1802d0beec
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 655 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070034.575739538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
101 lines
2.3 KiB
C
101 lines
2.3 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 int 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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return 0;
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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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