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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/soc/cirrus/cirrus,ep9301-syscon.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Cirrus Logic EP93xx Platforms System Controller
maintainers:
- Alexander Sverdlin <alexander.sverdlin@gmail.com>
- Nikita Shubin <nikita.shubin@maquefel.me>
description: |
Central resources are controlled by a set of software-locked registers,
which can be used to prevent accidental accesses. Syscon generates
the various bus and peripheral clocks and controls the system startup
configuration.
The System Controller (Syscon) provides:
- Clock control
- Power management
- System configuration management
Syscon registers are common for all EP93xx SoC's, through some actual peripheral
may be missing depending on actual SoC model.
properties:
compatible:
oneOf:
- items:
- enum:
- cirrus,ep9302-syscon
- cirrus,ep9307-syscon
- cirrus,ep9312-syscon
- cirrus,ep9315-syscon
- const: cirrus,ep9301-syscon
- const: syscon
- items:
- const: cirrus,ep9301-syscon
- const: syscon
reg:
maxItems: 1
"#clock-cells":
const: 1
clocks:
items:
- description: reference clock
patternProperties:
'^pins-':
type: object
description: pin node
$ref: /schemas/pinctrl/pinmux-node.yaml
properties:
function:
enum: [ spi, ac97, i2s, pwm, keypad, pata, lcd, gpio ]
groups:
enum: [ ssp, ac97, i2s_on_ssp, i2s_on_ac97, pwm1, gpio1agrp,
gpio2agrp, gpio3agrp, gpio4agrp, gpio6agrp, gpio7agrp,
rasteronsdram0grp, rasteronsdram3grp, keypadgrp, idegrp ]
required:
- function
- groups
unevaluatedProperties: false
required:
- compatible
- reg
- "#clock-cells"
- clocks
additionalProperties: false
examples:
- |
syscon@80930000 {
compatible = "cirrus,ep9301-syscon", "syscon";
reg = <0x80930000 0x1000>;
#clock-cells = <1>;
clocks = <&xtali>;
spi_default_pins: pins-spi {
function = "spi";
groups = "ssp";
};
};
|
