arch/arm/mach-shmobile/board-kzm9g-reference.c

   1 /*
   2  * KZM-A9-GT board support - Reference Device Tree Implementation
   3  *
   4  * Copyright (C) 2012   Horms Solutions Ltd.
   5  *
   6  * Based on board-kzm9g.c
   7  * Copyright (C) 2012   Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
   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 as published by
  11  * the Free Software Foundation; version 2 of the License.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  21  */
  22
  23 #include <linux/delay.h>
  24 #include <linux/gpio.h>
  25 #include <linux/io.h>
  26 #include <linux/irq.h>
  27 #include <linux/irqchip.h>
  28 #include <linux/input.h>
  29 #include <linux/of_platform.h>
  30 #include <linux/pinctrl/machine.h>
  31 #include <mach/sh73a0.h>
  32 #include <mach/common.h>
  33 #include <asm/hardware/cache-l2x0.h>
  34 #include <asm/mach-types.h>
  35 #include <asm/mach/arch.h>
  36
  37 static const struct pinctrl_map kzm_pinctrl_map[] = {
  38         PIN_MAP_MUX_GROUP_DEFAULT("i2c-sh_mobile.3", "pfc-sh73a0",
  39                                   "i2c3_1", "i2c3"),
  40         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.4", "pfc-sh73a0",
  41                                   "scifa4_data", "scifa4"),
  42         PIN_MAP_MUX_GROUP_DEFAULT("sh-sci.4", "pfc-sh73a0",
  43                                   "scifa4_ctrl", "scifa4"),
  44 };
  45
  46 static void __init kzm_init(void)
  47 {
  48         sh73a0_add_standard_devices_dt();
  49         pinctrl_register_mappings(kzm_pinctrl_map, ARRAY_SIZE(kzm_pinctrl_map));
  50
  51 #ifdef CONFIG_CACHE_L2X0
  52         /* Early BRESP enable, Shared attribute override enable, 64K*8way */
  53         l2x0_init(IOMEM(0xf0100000), 0x40460000, 0x82000fff);
  54 #endif
  55 }
  56
  57 static void kzm9g_restart(char mode, const char *cmd)
  58 {
  59 #define RESCNT2 IOMEM(0xe6188020)
  60         /* Do soft power on reset */
  61         writel((1 << 31), RESCNT2);
  62 }
  63
  64 static const char *kzm9g_boards_compat_dt[] __initdata = {
  65         "renesas,kzm9g-reference",
  66         NULL,
  67 };
  68
  69 /* Please note that the clock initialisation shcheme used in
  70  * sh73a0_add_early_devices_dt() and sh73a0_add_standard_devices_dt()
  71  * does not work with SMP as there is a yet to be resolved lock-up in
  72  * workqueue initialisation.
  73  *
  74  * CONFIG_SMP should be disabled when using this code.
  75  */
  76 DT_MACHINE_START(KZM9G_DT, "kzm9g-reference")
  77         .smp            = smp_ops(sh73a0_smp_ops),
  78         .map_io         = sh73a0_map_io,
  79         .init_early     = sh73a0_init_delay,
  80         .nr_irqs        = NR_IRQS_LEGACY,
  81         .init_irq       = irqchip_init,
  82         .init_machine   = kzm_init,
  83         .init_late      = shmobile_init_late,
  84         .init_time      = shmobile_timer_init,
  85         .restart        = kzm9g_restart,
  86         .dt_compat      = kzm9g_boards_compat_dt,
  87 MACHINE_END