[U-Boot] [PATCH] net/phy: refactor RTL8211F initialization

[Joe Hershberger <joe.hershberger@gmail.com>]

Hi Shengzhou Liu,

On Wed, Apr 22, 2015 at 5:22 AM, Shengzhou Liu
<Shengzhou.Liu@freescale.com> wrote:
> RTL8211F needs to enalbe TXDLY for RGMII during
> phy initialization, so move it to rtl8211f_config
> for early initialization.
>
> Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>
> cc: Joe Hershberger <joe.hershberger@gmail.com>
> ---
>  drivers/net/phy/realtek.c | 25 +++++++++++++++++--------
>  1 file changed, 17 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
> index 3917c82..d48095b 100644
> --- a/drivers/net/phy/realtek.c
> +++ b/drivers/net/phy/realtek.c
> @@ -43,6 +43,22 @@ static int rtl8211x_config(struct phy_device *phydev)
>         return 0;
>  }
>
> +static int rtl8211f_config(struct phy_device *phydev)
> +{
> +       phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);

Do you not need to disable the phy interrupt here?

> +
> +       if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
> +               /* enable TXDLY */
> +               phy_write(phydev, MDIO_DEVAD_NONE,
> +                         MIIM_RTL8211F_PAGE_SELECT, 0xd08);

Why do you not need to change the page back to default? Does it only
apply to one following command or something? I haven't read the data
sheet for this phy to understand its behavior, but want to make sure
it's clear here.  Please at least add a comment describing why the
page need not be changed back.

> +               phy_write(phydev, MDIO_DEVAD_NONE, 0x11, 0x109);

Is this TX delay board specific? Seems like it would be. Should it be
parameterized to come from a board CONFIG_? If not, at least add a
comment describing these magic numbers.

> +       }
> +
> +       genphy_config_aneg(phydev);
> +
> +       return 0;
> +}
> +
>  static int rtl8211x_parse_status(struct phy_device *phydev)
>  {
>         unsigned int speed;
> @@ -142,13 +158,6 @@ static int rtl8211f_parse_status(struct phy_device *phydev)
>                 phydev->speed = SPEED_10;
>         }
>
> -       if (phydev->interface == PHY_INTERFACE_MODE_RGMII) {
> -               /* enable TXDLY */
> -               phy_write(phydev, MDIO_DEVAD_NONE,
> -                         MIIM_RTL8211F_PAGE_SELECT, 0xd08);
> -               phy_write(phydev, MDIO_DEVAD_NONE, 0x11, 0x109);
> -       }
> -
>         return 0;
>  }
>
> @@ -209,7 +218,7 @@ static struct phy_driver RTL8211F_driver = {
>         .uid = 0x1cc916,
>         .mask = 0xffffff,
>         .features = PHY_GBIT_FEATURES,
> -       .config = &rtl8211x_config,
> +       .config = &rtl8211f_config,
>         .startup = &rtl8211f_startup,
>         .shutdown = &genphy_shutdown,
>  };
> --
> 2.1.0.27.g96db324
>