linux-kernel - [PATCH 1/5] dt-bindings: allow dwmac-sun8i to use other devices' exported regmap

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Date:   Wed, 11 Apr 2018 22:16:37 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Chen-Yu Tsai <wens@...e.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com, Icenowy Zheng <icenowy@...c.io>
Subject: [PATCH 1/5] dt-bindings: allow dwmac-sun8i to use other devices' exported regmap

On some Allwinner SoCs the EMAC clock register needed by dwmac-sun8i is
in another device's memory space. In this situation dwmac-sun8i can use
a regmap exported by the other device with only the EMAC clock register.

Document this situation in the dwmac-sun8i device tree binding
documentation.

Signed-off-by: Icenowy Zheng <icenowy@...c.io>
---
 Documentation/devicetree/bindings/net/dwmac-sun8i.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/dwmac-sun8i.txt b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
index 3d6d5fa0c4d5..0c5f63a80617 100644
--- a/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
+++ b/Documentation/devicetree/bindings/net/dwmac-sun8i.txt
@@ -20,8 +20,9 @@ Required properties:
 - phy-handle: See ethernet.txt
 - #address-cells: shall be 1
 - #size-cells: shall be 0
-- syscon: A phandle to the syscon of the SoC with one of the following
- compatible string:
+- syscon: A phandle to a device which exports the EMAC clock register as a
+ regmap or to the syscon of the SoC with one of the following compatible
+ string:
   - allwinner,sun8i-h3-system-controller
   - allwinner,sun8i-v3s-system-controller
   - allwinner,sun50i-a64-system-controller
-- 
2.15.1