linux-kernel - [PATCH v3 4/5] iio: imu: inv_icm42600: Use devm_regulator_get

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Message-Id: <20250901-icm42pmreg-v3-4-ef1336246960@geanix.com>
Date: Mon, 01 Sep 2025 09:49:16 +0200
From: Sean Nyekjaer <sean@...nix.com>
To: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@....com>, 
 rafael@...nel.org, Jonathan Cameron <jic23@...nel.org>, 
 David Lechner <dlechner@...libre.com>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>
Cc: linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, Jean-Baptiste Maneyrol <jmaneyrol@...ensense.com>, 
 Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 Sean Nyekjaer <sean@...nix.com>
Subject: [PATCH v3 4/5] iio: imu: inv_icm42600: Use
 devm_regulator_get_enable() for vdd regulator

The vdd regulator is not used for runtime power management, so it does
not need explicit enable/disable handling.
Use devm_regulator_get_enable() to let the regulator be managed
automatically by devm.

This simplifies the code by removing the manual enable and cleanup
logic.

Signed-off-by: Sean Nyekjaer <sean@...nix.com>
---
 drivers/iio/imu/inv_icm42600/inv_icm42600.h      |  1 -
 drivers/iio/imu/inv_icm42600/inv_icm42600_core.c | 29 +++++-------------------
 2 files changed, 6 insertions(+), 24 deletions(-)

diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
index 1430ab4f1dea5d5ba6277d74275fc44a6cd30eb8..c8b48a5c5ed0677bb35201d32934936faaf7a1a6 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
@@ -167,7 +167,6 @@ struct inv_icm42600_state {
 	enum inv_icm42600_chip chip;
 	const char *name;
 	struct regmap *map;
-	struct regulator *vdd_supply;
 	struct regulator *vddio_supply;
 	int irq;
 	struct iio_mount_matrix orientation;
diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
index ee780f530dc8612cd25dc2216b153ef4e8c32b7b..4bf436c46f1cfd7e7e1bb911d94a0a566d63e791 100644
--- a/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
+++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_core.c
@@ -697,17 +697,6 @@ static int inv_icm42600_enable_regulator_vddio(struct inv_icm42600_state *st)
 	return 0;
 }
 
-static void inv_icm42600_disable_vdd_reg(void *_data)
-{
-	struct inv_icm42600_state *st = _data;
-	const struct device *dev = regmap_get_device(st->map);
-	int ret;
-
-	ret = regulator_disable(st->vdd_supply);
-	if (ret)
-		dev_err(dev, "failed to disable vdd error %d\n", ret);
-}
-
 static void inv_icm42600_disable_vddio_reg(void *_data)
 {
 	struct inv_icm42600_state *st = _data;
@@ -765,23 +754,17 @@ int inv_icm42600_core_probe(struct regmap *regmap, int chip,
 		return ret;
 	}
 
-	st->vdd_supply = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(st->vdd_supply))
-		return PTR_ERR(st->vdd_supply);
+	ret = devm_regulator_get_enable(dev, "vdd");
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "Failed to get vdd regulator\n");
+
+	msleep(INV_ICM42600_POWER_UP_TIME_MS);
 
 	st->vddio_supply = devm_regulator_get(dev, "vddio");
 	if (IS_ERR(st->vddio_supply))
 		return PTR_ERR(st->vddio_supply);
 
-	ret = regulator_enable(st->vdd_supply);
-	if (ret)
-		return ret;
-	msleep(INV_ICM42600_POWER_UP_TIME_MS);
-
-	ret = devm_add_action_or_reset(dev, inv_icm42600_disable_vdd_reg, st);
-	if (ret)
-		return ret;
-
 	ret = inv_icm42600_enable_regulator_vddio(st);
 	if (ret)
 		return ret;

-- 
2.50.1