Re: [PATCH RFC/RFT 0/2] net: stmmac: Add support for Allwinner A733 GMAC210

[Andre Przywara <andre.przywara@arm.com>]

Hi,

On 7/31/26 18:30, Jerome Brunet wrote:
> The A733 GMAC210 is a DesignWare MAC 5.20 with an Allwinner glue close to
> the A523 GMAC200 already supported by dwmac-sun55i, but with a few
> significant differences:
> 
>   * The glue configuration registers are a dedicated MMIO region of the
>     controller instead of a syscon register.
>   * That region is inside the controller reset domain, so the reset must be
>     released before the configuration is written, and must not be asserted
>     again afterwards or the configuration is lost.
>   * The DMA channels have their own interrupt lines.
>   * A PTP reference clock and an AHB reset are needed.
>   * The controllers do not require a power domain (AFAIK).
>   * The TX clock delay value is 5 bits wide instead of 3, split over 2
>     register fields.
> 
> The DT changes for the A733 and the Cubie A7A board are not part of this
> series and will be sent separately through the sunxi tree.
> 
> Tested on a Cubie A7A, RGMII with an external PHY on GMAC0.
> 
> Full disclosure: at the moment there is a problem with EEE/LPI while
> testing on the Cubie A7A. If the device stays in LPI mode long enough, the
> link sometimes (but not always) goes down, coming back up when the device
> exits LPI mode.

I saw that the MAXIO PHY *vendor* driver disables exactly those two 
modes, so is this maybe more of a PHY problem?

Cheers,
Andre

> 
> I'm currently working around the problem by adding the following
> properties to the PHY node:
> 
> 	eee-broken-100tx;
> 	eee-broken-1000t;
> 
> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
> ---
> Jerome Brunet (2):
>        dt-bindings: net: sun8i-emac: Add A733 GMAC210 compatible
>        net: stmmac: Add support for Allwinner A733 GMAC210
> 
>   .../bindings/net/allwinner,sun8i-a83t-emac.yaml    | 130 +++++++++++++++---
>   drivers/net/ethernet/stmicro/stmmac/dwmac-sun55i.c | 145 ++++++++++++++++++---
>   2 files changed, 242 insertions(+), 33 deletions(-)
> ---
> base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
> change-id: 20260731-allwinner-a733-gmac-support-163bde10c152
> 
> Best regards,
> --
> Jerome
> 
>