd/core.h>

#include <linux/mfd/tps65217.h>
@@ -132,6 +133,61 @@ int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg, 
}

EXPORT_SYMBOL_GPL(tps65217_clear_bits);



#ifdef CONFIG_OF

static struct of_regulator_match reg_matches[] = {

	{ .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },

	{ .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },

	{ .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },

	{ .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },

	{ .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },

	{ .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },

	{ .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },

};



static struct tps65217_board *tps65217_parse_dt(struct i2c_client *client)

{

	struct device_node *node = client->dev.of_node;

	struct tps65217_board *pdata;

	struct device_node *regs;

	int count = ARRAY_SIZE(reg_matches);

	int ret, i;



	regs = of_find_node_by_name(node, "regulators");

	if (!regs)

		return NULL;



	ret = of_regulator_match(&client->dev, regs, reg_matches, count);

	of_node_put(regs);

	if ((ret < 0) || (ret > count))

		return NULL;



	count = ret;

	pdata = devm_kzalloc(&client->dev, count * sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

		return NULL;



	for (i = 0; i < count; i++) {

		if (!reg_matches[i].init_data || !reg_matches[i].of_node)

			continue;



		pdata->tps65217_init_data[i] = reg_matches[i].init_data;

		pdata->of_node[i] = reg_matches[i].of_node;

	}



	return pdata;

}



static struct of_device_id tps65217_of_match[] = {

	{ .compatible = "ti,tps65217", },

	{ },

};

#else

static struct tps65217_board *tps65217_parse_dt(struct i2c_client *client)

{

	return NULL;

}

#endif



static struct regmap_config tps65217_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,
@@ -141,10 +197,14 @@ static int __devinit tps65217_probe(struct i2c_client *client, 
				const struct i2c_device_id *ids)

{

	struct tps65217 *tps;

	struct regulator_init_data *reg_data;

	struct tps65217_board *pdata = client->dev.platform_data;

	int i, ret;

	unsigned int version;



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

		pdata = tps65217_parse_dt(client);



	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);

	if (!tps)

		return -ENOMEM;
@@ -182,8 +242,9 @@ static int __devinit tps65217_probe(struct i2c_client *client, 
		}



		pdev->dev.parent = tps->dev;

		platform_device_add_data(pdev, &pdata->tps65217_init_data[i],

					sizeof(pdata->tps65217_init_data[i]));

		pdev->dev.of_node = pdata->of_node[i];

		reg_data = pdata->tps65217_init_data[i];

		platform_device_add_data(pdev, reg_data, sizeof(*reg_data));

		tps->regulator_pdev[i] = pdev;



		platform_device_add(pdev);
@@ -212,6 +273,8 @@ MODULE_DEVICE_TABLE(i2c, tps65217_id_table); 
static struct i2c_driver tps65217_driver = {

	.driver		= {

		.name	= "tps65217",

		.owner	= THIS_MODULE,

		.of_match_table = of_match_ptr(tps65217_of_match),

	},

	.id_table	= tps65217_id_table,

	.probe		= tps65217_probe,

drivers/regulator/tps65217-regulator.c

+1 −0
Original line number Diff line number Diff line
@@ -293,6 +293,7 @@ static int __devinit tps65217_regulator_probe(struct platform_device *pdev) 
	tps->info[pdev->id] = info;



	config.dev = &pdev->dev;

	config.of_node = pdev->dev.of_node;

	config.init_data = pdev->dev.platform_data;

	config.driver_data = tps;

include/linux/mfd/tps65217.h

+2 −1
Original line number Diff line number Diff line
@@ -217,7 +217,8 @@ enum tps65217_regulator_id { 
 * Board data may be used to initialize regulator.

 */

struct tps65217_board {

	struct regulator_init_data *tps65217_init_data;

	struct regulator_init_data *tps65217_init_data[TPS65217_NUM_REGULATOR];

	struct device_node *of_node[TPS65217_NUM_REGULATOR];

};



/**