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Subject: media: i2c: imx274: implement fwnode parsing Author: Eugen Hristev <[email protected]> Date: Tue Nov 23 13:04:21 2021 +0100 Implement fwnode parsing at probe time. Check if the bus and number of lanes are supported. Signed-off-by: Eugen Hristev <[email protected]> Signed-off-by: Sakari Ailus <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> drivers/media/i2c/imx274.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) --- diff --git a/drivers/media/i2c/imx274.c b/drivers/media/i2c/imx274.c index e31f006b10d9..2aa15b9c23cc 100644 --- a/drivers/media/i2c/imx274.c +++ b/drivers/media/i2c/imx274.c @@ -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); _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
