summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/isl6271a-regulator.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/regulator/isl6271a-regulator.c')
-rw-r--r--drivers/regulator/isl6271a-regulator.c73
1 files changed, 25 insertions, 48 deletions
diff --git a/drivers/regulator/isl6271a-regulator.c b/drivers/regulator/isl6271a-regulator.c
index 775f5fd208c..56d273f2560 100644
--- a/drivers/regulator/isl6271a-regulator.c
+++ b/drivers/regulator/isl6271a-regulator.c
@@ -22,7 +22,6 @@
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/i2c.h>
-#include <linux/delay.h>
#include <linux/slab.h>
#define ISL6271A_VOLTAGE_MIN 850000
@@ -36,47 +35,30 @@ struct isl_pmic {
struct mutex mtx;
};
-static int isl6271a_get_voltage(struct regulator_dev *dev)
+static int isl6271a_get_voltage_sel(struct regulator_dev *dev)
{
struct isl_pmic *pmic = rdev_get_drvdata(dev);
- int idx, data;
+ int idx;
mutex_lock(&pmic->mtx);
idx = i2c_smbus_read_byte(pmic->client);
- if (idx < 0) {
+ if (idx < 0)
dev_err(&pmic->client->dev, "Error getting voltage\n");
- data = idx;
- goto out;
- }
-
- /* Convert the data from chip to microvolts */
- data = ISL6271A_VOLTAGE_MIN + (ISL6271A_VOLTAGE_STEP * (idx & 0xf));
-out:
mutex_unlock(&pmic->mtx);
- return data;
+ return idx;
}
-static int isl6271a_set_voltage(struct regulator_dev *dev,
- int minuV, int maxuV,
- unsigned *selector)
+static int isl6271a_set_voltage_sel(struct regulator_dev *dev,
+ unsigned selector)
{
struct isl_pmic *pmic = rdev_get_drvdata(dev);
- int err, data;
-
- if (minuV < ISL6271A_VOLTAGE_MIN || minuV > ISL6271A_VOLTAGE_MAX)
- return -EINVAL;
- if (maxuV < ISL6271A_VOLTAGE_MIN || maxuV > ISL6271A_VOLTAGE_MAX)
- return -EINVAL;
-
- data = DIV_ROUND_UP(minuV - ISL6271A_VOLTAGE_MIN,
- ISL6271A_VOLTAGE_STEP);
- *selector = data;
+ int err;
mutex_lock(&pmic->mtx);
- err = i2c_smbus_write_byte(pmic->client, data);
+ err = i2c_smbus_write_byte(pmic->client, selector);
if (err < 0)
dev_err(&pmic->client->dev, "Error setting voltage\n");
@@ -84,15 +66,11 @@ static int isl6271a_set_voltage(struct regulator_dev *dev,
return err;
}
-static int isl6271a_list_voltage(struct regulator_dev *dev, unsigned selector)
-{
- return ISL6271A_VOLTAGE_MIN + (ISL6271A_VOLTAGE_STEP * selector);
-}
-
static struct regulator_ops isl_core_ops = {
- .get_voltage = isl6271a_get_voltage,
- .set_voltage = isl6271a_set_voltage,
- .list_voltage = isl6271a_list_voltage,
+ .get_voltage_sel = isl6271a_get_voltage_sel,
+ .set_voltage_sel = isl6271a_set_voltage_sel,
+ .list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
};
static int isl6271a_get_fixed_voltage(struct regulator_dev *dev)
@@ -112,7 +90,7 @@ static struct regulator_ops isl_fixed_ops = {
.list_voltage = isl6271a_list_fixed_voltage,
};
-static struct regulator_desc isl_rd[] = {
+static const struct regulator_desc isl_rd[] = {
{
.name = "Core Buck",
.id = 0,
@@ -120,6 +98,8 @@ static struct regulator_desc isl_rd[] = {
.ops = &isl_core_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
+ .min_uV = ISL6271A_VOLTAGE_MIN,
+ .uV_step = ISL6271A_VOLTAGE_STEP,
}, {
.name = "LDO1",
.id = 1,
@@ -140,6 +120,7 @@ static struct regulator_desc isl_rd[] = {
static int __devinit isl6271a_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
+ struct regulator_config config = { };
struct regulator_init_data *init_data = i2c->dev.platform_data;
struct isl_pmic *pmic;
int err, i;
@@ -147,12 +128,7 @@ static int __devinit isl6271a_probe(struct i2c_client *i2c,
if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
- if (!init_data) {
- dev_err(&i2c->dev, "no platform data supplied\n");
- return -EIO;
- }
-
- pmic = kzalloc(sizeof(struct isl_pmic), GFP_KERNEL);
+ pmic = devm_kzalloc(&i2c->dev, sizeof(struct isl_pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
@@ -161,8 +137,14 @@ static int __devinit isl6271a_probe(struct i2c_client *i2c,
mutex_init(&pmic->mtx);
for (i = 0; i < 3; i++) {
- pmic->rdev[i] = regulator_register(&isl_rd[i], &i2c->dev,
- init_data, pmic, NULL);
+ config.dev = &i2c->dev;
+ if (i == 0)
+ config.init_data = init_data;
+ else
+ config.init_data = 0;
+ config.driver_data = pmic;
+
+ pmic->rdev[i] = regulator_register(&isl_rd[i], &config);
if (IS_ERR(pmic->rdev[i])) {
dev_err(&i2c->dev, "failed to register %s\n", id->name);
err = PTR_ERR(pmic->rdev[i]);
@@ -177,8 +159,6 @@ static int __devinit isl6271a_probe(struct i2c_client *i2c,
error:
while (--i >= 0)
regulator_unregister(pmic->rdev[i]);
-
- kfree(pmic);
return err;
}
@@ -189,9 +169,6 @@ static int __devexit isl6271a_remove(struct i2c_client *i2c)
for (i = 0; i < 3; i++)
regulator_unregister(pmic->rdev[i]);
-
- kfree(pmic);
-
return 0;
}