linux-kernel - [PATCH v6 2/4] dt-bindings: firmware: arm,scmi: support pinctrl protocol

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Message-Id: <20240323-pinctrl-scmi-v6-2-a895243257c0@nxp.com>
Date: Sat, 23 Mar 2024 20:15:15 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Dan Carpenter <dan.carpenter@...aro.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-gpio@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH v6 2/4] dt-bindings: firmware: arm,scmi: support pinctrl
 protocol

From: Peng Fan <peng.fan@....com>

Add SCMI v3.2 pinctrl protocol bindings and example.

Reviewed-by: Rob Herring <robh@...nel.org>
Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Peng Fan <peng.fan@....com>
---
 .../devicetree/bindings/firmware/arm,scmi.yaml     | 50 ++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 4591523b51a0..e9d3f043c4ed 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -247,6 +247,37 @@ properties:
       reg:
         const: 0x18
 
+  protocol@19:
+    type: object
+    allOf:
+      - $ref: '#/$defs/protocol-node'
+      - $ref: /schemas/pinctrl/pinctrl.yaml
+
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        const: 0x19
+
+    patternProperties:
+      '-pins$':
+        type: object
+        allOf:
+          - $ref: /schemas/pinctrl/pincfg-node.yaml#
+          - $ref: /schemas/pinctrl/pinmux-node.yaml#
+        unevaluatedProperties: false
+
+        description:
+          A pin multiplexing sub-node describes how to configure a
+          set of pins in some desired function.
+          A single sub-node may define several pin configurations.
+          This sub-node is using the default pinctrl bindings to configure
+          pin multiplexing and using SCMI protocol to apply a specified
+          configuration.
+
+    required:
+      - reg
+
 additionalProperties: false
 
 $defs:
@@ -401,6 +432,25 @@ examples:
             scmi_powercap: protocol@18 {
                 reg = <0x18>;
             };
+
+            scmi_pinctrl: protocol@19 {
+                reg = <0x19>;
+
+                i2c2-pins {
+                    groups = "g_i2c2_a", "g_i2c2_b";
+                    function = "f_i2c2";
+                };
+
+                mdio-pins {
+                    groups = "g_avb_mdio";
+                    drive-strength = <24>;
+                };
+
+                keys_pins: keys-pins {
+                    pins = "gpio_5_17", "gpio_5_20", "gpio_5_22", "gpio_2_1";
+                    bias-pull-up;
+                };
+            };
         };
     };
 

-- 
2.37.1