regulator: max77686: Remove support for board files

The driver is used only on Exynos based boards with DTS support.
Simplify the driver and remove dead (unused) entries in platform_data
structure.

Convert the driver to DTS-only version. Parse all regulators at once,
not one-by-one. Remove dependency on data provided by max77686 MFD
driver. Use new DT style parsing method for regulators init data.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 19 insertions, 72 deletions

diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index 2063532e0763..871b96bcd2d0 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -281,6 +281,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 
 #define regulator_desc_ldo(num)         {                               \
         .name           = "LDO"#num,                                    \
+        .of_match       = of_match_ptr("LDO"#num),                      \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_LDO##num,                            \
         .ops            = &max77686_ops,                                \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -297,6 +299,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_lpm_ldo(num)     {                               \
         .name           = "LDO"#num,                                    \
+        .of_match       = of_match_ptr("LDO"#num),                      \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_LDO##num,                            \
         .ops            = &max77686_ldo_ops,                            \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -313,6 +317,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_ldo_low(num)             {                       \
         .name           = "LDO"#num,                                    \
+        .of_match       = of_match_ptr("LDO"#num),                      \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_LDO##num,                            \
         .ops            = &max77686_ldo_ops,                            \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -329,6 +335,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_ldo1_low(num)            {                       \
         .name           = "LDO"#num,                                    \
+        .of_match       = of_match_ptr("LDO"#num),                      \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_LDO##num,                            \
         .ops            = &max77686_ops,                                \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -345,6 +353,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_buck(num)                {                       \
         .name           = "BUCK"#num,                                   \
+        .of_match       = of_match_ptr("BUCK"#num),                     \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_BUCK##num,                           \
         .ops            = &max77686_ops,                                \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -360,6 +370,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_buck1(num)               {                       \
         .name           = "BUCK"#num,                                   \
+        .of_match       = of_match_ptr("BUCK"#num),                     \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_BUCK##num,                           \
         .ops            = &max77686_buck1_ops,                          \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -375,6 +387,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 }
 #define regulator_desc_buck_dvs(num)            {                       \
         .name           = "BUCK"#num,                                   \
+        .of_match       = of_match_ptr("BUCK"#num),                     \
+        .regulators_node        = of_match_ptr("voltage-regulators"),   \
         .id             = MAX77686_BUCK##num,                           \
         .ops            = &max77686_buck_dvs_ops,                       \
         .type           = REGULATOR_VOLTAGE,                            \
@@ -428,86 +442,21 @@ static const struct regulator_desc regulators[] = {
         regulator_desc_buck(9),
 };
 
-#ifdef CONFIG_OF
-static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
-                                        struct max77686_platform_data *pdata)
-{
-        struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
-        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_get_child_by_name(pmic_np, "voltage-regulators");
-        if (!regulators_np) {
-                dev_err(&pdev->dev, "could not find regulators sub-node\n");
-                return -EINVAL;
-        }
-
-        pdata->num_regulators = ARRAY_SIZE(regulators);
-        rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) *
-                             pdata->num_regulators, GFP_KERNEL);
-        if (!rdata) {
-                of_node_put(regulators_np);
-                return -ENOMEM;
-        }
-
-        for (i = 0; i < pdata->num_regulators; i++) {
-                rmatch.name = regulators[i].name;
-                rmatch.init_data = NULL;
-                rmatch.of_node = NULL;
-                of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1);
-                rdata[i].initdata = rmatch.init_data;
-                rdata[i].of_node = rmatch.of_node;
-        }
-
-        pdata->regulators = rdata;
-        of_node_put(regulators_np);
-
-        return 0;
-}
-#else
-static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev,
-                                        struct max77686_platform_data *pdata)
-{
-        return 0;
-}
-#endif /* CONFIG_OF */
-
 static int max77686_pmic_probe(struct platform_device *pdev)
 {
         struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent);
-        struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev);
         struct max77686_data *max77686;
-        int i, ret = 0;
+        int i;
         struct regulator_config config = { };
 
         dev_dbg(&pdev->dev, "%s\n", __func__);
 
-        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(pdev, 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;
-        }
-
         max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data),
                                 GFP_KERNEL);
         if (!max77686)
                 return -ENOMEM;
 
-        config.dev = &pdev->dev;
+        config.dev = iodev->dev;
         config.regmap = iodev->regmap;
         config.driver_data = max77686;
         platform_set_drvdata(pdev, max77686);
@@ -516,16 +465,14 @@ static int max77686_pmic_probe(struct platform_device *pdev)
                 struct regulator_dev *rdev;
                 int id = regulators[i].id;
 
-                config.init_data = pdata->regulators[i].initdata;
-                config.of_node = pdata->regulators[i].of_node;
-
                 max77686->opmode[id] = MAX77686_NORMAL;
                 rdev = devm_regulator_register(&pdev->dev,
                                                 &regulators[i], &config);
                 if (IS_ERR(rdev)) {
+                        int ret = PTR_ERR(rdev);
                         dev_err(&pdev->dev,
-                                "regulator init failed for %d\n", i);
-                        return PTR_ERR(rdev);
+                                "regulator init failed for %d: %d\n", i, ret);
+                        return ret;
                 }
         }