linux-kernel - [PATCH v2 0/2] sun8i: r40: second ethernet support

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Message-Id: <20210309012116.2944-1-boger@wirenboard.com>
Date:   Tue,  9 Mar 2021 04:21:14 +0300
From:   Evgeny Boger <boger@...enboard.com>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org
Cc:     Evgeny Boger <boger@...enboard.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Rob Herring <robh+dt@...nel.org>
Subject: [PATCH v2 0/2] sun8i: r40: second ethernet support

This patch series adds support for two Ethernet ports on Allwinner R40.

R40 (aka V40,A40i,T3) has two different Ethernet IPs called EMAC and GMAC.
EMAC only support 10/100 Mbit in MII mode, while GMAC support both 10/100
(MII) and 10/100/1000 (RGMII).

In contrast to A10/A20 where GMAC and EMAC share the same pins making EMAC
somewhat pointless, on R40 EMAC can be routed to port H.
Both EMAC (on port H) and GMAC (on port A) can be then enabled at the same 
time, allowing for two ethernet ports.

Tested on custom A40i board with two IP101GRI PHYs in MII mode.

Changes in v2:
 - EMAC reset is no longer optional on R40
 - Add a new DT compatible string for R40 EMAC
 - Deassert reset line before enabling the clock
 - minor fixes: formatting, DT node order, leftover pinctrl props

Evgeny Boger (2):
  net: allwinner: reset control support
  dts: r40: add second ethernet support

 .../net/allwinner,sun4i-a10-emac.yaml         | 11 +++-
 arch/arm/boot/dts/sun8i-r40.dtsi              | 59 +++++++++++++++++
 drivers/net/ethernet/allwinner/sun4i-emac.c   | 65 +++++++++++++++++--
 3 files changed, 129 insertions(+), 6 deletions(-)

-- 
2.17.1