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SubjectRe: [PATCH v1 net-next] net: stmmac: enable clause 45 mdio support
On Wed, Jul 03, 2019 at 05:50:04PM +0800, Voon Weifeng wrote:
> @@ -155,22 +171,26 @@ static int stmmac_mdio_read(struct mii_bus *bus, int phyaddr, int phyreg)
> struct stmmac_priv *priv = netdev_priv(ndev);
> unsigned int mii_address = priv->hw->mii.addr;
> unsigned int mii_data = priv->hw->mii.data;
> - u32 v;
> - int data;
> u32 value = MII_BUSY;
> + int data = 0;
> + u32 v;
>
> value |= (phyaddr << priv->hw->mii.addr_shift)
> & priv->hw->mii.addr_mask;
> value |= (phyreg << priv->hw->mii.reg_shift) & priv->hw->mii.reg_mask;
> value |= (priv->clk_csr << priv->hw->mii.clk_csr_shift)
> & priv->hw->mii.clk_csr_mask;
> - if (priv->plat->has_gmac4)
> + if (priv->plat->has_gmac4) {
> value |= MII_GMAC4_READ;
> + if (phyreg & MII_ADDR_C45)
> + stmmac_mdio_c45_setup(priv, phyreg, &value, &data);
> + }
>
> if (readl_poll_timeout(priv->ioaddr + mii_address, v, !(v & MII_BUSY),
> 100, 10000))
> return -EBUSY;
>
> + writel(data, priv->ioaddr + mii_data);

That looks odd. Could you explain why it is needed.

Thanks
Andrew

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