regulator: fan53555: add devicetree support

Add the ability to parse regulator-data from the devicetree.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/fan53555.c b/drivers/regulator/fan53555.c
index 5808435..fa29ba0 100644 (file)
--- a/drivers/regulator/fan53555.c
+++ b/drivers/regulator/fan53555.c
@@ -18,6 +18,8 @@
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/of_device.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/regmap.h>
@@ -252,9 +254,39 @@ static struct regmap_config fan53555_regmap_config = {
        .val_bits = 8,
 };
 
+static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
+                                                       struct device_node *np)
+{
+       struct fan53555_platform_data *pdata;
+       int ret;
+       u32 tmp;
+
+       pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+       if (!pdata)
+               return NULL;
+
+       pdata->regulator = of_get_regulator_init_data(dev, np);
+
+       ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
+                                  &tmp);
+       if (!ret)
+               pdata->sleep_vsel_id = tmp;
+
+       return pdata;
+}
+
+static const struct of_device_id fan53555_dt_ids[] = {
+       {
+               .compatible = "fcs,fan53555",
+       },
+       { }
+};
+MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
+
 static int fan53555_regulator_probe(struct i2c_client *client,
                                const struct i2c_device_id *id)
 {
+       struct device_node *np = client->dev.of_node;
        struct fan53555_device_info *di;
        struct fan53555_platform_data *pdata;
        struct regulator_config config = { };
@@ -262,6 +294,9 @@ static int fan53555_regulator_probe(struct i2c_client *client,
        int ret;
 
        pdata = dev_get_platdata(&client->dev);
+       if (!pdata)
+               pdata = fan53555_parse_dt(&client->dev, np);
+
        if (!pdata || !pdata->regulator) {
                dev_err(&client->dev, "Platform data not found!\n");
                return -ENODEV;
@@ -272,11 +307,15 @@ static int fan53555_regulator_probe(struct i2c_client *client,
        if (!di)
                return -ENOMEM;
 
-       /* if no ramp constraint set, get the pdata ramp_delay */
-       if (!di->regulator->constraints.ramp_delay) {
-               int slew_idx = (pdata->slew_rate & 0x7) ? pdata->slew_rate : 0;
+       if (!client->dev.of_node) {
+               /* if no ramp constraint set, get the pdata ramp_delay */
+               if (!di->regulator->constraints.ramp_delay) {
+                       int slew_idx = (pdata->slew_rate & 0x7)
+                                               ? pdata->slew_rate : 0;
 
-               di->regulator->constraints.ramp_delay = slew_rates[slew_idx];
+                       di->regulator->constraints.ramp_delay
+                                               = slew_rates[slew_idx];
+               }
        }
 
        di->regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
@@ -314,6 +353,8 @@ static int fan53555_regulator_probe(struct i2c_client *client,
        config.init_data = di->regulator;
        config.regmap = di->regmap;
        config.driver_data = di;
+       config.of_node = np;
+
        ret = fan53555_regulator_register(di, &config);
        if (ret < 0)
                dev_err(&client->dev, "Failed to register regulator!\n");
@@ -329,6 +370,7 @@ static const struct i2c_device_id fan53555_id[] = {
 static struct i2c_driver fan53555_regulator_driver = {
        .driver = {
                .name = "fan53555-regulator",
+               .of_match_table = of_match_ptr(fan53555_dt_ids),
        },
        .probe = fan53555_regulator_probe,
        .id_table = fan53555_id,