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/*
* 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,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
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