linux-kernel - [PATCH v4 3/8] drm/bridge: ti-sn65dsi86: use the auxiliary device

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Message-Id: <20250218-aux-device-create-helper-v4-3-c3d7dfdea2e6@baylibre.com>
Date: Tue, 18 Feb 2025 20:29:48 +0100
From: Jerome Brunet <jbrunet@...libre.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Dave Ertman <david.m.ertman@...el.com>, Ira Weiny <ira.weiny@...el.com>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Stephen Boyd <sboyd@...nel.org>, 
 Arnd Bergmann <arnd@...db.de>, Danilo Krummrich <dakr@...nel.org>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Daire McNamara <daire.mcnamara@...rochip.com>, 
 Philipp Zabel <p.zabel@...gutronix.de>, 
 Douglas Anderson <dianders@...omium.org>, 
 Andrzej Hajda <andrzej.hajda@...el.com>, 
 Neil Armstrong <neil.armstrong@...aro.org>, Robert Foss <rfoss@...nel.org>, 
 Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
 Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Hans de Goede <hdegoede@...hat.com>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Vladimir Kondratiev <vladimir.kondratiev@...ileye.com>, 
 Gregory CLEMENT <gregory.clement@...tlin.com>, 
 Théo Lebrun <theo.lebrun@...tlin.com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Kevin Hilman <khilman@...libre.com>, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc: linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
 dri-devel@...ts.freedesktop.org, platform-driver-x86@...r.kernel.org, 
 linux-mips@...r.kernel.org, linux-clk@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-amlogic@...ts.infradead.org, 
 Jerome Brunet <jbrunet@...libre.com>
Subject: [PATCH v4 3/8] drm/bridge: ti-sn65dsi86: use the auxiliary device

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>
---
 drivers/gpu/drm/bridge/ti-sn65dsi86.c | 49 +++++------------------------------
 1 file changed, 7 insertions(+), 42 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 205bd0fde4f8b3400caa8507092308e50eb172b7..38bd18b14887a27a716c8798f6284649c77a761b 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -457,23 +457,6 @@ static void ti_sn65dsi86_debugfs_init(struct ti_sn65dsi86 *pdata)
  * Auxiliary Devices (*not* AUX)
  */

-static void ti_sn65dsi86_uninit_aux(void *data)
-{
-	auxiliary_device_uninit(data);
-}
-
-static void ti_sn65dsi86_delete_aux(void *data)
-{
-	auxiliary_device_delete(data);
-}
-
-static void ti_sn65dsi86_aux_device_release(struct device *dev)
-{
-	struct auxiliary_device *aux = container_of(dev, struct auxiliary_device, dev);
-
-	kfree(aux);
-}
-
 static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata,
 				       struct auxiliary_device **aux_out,
 				       const char *name)
@@ -481,34 +464,16 @@ static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata,
 	struct device *dev = pdata->dev;
 	const struct i2c_client *client = to_i2c_client(dev);
 	struct auxiliary_device *aux;
-	int ret;
+	int id;

-	aux = kzalloc(sizeof(*aux), GFP_KERNEL);
+	id = (client->adapter->nr << 10) | client->addr;
+	aux = __devm_auxiliary_device_create(dev, KBUILD_MODNAME, name,
+					     NULL, id);
 	if (!aux)
-		return -ENOMEM;
-
-	aux->name = name;
-	aux->id = (client->adapter->nr << 10) | client->addr;
-	aux->dev.parent = dev;
-	aux->dev.release = ti_sn65dsi86_aux_device_release;
-	device_set_of_node_from_dev(&aux->dev, dev);
-	ret = auxiliary_device_init(aux);
-	if (ret) {
-		kfree(aux);
-		return ret;
-	}
-	ret = devm_add_action_or_reset(dev, ti_sn65dsi86_uninit_aux, aux);
-	if (ret)
-		return ret;
-
-	ret = auxiliary_device_add(aux);
-	if (ret)
-		return ret;
-	ret = devm_add_action_or_reset(dev, ti_sn65dsi86_delete_aux, aux);
-	if (!ret)
-		*aux_out = aux;
+		return -ENODEV;

-	return ret;
+	*aux_out = aux;
+	return 0;
 }

 /* -----------------------------------------------------------------------------

-- 
2.47.2