[PATCH v2 2/3] dt-bindings: regulator: document binding for MT6315 regulator

[Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>]

Add device tree binding information for MT6315 regulator driver.
Example bindings for MT6315 are added.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
---
 .../regulator/mtk,mt6315-regulator.yaml       | 88 +++++++++++++++++++
 include/dt-bindings/regulator/mtk,mt6315.h    | 17 ++++
 2 files changed, 105 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/mtk,mt6315-regulator.yaml
 create mode 100644 include/dt-bindings/regulator/mtk,mt6315.h

diff --git a/Documentation/devicetree/bindings/regulator/mtk,mt6315-regulator.yaml b/Documentation/devicetree/bindings/regulator/mtk,mt6315-regulator.yaml
new file mode 100644
index 000000000000..457606800d5b
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/mtk,mt6315-regulator.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/mtk,mt6315-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek MT6315 Regulator
+
+maintainers:
+  - Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
+
+description: |
+  The MT6315 is a power management IC (PMIC) configurable with SPMI.
+  that contains 4 BUCKs output which can combine with each other
+  by different efuse settings.
+
+allOf:
+  - $ref: "regulator.yaml#"
+
+properties:
+  $nodename:
+    pattern: "mt6315@[0-9]"
+  compatible:
+    enum:
+      - mediatek,mt6315_3-regulator
+      - mediatek,mt6315_6-regulator
+      - mediatek,mt6315_7-regulator
+
+  reg:
+    maxItems: 1
+
+  regulators:
+    type: object
+    description: List of regulators and its properties
+
+    patternProperties:
+      "^vbuck[1-4]$":
+        type: object
+
+        properties:
+          regulator-name:
+            pattern: "^vbuck[1-4]$"
+            description:
+              should be "vbuck1", ..., "vbuck4"
+
+          mtk,combined-regulator:
+            $ref: "/schemas/types.yaml#/definitions/uint32-array"
+            description: |
+              defines other bucks combined with this buck, must contain the following
+              values MT6315_VBUCK1, MT6315_VBUCK2, MT6315_VBUCK3, MT6315_VBUCK4
+
+    unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    /* This example shows that buck2 and buck4 are combined into buck1. */
+    #include <dt-bindings/regulator/mtk,mt6315.h>
+
+    mt6315@6 {
+      compatible = "mediatek,mt6315_6-regulator";
+      reg = <0x6 0 0xb 1>;
+
+      regulators {
+        vbuck1 {
+          regulator-compatible = "vbuck1";
+          regulator-min-microvolt = <300000>;
+          regulator-max-microvolt = <1193750>;
+          regulator-enable-ramp-delay = <256>;
+          regulator-allowed-modes = <0 1 2 4>;
+          mtk,combined-regulator = <MT6315_VBUCK2 MT6315_VBUCK4>;
+        };
+
+        vbuck3 {
+          regulator-compatible = "vbuck3";
+          regulator-min-microvolt = <300000>;
+          regulator-max-microvolt = <1193750>;
+          regulator-enable-ramp-delay = <256>;
+          regulator-allowed-modes = <0 1 2 4>;
+        };
+      };
+    };
diff --git a/include/dt-bindings/regulator/mtk,mt6315.h b/include/dt-bindings/regulator/mtk,mt6315.h
new file mode 100644
index 000000000000..6ed9b2b121db
--- /dev/null
+++ b/include/dt-bindings/regulator/mtk,mt6315.h
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2020 MediaTek Inc.
+ * Author: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
+ */
+
+#ifndef _DT_BINDINGS_REGULATOR_MTK_MT6315_H
+#define _DT_BINDINGS_REGULATOR_MTK_MT6315_H
+
+/* Regulator ID */
+#define MT6315_VBUCK1	1
+#define MT6315_VBUCK2	2
+#define MT6315_VBUCK3	3
+#define MT6315_VBUCK4	4
+#define MT6315_VBUCK_MAX	5
+
+#endif /* _DT_BINDINGS_REGULATOR_MTK_MT6315_H */
-- 
2.18.0
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