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authorLee Jones <lee.jones@linaro.org>2015-07-06 11:58:29 +0300
committerMark Brown <broonie@kernel.org>2015-07-07 16:27:55 +0300
commitf9178dad67952673b653315f92620b7a981466e5 (patch)
tree3d0ed0a22649c7d2da0d3fdd3dd7c469b381b017 /drivers/regulator/pwm-regulator.c
parentd770e558e21961ad6cfdf0ff7df0eb5d7d4f0754 (diff)
downloadlinux-f9178dad67952673b653315f92620b7a981466e5.tar.xz
regulator: pwm-regulator: Separate voltage-table initialisation
Take this out of the main .probe() routine in order to facilitate the introduction of different ways to obtain 'duty cycle' information. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/pwm-regulator.c')
-rw-r--r--drivers/regulator/pwm-regulator.c77
1 files changed, 45 insertions, 32 deletions
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index ffa96124a5e7..25560fc519b7 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -78,8 +78,7 @@ static int pwm_regulator_list_voltage(struct regulator_dev *rdev,
return drvdata->duty_cycle_table[selector].uV;
}
-
-static struct regulator_ops pwm_regulator_voltage_ops = {
+static struct regulator_ops pwm_regulator_voltage_table_ops = {
.set_voltage_sel = pwm_regulator_set_voltage_sel,
.get_voltage_sel = pwm_regulator_get_voltage_sel,
.list_voltage = pwm_regulator_list_voltage,
@@ -88,20 +87,55 @@ static struct regulator_ops pwm_regulator_voltage_ops = {
static struct regulator_desc pwm_regulator_desc = {
.name = "pwm-regulator",
- .ops = &pwm_regulator_voltage_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.supply_name = "pwm",
};
+static int pwm_regulator_init_table(struct platform_device *pdev,
+ struct pwm_regulator_data *drvdata)
+{
+ struct device_node *np = pdev->dev.of_node;
+ struct pwm_voltages *duty_cycle_table;
+ int length;
+ int ret;
+
+ of_find_property(np, "voltage-table", &length);
+
+ if ((length < sizeof(*duty_cycle_table)) ||
+ (length % sizeof(*duty_cycle_table))) {
+ dev_err(&pdev->dev,
+ "voltage-table length(%d) is invalid\n",
+ length);
+ return -EINVAL;
+ }
+
+ duty_cycle_table = devm_kzalloc(&pdev->dev, length, GFP_KERNEL);
+ if (!duty_cycle_table)
+ return -ENOMEM;
+
+ ret = of_property_read_u32_array(np, "voltage-table",
+ (u32 *)duty_cycle_table,
+ length / sizeof(u32));
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to read voltage-table\n");
+ return ret;
+ }
+
+ drvdata->duty_cycle_table = duty_cycle_table;
+ pwm_regulator_desc.ops = &pwm_regulator_voltage_table_ops;
+ pwm_regulator_desc.n_voltages = length / sizeof(*duty_cycle_table);
+
+ return 0;
+}
+
static int pwm_regulator_probe(struct platform_device *pdev)
{
struct pwm_regulator_data *drvdata;
- struct property *prop;
struct regulator_dev *regulator;
struct regulator_config config = { };
struct device_node *np = pdev->dev.of_node;
- int length, ret;
+ int ret;
if (!np) {
dev_err(&pdev->dev, "Device Tree node missing\n");
@@ -112,36 +146,15 @@ static int pwm_regulator_probe(struct platform_device *pdev)
if (!drvdata)
return -ENOMEM;
- /* determine the number of voltage-table */
- prop = of_find_property(np, "voltage-table", &length);
- if (!prop) {
- dev_err(&pdev->dev, "No voltage-table\n");
- return -EINVAL;
- }
-
- if ((length < sizeof(*drvdata->duty_cycle_table)) ||
- (length % sizeof(*drvdata->duty_cycle_table))) {
- dev_err(&pdev->dev, "voltage-table length(%d) is invalid\n",
- length);
+ if (of_find_property(np, "voltage-table", NULL)) {
+ ret = pwm_regulator_init_table(pdev, drvdata);
+ if (ret)
+ return ret;
+ } else {
+ dev_err(&pdev->dev, "No \"voltage-table\" supplied\n");
return -EINVAL;
}
- pwm_regulator_desc.n_voltages = length / sizeof(*drvdata->duty_cycle_table);
-
- drvdata->duty_cycle_table = devm_kzalloc(&pdev->dev,
- length, GFP_KERNEL);
- if (!drvdata->duty_cycle_table)
- return -ENOMEM;
-
- /* read voltage table from DT property */
- ret = of_property_read_u32_array(np, "voltage-table",
- (u32 *)drvdata->duty_cycle_table,
- length / sizeof(u32));
- if (ret < 0) {
- dev_err(&pdev->dev, "read voltage-table failed\n");
- return ret;
- }
-
config.init_data = of_get_regulator_init_data(&pdev->dev, np,
&pwm_regulator_desc);
if (!config.init_data)