linux-kernel - [RFC PATCH v2 11/19] dt-bindings: gpu: Add 'resets' property for GPU initialization

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Message-Id: <20241223125553.3527812-12-m.wilczynski@samsung.com>
Date: Mon, 23 Dec 2024 13:55:45 +0100
From: Michal Wilczynski <m.wilczynski@...sung.com>
To: mturquette@...libre.com, sboyd@...nel.org, robh@...nel.org,
	krzk+dt@...nel.org, conor+dt@...nel.org, drew@...7.com, guoren@...nel.org,
	wefu@...hat.com, jassisinghbrar@...il.com, paul.walmsley@...ive.com,
	palmer@...belt.com, aou@...s.berkeley.edu, frank.binns@...tec.com,
	matt.coster@...tec.com, maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com, simona@...ll.ch,
	ulf.hansson@...aro.org, jszhang@...nel.org, p.zabel@...gutronix.de,
	m.szyprowski@...sung.com
Cc: linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org, linux-pm@...r.kernel.org, Michal Wilczynski
	<m.wilczynski@...sung.com>
Subject: [RFC PATCH v2 11/19] dt-bindings: gpu: Add 'resets' property for
 GPU initialization

Many RISC-V boards featuring Imagination Technologies GPUs require a
reset line to be de-asserted as part of the GPU power-up sequence. To
support this, add a 'resets' property (and corresponding 'reset-names')
to the GPU device tree bindings. This ensures the GPU can be properly
initialized on these platforms.

Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
---
 .../devicetree/bindings/gpu/img,powervr-rogue.yaml          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
index 256e252f8087..4078cc816ea1 100644
--- a/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
+++ b/Documentation/devicetree/bindings/gpu/img,powervr-rogue.yaml
@@ -37,6 +37,12 @@ properties:
   power-domains:
     maxItems: 1
 
+  resets:
+    maxItems: 1
+
+  reset-names:
+    const: gpu
+
 required:
   - compatible
   - reg
-- 
2.34.1