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Commit 4706fcab authored by Yadwinder Singh Brar's avatar Yadwinder Singh Brar Committed by Mark Brown
Browse files

regulator: max77686: Add device tree support. 



This patch device tree support for regulator driver. It uses the parent
(mfd's) DT node to parse the regulator data for max77686.

Signed-off-by: default avatarYadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 6c3b956b

drivers/regulator/max77686.c

+57 −1
Original line number Diff line number Diff line
@@ -31,6 +31,7 @@ 
#include <linux/platform_device.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/of_regulator.h>

#include <linux/mfd/max77686.h>

#include <linux/mfd/max77686-private.h>
@@ -233,6 +234,50 @@ static struct regulator_desc regulators[] = { 
	regulator_desc_buck(9),

};



#ifdef CONFIG_OF

static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,

					struct max77686_platform_data *pdata)

{

	struct device_node *pmic_np, *regulators_np;

	struct max77686_regulator_data *rdata;

	struct of_regulator_match rmatch;

	unsigned int i;



	pmic_np = iodev->dev->of_node;

	regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators");

	if (!regulators_np) {

		dev_err(iodev->dev, "could not find regulators sub-node\n");

		return -EINVAL;

	}



	pdata->num_regulators = ARRAY_SIZE(regulators);

	rdata = devm_kzalloc(iodev->dev, sizeof(*rdata) *

			     pdata->num_regulators, GFP_KERNEL);

	if (!rdata) {

		dev_err(iodev->dev,

			"could not allocate memory for regulator data\n");

		return -ENOMEM;

	}



	for (i = 0; i < pdata->num_regulators; i++) {

		rmatch.name = regulators[i].name;

		rmatch.init_data = NULL;

		of_regulator_match(iodev->dev, regulators_np, &rmatch, 1);

		rdata[i].initdata = rmatch.init_data;

	}



	pdata->regulators = rdata;



	return 0;

}

#else

static int max77686_pmic_dt_parse_pdata(struct max77686_dev *iodev,

					struct max77686_platform_data *pdata)

{

	return 0;

}

#endif /* CONFIG_OF */



static __devinit int max77686_pmic_probe(struct platform_device *pdev)

{

	struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -245,7 +290,18 @@ static __devinit int max77686_pmic_probe(struct platform_device *pdev) 


	dev_dbg(&pdev->dev, "%s\n", __func__);



	if (!pdata || pdata->num_regulators != MAX77686_REGULATORS) {

	if (!pdata) {

		dev_err(&pdev->dev, "no platform data found for regulator\n");

		return -ENODEV;

	}



	if (iodev->dev->of_node) {

		ret = max77686_pmic_dt_parse_pdata(iodev, pdata);

		if (ret)

			return ret;

	}



	if (pdata->num_regulators != MAX77686_REGULATORS) {

		dev_err(&pdev->dev,

			"Invalid initial data for regulator's initialiation\n");

		return -EINVAL;