162306a36Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-or-later 262306a36Sopenharmony_ci/* 362306a36Sopenharmony_ci * Device Tree support for Mediatek SoCs 462306a36Sopenharmony_ci * 562306a36Sopenharmony_ci * Copyright (c) 2014 MundoReader S.L. 662306a36Sopenharmony_ci * Author: Matthias Brugger <matthias.bgg@gmail.com> 762306a36Sopenharmony_ci */ 862306a36Sopenharmony_ci#include <linux/init.h> 962306a36Sopenharmony_ci#include <linux/io.h> 1062306a36Sopenharmony_ci#include <asm/mach/arch.h> 1162306a36Sopenharmony_ci#include <linux/of.h> 1262306a36Sopenharmony_ci#include <linux/of_clk.h> 1362306a36Sopenharmony_ci#include <linux/clocksource.h> 1462306a36Sopenharmony_ci 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ci#define GPT6_CON_MT65xx 0x10008060 1762306a36Sopenharmony_ci#define GPT_ENABLE 0x31 1862306a36Sopenharmony_ci 1962306a36Sopenharmony_cistatic void __init mediatek_timer_init(void) 2062306a36Sopenharmony_ci{ 2162306a36Sopenharmony_ci void __iomem *gpt_base; 2262306a36Sopenharmony_ci 2362306a36Sopenharmony_ci if (of_machine_is_compatible("mediatek,mt6589") || 2462306a36Sopenharmony_ci of_machine_is_compatible("mediatek,mt7623") || 2562306a36Sopenharmony_ci of_machine_is_compatible("mediatek,mt8135") || 2662306a36Sopenharmony_ci of_machine_is_compatible("mediatek,mt8127")) { 2762306a36Sopenharmony_ci /* turn on GPT6 which ungates arch timer clocks */ 2862306a36Sopenharmony_ci gpt_base = ioremap(GPT6_CON_MT65xx, 0x04); 2962306a36Sopenharmony_ci 3062306a36Sopenharmony_ci /* enable clock and set to free-run */ 3162306a36Sopenharmony_ci writel(GPT_ENABLE, gpt_base); 3262306a36Sopenharmony_ci iounmap(gpt_base); 3362306a36Sopenharmony_ci } 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci of_clk_init(NULL); 3662306a36Sopenharmony_ci timer_probe(); 3762306a36Sopenharmony_ci}; 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_cistatic const char * const mediatek_board_dt_compat[] = { 4062306a36Sopenharmony_ci "mediatek,mt2701", 4162306a36Sopenharmony_ci "mediatek,mt6589", 4262306a36Sopenharmony_ci "mediatek,mt6592", 4362306a36Sopenharmony_ci "mediatek,mt7623", 4462306a36Sopenharmony_ci "mediatek,mt7629", 4562306a36Sopenharmony_ci "mediatek,mt8127", 4662306a36Sopenharmony_ci "mediatek,mt8135", 4762306a36Sopenharmony_ci NULL, 4862306a36Sopenharmony_ci}; 4962306a36Sopenharmony_ci 5062306a36Sopenharmony_ciDT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)") 5162306a36Sopenharmony_ci .dt_compat = mediatek_board_dt_compat, 5262306a36Sopenharmony_ci .init_time = mediatek_timer_init, 5362306a36Sopenharmony_ciMACHINE_END 54