On Sat, Dec 12, 2020 at 11:55 AM Sergei Shtylyov
<sergei.shtylyov@xxxxxxxxx> wrote:
>
> Hello!
>
> On 12.12.2020 19:56, Adam Ford wrote:
>
> > The SoC expects the txv_refclk is provided, but if it is provided
> > by a programmable clock, there needs to be a way to get and enable
> > this clock to operate. It needs to be optional since it's only
> > necessary for those with programmable clocks.
> >
> > Signed-off-by: Adam Ford <aford173@xxxxxxxxx>
> [...]
> > diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> > index bd30505fbc57..4c3f95923ef2 100644
> > --- a/drivers/net/ethernet/renesas/ravb_main.c
> > +++ b/drivers/net/ethernet/renesas/ravb_main.c
> > @@ -2148,6 +2148,18 @@ static int ravb_probe(struct platform_device *pdev)
> > goto out_release;
> > }
> >
> > + priv->ref_clk = devm_clk_get(&pdev->dev, "txc_refclk");
>
> Why not devm_clk_get_optional()?
I am not that familiar with the clock API. I'll look into that
function. It looks like it makes more sense. I'll send a V2.
adam
>
> > + if (IS_ERR(priv->ref_clk)) {
> > + if (PTR_ERR(priv->ref_clk) == -EPROBE_DEFER) {
> > + /* for Probe defer return error */
> > + error = PTR_ERR(priv->ref_clk);
> > + goto out_release;
> > + }
> > + /* Ignore other errors since it's optional */
> > + } else {
> > + (void)clk_prepare_enable(priv->ref_clk);
> > + }
> > +
> > ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN);
> > ndev->min_mtu = ETH_MIN_MTU;
> >
>
> MBR, Sergei
