linux-kernel - [PATCH v2 1/2] dt-bindings: gpu: mali-midgard: Add resets property

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Message-Id: <20190315135655.28359-2-narmstrong@baylibre.com>
Date:   Fri, 15 Mar 2019 14:56:54 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     devicetree@...r.kernel.org, khilman@...libre.com, icenowy@...c.io
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        dri-devel@...ts.freedesktop.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/2] dt-bindings: gpu: mali-midgard: Add resets property

The Amlogic ARM Mali Midgard requires reset controls to power on and
software reset the GPU, adds these as optional in the bindings.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 .../devicetree/bindings/gpu/arm,mali-midgard.txt   | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
index 18a2cde2e5f3..1b1a74129141 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.txt
@@ -37,6 +37,20 @@ Optional properties:
 - operating-points-v2 : Refer to Documentation/devicetree/bindings/opp/opp.txt
   for details.
 
+- resets : Phandle of the GPU reset line.
+
+Vendor-specific bindings
+------------------------
+
+The Mali GPU is integrated very differently from one SoC to
+another. In order to accomodate those differences, you have the option
+to specify one more vendor-specific compatible, among:
+
+- "amlogic,meson-gxm-mali"
+  Required properties:
+  - resets : Should contain phandles of :
+    + GPU reset line
+    + GPU APB glue reset line
 
 Example for a Mali-T760:
 
-- 
2.20.1