| /* |
| * Device Tree support for Mediatek SoCs |
| * |
| * Copyright (c) 2014 MundoReader S.L. |
| * Author: Matthias Brugger <matthias.bgg@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| #include <linux/init.h> |
| #include <asm/mach/arch.h> |
| #include <linux/of.h> |
| #include <linux/clk-provider.h> |
| #include <linux/clocksource.h> |
| |
| |
| #define GPT6_CON_MT65xx 0x10008060 |
| #define GPT_ENABLE 0x31 |
| |
| static void __init mediatek_timer_init(void) |
| { |
| void __iomem *gpt_base; |
| |
| if (of_machine_is_compatible("mediatek,mt6589") || |
| of_machine_is_compatible("mediatek,mt7623") || |
| of_machine_is_compatible("mediatek,mt8135") || |
| of_machine_is_compatible("mediatek,mt8127")) { |
| /* turn on GPT6 which ungates arch timer clocks */ |
| gpt_base = ioremap(GPT6_CON_MT65xx, 0x04); |
| |
| /* enable clock and set to free-run */ |
| writel(GPT_ENABLE, gpt_base); |
| iounmap(gpt_base); |
| } |
| |
| of_clk_init(NULL); |
| clocksource_probe(); |
| }; |
| |
| static const char * const mediatek_board_dt_compat[] = { |
| "mediatek,mt2701", |
| "mediatek,mt6589", |
| "mediatek,mt6592", |
| "mediatek,mt7623", |
| "mediatek,mt8127", |
| "mediatek,mt8135", |
| NULL, |
| }; |
| |
| DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)") |
| .dt_compat = mediatek_board_dt_compat, |
| .init_time = mediatek_timer_init, |
| MACHINE_END |
