diff options
author | Yadwinder Singh Brar <yadi.brar01@gmail.com> | 2012-07-05 03:58:25 (GMT) |
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committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-07-05 12:42:06 (GMT) |
commit | 4706fcab9b064e6077404ccb6c5ca9c188758068 (patch) | |
tree | 66568c93ff3355ae1200597f2aee8aea813f69a2 /drivers/regulator/max77686.c | |
parent | 6c3b956b94a6547d26c805db7c505429e54e7573 (diff) | |
download | linux-4706fcab9b064e6077404ccb6c5ca9c188758068.tar.xz |
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: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/max77686.c')
-rw-r--r-- | drivers/regulator/max77686.c | 58 |
1 files changed, 57 insertions, 1 deletions
diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c index 23f956a..fc695eb 100644 --- a/drivers/regulator/max77686.c +++ b/drivers/regulator/max77686.c @@ -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; |