linux-kernel - [RFC PATCH v2 1/2] dt-bindings: wifi: Add support for Nordic nRF70

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Message-ID: <20250422175918.585022-2-artur@conclusive.pl>
Date: Tue, 22 Apr 2025 19:59:17 +0200
From: Artur Rojek <artur@...clusive.pl>
To: Johannes Berg <johannes@...solutions.net>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>
Cc: linux-wireless@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Jakub Klama <jakub@...clusive.pl>,
	Wojciech Kloska <wojciech@...clusive.pl>,
	Ulf Axelsson <ulf.axelsson@...dicsemi.no>,
	Artur Rojek <artur@...clusive.pl>
Subject: [RFC PATCH v2 1/2] dt-bindings: wifi: Add support for Nordic nRF70

Add a documentation file to describe the Device Tree bindings for the
Nordic Semiconductor nRF70 series wireless companion IC.

Signed-off-by: Artur Rojek <artur@...clusive.pl>
---

v2: - rename the patch subject to comply with DT submission rules 
    - fix a typo in reg property name and correct its indentation
    - replace all gpio based properties as follows:
      - irq-gpios with interrupts/interrupt-names
      - bucken-gpios/iovdd-gpios with vpwr-supply/vio-supply
    - clarify usage of said properties in their descriptions
    - add a reference to spi-peripheral-props.yaml#
    - specify unevaluatedProperties
    - drop unused voltage-ranges property
    - update bindings example accordingly w/ above changes

 .../bindings/net/wireless/nordic,nrf70.yaml   | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/wireless/nordic,nrf70.yaml

diff --git a/Documentation/devicetree/bindings/net/wireless/nordic,nrf70.yaml b/Documentation/devicetree/bindings/net/wireless/nordic,nrf70.yaml
new file mode 100644
index 000000000000..c9a41b61c624
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/wireless/nordic,nrf70.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/wireless/nordic,nrf70.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nordic Semiconductor nRF70 series wireless companion IC
+
+maintainers:
+  - Artur Rojek <artur@...clusive.tech>
+
+properties:
+  compatible:
+    const: nordic,nrf70
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+    description: HOST_IRQ line, used for host processor interrupt requests.
+
+  interrupt-names:
+    description: Name for the HOST_IRQ line. This must be set to "host-irq".
+    const: host-irq
+
+  vpwr-supply:
+    description: BUCKEN line, used for PWR IP state control.
+
+  vio-supply:
+    description: IOVDD line, used for I/O pins voltage control. Optional.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - vpwr-supply
+
+allOf:
+  - $ref: /schemas/spi/spi-peripheral-props.yaml#
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    reg_nrf70_buck: regulator-nrf70-buck {
+        compatible = "regulator-fixed";
+        regulator-name = "nrf70_buck";
+        gpio = <&gpio2 24 GPIO_ACTIVE_HIGH>;
+        enable-active-high;
+    };
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        nrf7002@0 {
+            compatible = "nordic,nrf70";
+            reg = <0>;
+            spi-max-frequency = <32000000>;
+            interrupt-parent = <&gpio2>;
+            interrupts = <13 GPIO_ACTIVE_HIGH>;
+            interrupt-names = "host-irq";
+            vpwr-supply = <&reg_nrf70_buck>;
+            spi-rx-bus-width = <4>;
+            spi-tx-bus-width = <4>;
+        };
+    };
-- 
2.49.0