// SPDX-License-Identifier: GPL-2.0
/*
 * Device Tree support for Allwinner A1X SoCs
 *
 * Copyright (C) 2012 Maxime Ripard
 *
 * Maxime Ripard <maxime.ripard@free-electrons.com>
 *
 */

#include <linux/clocksource.h>
#include <linux/init.h>
#include <linux/of_clk.h>
#include <linux/platform_device.h>
#include <linux/of_platform.h>
#include <linux/reset/sunxi.h>
#include <linux/scpi_protocol.h>
#include <linux/suspend.h>

#include <asm/mach/arch.h>
#include <asm/secure_cntvoff.h>
#include <asm/suspend.h>

static const char * const sunxi_board_dt_compat[] = {
	"allwinner,sun4i-a10",
	"allwinner,sun5i-a10s",
	"allwinner,sun5i-a13",
	"allwinner,sun5i-r8",
	"nextthing,gr8",
	NULL,
};

DT_MACHINE_START(SUNXI_DT, "Allwinner sun4i/sun5i Families")
	.dt_compat	= sunxi_board_dt_compat,
MACHINE_END

static const char * const sun6i_board_dt_compat[] = {
	"allwinner,sun6i-a31",
	"allwinner,sun6i-a31s",
	NULL,
};

static void __init sun6i_timer_init(void)
{
	of_clk_init(NULL);
	if (IS_ENABLED(CONFIG_RESET_CONTROLLER))
		sun6i_reset_init();
	timer_probe();
}

DT_MACHINE_START(SUN6I_DT, "Allwinner sun6i (A31) Family")
	.init_time	= sun6i_timer_init,
	.dt_compat	= sun6i_board_dt_compat,
MACHINE_END

static const char * const sun7i_board_dt_compat[] = {
	"allwinner,sun7i-a20",
	NULL,
};

DT_MACHINE_START(SUN7I_DT, "Allwinner sun7i (A20) Family")
	.dt_compat	= sun7i_board_dt_compat,
MACHINE_END

static const char * const sun8i_board_dt_compat[] = {
	"allwinner,sun8i-a23",
	"allwinner,sun8i-a33",
	"allwinner,sun8i-h2-plus",
	"allwinner,sun8i-h3",
	"allwinner,sun8i-r40",
	"allwinner,sun8i-v3",
	"allwinner,sun8i-v3s",
	NULL,
};

DT_MACHINE_START(SUN8I_DT, "Allwinner sun8i Family")
	.init_time	= sun6i_timer_init,
	.dt_compat	= sun8i_board_dt_compat,
MACHINE_END

static void __init sun8i_a83t_cntvoff_init(void)
{
#ifdef CONFIG_SMP
	secure_cntvoff_init();
#endif
}

static const char * const sun8i_a83t_cntvoff_board_dt_compat[] = {
	"allwinner,sun8i-a83t",
	NULL,
};

#ifdef CONFIG_PM_SLEEP
static int sun8i_a83t_pm_valid(suspend_state_t state)
{
	return state == PM_SUSPEND_MEM;
}

static int sun8i_a83t_suspend_finish(unsigned long val)
{
	struct scpi_ops *scpi;

	scpi = get_scpi_ops();
	if (scpi && scpi->sys_set_power_state) {
		//HACK: use invalid state to mean: suspend last CPU and the system
		scpi->sys_set_power_state(3);
		cpu_do_idle();
	} else {
		// don't do much if scpi is not available
		cpu_do_idle();
	}

	return 0;
}

static int sun8i_a83t_pm_enter(suspend_state_t state)
{
	switch (state) {
	case PM_SUSPEND_MEM:
		cpu_suspend(0, sun8i_a83t_suspend_finish);
		break;
	default:
		return -EINVAL;
	}

	return 0;
}

static const struct platform_suspend_ops sun8i_a83t_pm_ops = {
	.enter = sun8i_a83t_pm_enter,
	.valid = sun8i_a83t_pm_valid,
};
#define SUN8I_A83T_PM_OPS &sun8i_a83t_pm_ops
#else
#define SUN8I_A83T_PM_OPS NULL
#endif

static void __init sun8i_a83t_init_machine(void)
{
	suspend_set_ops(SUN8I_A83T_PM_OPS);

	of_platform_default_populate(NULL, NULL, NULL);
}

DT_MACHINE_START(SUN8I_A83T_CNTVOFF_DT, "Allwinner A83t board")
	.init_early	= sun8i_a83t_cntvoff_init,
	.init_time	= sun6i_timer_init,
	.dt_compat	= sun8i_a83t_cntvoff_board_dt_compat,
	.init_machine	= sun8i_a83t_init_machine,
MACHINE_END

static const char * const sun9i_board_dt_compat[] = {
	"allwinner,sun9i-a80",
	NULL,
};

DT_MACHINE_START(SUN9I_DT, "Allwinner sun9i Family")
	.dt_compat	= sun9i_board_dt_compat,
MACHINE_END

static const char * const suniv_board_dt_compat[] = {
	"allwinner,suniv-f1c100s",
	NULL,
};

DT_MACHINE_START(SUNIV_DT, "Allwinner suniv Family")
	.dt_compat	= suniv_board_dt_compat,
MACHINE_END