regulator: tps51632: add DT support

Add DT support for the TI TPS51632. Add device binding document also.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c
index b96fb0e15a82..7560d0768b77 100644
--- a/drivers/regulator/tps51632-regulator.c
+++ b/drivers/regulator/tps51632-regulator.c
@@ -28,10 +28,13 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
 #include <linux/regulator/tps51632-regulator.h>
 #include <linux/slab.h>
 
@@ -252,6 +255,49 @@ static const struct regmap_config tps51632_regmap_config = {
         .cache_type             = REGCACHE_RBTREE,
 };
 
+#if defined(CONFIG_OF)
+static const struct of_device_id tps51632_of_match[] = {
+        { .compatible = "ti,tps51632",},
+        {},
+};
+MODULE_DEVICE_TABLE(of, tps51632_of_match);
+
+static struct tps51632_regulator_platform_data *
+        of_get_tps51632_platform_data(struct device *dev)
+{
+        struct tps51632_regulator_platform_data *pdata;
+        struct device_node *np = dev->of_node;
+
+        pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+        if (!pdata) {
+                dev_err(dev, "Memory alloc failed for platform data\n");
+                return NULL;
+        }
+
+        pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node);
+        if (!pdata->reg_init_data) {
+                dev_err(dev, "Not able to get OF regulator init data\n");
+                return NULL;
+        }
+
+        pdata->enable_pwm_dvfs =
+                        of_property_read_bool(np, "ti,enable-pwm-dvfs");
+        pdata->dvfs_step_20mV = of_property_read_bool(np, "ti,dvfs-step-20mV");
+
+        pdata->base_voltage_uV = pdata->reg_init_data->constraints.min_uV ? :
+                                        TPS51632_MIN_VOLATGE;
+        pdata->max_voltage_uV = pdata->reg_init_data->constraints.max_uV ? :
+                                        TPS51632_MAX_VOLATGE;
+        return pdata;
+}
+#else
+static struct tps51632_regulator_platform_data *
+        of_get_tps51632_platform_data(struct device *dev)
+{
+        return NULL;
+}
+#endif
+
 static int tps51632_probe(struct i2c_client *client,
                                 const struct i2c_device_id *id)
 {
@@ -261,7 +307,19 @@ static int tps51632_probe(struct i2c_client *client,
         int ret;
         struct regulator_config config = { };
 
+        if (client->dev.of_node) {
+                const struct of_device_id *match;
+                match = of_match_device(of_match_ptr(tps51632_of_match),
+                                &client->dev);
+                if (!match) {
+                        dev_err(&client->dev, "Error: No device match found\n");
+                        return -ENODEV;
+                }
+        }
+
         pdata = client->dev.platform_data;
+        if (!pdata && client->dev.of_node)
+                pdata = of_get_tps51632_platform_data(&client->dev);
         if (!pdata) {
                 dev_err(&client->dev, "No Platform data\n");
                 return -EINVAL;
@@ -350,6 +408,7 @@ static struct i2c_driver tps51632_i2c_driver = {
         .driver = {
                 .name = "tps51632",
                 .owner = THIS_MODULE,
+                .of_match_table = of_match_ptr(tps51632_of_match),
         },
         .probe = tps51632_probe,
         .remove = tps51632_remove,