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media: i2c: imx290: Factor out clock initialization to separate function
Move the external clock initialization code from probe() to a separate function to improve readability. No functional change intended. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
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parent
63127235be
commit
e5d363ca82
1 changed files with 35 additions and 22 deletions
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@ -1120,6 +1120,34 @@ static int imx290_get_regulators(struct device *dev, struct imx290 *imx290)
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imx290->supplies);
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}
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static int imx290_init_clk(struct imx290 *imx290)
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{
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u32 xclk_freq;
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int ret;
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ret = fwnode_property_read_u32(dev_fwnode(imx290->dev),
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"clock-frequency", &xclk_freq);
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if (ret) {
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dev_err(imx290->dev, "Could not get xclk frequency\n");
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return ret;
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}
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/* external clock must be 37.125 MHz */
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if (xclk_freq != 37125000) {
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dev_err(imx290->dev, "External clock frequency %u is not supported\n",
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xclk_freq);
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return -EINVAL;
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}
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ret = clk_set_rate(imx290->xclk, xclk_freq);
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if (ret) {
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dev_err(imx290->dev, "Could not set xclk frequency\n");
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return ret;
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}
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return 0;
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}
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/*
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* Returns 0 if all link frequencies used by the driver for the given number
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* of MIPI data lanes are mentioned in the device tree, or the value of the
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@ -1204,7 +1232,6 @@ static int imx290_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct imx290 *imx290;
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u32 xclk_freq;
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int ret;
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imx290 = devm_kzalloc(dev, sizeof(*imx290), GFP_KERNEL);
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@ -1222,32 +1249,12 @@ static int imx290_probe(struct i2c_client *client)
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if (ret)
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return ret;
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/* get system clock (xclk) */
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/* Acquire resources. */
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imx290->xclk = devm_clk_get(dev, "xclk");
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if (IS_ERR(imx290->xclk))
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return dev_err_probe(dev, PTR_ERR(imx290->xclk),
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"Could not get xclk");
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ret = fwnode_property_read_u32(dev_fwnode(dev), "clock-frequency",
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&xclk_freq);
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if (ret) {
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dev_err(dev, "Could not get xclk frequency\n");
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return ret;
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}
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/* external clock must be 37.125 MHz */
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if (xclk_freq != 37125000) {
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dev_err(dev, "External clock frequency %u is not supported\n",
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xclk_freq);
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return -EINVAL;
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}
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ret = clk_set_rate(imx290->xclk, xclk_freq);
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if (ret) {
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dev_err(dev, "Could not set xclk frequency\n");
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return ret;
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}
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ret = imx290_get_regulators(dev, imx290);
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if (ret < 0)
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return dev_err_probe(dev, ret, "Cannot get regulators\n");
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@ -1258,8 +1265,14 @@ static int imx290_probe(struct i2c_client *client)
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return dev_err_probe(dev, PTR_ERR(imx290->rst_gpio),
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"Cannot get reset gpio\n");
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/* Initialize external clock frequency. */
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ret = imx290_init_clk(imx290);
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if (ret)
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return ret;
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mutex_init(&imx290->lock);
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/* Initialize and register subdev. */
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ret = imx290_subdev_init(imx290);
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if (ret)
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goto err_mutex;
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