Commit ae47ee5f authored by Christian Hemp's avatar Christian Hemp Committed by Mauro Carvalho Chehab
Browse files

media: mt9p031: Make pixel clock polarity configurable by DT 



Evaluate the desired pixel clock polarity from the device tree.

Signed-off-by: default avatarChristian Hemp <c.hemp@phytec.de>
Signed-off-by: default avatarStefan Riedmueller <s.riedmueller@phytec.de>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent b9c18096

drivers/media/i2c/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -1229,6 +1229,7 @@ config VIDEO_MT9P031 
	select MEDIA_CONTROLLER

	select VIDEO_V4L2_SUBDEV_API

	select VIDEO_APTINA_PLL

	select V4L2_FWNODE

	help

	  This is a Video4Linux2 sensor driver for the Aptina

	  (Micron) mt9p031 5 Mpixel camera.

drivers/media/i2c/mt9p031.c

+19 −1
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <media/v4l2-async.h>

#include <media/v4l2-ctrls.h>

#include <media/v4l2-device.h>

#include <media/v4l2-fwnode.h>

#include <media/v4l2-subdev.h>



#include "aptina-pll.h"
@@ -372,6 +373,14 @@ static int __mt9p031_set_power(struct mt9p031 *mt9p031, bool on) 
		return ret;

	}



	/* Configure the pixel clock polarity */

	if (mt9p031->pdata && mt9p031->pdata->pixclk_pol) {

		ret = mt9p031_write(client, MT9P031_PIXEL_CLOCK_CONTROL,

				MT9P031_PIXEL_CLOCK_INVERT);

		if (ret < 0)

			return ret;

	}



	return v4l2_ctrl_handler_setup(&mt9p031->ctrls);

}
@@ -1014,8 +1023,11 @@ static const struct v4l2_subdev_internal_ops mt9p031_subdev_internal_ops = { 
static struct mt9p031_platform_data *

mt9p031_get_pdata(struct i2c_client *client)

{

	struct mt9p031_platform_data *pdata;

	struct mt9p031_platform_data *pdata = NULL;

	struct device_node *np;

	struct v4l2_fwnode_endpoint endpoint = {

		.bus_type = V4L2_MBUS_PARALLEL

	};



	if (!IS_ENABLED(CONFIG_OF) || !client->dev.of_node)

		return client->dev.platform_data;
@@ -1024,6 +1036,9 @@ mt9p031_get_pdata(struct i2c_client *client) 
	if (!np)

		return NULL;



	if (v4l2_fwnode_endpoint_parse(of_fwnode_handle(np), &endpoint) < 0)

		goto done;



	pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)

		goto done;
@@ -1031,6 +1046,9 @@ mt9p031_get_pdata(struct i2c_client *client) 
	of_property_read_u32(np, "input-clock-frequency", &pdata->ext_freq);

	of_property_read_u32(np, "pixel-clock-frequency", &pdata->target_freq);



	pdata->pixclk_pol = !!(endpoint.bus.parallel.flags &

			       V4L2_MBUS_PCLK_SAMPLE_RISING);



done:

	of_node_put(np);

	return pdata;

include/media/i2c/mt9p031.h

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ struct v4l2_subdev; 
 * @target_freq: Pixel clock frequency

 */

struct mt9p031_platform_data {

	unsigned int pixclk_pol:1;

	int ext_freq;

	int target_freq;

};