LXR linux/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 <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 */
  28static 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
  38static 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
  44static const char *const hi3xxx_compat[] __initconst = {
  45        "hisilicon,hi3620-hi4511",
  46        NULL,
  47};
  48
  49DT_MACHINE_START(HI3620, "Hisilicon Hi3620 (Flattened Device Tree)")
  50        .map_io         = hi3620_map_io,
  51        .dt_compat      = hi3xxx_compat,
  52MACHINE_END
  53