linux-kernel - Re: [PATCH 0/4] ARM: sun7i: Convert A20 GMAC driver to CCU

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Date:   Mon, 20 Apr 2020 12:32:57 +0000
From:   Priit Laes <plaes@...es.org>
To:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Rob Herring <robh+dt@...nel.org>, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 0/4] ARM: sun7i: Convert A20 GMAC driver to CCU

On Sat, Apr 18, 2020 at 01:17:26AM +0300, Priit Laes wrote:
> This serie converts Allwinner A20 (sun7i) GMAC driver to CCU
> while still retaining compatibility with existing devicetrees.
> 
> First two patches contain preliminary work which convert
> sun4i/sun7i clock drivers to platform devices and creates regmap
> to access gmac register from the sun7i gmac driver.
> 
> Third patch implements syscon-based regmap to allow driver manage
> its own clock source.
> 
> Fourth patch updates the devicetree and drops the unused clocks.
> 
> While testing the driver I noticed following bugs with the existing
> sun7i gmac driver:
> - driver relies on u-boot for initialization (fixed in this
>   implementation)

Scratch that.. this is actually due to unhandled rx and tx delays,
which I "accidentally" fixed by copying the value BIT(12) from the
u-boot..

> - `systemctl restart networking` fails to bring the link up again.
> 
> 
> Priit Laes (4):
>   clk: sunxi-ng: a10/a20: rewrite init code to a platform driver
>   clk: sunxi-ng: a20: export a regmap to access the GMAC register
>   net: stmmac: dwmac-sunxi: Implement syscon-based clock handling
>   ARM: dts: sun7i: Use syscon-based implementation for gmac
> 
>  arch/arm/boot/dts/sun7i-a20.dtsi              |  36 +----
>  drivers/clk/sunxi-ng/ccu-sun4i-a10.c          | 108 ++++++++++++---
>  .../net/ethernet/stmicro/stmmac/dwmac-sunxi.c | 124 ++++++++++++++++--
>  3 files changed, 206 insertions(+), 62 deletions(-)
> 
> -- 
> 2.25.2
>