ark1668ed-bsp/linux/arch/arm/mach-rockchip/rockchip.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Device Tree support for Rockchip SoCs
 *
 * Copyright (c) 2013 MundoReader S.L.
 * Author: Heiko Stuebner <heiko@sntech.de>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_clk.h>
#include <linux/clocksource.h>
#include <asm/mach/arch.h>
#include <asm/mach/map.h>
#include "core.h"
#include "pm.h"

#define RK3288_TIMER6_7_PHYS 0xff810000

static void __init rockchip_timer_init(void)
{
	if (of_machine_is_compatible("rockchip,rk3288")) {
		void __iomem *reg_base;

		/*
		 * Most/all uboot versions for rk3288 don't enable timer7
		 * which is needed for the architected timer to work.
		 * So make sure it is running during early boot.
		 */
		reg_base = ioremap(RK3288_TIMER6_7_PHYS, SZ_16K);
		if (reg_base) {
			writel(0, reg_base + 0x30);
			writel(0xffffffff, reg_base + 0x20);
			writel(0xffffffff, reg_base + 0x24);
			writel(1, reg_base + 0x30);
			dsb();
			iounmap(reg_base);
		} else {
			pr_err("rockchip: could not map timer7 registers\n");
		}
	}

	of_clk_init(NULL);
	timer_probe();
}

static void __init rockchip_dt_init(void)
{
	rockchip_suspend_init();
}

static const char * const rockchip_board_dt_compat[] = {
	"rockchip,rk2928",
	"rockchip,rk3066a",
	"rockchip,rk3066b",
	"rockchip,rk3188",
	"rockchip,rk3228",
	"rockchip,rk3288",
	"rockchip,rv1108",
	NULL,
};

DT_MACHINE_START(ROCKCHIP_DT, "Rockchip (Device Tree)")
	.l2c_aux_val	= 0,
	.l2c_aux_mask	= ~0,
	.init_time	= rockchip_timer_init,
	.dt_compat	= rockchip_board_dt_compat,
	.init_machine	= rockchip_dt_init,
MACHINE_END