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ed5c2f5fd1
The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com> Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Crt Mori <cmo@melexis.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/* Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5 Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860 Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2005-2006 Micronas USA Inc.
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/i2c/uda1342.h>
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#include <linux/slab.h>
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static int write_reg(struct i2c_client *client, int reg, int value)
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{
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/* UDA1342 wants MSB first, but SMBus sends LSB first */
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i2c_smbus_write_word_data(client, reg, swab16(value));
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return 0;
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}
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static int uda1342_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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switch (input) {
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case UDA1342_IN1:
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write_reg(client, 0x00, 0x1241); /* select input 1 */
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break;
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case UDA1342_IN2:
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write_reg(client, 0x00, 0x1441); /* select input 2 */
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break;
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default:
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v4l2_err(sd, "input %d not supported\n", input);
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break;
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}
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return 0;
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}
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static const struct v4l2_subdev_audio_ops uda1342_audio_ops = {
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.s_routing = uda1342_s_routing,
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};
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static const struct v4l2_subdev_ops uda1342_ops = {
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.audio = &uda1342_audio_ops,
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};
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static int uda1342_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct i2c_adapter *adapter = client->adapter;
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struct v4l2_subdev *sd;
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if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA))
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return -ENODEV;
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dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n",
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client->addr, adapter->name);
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sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL);
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if (sd == NULL)
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return -ENOMEM;
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v4l2_i2c_subdev_init(sd, client, &uda1342_ops);
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write_reg(client, 0x00, 0x8000); /* reset registers */
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write_reg(client, 0x00, 0x1241); /* select input 1 */
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v4l_info(client, "chip found @ 0x%02x (%s)\n",
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client->addr << 1, client->adapter->name);
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return 0;
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}
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static void uda1342_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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v4l2_device_unregister_subdev(sd);
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}
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static const struct i2c_device_id uda1342_id[] = {
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{ "uda1342", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, uda1342_id);
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static struct i2c_driver uda1342_driver = {
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.driver = {
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.name = "uda1342",
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},
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.probe = uda1342_probe,
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.remove = uda1342_remove,
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.id_table = uda1342_id,
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};
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module_i2c_driver(uda1342_driver);
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MODULE_LICENSE("GPL v2");
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