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>
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 @@
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 @@
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;