mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
601bac7638
GPT6 needs to be enabled on MT7623 for the arch timer to work. Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
61 lines
1.7 KiB
C
61 lines
1.7 KiB
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,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
|