[PATCH] clk: imx8qxp: Defer instead of failing probe

[Diogo Manuel Pais Silva]

When of_clk_parent_fill is run before all the parent clocks have been probed then the probe function will return -EINVAL, making it so that the probe isn't attempted again. As fw_devlink is on by default this does not usually happen, but if fw_devlink is disabled then it is very possible that the parent clock will be probed after the lpcg first attempt, and the lpcg clock will not work.

Signed-off-by: Diogo Silva <diogo.pais at ttcontrol.com>
---
 drivers/clk/imx/clk-imx8qxp-lpcg.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c
index d0ccaa040225..520a05ea0bef 100644
--- a/drivers/clk/imx/clk-imx8qxp-lpcg.c
+++ b/drivers/clk/imx/clk-imx8qxp-lpcg.c
@@ -225,8 +225,8 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,

        ret = of_clk_parent_fill(np, parent_names, count);
        if (ret != count) {
-               dev_err(&pdev->dev, "failed to get clock parent names\n");
-               return count;
+               dev_warn(&pdev->dev, "failed to get all clock parent names\n");
+               return -EPROBE_DEFER;
        }

        ret = of_property_read_string_array(np, "clock-output-names",
--
2.34.1

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