Re: [PATCH net-next v3 3/3] net: stmmac: sun8i: add support for Allwinner H616 EMAC1

[Maxime Chevallier <maxime.chevallier@bootlin.com>]

Hi,

On 9/17/26 19:55, James Hilliard wrote:
> The H616 secondary EMAC uses a separate system-control clock register
> and supports only RMII at 10/100 Mbps. It connects internally to the
> co-packaged AC200 or AC300 EPHY and has no external PHY pins.
> 
> Add an EMAC1 variant using the dedicated register and enable only RMII.
> Leave PHY initialization to the PHY driver instead of using the H3
> internal-PHY controls. No RX or TX clock delays are configured for this
> RMII-only variant.
> 
> Co-developed-by: Richard Genoud <richard.genoud@bootlin.com>
> Signed-off-by: Richard Genoud <richard.genoud@bootlin.com>
> Signed-off-by: James Hilliard <james.hilliard1@gmail.com>

Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>

Thanks :)

Maxime

> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> index 4523a14f5e0c..1020168f1c3a 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
> @@ -81,6 +81,13 @@ static const struct reg_field sun8i_syscon_reg_field = {
>  	.msb = 31,
>  };
>  
> +/* EMAC1 clock register @ 0x34 in the "system control" address range */
> +static const struct reg_field sun8i_syscon_reg_field_emac1 = {
> +	.reg = 0x34,
> +	.lsb = 0,
> +	.msb = 31,
> +};
> +
>  /* EMAC clock register @ 0x164 in the CCU address range */
>  static const struct reg_field sun8i_ccu_reg_field = {
>  	.reg = 0x164,
> @@ -143,6 +150,13 @@ static const struct emac_variant emac_variant_h6 = {
>  	.tx_delay_max = 7,
>  };
>  
> +static const struct emac_variant emac_variant_h616_emac1 = {
> +	.syscon_field = &sun8i_syscon_reg_field_emac1,
> +	/* The co-packaged AC200/AC300 PHY does not use the H3 PHY controls. */
> +	.soc_has_internal_phy = false,
> +	.support_rmii = true,
> +};
> +
>  #define EMAC_BASIC_CTL0 0x00
>  #define EMAC_BASIC_CTL1 0x04
>  #define EMAC_INT_STA    0x08
> @@ -1276,6 +1290,8 @@ static const struct of_device_id sun8i_dwmac_match[] = {
>  		.data = &emac_variant_a64 },
>  	{ .compatible = "allwinner,sun50i-h6-emac",
>  		.data = &emac_variant_h6 },
> +	{ .compatible = "allwinner,sun50i-h616-emac1",
> +		.data = &emac_variant_h616_emac1 },
>  	{ }
>  };
>  MODULE_DEVICE_TABLE(of, sun8i_dwmac_match);
>