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

From: David Lechner <dlechner@baylibre.com>
To: Jonathan Corbet <corbet@lwn.net>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>, Jean Delvare <jdelvare@suse.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Support Opensource <support.opensource@diasemi.com>,
	Cosmin Tanislav <cosmin.tanislav@analog.com>,
	Lars-Peter Clausen <lars@metafoo.de>,
	Michael Hennerich <Michael.Hennerich@analog.com>,
	Jonathan Cameron <jic23@kernel.org>,
	Antoniu Miclaus <antoniu.miclaus@analog.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: David Lechner <dlechner@baylibre.com>,
	linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-hwmon@vger.kernel.org, linux-iio@vger.kernel.org,
	linux-staging@lists.linux.dev, linux-input@vger.kernel.org
Subject: [PATCH RFC 7/7] Input: mpr121: Use devm_regulator_get_enable_get_voltage()
Date: Wed, 27 Mar 2024 18:18:56 -0500	[thread overview]
Message-ID: <20240327-regulator-get-enable-get-votlage-v1-7-5f4517faa059@baylibre.com> (raw)
In-Reply-To: <20240327-regulator-get-enable-get-votlage-v1-0-5f4517faa059@baylibre.com>

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

