dt-bindings: regulator: Document MediaTek MT6363 PMIC Regulators

Add bindings for the regulators found in the MediaTek MT6363 PMIC,
usually found in board designs using the MT6991 Dimensity 9400 and
on MT8196 Kompanio SoC for Chromebooks, along with the MT6316 and
MT6373 PMICs.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/20251027110527.21002-4-angelogioacchino.delregno@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/regulator/mediatek,mt6363-regulator.yaml b/Documentation/devicetree/bindings/regulator/mediatek,mt6363-regulator.yaml
new file mode 100644 (file)
index 0000000..4f79d4f
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+++ b/Documentation/devicetree/bindings/regulator/mediatek,mt6363-regulator.yaml
@@ -0,0 +1,146 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/mediatek,mt6363-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT6363 PMIC Regulators
+
+maintainers:
+  - AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+
+description:
+  The MT6363 SPMI PMIC provides 10 BUCK and 25 LDO (Low DropOut) regulators
+  and can optionally provide overcurrent warnings with one ocp interrupt
+  for each voltage regulator.
+
+properties:
+  compatible:
+    const: mediatek,mt6363-regulator
+
+  reg:
+    maxItems: 1
+
+  vsys-vbuck1-supply:
+    description: Input supply for vbuck1
+
+  vsys-vbuck2-supply:
+    description: Input supply for vbuck2
+
+  vsys-vbuck3-supply:
+    description: Input supply for vbuck3
+
+  vsys-vbuck4-supply:
+    description: Input supply for vbuck4
+
+  vsys-vbuck5-supply:
+    description: Input supply for vbuck5
+
+  vsys-vbuck6-supply:
+    description: Input supply for vbuck6
+
+  vsys-vbuck7-supply:
+    description: Input supply for vbuck7
+
+  vsys-vs1-supply:
+    description: Input supply for vs1
+
+  vsys-vs2-supply:
+    description: Input supply for vs2
+
+  vsys-vs3-supply:
+    description: Input supply for vs3
+
+  vs1-ldo1-supply:
+    description: Input supply for va15, vio0p75, vm18, vrf18, vrf-io18
+
+  vs1-ldo2-supply:
+    description: Input supply for vcn15, vio18, vufs18
+
+  vs2-ldo1-supply:
+    description: Input supply for vsram-cpub, vsram-cpum, vrf12, vrf13, vufs12
+
+  vs2-ldo2-supply:
+    description: Input supply for va12-1, va12-2, vcn13, vsram-cpul
+
+  vs3-ldo1-supply:
+    description: Input supply for vsram-apu, vsram-digrf, vsram-mdfe
+
+  vs3-ldo2-supply:
+    description: Input supply for vsram-modem, vrf0p9
+
+  vsys-ldo1-supply:
+    description: Input supply for vaux18, vemc, vtref18
+
+patternProperties:
+  "^v(buck[1-7]|s[1-3])$":
+    description: Buck regulators
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+    properties:
+      regulator-allowed-modes:
+        description: |
+          Allowed Buck regulator operating modes allowed. Valid values below.
+            0 - Normal mode with automatic power saving, reducing the switching
+                frequency when light load conditions are detected
+            1 - Forced Continuous Conduction mode (FCCM) for improved voltage
+                regulation accuracy with constant switching frequency but lower
+                regulator efficiency
+            2 - Forced Low Power mode for improved regulator efficiency, used
+                when no heavy load is expected, does not limit the maximum out
+                current but unless only a light load is applied, there will be
+                regulation accuracy and efficiency losses.
+            3 - Forced Ultra Low Power mode for ultra low load, this greatly
+                reduces the maximum output power, makes the regulator to be
+                efficient only for ultra light load, and greatly reduces the
+                quiescent current (Iq) of the buck.
+        maxItems: 3
+        items:
+          enum: [ 0, 1, 2, 3 ]
+
+  "^va(12-1|12-2|15)$":
+    $ref: "#/$defs/ldo-common"
+
+  "^v(aux|m|rf-io|tref)18$":
+    $ref: "#/$defs/ldo-common"
+
+  "^v(cn13|cn15|emc)$":
+    $ref: "#/$defs/ldo-common"
+
+  "^vio(0p75|18)$":
+    $ref: "#/$defs/ldo-common"
+
+  "^vrf(0p9|12|13|18)$":
+    $ref: "#/$defs/ldo-common"
+
+  "^vsram-(apu|cpub|cpum|cpul|digrf|mdfe|modem)$":
+    $ref: "#/$defs/ldo-common"
+
+  "^vufs(12|18)$":
+    $ref: "#/$defs/ldo-common"
+
+$defs:
+  ldo-common:
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+    properties:
+      regulator-allowed-modes:
+        description: |
+          Allowed LDO regulator operating modes allowed. Valid values below.
+            0 - Normal mode with automatic power saving, reducing the switching
+                frequency when light load conditions are detected
+            2 - Forced Low Power mode for improved regulator efficiency, used
+                when no heavy load is expected, does not limit the maximum out
+                current but unless only a light load is applied, there will be
+                regulation accuracy and efficiency losses.
+        maxItems: 2
+        items:
+          enum: [ 0, 2 ]
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false