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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/clock/img,pistachio-clk.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Imagination Technologies Pistachio SoC clock controllers
maintainers:
- Andrew Bresticker <abrestic@chromium.org>
description: |
Pistachio has four clock controllers (core clock, peripheral clock, peripheral
general control, and top general control) which are instantiated individually
from the device-tree.
Core clock controller:
The core clock controller generates clocks for the CPU, RPU (WiFi + BT
co-processor), audio, and several peripherals.
Peripheral clock controller:
The peripheral clock controller generates clocks for the DDR, ROM, and other
peripherals. The peripheral system clock ("periph_sys") generated by the core
clock controller is the input clock to the peripheral clock controller.
Peripheral general control:
The peripheral general control block generates system interface clocks and
resets for various peripherals. It also contains miscellaneous peripheral
control registers.
Top-level general control:
The top-level general control block contains miscellaneous control registers
and gates for the external clocks "audio_clk_in" and "enet_clk_in".
properties:
compatible:
items:
- enum:
- img,pistachio-clk
- img,pistachio-clk-periph
- img,pistachio-cr-periph
- img,pistachio-cr-top
reg:
maxItems: 1
'#clock-cells':
const: 1
clocks:
minItems: 1
maxItems: 3
clock-names:
minItems: 1
maxItems: 3
required:
- compatible
- reg
- '#clock-cells'
- clocks
- clock-names
allOf:
- if:
properties:
compatible:
contains:
const: img,pistachio-clk
then:
properties:
clocks:
items:
- description: External 52Mhz oscillator
- description: Alternate audio reference clock
- description: Alternate ethernet PHY clock
clock-names:
items:
- const: xtal
- const: audio_refclk_ext_gate
- const: ext_enet_in_gate
- if:
properties:
compatible:
contains:
const: img,pistachio-clk-periph
then:
properties:
clocks:
items:
- description: Peripheral system clock
clock-names:
items:
- const: periph_sys_core
- if:
properties:
compatible:
contains:
const: img,pistachio-cr-periph
then:
properties:
clocks:
items:
- description: System interface clock
clock-names:
items:
- const: sys
- if:
properties:
compatible:
contains:
const: img,pistachio-cr-top
then:
properties:
clocks:
items:
- description: External audio reference clock
- description: External ethernet PHY clock
clock-names:
items:
- const: audio_clk_in
- const: enet_clk_in
additionalProperties: false
|
