linux-kernel - [PATCH 1/6] dt-bindings: clock: mediatek: Add mt8173 mfgtop

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Message-ID: <20240530083513.4135052-2-wenst@chromium.org>
Date: Thu, 30 May 2024 16:35:00 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: Frank Binns <frank.binns@...tec.com>,
	Matt Coster <matt.coster@...tec.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Stephen Boyd <sboyd@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: Chen-Yu Tsai <wenst@...omium.org>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	dri-devel@...ts.freedesktop.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/6] dt-bindings: clock: mediatek: Add mt8173 mfgtop

The MFG (GPU) block on the MT8173 has a small glue layer, named MFG_TOP
in the datasheet, that contains clock gates, some power sequence signal
delays, and other unknown registers that get toggled when the GPU is
powered on.

The clock gates are exposed as clocks provided by a clock controller,
while the power sequencing bits are exposed as one singular power domain.

Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
---
 .../clock/mediatek,mt8173-mfgtop.yaml         | 71 +++++++++++++++++++
 include/dt-bindings/clock/mt8173-clk.h        |  7 ++
 2 files changed, 78 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/mediatek,mt8173-mfgtop.yaml

diff --git a/Documentation/devicetree/bindings/clock/mediatek,mt8173-mfgtop.yaml b/Documentation/devicetree/bindings/clock/mediatek,mt8173-mfgtop.yaml
new file mode 100644
index 000000000000..03c3c1f8cf75
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/mediatek,mt8173-mfgtop.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+
+$id: http://devicetree.org/schemas/clock/mediatek,mt8173-mfgtop.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT8173 MFG TOP controller
+
+maintainers:
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
+
+description:
+  The MFG TOP glue layer controls various signals going to the MFG (GPU)
+  block on the MT8173.
+
+properties:
+  compatible:
+    const: mediatek,mt8173-mfgtop
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    minItems: 4
+    maxItems: 4
+
+  clock-names:
+    items:
+      - const: sys
+      - const: mem
+      - const: core
+      - const: clk26m
+
+  power-domains:
+    maxItems: 1
+
+  '#clock-cells':
+    const: 1
+
+  '#power-domain-cells':
+    const: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - power-domains
+  - '#clock-cells'
+  - '#power-domain-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+        #include <dt-bindings/clock/mt8173-clk.h>
+        #include <dt-bindings/power/mt8173-power.h>
+
+        mfgtop: clock-controller@...ff000 {
+            compatible = "mediatek,mt8173-mfgtop";
+            reg = <0x13fff000 0x1000>;
+            clocks = <&topckgen CLK_TOP_AXI_MFG_IN_SEL>,
+                     <&topckgen CLK_TOP_MEM_MFG_IN_SEL>,
+                     <&topckgen CLK_TOP_MFG_SEL>,
+                     <&clk26m>;
+            clock-names = "sys", "mem", "core", "clk26m";
+            power-domains = <&spm MT8173_POWER_DOMAIN_MFG>;
+            #clock-cells = <1>;
+            #power-domain-cells = <0>;
+        };
diff --git a/include/dt-bindings/clock/mt8173-clk.h b/include/dt-bindings/clock/mt8173-clk.h
index 3d00c98b9654..89e982f771db 100644
--- a/include/dt-bindings/clock/mt8173-clk.h
+++ b/include/dt-bindings/clock/mt8173-clk.h
@@ -243,6 +243,13 @@
 #define CLK_IMG_FD			7
 #define CLK_IMG_NR_CLK			8
 
+/* MFG_SYS */
+
+#define CLK_MFG_AXI			0
+#define CLK_MFG_MEM			1
+#define CLK_MFG_G3D			2
+#define CLK_MFG_26M			3
+
 /* MM_SYS */
 
 #define CLK_MM_SMI_COMMON		1
-- 
2.45.1.288.g0e0cd299f1-goog