From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: 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 Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior 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 --- kernel/drivers/media/i2c/ov7640.c | 104 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 104 insertions(+) create mode 100644 kernel/drivers/media/i2c/ov7640.c (limited to 'kernel/drivers/media/i2c/ov7640.c') diff --git a/kernel/drivers/media/i2c/ov7640.c b/kernel/drivers/media/i2c/ov7640.c new file mode 100644 index 000000000..faa64baf0 --- /dev/null +++ b/kernel/drivers/media/i2c/ov7640.c @@ -0,0 +1,104 @@ +/* + * 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 +#include +#include +#include +#include +#include + +MODULE_DESCRIPTION("OmniVision ov7640 sensor driver"); +MODULE_LICENSE("GPL v2"); + +static const u8 initial_registers[] = { + 0x12, 0x80, + 0x12, 0x54, + 0x14, 0x24, + 0x15, 0x01, + 0x28, 0x20, + 0x75, 0x82, + 0xFF, 0xFF, /* Terminator (reg 0xFF is unused) */ +}; + +static int write_regs(struct i2c_client *client, const u8 *regs) +{ + int i; + + for (i = 0; regs[i] != 0xFF; i += 2) + if (i2c_smbus_write_byte_data(client, regs[i], regs[i + 1]) < 0) + return -1; + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_subdev_ops ov7640_ops; + +static int ov7640_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_BYTE_DATA)) + return -ENODEV; + + sd = devm_kzalloc(&client->dev, sizeof(*sd), GFP_KERNEL); + if (sd == NULL) + return -ENOMEM; + v4l2_i2c_subdev_init(sd, client, &ov7640_ops); + + client->flags = I2C_CLIENT_SCCB; + + v4l_info(client, "chip found @ 0x%02x (%s)\n", + client->addr << 1, client->adapter->name); + + if (write_regs(client, initial_registers) < 0) { + v4l_err(client, "error initializing OV7640\n"); + return -ENODEV; + } + + return 0; +} + + +static int ov7640_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 ov7640_id[] = { + { "ov7640", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ov7640_id); + +static struct i2c_driver ov7640_driver = { + .driver = { + .owner = THIS_MODULE, + .name = "ov7640", + }, + .probe = ov7640_probe, + .remove = ov7640_remove, + .id_table = ov7640_id, +}; +module_i2c_driver(ov7640_driver); -- cgit 1.2.3-korg