linux-kernel - [PATCH v2 2/6] mfd: dt: Add bindings for the Aspeed SoC Display Controller (GFX)

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Date:   Thu,  3 Nov 2016 01:07:57 +1030
From:   Andrew Jeffery <andrew@...id.au>
To:     Lee Jones <lee.jones@...aro.org>,
        Linus Walleij <linus.walleij@...aro.org>
Cc:     Joel Stanley <joel@....id.au>, Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>, linux-gpio@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Andrew Jeffery <andrew@...id.au>
Subject: [PATCH v2 2/6] mfd: dt: Add bindings for the Aspeed SoC Display Controller (GFX)

The Aspeed SoC Display Controller is presented as a syscon device to
arbitrate access by display and pinmux drivers. Video pinmux
configuration on fifth generation SoCs depends on bits in both the
System Control Unit and the Display Controller.

Signed-off-by: Andrew Jeffery <andrew@...id.au>
---
 Documentation/devicetree/bindings/mfd/aspeed-gfx.txt | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/aspeed-gfx.txt

diff --git a/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt b/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt
new file mode 100644
index 000000000000..aea5370efd97
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/aspeed-gfx.txt
@@ -0,0 +1,17 @@
+* Device tree bindings for Aspeed SoC Display Controller (GFX)
+
+The Aspeed SoC Display Controller primarily does as its name suggests, but also
+participates in pinmux requests on the g5 SoCs. It is therefore considered a
+syscon device.
+
+Required properties:
+- compatible:		"aspeed,ast2500-gfx", "syscon"
+- reg:			contains offset/length value of the GFX memory
+			region.
+
+Example:
+
+gfx: display@...e6000 {
+	compatible = "aspeed,ast2500-gfx", "syscon";
+	reg = <0x1e6e6000 0x1000>;
+};
-- 
2.7.4