linux-kernel - [PATCH] platform: arm64: lenovo-yoga-c630: use the auxiliary device creation helper

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Message-Id: <20250610-yoga-aux-v1-1-d6115aa1683c@baylibre.com>
Date: Tue, 10 Jun 2025 10:41:07 +0200
From: Jerome Brunet <jbrunet@...libre.com>
To: Hans de Goede <hdegoede@...hat.com>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH] platform: arm64: lenovo-yoga-c630: use the auxiliary
 device creation helper

The auxiliary device creation of this driver is simple enough to
use the available auxiliary device creation helper.

Use it and remove some boilerplate code.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
This is essentially a resend of this change [1] which was sent a few months
ago. The necessary auxiliary bus support has now been merged with
v6.16-rc1, so this change should be safe to apply.

[1]: https://lore.kernel.org/r/20250218-aux-device-create-helper-v4-4-c3d7dfdea2e6@baylibre.com
---
 drivers/platform/arm64/lenovo-yoga-c630.c | 40 +++----------------------------
 1 file changed, 3 insertions(+), 37 deletions(-)

diff --git a/drivers/platform/arm64/lenovo-yoga-c630.c b/drivers/platform/arm64/lenovo-yoga-c630.c
index 1f05c9a6a89d5ee146144062f5d2e36795c56639..75060c842b249c1b4cab21fef943266ae0b31d32 100644
--- a/drivers/platform/arm64/lenovo-yoga-c630.c
+++ b/drivers/platform/arm64/lenovo-yoga-c630.c
@@ -191,50 +191,16 @@ void yoga_c630_ec_unregister_notify(struct yoga_c630_ec *ec, struct notifier_blo
 }
 EXPORT_SYMBOL_GPL(yoga_c630_ec_unregister_notify);
 
-static void yoga_c630_aux_release(struct device *dev)
-{
-	struct auxiliary_device *adev = to_auxiliary_dev(dev);
-
-	kfree(adev);
-}
-
-static void yoga_c630_aux_remove(void *data)
-{
-	struct auxiliary_device *adev = data;
-
-	auxiliary_device_delete(adev);
-	auxiliary_device_uninit(adev);
-}
-
 static int yoga_c630_aux_init(struct device *parent, const char *name,
 			      struct yoga_c630_ec *ec)
 {
 	struct auxiliary_device *adev;
-	int ret;
 
-	adev = kzalloc(sizeof(*adev), GFP_KERNEL);
+	adev = devm_auxiliary_device_create(parent, name, ec);
 	if (!adev)
-		return -ENOMEM;
-
-	adev->name = name;
-	adev->id = 0;
-	adev->dev.parent = parent;
-	adev->dev.release = yoga_c630_aux_release;
-	adev->dev.platform_data = ec;
-
-	ret = auxiliary_device_init(adev);
-	if (ret) {
-		kfree(adev);
-		return ret;
-	}
-
-	ret = auxiliary_device_add(adev);
-	if (ret) {
-		auxiliary_device_uninit(adev);
-		return ret;
-	}
+		return -ENODEV;
 
-	return devm_add_action_or_reset(parent, yoga_c630_aux_remove, adev);
+	return 0;
 }
 
 static int yoga_c630_ec_probe(struct i2c_client *client)

---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250610-yoga-aux-30715036a8f4

Best regards,
-- 
Jerome