arch/arm/mach-tegra/tegra.c

   1 /*
   2  * NVIDIA Tegra SoC device tree board support
   3  *
   4  * Copyright (C) 2011, 2013, NVIDIA Corporation
   5  * Copyright (C) 2010 Secret Lab Technologies, Ltd.
   6  * Copyright (C) 2010 Google, Inc.
   7  *
   8  * This software is licensed under the terms of the GNU General Public
   9  * License version 2, as published by the Free Software Foundation, and
  10  * may be copied, distributed, and modified under those terms.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  */
  18
  19 #include <linux/clocksource.h>
  20 #include <linux/kernel.h>
  21 #include <linux/init.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/serial_8250.h>
  24 #include <linux/clk.h>
  25 #include <linux/dma-mapping.h>
  26 #include <linux/irqdomain.h>
  27 #include <linux/of.h>
  28 #include <linux/of_address.h>
  29 #include <linux/of_fdt.h>
  30 #include <linux/of_platform.h>
  31 #include <linux/pda_power.h>
  32 #include <linux/io.h>
  33 #include <linux/slab.h>
  34 #include <linux/sys_soc.h>
  35 #include <linux/usb/tegra_usb_phy.h>
  36 #include <linux/clk/tegra.h>
  37
  38 #include <asm/mach-types.h>
  39 #include <asm/mach/arch.h>
  40 #include <asm/mach/time.h>
  41 #include <asm/setup.h>
  42
  43 #include "board.h"
  44 #include "common.h"
  45 #include "fuse.h"
  46 #include "iomap.h"
  47
  48 static void __init tegra_dt_init(void)
  49 {
  50         struct soc_device_attribute *soc_dev_attr;
  51         struct soc_device *soc_dev;
  52         struct device *parent = NULL;
  53
  54         tegra_clocks_apply_init_table();
  55
  56         soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
  57         if (!soc_dev_attr)
  58                 goto out;
  59
  60         soc_dev_attr->family = kasprintf(GFP_KERNEL, "Tegra");
  61         soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d", tegra_revision);
  62         soc_dev_attr->soc_id = kasprintf(GFP_KERNEL, "%d", tegra_chip_id);
  63
  64         soc_dev = soc_device_register(soc_dev_attr);
  65         if (IS_ERR(soc_dev)) {
  66                 kfree(soc_dev_attr->family);
  67                 kfree(soc_dev_attr->revision);
  68                 kfree(soc_dev_attr->soc_id);
  69                 kfree(soc_dev_attr);
  70                 goto out;
  71         }
  72
  73         parent = soc_device_to_device(soc_dev);
  74
  75         /*
  76          * Finished with the static registrations now; fill in the missing
  77          * devices
  78          */
  79 out:
  80         of_platform_populate(NULL, of_default_bus_match_table, NULL, parent);
  81 }
  82
  83 static void __init paz00_init(void)
  84 {
  85         if (IS_ENABLED(CONFIG_ARCH_TEGRA_2x_SOC))
  86                 tegra_paz00_wifikill_init();
  87 }
  88
  89 static struct {
  90         char *machine;
  91         void (*init)(void);
  92 } board_init_funcs[] = {
  93         { "compal,paz00", paz00_init },
  94 };
  95
  96 static void __init tegra_dt_init_late(void)
  97 {
  98         int i;
  99
 100         tegra_init_late();
 101
 102         for (i = 0; i < ARRAY_SIZE(board_init_funcs); i++) {
 103                 if (of_machine_is_compatible(board_init_funcs[i].machine)) {
 104                         board_init_funcs[i].init();
 105                         break;
 106                 }
 107         }
 108 }
 109
 110 static const char * const tegra_dt_board_compat[] = {
 111         "nvidia,tegra114",
 112         "nvidia,tegra30",
 113         "nvidia,tegra20",
 114         NULL
 115 };
 116
 117 DT_MACHINE_START(TEGRA_DT, "NVIDIA Tegra SoC (Flattened Device Tree)")
 118         .map_io         = tegra_map_common_io,
 119         .smp            = smp_ops(tegra_smp_ops),
 120         .init_early     = tegra_init_early,
 121         .init_irq       = tegra_dt_init_irq,
 122         .init_time      = clocksource_of_init,
 123         .init_machine   = tegra_dt_init,
 124         .init_late      = tegra_dt_init_late,
 125         .restart        = tegra_assert_system_reset,
 126         .dt_compat      = tegra_dt_board_compat,
 127 MACHINE_END