regulator: fan53555: add devicetree support
From: Heiko Stuebner <heiko@...> Date: Tue, 16 Sep 2014 16:21:19 +0200
Commit-Message
Add the ability to parse regulator-data from the devicetree. Signed-off-by: Heiko Stuebner <heiko@...>
Patch-Comment
drivers/regulator/fan53555.c | 50 ++++++++++++++++++++++++++++++++++++++++---- 1 file changed, 46 insertions(+), 4 deletions(-)
Statistics
- 46 lines added
- 4 lines removed
Changes
------------------------- drivers/regulator/fan53555.c -------------------------
index 5808435..fb19fae 100644
@@ -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, "fairchild,suspend-voltage-selector",
+ &tmp);
+ if (!ret)
+ pdata->sleep_vsel_id = tmp;
+
+ return pdata;
+}
+
+static const struct of_device_id fan53555_dt_ids[] = {
+ {
+ .compatible = "fairchild,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 (!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->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,