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