linux-kernel - [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC

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Date:   Wed, 21 Dec 2022 21:09:14 +0000
From:   Fabrizio Castro <fabrizio.castro.jz@...esas.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Sebastian Reichel <sre@...nel.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
        Lee Jones <lee@...nel.org>, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Jacopo Mondi <jacopo@...ndi.org>
Subject: [PATCH v2 1/4] dt-bindings: mfd: Add RZ/V2M PWC

The Renesas RZ/V2M External Power Sequence Controller (PWC)
IP is a multi-function device, and it's capable of:
* external power supply on/off sequence generation
* on/off signal generation for the LPDDR4 core power supply (LPVDD)
* key input signals processing
* general-purpose output pins

Add the corresponding dt-bindings.

Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
---

v1->v2: I have dropped syscon, simple-mfd, regmap, offset, and the child nodes.

 .../bindings/mfd/renesas,rzv2m-pwc.yaml       | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml b/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml
new file mode 100644
index 000000000000..e6794c5152d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/renesas,rzv2m-pwc.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/renesas,rzv2m-pwc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RZ/V2M External Power Sequence Controller (PWC)
+
+description: |+
+  The PWC IP found in the RZ/V2M family of chips comes with the below
+  capabilities
+    - external power supply on/off sequence generation
+    - on/off signal generation for the LPDDR4 core power supply (LPVDD)
+    - key input signals processing
+    - general-purpose output pins
+
+maintainers:
+  - Fabrizio Castro <fabrizio.castro.jz@...esas.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - renesas,r9a09g011-pwc # RZ/V2M
+          - renesas,r9a09g055-pwc # RZ/V2MA
+      - const: renesas,rzv2m-pwc
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+  renesas,rzv2m-pwc-power:
+    description: The PWC is used to control the system power supplies.
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - '#gpio-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    pwc: pwc@...00000 {
+      compatible = "renesas,r9a09g011-pwc", "renesas,rzv2m-pwc";
+      reg = <0xa3700000 0x800>;
+      gpio-controller;
+      #gpio-cells = <2>;
+      renesas,rzv2m-pwc-power;
+    };
-- 
2.34.1