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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/peci/peci-npcm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Nuvoton NPCM PECI Bus Device Tree Bindings
maintainers:
- Tomer Maimon <tmaimon77@gmail.com>
properties:
compatible:
const: nuvoton,npcm750-peci # for the NPCM7XX BMC.
reg:
maxItems: 1
"#address-cells":
# Required to define a client address.
const: 1
"#size-cells":
# Required to define a client address.
const: 0
interrupts:
maxItems: 1
clocks:
# PECI reference clock.
maxItems: 1
cmd-timeout-ms:
# Command timeout in units of ms.
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
- minimum: 1
maximum: 60000
default: 1000
pull-down:
description: |
Defines the PECI I/O internal pull down operation.
0: pull down always enable
1: pull down only during transactions.
2: pull down always disable.
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
- minimum: 0
maximum: 2
default: 0
host-neg-bit-rate:
description: |
Define host negotiation bit rate divider.
the host negotiation bit rate calculate with formula:
clock frequency[Hz] / [4 x {host-neg-bit-rate + 1}]
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
- minimum: 7
maximum: 31
default: 15
high-volt-range:
description: |
Adapts PECI I/O interface to voltage range.
0: PECI I/O interface voltage range of 0.8-1.06V (default)
1: PECI I/O interface voltage range of 0.95-1.26V
type: boolean
required:
- compatible
- reg
- "#address-cells"
- "#size-cells"
- interrupts
- clocks
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
peci: bus@100000 {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x100000 0x200>;
peci0: peci-bus@0 {
compatible = "nuvoton,npcm750-peci";
reg = <0x0 0x200>;
#address-cells = <1>;
#size-cells = <0>;
interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clk NPCM7XX_CLK_APB3>;
cmd-timeout-ms = <1000>;
pull-down = <0>;
host-neg-bit-rate = <15>;
};
};
...
|
