Re: [PATCH 13/26] net: stmmac: dwmac-qcom-ethqos: make the rgmii clock optional

[Andrew Halaney]

On Mon, Jun 12, 2023 at 11:23:42AM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> 
> On sa8775p there's no RGMII clock so make it optional in the driver.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index 3438b6229351..252dca400071 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -663,7 +663,7 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
>  	ethqos->rgmii_config_loopback_en = data->rgmii_config_loopback_en;
>  	ethqos->has_emac3 = data->has_emac3;
>  
> -	ethqos->rgmii_clk = devm_clk_get(dev, "rgmii");
> +	ethqos->rgmii_clk = devm_clk_get_optional(dev, "rgmii");

This makes it optional for older platforms too, but as far as I know on
those platforms it is mandatory.

This can be enforced in dt-binding checks, but should we also enforce
that in the driver still? Honestly I feel like yes, but there's probably
some precedent maintainers follow on this front that I don't know of.


>  	if (IS_ERR(ethqos->rgmii_clk)) {
>  		ret = PTR_ERR(ethqos->rgmii_clk);
>  		goto out_config_dt;
> -- 
> 2.39.2
>