diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/media/i2c/uda1342.c | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/media/i2c/uda1342.c')
-rw-r--r-- | kernel/drivers/media/i2c/uda1342.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/kernel/drivers/media/i2c/uda1342.c b/kernel/drivers/media/i2c/uda1342.c new file mode 100644 index 000000000..081786d17 --- /dev/null +++ b/kernel/drivers/media/i2c/uda1342.c @@ -0,0 +1,112 @@ +/* + * Copyright (C) 2005-2006 Micronas USA Inc. + * + * 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/v4l2-device.h> +#include <media/uda1342.h> +#include <linux/slab.h> + +static int write_reg(struct i2c_client *client, int reg, int value) +{ + /* UDA1342 wants MSB first, but SMBus sends LSB first */ + i2c_smbus_write_word_data(client, reg, swab16(value)); + return 0; +} + +static int uda1342_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + struct i2c_client *client = v4l2_get_subdevdata(sd); + + switch (input) { + case UDA1342_IN1: + write_reg(client, 0x00, 0x1241); /* select input 1 */ + break; + case UDA1342_IN2: + write_reg(client, 0x00, 0x1441); /* select input 2 */ + break; + default: + v4l2_err(sd, "input %d not supported\n", input); + break; + } + return 0; +} + +static const struct v4l2_subdev_audio_ops uda1342_audio_ops = { + .s_routing = uda1342_s_routing, +}; + +static const struct v4l2_subdev_ops uda1342_ops = { + .audio = &uda1342_audio_ops, +}; + +static int uda1342_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_adapter *adapter = client->adapter; + struct v4l2_subdev *sd; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return -ENODEV; + + dev_dbg(&client->dev, "initializing UDA1342 at address %d on %s\n", + client->addr, adapter->name); + + sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL); + if (sd == NULL) + return -ENOMEM; + + v4l2_i2c_subdev_init(sd, client, &uda1342_ops); + + write_reg(client, 0x00, 0x8000); /* reset registers */ + write_reg(client, 0x00, 0x1241); /* select input 1 */ + + v4l_info(client, "chip found @ 0x%02x (%s)\n", + client->addr << 1, client->adapter->name); + + return 0; +} + +static int uda1342_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + + v4l2_device_unregister_subdev(sd); + return 0; +} + +static const struct i2c_device_id uda1342_id[] = { + { "uda1342", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, uda1342_id); + +static struct i2c_driver uda1342_driver = { + .driver = { + .name = "uda1342", + }, + .probe = uda1342_probe, + .remove = uda1342_remove, + .id_table = uda1342_id, +}; + +module_i2c_driver(uda1342_driver); + +MODULE_LICENSE("GPL v2"); |