linux-kernel - [PATCH v2 1/2] dt-bindings: reset: mediatek: Add mt8188 SMI reset control binding

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Message-ID: <20241120063305.8135-2-friday.yang@mediatek.com>
Date: Wed, 20 Nov 2024 14:32:55 +0800
From: Friday Yang <friday.yang@...iatek.com>
To: Philipp Zabel <p.zabel@...gutronix.de>, 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>, Friday Yang
	<friday.yang@...iatek.com>
CC: <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-mediatek@...ts.infradead.org>,
	<Project_Global_Chrome_Upstream_Group@...iatek.com>
Subject: [PATCH v2 1/2] dt-bindings: reset: mediatek: Add mt8188 SMI reset control binding

From: "Friday Yang" <friday.yang@...iatek.com>

To support SMI clamp and reset operation in genpd callback, add
SMI LARB reset controller in the bindings. Add index in
mt8188-resets.h to query the reset signal in the SMI reset
control driver.

Signed-off-by: Friday Yang <friday.yang@...iatek.com>
---
 .../bindings/reset/mediatek,smi-reset.yaml    | 53 +++++++++++++++++++
 include/dt-bindings/reset/mt8188-resets.h     | 11 ++++
 2 files changed, 64 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/mediatek,smi-reset.yaml

diff --git a/Documentation/devicetree/bindings/reset/mediatek,smi-reset.yaml b/Documentation/devicetree/bindings/reset/mediatek,smi-reset.yaml
new file mode 100644
index 000000000000..77a6197a9846
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/mediatek,smi-reset.yaml
@@ -0,0 +1,53 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2024 MediaTek Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/mediatek,smi-reset.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek SMI Reset Controller
+
+maintainers:
+  - Friday Yang <friday.yang@...iatek.com>
+
+description: |
+  This reset controller node is used to perform reset management
+  of SMI larbs on MediaTek platform. It is used to implement various
+  reset functions required when SMI larbs apply clamp operation.
+
+  For list of all valid reset indices see
+    <dt-bindings/reset/mt8188-resets.h> for MT8188.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8188-smi-reset
+
+  "#reset-cells":
+    const: 1
+    description:
+      The cell should be the device ID. SMI reset controller driver could
+      query the reset signal of each SMI larb by device ID.
+
+  mediatek,larb-rst:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle of each subsys clock controller. SMI larbs are located in
+      these subsys. SMI needs to parse the node of each subsys clock
+      controller to get the register address, and then apply the reset
+      operation.
+
+required:
+  - compatible
+  - "#reset-cells"
+  - mediatek,larb-rst
+
+additionalProperties: false
+
+examples:
+  - |
+    reset-controller {
+        compatible = "mediatek,mt8188-smi-reset";
+        #reset-cells = <1>;
+        mediatek,larb-rst = <&imgsys1_dip_top>;
+    };
diff --git a/include/dt-bindings/reset/mt8188-resets.h b/include/dt-bindings/reset/mt8188-resets.h
index 5a58c54e7d20..387a4beac688 100644
--- a/include/dt-bindings/reset/mt8188-resets.h
+++ b/include/dt-bindings/reset/mt8188-resets.h
@@ -113,4 +113,15 @@
 #define MT8188_VDO1_RST_HDR_GFX_FE1_DL_ASYNC	52
 #define MT8188_VDO1_RST_HDR_VDO_BE_DL_ASYNC	53

+#define MT8188_SMI_RST_LARB10			0
+#define MT8188_SMI_RST_LARB11A			1
+#define MT8188_SMI_RST_LARB11C			2
+#define MT8188_SMI_RST_LARB12			3
+#define MT8188_SMI_RST_LARB11B			4
+#define MT8188_SMI_RST_LARB15			5
+#define MT8188_SMI_RST_LARB16B			6
+#define MT8188_SMI_RST_LARB17B			7
+#define MT8188_SMI_RST_LARB16A			8
+#define MT8188_SMI_RST_LARB17A			9
+
 #endif  /* _DT_BINDINGS_RESET_CONTROLLER_MT8188 */
--
2.46.0