arch/arm/mach-rockchip/rk3036.c

   1 /*
   2  * Device Tree support for Rockchip RK3036
   3  *
   4  * Copyright (C) 2014 ROCKCHIP, Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/clk-provider.h>
  18 #include <linux/clocksource.h>
  19 #include <linux/cpuidle.h>
  20 #include <linux/delay.h>
  21 #include <linux/init.h>
  22 #include <linux/irqchip.h>
  23 #include <linux/kernel.h>
  24 #include <linux/of_address.h>
  25 #include <linux/of_platform.h>
  26 #include <linux/rockchip/common.h>
  27 #include <linux/rockchip/cpu.h>
  28 #include <linux/rockchip/cru.h>
  29 #include <linux/rockchip/dvfs.h>
  30 #include <linux/rockchip/grf.h>
  31 #include <linux/rockchip/iomap.h>
  32 #include <linux/rockchip/pmu.h>
  33 #include <asm/cpuidle.h>
  34 #include <asm/cputype.h>
  35 #include <asm/mach/arch.h>
  36 #include <asm/mach/map.h>
  37 #include "cpu_axi.h"
  38 #include "loader.h"
  39 #define CPU 3036
  40 #include "sram.h"
  41 #include "pm.h"
  42
  43 #define RK3036_DEVICE(name) \
  44         { \
  45                 .virtual        = (unsigned long) RK_##name##_VIRT, \
  46                 .pfn            = __phys_to_pfn(RK3036_##name##_PHYS), \
  47                 .length         = RK3036_##name##_SIZE, \
  48                 .type           = MT_DEVICE, \
  49         }
  50
  51
  52 #define RK3036_TIMER5_VIRT (RK_TIMER_VIRT + 0xa0)
  53
  54 static const char * const rk3036_dt_compat[] __initconst = {
  55         "rockchip,rk3036",
  56         NULL,
  57 };
  58
  59 static struct map_desc rk3036_io_desc[] __initdata = {
  60         RK3036_DEVICE(TIMER),
  61 };
  62
  63 static void __init rk3036_dt_map_io(void)
  64 {
  65         rockchip_soc_id = ROCKCHIP_SOC_RK3036;
  66
  67         iotable_init(rk3036_io_desc, ARRAY_SIZE(rk3036_io_desc));
  68
  69         /* enable timer5 for core */
  70         writel_relaxed(0, RK3036_TIMER5_VIRT + 0x10);
  71         dsb();
  72         writel_relaxed(0xFFFFFFFF, RK3036_TIMER5_VIRT + 0x00);
  73         writel_relaxed(0xFFFFFFFF, RK3036_TIMER5_VIRT + 0x04);
  74         dsb();
  75         writel_relaxed(1, RK3036_TIMER5_VIRT + 0x10);
  76         dsb();
  77 }
  78
  79 static void __init rk3036_dt_init_timer(void)
  80 {
  81         clocksource_of_init();
  82 }
  83
  84 static void __init rk3036_reserve(void)
  85 {
  86 }
  87
  88 static void __init rk3036_init_late(void)
  89 {
  90 }
  91
  92 static void rk3036_restart(char mode, const char *cmd)
  93 {
  94 }
  95
  96 DT_MACHINE_START(RK3036_DT, "Rockchip RK3036")
  97         .dt_compat      = rk3036_dt_compat,
  98         .smp            = smp_ops(rockchip_smp_ops),
  99         .reserve        = rk3036_reserve,
 100         .map_io         = rk3036_dt_map_io,
 101         .init_time      = rk3036_dt_init_timer,
 102         .init_late      = rk3036_init_late,
 103         .restart        = rk3036_restart,
 104 MACHINE_END