regulator: as3711: add OF support

AS3711 regulator OF support only evaluates standard regulator DT
properties.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Reviwed-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/as3711-regulator.c b/drivers/regulator/as3711-regulator.c
index f0ba8c4eefa95099ebb9a14912a3cf302f38365d..0539b3e8f83b1a608ea293261bfe682bf0092cf4 100644 (file)
--- a/drivers/regulator/as3711-regulator.c
+++ b/drivers/regulator/as3711-regulator.c
@@ -13,9 +13,11 @@
 #include <linux/init.h>
 #include <linux/mfd/as3711.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/slab.h>
 
 struct as3711_regulator_info {
@@ -276,6 +278,60 @@ static struct as3711_regulator_info as3711_reg_info[] = {
 
 #define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_info)
 
+static const char *as3711_regulator_of_names[AS3711_REGULATOR_NUM] = {
+       [AS3711_REGULATOR_SD_1] = "sd1",
+       [AS3711_REGULATOR_SD_2] = "sd2",
+       [AS3711_REGULATOR_SD_3] = "sd3",
+       [AS3711_REGULATOR_SD_4] = "sd4",
+       [AS3711_REGULATOR_LDO_1] = "ldo1",
+       [AS3711_REGULATOR_LDO_2] = "ldo2",
+       [AS3711_REGULATOR_LDO_3] = "ldo3",
+       [AS3711_REGULATOR_LDO_4] = "ldo4",
+       [AS3711_REGULATOR_LDO_5] = "ldo5",
+       [AS3711_REGULATOR_LDO_6] = "ldo6",
+       [AS3711_REGULATOR_LDO_7] = "ldo7",
+       [AS3711_REGULATOR_LDO_8] = "ldo8",
+};
+
+static int as3711_regulator_parse_dt(struct device *dev,
+                               struct device_node **of_node, const int count)
+{
+       struct as3711_regulator_pdata *pdata = dev_get_platdata(dev);
+       struct device_node *regulators =
+               of_find_node_by_name(dev->parent->of_node, "regulators");
+       struct of_regulator_match *matches, *match;
+       int ret, i;
+
+       if (!regulators) {
+               dev_err(dev, "regulator node not found\n");
+               return -ENODEV;
+       }
+
+       matches = devm_kzalloc(dev, sizeof(*matches) * count, GFP_KERNEL);
+       if (!matches)
+               return -ENOMEM;
+
+       for (i = 0, match = matches; i < count; i++, match++) {
+               match->name = as3711_regulator_of_names[i];
+               match->driver_data = as3711_reg_info + i;
+       }
+
+       ret = of_regulator_match(dev->parent, regulators, matches, count);
+       of_node_put(regulators);
+       if (ret < 0) {
+               dev_err(dev, "Error parsing regulator init data: %d\n", ret);
+               return ret;
+       }
+
+       for (i = 0, match = matches; i < count; i++, match++)
+               if (match->of_node) {
+                       pdata->init_data[i] = match->init_data;
+                       of_node[i] = match->of_node;
+               }
+
+       return 0;
+}
+
 static int as3711_regulator_probe(struct platform_device *pdev)
 {
        struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);
@@ -284,13 +340,24 @@ static int as3711_regulator_probe(struct platform_device *pdev)
        struct regulator_config config = {.dev = &pdev->dev,};
        struct as3711_regulator *reg = NULL;
        struct as3711_regulator *regs;
+       struct device_node *of_node[AS3711_REGULATOR_NUM] = {};
        struct regulator_dev *rdev;
        struct as3711_regulator_info *ri;
        int ret;
        int id;
 
-       if (!pdata)
-               dev_dbg(&pdev->dev, "No platform data...\n");
+       if (!pdata) {
+               dev_err(&pdev->dev, "No platform data...\n");
+               return -ENODEV;
+       }
+
+       if (pdev->dev.parent->of_node) {
+               ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM);
+               if (ret < 0) {
+                       dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
+                       return ret;
+               }
+       }
 
        regs = devm_kzalloc(&pdev->dev, AS3711_REGULATOR_NUM *
                        sizeof(struct as3711_regulator), GFP_KERNEL);
@@ -300,7 +367,7 @@ static int as3711_regulator_probe(struct platform_device *pdev)
        }
 
        for (id = 0, ri = as3711_reg_info; id < AS3711_REGULATOR_NUM; ++id, ri++) {
-               reg_data = pdata ? pdata->init_data[id] : NULL;
+               reg_data = pdata->init_data[id];
 
                /* No need to register if there is no regulator data */
                if (!reg_data)
@@ -312,6 +379,7 @@ static int as3711_regulator_probe(struct platform_device *pdev)
                config.init_data = reg_data;
                config.driver_data = reg;
                config.regmap = as3711->regmap;
+               config.of_node = of_node[id];
 
                rdev = regulator_register(&ri->desc, &config);
                if (IS_ERR(rdev)) {