linux-kernel - [PATCH 1/6] dt-bindings: mfd: add bindings for QIXIS CPLD

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Message-Id: <20250430153634.2971736-2-ioana.ciornei@nxp.com>
Date: Wed, 30 Apr 2025 18:36:29 +0300
From: Ioana Ciornei <ioana.ciornei@....com>
To: Lee Jones <lee@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 1/6] dt-bindings: mfd: add bindings for QIXIS CPLD

This adds device tree bindings for the board management controller -
QIXIS CPLD - found on some Layerscape based boards such as LX2160A-RDB,
LX2160AQDS, LS1028AQDS etc.

Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 .../bindings/mfd/fsl,qixis-i2c.yaml           | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/fsl,qixis-i2c.yaml

diff --git a/Documentation/devicetree/bindings/mfd/fsl,qixis-i2c.yaml b/Documentation/devicetree/bindings/mfd/fsl,qixis-i2c.yaml
new file mode 100644
index 000000000000..562878050916
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/fsl,qixis-i2c.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/fsl,qixis-i2c.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP's QIXIS CPLD board management controller
+
+maintainers:
+  - Ioana Ciornei <ioana.ciornei@....com>
+
+description: |
+  The board management controller found on some Layerscape boards contains
+  different IP blocks like GPIO controllers, interrupt controllers, reg-muxes
+  etc.
+
+properties:
+  compatible:
+    enum:
+      - fsl,lx2160a-qds-qixis-i2c
+      - fsl,lx2162a-qds-qixis-i2c
+      - fsl,ls1028a-qds-qixis-i2c
+
+  reg:
+    description:
+      I2C device address.
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  mux-controller:
+    $ref: /schemas/mux/reg-mux.yaml#
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        qixis@66 {
+            compatible = "fsl,lx2160a-qds-qixis-i2c";
+            reg = <0x66>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            mux: mux-controller {
+                compatible = "reg-mux";
+                #mux-control-cells = <1>;
+                mux-reg-masks = <0x54 0xf8>, /* 0: reg 0x54, bits 7:3 */
+                                <0x54 0x07>; /* 1: reg 0x54, bit 2:0 */
+            };
+        };
+    };
-- 
2.25.1