linux-kernel - [PATCH v1 1/5] dt-bindings: spmi: Add MediaTek MT8196 SPMI 2 Arbiter/Controllers

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Message-ID: <20250623120047.108961-2-angelogioacchino.delregno@collabora.com>
Date: Mon, 23 Jun 2025 14:00:43 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: sboyd@...nel.org
Cc: robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	matthias.bgg@...il.com,
	angelogioacchino.delregno@...labora.com,
	hsin-hsiung.wang@...iatek.com,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org,
	kernel@...labora.com
Subject: [PATCH v1 1/5] dt-bindings: spmi: Add MediaTek MT8196 SPMI 2 Arbiter/Controllers

Document the MT8196 SPMI 2.0 Controller with a new schema.
This is a MIPI SPMI 2.0 compliant IP, composed of a main arbiter
and two SPMI master controllers with Request Capable Slave (RCS)
support.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
---
 .../bindings/spmi/mediatek,mt8196-spmi.yaml   | 138 ++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spmi/mediatek,mt8196-spmi.yaml

diff --git a/Documentation/devicetree/bindings/spmi/mediatek,mt8196-spmi.yaml b/Documentation/devicetree/bindings/spmi/mediatek,mt8196-spmi.yaml
new file mode 100644
index 000000000000..d7eb63e81a5c
--- /dev/null
+++ b/Documentation/devicetree/bindings/spmi/mediatek,mt8196-spmi.yaml
@@ -0,0 +1,138 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spmi/mediatek,mt8196-spmi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT8196 SPMI 2.0 Controller
+
+maintainers:
+  - Hsin-Hsiung Wang <hsin-hsiung.wang@...iatek.com>
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
+
+description:
+  The MediaTek MT8196 SoC features a SPMI version 2.0 compliant controller,
+  with internal wrapping arbitration logic to allow for multiple on-chip
+  devices to control up to two SPMI buses.
+  The main arbiter also acts as an interrupt controller, arbitering also
+  the interrupts coming from SPMI-connected devices into each of the nested
+  interrupt controllers from any of the present SPMI buses.
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - mediatek,mt8196-spmi
+      - items:
+          - enum:
+              - mediatek,mt6991-spmi
+          - const: mediatek,mt8196-spmi
+
+  ranges: true
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+patternProperties:
+  "^spmi@[a-f0-9]+$":
+    type: object
+    $ref: /schemas/spmi/spmi.yaml
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        items:
+          - description: controller interface registers
+          - description: spmi master controller registers
+
+      reg-names:
+        items:
+          - const: pmif
+          - const: spmimst
+
+      clocks:
+        items:
+          - description: controller interface system clock
+          - description: controller interface timer clock
+          - description: spmi controller master clock
+
+      clock-names:
+        items:
+          - const: pmif_sys_ck
+          - const: pmif_tmr_ck
+          - const: spmimst_clk_mux
+
+      interrupts:
+        maxItems: 1
+
+      interrupt-names:
+        const: rcs
+
+      interrupt-controller: true
+
+      "#interrupt-cells":
+        const: 3
+        description: |
+          cell 1: slave ID for the requested interrupt (0-15)
+          cell 2: the requested peripheral interrupt (0-7)
+          cell 3: interrupt flags indicating level-sense information,
+                  as defined in dt-bindings/interrupt-controller/irq.h
+    required:
+      - reg
+      - reg-names
+      - clocks
+      - clock-names
+      - interrupts
+      - interrupt-names
+      - interrupt-controller
+      - "#interrupt-cells"
+
+required:
+  - compatible
+  - ranges
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+
+      spmi-arbiter@...18000 {
+        compatible = "mediatek,mt8196-spmi";
+        ranges = <0 0 0x1c018000 0x4900>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        spmi@0 {
+          reg = <0 0x900>, <0x4800 0x100>;
+          reg-names = "pmif", "spmimst";
+          interrupts-extended = <&pio 292 IRQ_TYPE_LEVEL_HIGH>;
+          interrupt-names = "rcs";
+         interrupt-controller;
+          #interrupt-cells = <3>;
+          clocks = <&pmif_sys>, <&pmif_tmr>, <&spmi_mst>;
+          clock-names = "pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux";
+        };
+
+        spmi@...0 {
+          reg = <0x2000 0x900>, <0x4000 0x100>;
+          reg-names = "pmif", "spmimst";
+          interrupts-extended = <&pio 291 IRQ_TYPE_LEVEL_HIGH>;
+          interrupt-names = "rcs";
+          interrupt-controller;
+          #interrupt-cells = <3>;
+          clocks = <&pmif_sys>, <&pmif_tmr>, <&spmi_mst>;
+          clock-names = "pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux";
+        };
+      };
+    };
+...
-- 
2.49.0