This commit adds the device tree bindings for aspeed eSPI controller. Although aspeed eSPI hardware supports 4 different channels, this commit only adds the support for flash channel, the bindings for other channels could be upstreamed when the driver support for those are added. Signed-off-by: Manojkiran Eda <manojkiran.eda@xxxxxxxxx> --- .../bindings/soc/aspeed/aspeed,espi.yaml | 94 +++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 Documentation/devicetree/bindings/soc/aspeed/aspeed,espi.yaml diff --git a/Documentation/devicetree/bindings/soc/aspeed/aspeed,espi.yaml b/Documentation/devicetree/bindings/soc/aspeed/aspeed,espi.yaml new file mode 100644 index 000000000000..3d3ad528e3b3 --- /dev/null +++ b/Documentation/devicetree/bindings/soc/aspeed/aspeed,espi.yaml @@ -0,0 +1,94 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +# # Copyright (c) 2024 IBM Corporation. +# # Copyright (c) 2021 Aspeed Technology Inc. +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/soc/aspeed/aspeed,espi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Aspeed eSPI Controller + +maintainers: + - Manojkiran Eda <manojkiran.eda@xxxxxxxxx> + - Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx> + - Chia-Wei Wang <chiawei_wang@xxxxxxxxxxxxxx> + - Ryan Chen <ryan_chen@xxxxxxxxxxxxxx> + +description: + Aspeed eSPI controller implements a device side eSPI endpoint device + supporting the flash channel. + +properties: + compatible: + items: + - enum: + - aspeed,ast2500-espi + - aspeed,ast2600-espi + - const: simple-mfd + - const: syscon + + reg: + maxItems: 1 + + "#address-cells": + const: 1 + + "#size-cells": + const: 1 + + ranges: true + +patternProperties: + "^espi-ctrl@[0-9a-f]+$": + type: object + + description: Controls the flash channel of eSPI hardware + + properties: + compatible: + items: + - enum: + - aspeed,ast2500-espi-ctrl + - aspeed,ast2600-espi-ctrl + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + required: + - compatible + - interrupts + - clocks + +required: + - compatible + - reg + - "#address-cells" + - "#size-cells" + - ranges + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/clock/ast2600-clock.h> + + espi: espi@1e6ee000 { + compatible = "aspeed,ast2600-espi", "simple-mfd", "syscon"; + reg = <0x1e6ee000 0x1000>; + + #address-cells = <1>; + #size-cells = <1>; + ranges = <0x0 0x1e6ee000 0x1000>; + + espi_ctrl: espi-ctrl@0 { + compatible = "aspeed,ast2600-espi-ctrl"; + reg = <0x0 0x800>,<0x0 0x4000000>; + reg-names = "espi_ctrl","espi_flash"; + interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&syscon ASPEED_CLK_GATE_ESPICLK>; + }; + }; -- 2.40.1
