Messages in this thread | | | Subject | Re: [RFC] ravb: Add support for optional txc_refclk | From | Sergei Shtylyov <> | Date | Sat, 12 Dec 2020 20:54:58 +0300 |
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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@gmail.com> [...] > 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()?
> + 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
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