arch/arm/mach-sunxi/sunxi.c

Source file repositories/reference/linux-study-clean/arch/arm/mach-sunxi/sunxi.c

File Facts

System
Linux kernel
Corpus path
arch/arm/mach-sunxi/sunxi.c
Extension
.c
Size
2447 bytes
Lines
112
Domain
Architecture Layer
Bucket
arch/arm
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// 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/reset/sunxi.h>

#include <asm/mach/arch.h>
#include <asm/secure_cntvoff.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,
};

DT_MACHINE_START(SUN8I_A83T_CNTVOFF_DT, "Allwinner A83t board")
	.init_early	= sun8i_a83t_cntvoff_init,

Annotation

Implementation Notes