> > +/* Set Management Data Clock, must be call after device reset */
> > +static void sun8i_emac_set_mdc(struct net_device *ndev)
> > +{
> > + struct sun8i_emac_priv *priv = netdev_priv(ndev);
> > + unsigned long rate;
> > + u32 reg;
> > +
> > + rate = clk_get_rate(priv->ahb_clk);
> > + if (rate > 160000000)
> > + reg = 0x3 << 20; /* AHB / 128 */
> > + else if (rate > 80000000)
> > + reg = 0x2 << 20; /* AHB / 64 */
> > + else if (rate > 40000000)
> > + reg = 0x1 << 20; /* AHB / 32 */
> > + else
> > + reg = 0x0 << 20; /* AHB / 16 */
> > + netif_dbg(priv, link, ndev, "MDC auto : %x\n", reg);
> > + writel(reg, priv->base + SUN8I_EMAC_MDIO_CMD);
>
> You could also expose that as a clock.
>
For which purpose ?
No ethernet driver expose the MDC as clock and I dont see any interest:
- I dont think that tuning it give any gain
- Knowing it's value is of little interest
Regards
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