regulator: s2mps11: Add DT support

This patch adds DT support for parsing regulators constraints for parent(mfd)
node and moves some common intialising code out of loop while registering.

Signed-off-by: Yadwinder Singh Brar <yadi.brar@samsung.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index 4b84e76..b316d40 100644 (file)
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -16,13 +16,17 @@
 #include <linux/gpio.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/regmap.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/mfd/samsung/core.h>
 #include <linux/mfd/samsung/s2mps11.h>
 
+#define S2MPS11_REGULATOR_CNT ARRAY_SIZE(regulators)
+
 struct s2mps11_info {
        struct regulator_dev *rdev[S2MPS11_REGULATOR_MAX];
 
@@ -407,22 +411,38 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 {
        struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
        struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
+       struct of_regulator_match rdata[S2MPS11_REGULATOR_MAX];
+       struct device_node *reg_np = NULL;
        struct regulator_config config = { };
        struct s2mps11_info *s2mps11;
        int i, ret;
        unsigned char ramp_enable, ramp_reg = 0;
 
-       if (!pdata) {
-               dev_err(pdev->dev.parent, "Platform data not supplied\n");
-               return -ENODEV;
-       }
-
        s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
                                GFP_KERNEL);
        if (!s2mps11)
                return -ENOMEM;
 
-       platform_set_drvdata(pdev, s2mps11);
+       if (!iodev->dev->of_node)
+               goto p_data;
+
+       for (i = 0; i < S2MPS11_REGULATOR_CNT; i++)
+               rdata[i].name = regulators[i].name;
+
+       reg_np = of_find_node_by_name(iodev->dev->of_node, "regulators");
+       if (!reg_np) {
+               dev_err(&pdev->dev, "could not find regulators sub-node\n");
+               return -EINVAL;
+       }
+
+       of_regulator_match(&pdev->dev, reg_np, rdata, S2MPS11_REGULATOR_MAX);
+
+       goto common_reg;
+p_data:
+       if (!pdata) {
+               dev_err(pdev->dev.parent, "Platform data not supplied\n");
+               return -ENODEV;
+       }
 
        s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
        s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
@@ -454,12 +474,19 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
        ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
        sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg);
 
-       for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
+common_reg:
+       platform_set_drvdata(pdev, s2mps11);
 
-               config.dev = &pdev->dev;
-               config.regmap = iodev->regmap;
-               config.init_data = pdata->regulators[i].initdata;
-               config.driver_data = s2mps11;
+       config.dev = &pdev->dev;
+       config.regmap = iodev->regmap;
+       config.driver_data = s2mps11;
+       for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
+               if (!reg_np) {
+                       config.init_data = pdata->regulators[i].initdata;
+               } else {
+                       config.init_data = rdata[i].init_data;
+                       config.of_node = rdata[i].of_node;
+               }
 
                s2mps11->rdev[i] = regulator_register(&regulators[i], &config);
                if (IS_ERR(s2mps11->rdev[i])) {