[PATCH RFC 7/7] Input: mpr121: Use devm_regulator_get_enable_get_voltage()

David Lechner
2024-03-27T23:19:11Z

We can reduce boilerplate code by using
devm_regulator_get_enable_get_voltage().

Signed-off-by: David Lechner <dlechner@baylibre.com>
---
drivers/input/keyboard/mpr121_touchkey.c | 45 +++-----------------------------
1 file changed, 3 insertions(+), 42 deletions(-)

diff --git a/drivers/input/keyboard/mpr121_touchkey.c b/drivers/input/keyboard/mpr121_touchkey.c
index d434753afab1..c59e7451f3cd 100644
--- a/drivers/input/keyboard/mpr121_touchkey.c
+++ b/drivers/input/keyboard/mpr121_touchkey.c
@@ -82,42 +82,6 @@ static const struct mpr121_init_register init_reg_table[] = {
{ AUTO_CONFIG_CTRL_ADDR, 0x0b },
};

-static void mpr121_vdd_supply_disable(void *data)
-{
- struct regulator *vdd_supply = data;
-
- regulator_disable(vdd_supply);
-}
-
-static struct regulator *mpr121_vdd_supply_init(struct device *dev)
-{
- struct regulator *vdd_supply;
- int err;
-
- vdd_supply = devm_regulator_get(dev, "vdd");
- if (IS_ERR(vdd_supply)) {
- dev_err(dev, "failed to get vdd regulator: %ld\n",
- PTR_ERR(vdd_supply));
- return vdd_supply;
- }
-
- err = regulator_enable(vdd_supply);
- if (err) {
- dev_err(dev, "failed to enable vdd regulator: %d\n", err);
- return ERR_PTR(err);
- }
-
- err = devm_add_action_or_reset(dev, mpr121_vdd_supply_disable,
- vdd_supply);
- if (err) {
- dev_err(dev, "failed to add disable regulator action: %d\n",
- err);
- return ERR_PTR(err);
- }
-
- return vdd_supply;
-}
-
static void mpr_touchkey_report(struct input_dev *dev)
{
struct mpr121_touchkey *mpr121 = input_get_drvdata(dev);
@@ -233,7 +197,6 @@ static int mpr121_phys_init(struct mpr121_touchkey *mpr121,
static int mpr_touchkey_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
- struct regulator *vdd_supply;
int vdd_uv;
struct mpr121_touchkey *mpr121;
struct input_dev *input_dev;
@@ -241,11 +204,9 @@ static int mpr_touchkey_probe(struct i2c_client *client)
int error;
int i;

- vdd_supply = mpr121_vdd_supply_init(dev);
- if (IS_ERR(vdd_supply))
- return PTR_ERR(vdd_supply);
-
- vdd_uv = regulator_get_voltage(vdd_supply);
+ vdd_uv = devm_regulator_get_enable_get_voltage(dev, "vdd");
+ if (vdd_uv < 0)
+ return vdd_uv;

mpr121 = devm_kzalloc(dev, sizeof(*mpr121), GFP_KERNEL);
if (!mpr121)

--
2.43.2