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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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7a609bc30c
Add the appropriate compatible string, and document the new reg properties of the AST2700 FSI controller, which can directly access the FSI controller registers as well as the FSI link address space. Signed-off-by: Eddie James <eajames@linux.ibm.com> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240522192524.3286237-10-eajames@linux.ibm.com Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
122 lines
2.9 KiB
YAML
122 lines
2.9 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/fsi/aspeed,ast2600-fsi-master.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Aspeed FSI master
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maintainers:
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- Eddie James <eajames@linux.ibm.com>
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description:
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The AST2600 and later contain two identical FSI masters. They share a
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clock and have a separate interrupt line and output pins.
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properties:
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compatible:
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enum:
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- aspeed,ast2600-fsi-master
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- aspeed,ast2700-fsi-master
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clocks:
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maxItems: 1
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cfam-reset-gpios:
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maxItems: 1
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description:
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Output GPIO pin for CFAM reset
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fsi-routing-gpios:
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maxItems: 1
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description:
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Output GPIO pin for setting the FSI mux (internal or cabled)
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fsi-mux-gpios:
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maxItems: 1
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description:
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Input GPIO pin for detecting the desired FSI mux state
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interrupts:
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maxItems: 1
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if:
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properties:
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compatible:
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contains:
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enum:
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- aspeed,ast2600-fsi-master
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then:
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properties:
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reg:
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maxItems: 1
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else:
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properties:
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reg:
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minItems: 1
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items:
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- description: OPB control registers
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- description: FSI controller registers
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- description: FSI link address space
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reg-names:
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items:
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- const: opb
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- const: ctrl
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- const: fsi
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required:
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- compatible
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- reg
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- clocks
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- interrupts
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allOf:
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- $ref: fsi-controller.yaml#
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/ast2600-clock.h>
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#include <dt-bindings/gpio/aspeed-gpio.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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fsi-master@1e79b000 {
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compatible = "aspeed,ast2600-fsi-master";
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reg = <0x1e79b000 0x94>;
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#address-cells = <2>;
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#size-cells = <0>;
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interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_fsi1_default>;
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clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;
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fsi-routing-gpios = <&gpio0 ASPEED_GPIO(Q, 7) GPIO_ACTIVE_HIGH>;
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fsi-mux-gpios = <&gpio0 ASPEED_GPIO(B, 0) GPIO_ACTIVE_HIGH>;
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cfam-reset-gpios = <&gpio0 ASPEED_GPIO(Q, 0) GPIO_ACTIVE_LOW>;
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cfam@0,0 {
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reg = <0 0>;
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#address-cells = <1>;
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#size-cells = <1>;
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chip-id = <0>;
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};
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};
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- |
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bus {
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#address-cells = <2>;
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#size-cells = <2>;
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fsi-master@21800000 {
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compatible = "aspeed,ast2700-fsi-master";
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reg = <0x0 0x21800000 0x0 0x100>,
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<0x0 0x21000000 0x0 0x1000>,
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<0x0 0x20000000 0x0 0x1000000>;
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reg-names = "opb", "ctrl", "fsi";
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#interrupt-cells = <1>;
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interrupt-controller;
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interrupts-extended = <&intc 6>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_fsi0_default>;
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clocks = <&syscon 40>;
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};
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};
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