Hello!

On 15.01.2021 23:19, Adam Ford wrote:

For devices that use a programmable clock for the avb reference clock,

   AVB.

the driver may need to enable them.  Add code to find the optional clock
and enable it when available.

Signed-off-by: Adam Ford <aford...@gmail.com>
[...]
diff --git a/drivers/net/ethernet/renesas/ravb_main.c 
b/drivers/net/ethernet/renesas/ravb_main.c
index bd30505fbc57..739e30f45daa 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -2148,6 +2148,14 @@ static int ravb_probe(struct platform_device *pdev)
                goto out_release;
        }
+ priv->refclk = devm_clk_get_optional(&pdev->dev, "refclk");
+       if (IS_ERR(priv->refclk)) {
+               error = PTR_ERR(priv->refclk);
+               goto out_release;
+       } else {

   No need for *else* after *goto*.

+               (void)clk_prepare_enable(priv->refclk);

   You can really omit (void)...
   Also, I'm not seeing where do you call clk_disable_unprepare()...

[...]

MBR, Sergei

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