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 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