[deliverable/linux.git] / arch / arm / mach-mediatek / mediatek.c

/*
 * 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,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,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
Commit	Line	Data
	1	/*
	2	* Device Tree support for Mediatek SoCs
	3	*
	4	* Copyright (c) 2014 MundoReader S.L.
	5	* Author: Matthias Brugger <matthias.bgg@gmail.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*/
	17	#include <linux/init.h>
	18	#include <asm/mach/arch.h>
	19	#include <linux/of.h>
	20	#include <linux/clk-provider.h>
	21	#include <linux/clocksource.h>
	22
	23
	24	#define GPT6_CON_MT65xx 0x10008060
	25	#define GPT_ENABLE 0x31
	26
	27	static void __init mediatek_timer_init(void)
	28	{
	29	void __iomem *gpt_base;
	30
	31	if (of_machine_is_compatible("mediatek,mt6589") \|\|
	32	of_machine_is_compatible("mediatek,mt8135") \|\|
	33	of_machine_is_compatible("mediatek,mt8127")) {
	34	/* turn on GPT6 which ungates arch timer clocks */
	35	gpt_base = ioremap(GPT6_CON_MT65xx, 0x04);
	36
	37	/* enable clock and set to free-run */
	38	writel(GPT_ENABLE, gpt_base);
	39	iounmap(gpt_base);
	40	}
	41
	42	of_clk_init(NULL);
	43	clocksource_probe();
	44	};
	45
	46	static const char * const mediatek_board_dt_compat[] = {
	47	"mediatek,mt2701",
	48	"mediatek,mt6589",
	49	"mediatek,mt6592",
	50	"mediatek,mt8127",
	51	"mediatek,mt8135",
	52	NULL,
	53	};
	54
	55	DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)")
	56	.dt_compat = mediatek_board_dt_compat,
	57	.init_time = mediatek_timer_init,
	58	MACHINE_END