Commit 0abb8f90 authored by Eugen Hristev's avatar Eugen Hristev Committed by Mauro Carvalho Chehab
Browse files

media: i2c: imx274: implement fwnode parsing 



Implement fwnode parsing at probe time.
Check if the bus and number of lanes are supported.

Signed-off-by: default avatarEugen Hristev <eugen.hristev@microchip.com>
Signed-off-by: default avatarSakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab+huawei@kernel.org>
parent 57de5bb2

drivers/media/i2c/imx274.c

+40 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 


#include <media/v4l2-ctrls.h>

#include <media/v4l2-device.h>

#include <media/v4l2-fwnode.h>

#include <media/v4l2-subdev.h>



/*
@@ -1957,6 +1958,41 @@ static const struct i2c_device_id imx274_id[] = { 
};

MODULE_DEVICE_TABLE(i2c, imx274_id);



static int imx274_fwnode_parse(struct device *dev)

{

	struct fwnode_handle *endpoint;

	/* Only CSI2 is supported */

	struct v4l2_fwnode_endpoint ep = {

		.bus_type = V4L2_MBUS_CSI2_DPHY

	};

	int ret;



	endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL);

	if (!endpoint) {

		dev_err(dev, "Endpoint node not found\n");

		return -EINVAL;

	}



	ret = v4l2_fwnode_endpoint_parse(endpoint, &ep);

	fwnode_handle_put(endpoint);

	if (ret == -ENXIO) {

		dev_err(dev, "Unsupported bus type, should be CSI2\n");

		return ret;

	} else if (ret) {

		dev_err(dev, "Parsing endpoint node failed %d\n", ret);

		return ret;

	}



	/* Check number of data lanes, only 4 lanes supported */

	if (ep.bus.mipi_csi2.num_data_lanes != 4) {

		dev_err(dev, "Invalid data lanes: %d\n",

			ep.bus.mipi_csi2.num_data_lanes);

		return -EINVAL;

	}



	return 0;

}



static int imx274_probe(struct i2c_client *client)

{

	struct v4l2_subdev *sd;
@@ -1971,6 +2007,10 @@ static int imx274_probe(struct i2c_client *client) 


	mutex_init(&imx274->lock);



	ret = imx274_fwnode_parse(dev);

	if (ret)

		return ret;



	imx274->inck = devm_clk_get_optional(dev, "inck");

	if (IS_ERR(imx274->inck))

		return PTR_ERR(imx274->inck);