From 4afc11ae3b786ad8425435b70ab0285fbf951b05 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Mon, 16 Jan 2023 15:44:45 +0100 Subject: [PATCH] media: i2c: imx290: Factor out DT parsing to separate function Upstream commit 6b69c52277ed Make the probe() function more readable by factoring out the DT parsing code to a separate function. No functional change intended. Signed-off-by: Laurent Pinchart Reviewed-by: Alexander Stein Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/imx290.c | 95 +++++++++++++++++++++----------------- 1 file changed, 52 insertions(+), 43 deletions(-) --- a/drivers/media/i2c/imx290.c +++ b/drivers/media/i2c/imx290.c @@ -1142,111 +1142,124 @@ static s64 imx290_check_link_freqs(const return 0; } -static int imx290_probe(struct i2c_client *client) +static int imx290_parse_dt(struct imx290 *imx290) { - struct device *dev = &client->dev; - struct fwnode_handle *endpoint; /* Only CSI2 is supported for now: */ struct v4l2_fwnode_endpoint ep = { .bus_type = V4L2_MBUS_CSI2_DPHY }; - struct imx290 *imx290; - u32 xclk_freq; - s64 fq; + struct fwnode_handle *endpoint; int ret; + s64 fq; - imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL); - if (!imx290) - return -ENOMEM; - - imx290->dev = dev; - imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config); - if (IS_ERR(imx290->regmap)) { - dev_err(dev, "Unable to initialize I2C\n"); - return -ENODEV; - } - - endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(dev), NULL); + endpoint = fwnode_graph_get_next_endpoint(dev_fwnode(imx290->dev), NULL); if (!endpoint) { - dev_err(dev, "Endpoint node not found\n"); + dev_err(imx290->dev, "Endpoint node not found\n"); return -EINVAL; } ret = v4l2_fwnode_endpoint_alloc_parse(endpoint, &ep); fwnode_handle_put(endpoint); if (ret == -ENXIO) { - dev_err(dev, "Unsupported bus type, should be CSI2\n"); - goto err_endpoint; + dev_err(imx290->dev, "Unsupported bus type, should be CSI2\n"); + goto done; } else if (ret) { - dev_err(dev, "Parsing endpoint node failed\n"); - goto err_endpoint; + dev_err(imx290->dev, "Parsing endpoint node failed\n"); + goto done; } /* Get number of data lanes */ imx290->nlanes = ep.bus.mipi_csi2.num_data_lanes; if (imx290->nlanes != 2 && imx290->nlanes != 4) { - dev_err(dev, "Invalid data lanes: %d\n", imx290->nlanes); + dev_err(imx290->dev, "Invalid data lanes: %d\n", imx290->nlanes); ret = -EINVAL; - goto err_endpoint; + goto done; } - dev_dbg(dev, "Using %u data lanes\n", imx290->nlanes); + dev_dbg(imx290->dev, "Using %u data lanes\n", imx290->nlanes); if (!ep.nr_of_link_frequencies) { - dev_err(dev, "link-frequency property not found in DT\n"); + dev_err(imx290->dev, "link-frequency property not found in DT\n"); ret = -EINVAL; - goto err_endpoint; + goto done; } /* Check that link frequences for all the modes are in device tree */ fq = imx290_check_link_freqs(imx290, &ep); if (fq) { - dev_err(dev, "Link frequency of %lld is not supported\n", fq); + dev_err(imx290->dev, "Link frequency of %lld is not supported\n", + fq); ret = -EINVAL; - goto err_endpoint; + goto done; } + ret = 0; + +done: + v4l2_fwnode_endpoint_free(&ep); + return ret; +} + +static int imx290_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct imx290 *imx290; + u32 xclk_freq; + int ret; + + imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL); + if (!imx290) + return -ENOMEM; + + imx290->dev = dev; + imx290->regmap = devm_regmap_init_i2c(client, &imx290_regmap_config); + if (IS_ERR(imx290->regmap)) { + dev_err(dev, "Unable to initialize I2C\n"); + return -ENODEV; + } + + ret = imx290_parse_dt(imx290); + if (ret) + return ret; + /* get system clock (xclk) */ imx290->xclk = devm_clk_get(dev, "xclk"); if (IS_ERR(imx290->xclk)) { dev_err(dev, "Could not get xclk"); - ret = PTR_ERR(imx290->xclk); - goto err_endpoint; + return PTR_ERR(imx290->xclk); } ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency", &xclk_freq); if (ret) { dev_err(dev, "Could not get xclk frequency\n"); - goto err_endpoint; + return ret; } /* external clock must be 37.125 MHz */ if (xclk_freq != 37125000) { dev_err(dev, "External clock frequency %u is not supported\n", xclk_freq); - ret = -EINVAL; - goto err_endpoint; + return -EINVAL; } ret = clk_set_rate(imx290->xclk, xclk_freq); if (ret) { dev_err(dev, "Could not set xclk frequency\n"); - goto err_endpoint; + return ret; } ret = imx290_get_regulators(dev, imx290); if (ret < 0) { dev_err(dev, "Cannot get regulators\n"); - goto err_endpoint; + return ret; } imx290->rst_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(imx290->rst_gpio)) { dev_err(dev, "Cannot get reset gpio\n"); - ret = PTR_ERR(imx290->rst_gpio); - goto err_endpoint; + return PTR_ERR(imx290->rst_gpio); } mutex_init(&imx290->lock); @@ -1272,16 +1285,12 @@ static int imx290_probe(struct i2c_clien pm_runtime_enable(dev); pm_runtime_idle(dev); - v4l2_fwnode_endpoint_free(&ep); - return 0; err_subdev: imx290_subdev_cleanup(imx290); err_mutex: mutex_destroy(&imx290->lock); -err_endpoint: - v4l2_fwnode_endpoint_free(&ep); return ret; }