[PATCH 2/3] net: hisilicon: new hip04 MDIO driver

[Zhangfei Gao]

Dear Florian

On Wed, Mar 19, 2014 at 1:28 AM, Florian Fainelli <f.fainelli at gmail.com> wrote:
> 2014-03-18 1:40 GMT-07:00 Zhangfei Gao <zhangfei.gao at linaro.org>:

>> +static int hip04_mdio_reset(struct mii_bus *bus)
>> +{
>> +       int temp, err, i;
>> +
>> +       for (i = 0; i < 2; i++) {
>> +               hip04_mdio_write(bus, i, 22, 0);
>> +               temp = hip04_mdio_read(bus, i, MII_BMCR);
>> +               temp |= BMCR_RESET;
>> +               err = hip04_mdio_write(bus, i, MII_BMCR, temp);
>> +               if (err < 0)
>> +                       return err;
>> +       }
>> +
>> +       mdelay(500);
>
> This does not look correct, you should iterate over all possible PHYs:
> PHY_MAX_ADDR instead of hardcoding the loop to 2.

OK, got it.
Use 2 is since only have 2 phy in the board, will use PHY_MAX_ADDR instead.
>
> I think we might want to remove the mdio bus reset callback in general
> as the PHY library should already take care of software resetting the
> PHY to put it in a sane state, as well as waiting for the appropriate
> delay before using, unlike here, where you do not poll for BMCR_RESET
> to be cleared by the PHY.
>
Do you mean will move BMCR_RESET to common code, that's would be great.
The mdio_reset is added here to get phy_id, otherwise the phy_id can
not be read as well as detection.

Thanks