linux-kernel - [PATCH v2 7/7] Input: mpr121: Use devm_regulator_get_enable_read

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Message-ID: <20240429-regulator-get-enable-get-votlage-v2-7-b1f11ab766c1@baylibre.com>
Date: Mon, 29 Apr 2024 18:40:15 -0500
From: David Lechner <dlechner@...libre.com>
To: Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jean Delvare <jdelvare@...e.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Jonathan Cameron <jic23@...nel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: David Lechner <dlechner@...libre.com>,
	Jonathan Corbet <corbet@....net>,
	Support Opensource <support.opensource@...semi.com>,
	Cosmin Tanislav <cosmin.tanislav@...log.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Antoniu Miclaus <antoniu.miclaus@...log.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-hwmon@...r.kernel.org,
	linux-iio@...r.kernel.org,
	linux-staging@...ts.linux.dev,
	linux-input@...r.kernel.org,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: [PATCH v2 7/7] Input: mpr121: Use devm_regulator_get_enable_read_voltage()

We can reduce boilerplate code by using
devm_regulator_get_enable_read_voltage().

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
Signed-off-by: David Lechner <dlechner@...libre.com>
---

v2 changes:
* renamed to devm_regulator_get_enable_read_voltage()
* restored error message
---
 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..0ea3ab9b8bbb 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_read_voltage(dev, "vdd");
+	if (vdd_uv < 0)
+		return dev_err_probe(dev, vdd_uv, "failed to get vdd voltage\n");
 
 	mpr121 = devm_kzalloc(dev, sizeof(*mpr121), GFP_KERNEL);
 	if (!mpr121)

-- 
2.43.2