arch/arm/mach-hisi/hisilicon.c

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