From c25e73d45d530f7285477f9ad59f03808c1284a3 Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Fri, 1 Nov 2024 09:03:47 +1300 Subject: [PATCH] dt-bindings: mfd: Add Realtek RTL9300 switch peripherals Add device tree schema for the Realtek RTL9300 switches. The RTL9300 family is made up of the RTL9301, RTL9302B, RTL9302C and RTL9303. These have the same SoC differ in the Ethernet switch/SERDES arrangement. Currently the only supported features are the syscon-reboot and i2c controllers. The syscon-reboot is needed to be able to reboot the board. The I2C controllers are slightly unusual because they each own an SCL pin (GPIO8 for the first controller, GPIO 17 for the second) but have 8 common SDA pins which can be assigned to either controller (but not both). Signed-off-by: Chris Packham Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20241031200350.274945-5-chris.packham@alliedtelesis.co.nz Signed-off-by: Lee Jones --- .../bindings/mfd/realtek,rtl9301-switch.yaml | 114 ++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml diff --git a/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml b/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml new file mode 100644 index 0000000000000..f053303ab1e6b --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/realtek,rtl9301-switch.yaml @@ -0,0 +1,114 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/realtek,rtl9301-switch.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Realtek Switch with Internal CPU + +maintainers: + - Chris Packham + +description: + The RTL9300 is a series of is an Ethernet switches with an integrated CPU. A + number of different peripherals are accessed through a common register block, + represented here as a syscon node. + +properties: + compatible: + items: + - enum: + - realtek,rtl9301-switch + - realtek,rtl9302b-switch + - realtek,rtl9302c-switch + - realtek,rtl9303-switch + - const: syscon + - const: simple-mfd + + reg: + maxItems: 1 + + '#address-cells': + const: 1 + + '#size-cells': + const: 1 + +patternProperties: + 'reboot@[0-9a-f]+$': + $ref: /schemas/power/reset/syscon-reboot.yaml# + + 'i2c@[0-9a-f]+$': + $ref: /schemas/i2c/realtek,rtl9301-i2c.yaml# + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + ethernet-switch@1b000000 { + compatible = "realtek,rtl9301-switch", "syscon", "simple-mfd"; + reg = <0x1b000000 0x10000>; + #address-cells = <1>; + #size-cells = <1>; + + reboot@c { + compatible = "syscon-reboot"; + reg = <0x0c 0x4>; + value = <0x01>; + }; + + i2c@36c { + compatible = "realtek,rtl9301-i2c"; + reg = <0x36c 0x14>; + #address-cells = <1>; + #size-cells = <0>; + + i2c@0 { + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + gpio@20 { + compatible = "nxp,pca9555"; + gpio-controller; + #gpio-cells = <2>; + reg = <0x20>; + }; + }; + + i2c@2 { + reg = <2>; + #address-cells = <1>; + #size-cells = <0>; + gpio@20 { + compatible = "nxp,pca9555"; + gpio-controller; + #gpio-cells = <2>; + reg = <0x20>; + }; + }; + }; + + i2c@388 { + compatible = "realtek,rtl9301-i2c"; + reg = <0x388 0x14>; + #address-cells = <1>; + #size-cells = <0>; + + i2c@7 { + reg = <7>; + #address-cells = <1>; + #size-cells = <0>; + gpio@20 { + compatible = "nxp,pca9555"; + gpio-controller; + #gpio-cells = <2>; + reg = <0x20>; + }; + }; + }; + }; + -- 2.47.2