arch/arm/mach-hisi/hisilicon.c

   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 <[email protected]>
   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