From: Hans Verkuil <hans.verkuil@xxxxxxxxx> Get the clock for this sensor. Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> --- drivers/media/i2c/ov7670.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/media/i2c/ov7670.c b/drivers/media/i2c/ov7670.c index 50e4466..da08436 100644 --- a/drivers/media/i2c/ov7670.c +++ b/drivers/media/i2c/ov7670.c @@ -10,6 +10,7 @@ * This file may be distributed under the terms of the GNU General * Public License, version 2. */ +#include <linux/clk.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> @@ -227,6 +228,7 @@ struct ov7670_info { struct v4l2_ctrl *hue; }; struct ov7670_format_struct *fmt; /* Current format */ + struct clk *clk; int min_width; /* Filter out smaller sizes */ int min_height; /* Filter out smaller sizes */ int clock_speed; /* External clock speed (MHz) */ @@ -1587,6 +1589,15 @@ static int ov7670_probe(struct i2c_client *client, info->pclk_hb_disable = true; } + info->clk = devm_clk_get(&client->dev, "xclk"); + if (IS_ERR(info->clk)) + return -EPROBE_DEFER; + clk_prepare_enable(info->clk); + + info->clock_speed = clk_get_rate(info->clk) / 1000000; + if (info->clock_speed < 10 || info->clock_speed > 48) + return -EINVAL; + /* Make sure it's an ov7670 */ ret = ov7670_detect(sd); if (ret) { @@ -1667,6 +1678,7 @@ static int ov7670_remove(struct i2c_client *client) v4l2_device_unregister_subdev(sd); v4l2_ctrl_handler_free(&info->hdl); + clk_disable_unprepare(info->clk); return 0; } -- 2.10.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html