[U-Boot] [PATCH v3 2/5] net: sun8i-emac: support R40 GMAC

[Jagan Teki <jagannadh.teki@gmail.com>]

On Mon, Apr 23, 2018 at 8:27 PM, Lothar Felten <lothar.felten@gmail.com> wrote:
> Add support for the GMAC found in the Allwinner R40/V40 SoC.
>
> The R40 GMAC interface is not controlled by the syscon register but
> has a separate configuration register in the CCU.
> The clock gate and reset bits are in a different register compared
> to the other SoCs supported by this driver.
> The diver uses the -gmac suffix for the R40 because the R40 also
> has a different 100 MBit MAC (EMAC).
>
> Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
> ---
>  drivers/net/sun8i_emac.c | 69 +++++++++++++++++++++++++++++++++---------------
>  1 file changed, 47 insertions(+), 22 deletions(-)
>
> diff --git a/drivers/net/sun8i_emac.c b/drivers/net/sun8i_emac.c
> index b6e5dafe83..83844a1d40 100644
> --- a/drivers/net/sun8i_emac.c
> +++ b/drivers/net/sun8i_emac.c
> @@ -68,6 +68,8 @@
>
>  #if defined(CONFIG_MACH_SUNXI_H3_H5)
>  #define SUN8I_GPD8_GMAC                2
> +#elif defined(CONFIG_MACH_SUN8I_R40)
> +#define SUN8I_GPD8_GMAC                5

Can be done through driver_data?

>  #else
>  #define SUN8I_GPD8_GMAC                4
>  #endif
> @@ -99,6 +101,7 @@ DECLARE_GLOBAL_DATA_PTR;
>  enum emac_variant {
>         A83T_EMAC = 1,
>         H3_EMAC,
> +       R40_GMAC,
>         A64_EMAC,
>  };
>
> @@ -279,6 +282,9 @@ static int sun8i_emac_set_syscon(struct emac_eth_dev *priv)
>         int ret;
>         u32 reg;
>
> +       if (priv->variant == R40_GMAC)
> +               return 0;
> +
>         reg = readl(priv->sysctl_reg + 0x30);
>
>         if (priv->variant == H3_EMAC) {
> @@ -630,11 +636,25 @@ static void sun8i_emac_board_setup(struct emac_eth_dev *priv)
>         }
>  #endif
>
> +#ifdef CONFIG_MACH_SUN8I_R40
> +       /* Set clock gating for emac */
> +       setbits_le32(&ccm->ahb_reset1_cfg, BIT(AHB_RESET_OFFSET_GMAC));
> +
> +       /* De-assert EMAC */
> +       setbits_le32(&ccm->ahb_gate1, BIT(AHB_GATE_OFFSET_GMAC));
> +
> +       /* Select RGMII for R40 */
> +       setbits_le32(&ccm->gmac_clk_cfg, CCM_GMAC_CTRL_TX_CLK_SRC_INT_RGMII |
> +               CCM_GMAC_CTRL_GPIT_RGMII);
> +       setbits_le32(&ccm->gmac_clk_cfg,
> +                    CCM_GMAC_CTRL_TX_CLK_DELAY(CONFIG_GMAC_TX_DELAY));
> +#else

Can be done through driver_data variant?

Jagan.

-- 
Jagan Teki
Free Software Engineer | www.openedev.com
U-Boot, Linux | Upstream Maintainer
Hyderabad, India.