regulator: max8925: support dt for regulator

Max8925 Voltage regulators

max8925 regulator device register is still handled by mfd_add_devices, not by

of_xxx, so, it is not necessary to add compatible name. Also, those reg

offset and id info is stored in mfd_cell(see max8925-core.c), as a result

there is not private properties in dts.

node's name should match with the definition in max8925_regulator_matches

(see max8925-regulator.c)

Optional properties:

- Any optional property defined in bindings/regulator/regulator.txt

Example:

	regulators {

		SDV1 {

			regulator-min-microvolt = <637500>;

			regulator-max-microvolt = <1425000>;

			regulator-boot-on;

			regulator-always-on;

		};

		...

		...

	}

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/mfd/max8925.h>

#include <linux/of.h>

#include <linux/regulator/of_regulator.h>

#define SD1_DVM_VMIN		850000

#define SD1_DVM_VMAX		1000000

	.enable_reg	= MAX8925_LDOCTL##_id,			\

}

#ifdef CONFIG_OF

static struct of_regulator_match max8925_regulator_matches[] = {

	{ .name	= "SDV1",},

	{ .name = "SDV2",},

	{ .name = "SDV3",},

	{ .name = "LDO1",},

	{ .name = "LDO2",},

	{ .name = "LDO3",},

	{ .name = "LDO4",},

	{ .name = "LDO5",},

	{ .name = "LDO6",},

	{ .name = "LDO7",},

	{ .name = "LDO8",},

	{ .name = "LDO9",},

	{ .name = "LDO10",},

	{ .name = "LDO11",},

	{ .name = "LDO12",},

	{ .name = "LDO13",},

	{ .name = "LDO14",},

	{ .name = "LDO15",},

	{ .name = "LDO16",},

	{ .name = "LDO17",},

	{ .name = "LDO18",},

	{ .name = "LDO19",},

	{ .name = "LDO20",},

};

#endif

static struct max8925_regulator_info max8925_regulator_info[] = {

	MAX8925_SDV(1, 637.5, 1425, 12.5),

	MAX8925_SDV(2,   650, 2225,   25),

	MAX8925_LDO(20, 750, 3900, 50),

};

#ifdef CONFIG_OF

static int max8925_regulator_dt_init(struct platform_device *pdev,

				    struct max8925_regulator_info *info,

				    struct regulator_config *config,

				    int ridx)

{

	struct device_node *nproot, *np;

	int rcount;

	nproot = pdev->dev.parent->of_node;

	if (!nproot)

		return -ENODEV;

	np = of_find_node_by_name(nproot, "regulators");

	if (!np) {

		dev_err(&pdev->dev, "failed to find regulators node\n");

		return -ENODEV;

	}

	rcount = of_regulator_match(&pdev->dev, np,

				&max8925_regulator_matches[ridx], 1);

	if (rcount < 0)

		return -ENODEV;

	config->init_data =	max8925_regulator_matches[ridx].init_data;

	config->of_node = max8925_regulator_matches[ridx].of_node;

	return 0;

}

#else

#define max8925_regulator_dt_init(w, x, y, z)	(-1)

#endif

static int __devinit max8925_regulator_probe(struct platform_device *pdev)

{

	struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);

	struct max8925_regulator_info *ri;

	struct resource *res;

	struct regulator_dev *rdev;

	int i;

	int i, regulator_idx;

	res = platform_get_resource(pdev, IORESOURCE_REG, 0);

	if (!res) {

	}

	for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {

		ri = &max8925_regulator_info[i];

		if (ri->vol_reg == res->start)

		if (ri->vol_reg == res->start) {

			regulator_idx = i;

			break;

		}

	}

	if (i == ARRAY_SIZE(max8925_regulator_info)) {

		dev_err(&pdev->dev, "Failed to find regulator %llu\n",

			(unsigned long long)res->start);

	ri->chip = chip;

	config.dev = &pdev->dev;

	config.init_data = pdata;

	config.driver_data = ri;

	if (max8925_regulator_dt_init(pdev, ri, &config, regulator_idx))

		if (pdata)

			config.init_data = pdata;

	rdev = regulator_register(&ri->desc, &config);

	if (IS_ERR(rdev)) {

		dev_err(&pdev->dev, "failed to register regulator %s\n",