162306a36Sopenharmony_ci# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 262306a36Sopenharmony_ci%YAML 1.2 362306a36Sopenharmony_ci--- 462306a36Sopenharmony_ci$id: http://devicetree.org/schemas/clock/ti,sci-clk.yaml# 562306a36Sopenharmony_ci$schema: http://devicetree.org/meta-schemas/core.yaml# 662306a36Sopenharmony_ci 762306a36Sopenharmony_cititle: TI-SCI clock controller 862306a36Sopenharmony_ci 962306a36Sopenharmony_cimaintainers: 1062306a36Sopenharmony_ci - Nishanth Menon <nm@ti.com> 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_cidescription: | 1362306a36Sopenharmony_ci Some TI SoCs contain a system controller (like the Power Management Micro 1462306a36Sopenharmony_ci Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling 1562306a36Sopenharmony_ci the state of the various hardware modules present on the SoC. Communication 1662306a36Sopenharmony_ci between the host processor running an OS and the system controller happens 1762306a36Sopenharmony_ci through a protocol called TI System Control Interface (TI-SCI protocol). 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_ci This clock controller node uses the TI SCI protocol to perform various clock 2062306a36Sopenharmony_ci management of various hardware modules (devices) present on the SoC. This 2162306a36Sopenharmony_ci node must be a child node of the associated TI-SCI system controller node. 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ciproperties: 2462306a36Sopenharmony_ci $nodename: 2562306a36Sopenharmony_ci pattern: "^clock-controller$" 2662306a36Sopenharmony_ci 2762306a36Sopenharmony_ci compatible: 2862306a36Sopenharmony_ci const: ti,k2g-sci-clk 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci "#clock-cells": 3162306a36Sopenharmony_ci const: 2 3262306a36Sopenharmony_ci description: 3362306a36Sopenharmony_ci The two cells represent values that the TI-SCI controller defines. 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci The first cell should contain the device ID. 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci The second cell should contain the clock ID. 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci Please see http://processors.wiki.ti.com/index.php/TISCI for 4062306a36Sopenharmony_ci protocol documentation for the values to be used for different devices. 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ciadditionalProperties: false 4362306a36Sopenharmony_ci 4462306a36Sopenharmony_ciexamples: 4562306a36Sopenharmony_ci - | 4662306a36Sopenharmony_ci k3_clks: clock-controller { 4762306a36Sopenharmony_ci compatible = "ti,k2g-sci-clk"; 4862306a36Sopenharmony_ci #clock-cells = <2>; 4962306a36Sopenharmony_ci }; 50