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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>
This commit is contained in:
Heiko Stuebner 2014-09-16 21:22:53 +02:00 committed by Mark Brown
parent ed801b4046
commit 91f23d8fb6
1 changed files with 46 additions and 4 deletions
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50
drivers/regulator/fan53555.c
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@ -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,