1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * (HiSilicon's SoC based) flattened device tree enabled machine
4  *
5  * Copyright (c) 2012-2013 HiSilicon Ltd.
6  * Copyright (c) 2012-2013 Linaro Ltd.
7  *
8  * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
9 */
10 
11 #include <linux/clocksource.h>
12 #include <linux/irqchip.h>
13 
14 #include <asm/mach/arch.h>
15 #include <asm/mach/map.h>
16 
17 #define HI3620_SYSCTRL_PHYS_BASE		0xfc802000
18 #define HI3620_SYSCTRL_VIRT_BASE		0xfe802000
19 
20 /*
21  * This table is only for optimization. Since ioremap() could always share
22  * the same mapping if it's defined as static IO mapping.
23  *
24  * Without this table, system could also work. The cost is some virtual address
25  * spaces wasted since ioremap() may be called multi times for the same
26  * IO space.
27  */
28 static struct map_desc hi3620_io_desc[] __initdata = {
29 	{
30 		/* sysctrl */
31 		.pfn		= __phys_to_pfn(HI3620_SYSCTRL_PHYS_BASE),
32 		.virtual	= HI3620_SYSCTRL_VIRT_BASE,
33 		.length		= 0x1000,
34 		.type		= MT_DEVICE,
35 	},
36 };
37 
hi3620_map_io(void)38 static void __init hi3620_map_io(void)
39 {
40 	debug_ll_io_init();
41 	iotable_init(hi3620_io_desc, ARRAY_SIZE(hi3620_io_desc));
42 }
43 
44 static const char *const hi3xxx_compat[] __initconst = {
45 	"hisilicon,hi3620-hi4511",
46 	NULL,
47 };
48 
49 DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
50 	.map_io		= hi3620_map_io,
51 	.dt_compat	= hi3xxx_compat,
52 MACHINE_END
53