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regulator: richtek,rt4801: parse GPIOs per regulator

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Having one enable-gpios property for all regulators is discouraged and
instead, similarly to regulator core ena_gpiod feature, each GPIO should
be present in each regulator node.  Add support for parsing such GPIOs,
keeping backwards compatibility.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: ChiYuan Huang <cy_huang@richtek.com>
Link: https://lore.kernel.org/r/20220425072455.27356-3-krzysztof.kozlowski@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Krzysztof Kozlowski 2022-04-25 09:24:55 +02:00 committed by Mark Brown
parent a498db69dc
commit 6963569103
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 38 additions and 11 deletions
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49
drivers/regulator/rt4801-regulator.c
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@ -29,11 +29,33 @@
struct rt4801_priv {
struct device *dev;
struct gpio_descs *enable_gpios;
struct gpio_desc *enable_gpios[DSV_OUT_MAX];
unsigned int enable_flag;
unsigned int volt_sel[DSV_OUT_MAX];
};
static int rt4801_of_parse_cb(struct device_node *np,
const struct regulator_desc *desc,
struct regulator_config *config)
{
struct rt4801_priv *priv = config->driver_data;
int id = desc->id;
if (priv->enable_gpios[id]) {
dev_warn(priv->dev, "duplicated enable-gpios property\n");
return 0;
}
priv->enable_gpios[id] = devm_fwnode_gpiod_get_index(priv->dev,
of_fwnode_handle(np),
"enable", 0,
GPIOD_OUT_HIGH,
"rt4801");
if (IS_ERR(priv->enable_gpios[id]))
priv->enable_gpios[id] = NULL;
return 0;
}
static int rt4801_set_voltage_sel(struct regulator_dev *rdev, unsigned int selector)
{
struct rt4801_priv *priv = rdev_get_drvdata(rdev);
@ -63,15 +85,14 @@ static int rt4801_get_voltage_sel(struct regulator_dev *rdev)
static int rt4801_enable(struct regulator_dev *rdev)
{
struct rt4801_priv *priv = rdev_get_drvdata(rdev);
struct gpio_descs *gpios = priv->enable_gpios;
int id = rdev_get_id(rdev), ret;
if (!gpios || gpios->ndescs <= id) {
if (!priv->enable_gpios[id]) {
dev_warn(&rdev->dev, "no dedicated gpio can control\n");
goto bypass_gpio;
}
gpiod_set_value(gpios->desc[id], 1);
gpiod_set_value(priv->enable_gpios[id], 1);
bypass_gpio:
ret = regmap_write(rdev->regmap, rdev->desc->vsel_reg, priv->volt_sel[id]);
@ -85,15 +106,14 @@ bypass_gpio:
static int rt4801_disable(struct regulator_dev *rdev)
{
struct rt4801_priv *priv = rdev_get_drvdata(rdev);
struct gpio_descs *gpios = priv->enable_gpios;
int id = rdev_get_id(rdev);
if (!gpios || gpios->ndescs <= id) {
if (!priv->enable_gpios[id]) {
dev_warn(&rdev->dev, "no dedicated gpio can control\n");
goto bypass_gpio;
}
gpiod_set_value(gpios->desc[id], 0);
gpiod_set_value(priv->enable_gpios[id], 0);
bypass_gpio:
priv->enable_flag &= ~BIT(id);
@ -122,6 +142,7 @@ static const struct regulator_desc rt4801_regulator_descs[] = {
.name = "DSVP",
.ops = &rt4801_regulator_ops,
.of_match = of_match_ptr("DSVP"),
.of_parse_cb = rt4801_of_parse_cb,
.type = REGULATOR_VOLTAGE,
.id = DSV_OUT_POS,
.min_uV = MIN_UV,
@ -135,6 +156,7 @@ static const struct regulator_desc rt4801_regulator_descs[] = {
.name = "DSVN",
.ops = &rt4801_regulator_ops,
.of_match = of_match_ptr("DSVN"),
.of_parse_cb = rt4801_of_parse_cb,
.type = REGULATOR_VOLTAGE,
.id = DSV_OUT_NEG,
.min_uV = MIN_UV,
@ -172,10 +194,15 @@ static int rt4801_probe(struct i2c_client *i2c)
return PTR_ERR(regmap);
}
priv->enable_gpios = devm_gpiod_get_array_optional(&i2c->dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(priv->enable_gpios)) {
dev_err(&i2c->dev, "Failed to get gpios\n");
return PTR_ERR(priv->enable_gpios);
for (i = 0; i < DSV_OUT_MAX; i++) {
priv->enable_gpios[i] = devm_gpiod_get_index_optional(&i2c->dev,
"enable",
i,
GPIOD_OUT_HIGH);
if (IS_ERR(priv->enable_gpios[i])) {
dev_err(&i2c->dev, "Failed to get gpios\n");
return PTR_ERR(priv->enable_gpios[i]);
}
}
for (i = 0; i < DSV_OUT_MAX; i++) {