[PATCH v2 3/5] net: cadence: macb: Add support for Raspberry Pi RP1 ethernet controller

[Nicolas Ferre]

On 22/08/2025 at 11:34, Stanimir Varbanov wrote:
> From: Dave Stevenson <dave.stevenson at raspberrypi.com>
> 
> The RP1 chip has the Cadence GEM block, but wants the tx_clock
> to always run at 125MHz, in the same way as sama7g5.
> Add the relevant configuration.
> 
> Signed-off-by: Dave Stevenson <dave.stevenson at raspberrypi.com>
> Signed-off-by: Stanimir Varbanov <svarbanov at suse.de>
> Reviewed-by: Andrew Lunn <andrew at lunn.ch>

Acked-by: Nicolas Ferre <nicolas.ferre at microchip.com>

> ---
>   drivers/net/ethernet/cadence/macb_main.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 36717e7e5811..260fdac46f4b 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -5135,6 +5135,17 @@ static const struct macb_config versal_config = {
>          .usrio = &macb_default_usrio,
>   };
> 
> +static const struct macb_config raspberrypi_rp1_config = {
> +       .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |
> +               MACB_CAPS_JUMBO |
> +               MACB_CAPS_GEM_HAS_PTP,
> +       .dma_burst_length = 16,
> +       .clk_init = macb_clk_init,
> +       .init = macb_init,
> +       .usrio = &macb_default_usrio,
> +       .jumbo_max_len = 10240,
> +};
> +
>   static const struct of_device_id macb_dt_ids[] = {
>          { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
>          { .compatible = "cdns,macb" },
> @@ -5155,6 +5166,7 @@ static const struct of_device_id macb_dt_ids[] = {
>          { .compatible = "microchip,mpfs-macb", .data = &mpfs_config },
>          { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config },
>          { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config },
> +       { .compatible = "raspberrypi,rp1-gem", .data = &raspberrypi_rp1_config },
>          { .compatible = "xlnx,zynqmp-gem", .data = &zynqmp_config},
>          { .compatible = "xlnx,zynq-gem", .data = &zynq_config },
>          { .compatible = "xlnx,versal-gem", .data = &versal_config},
> --
> 2.47.0
>