arch/arm/mach-tegra/board-dt.c

   1 /*
   2  * nVidia Tegra device tree board support
   3  *
   4  * Copyright (C) 2010 Secret Lab Technologies, Ltd.
   5  * Copyright (C) 2010 Google, Inc.
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  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
  18 #include <linux/kernel.h>
  19 #include <linux/init.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/serial_8250.h>
  22 #include <linux/clk.h>
  23 #include <linux/dma-mapping.h>
  24 #include <linux/irqdomain.h>
  25 #include <linux/of.h>
  26 #include <linux/of_address.h>
  27 #include <linux/of_fdt.h>
  28 #include <linux/of_irq.h>
  29 #include <linux/of_platform.h>
  30 #include <linux/pda_power.h>
  31 #include <linux/io.h>
  32 #include <linux/i2c.h>
  33 #include <linux/i2c-tegra.h>
  34
  35 #include <asm/hardware/gic.h>
  36 #include <asm/mach-types.h>
  37 #include <asm/mach/arch.h>
  38 #include <asm/mach/time.h>
  39 #include <asm/setup.h>
  40
  41 #include <mach/iomap.h>
  42 #include <mach/irqs.h>
  43
  44 #include "board.h"
  45 #include "board-harmony.h"
  46 #include "clock.h"
  47 #include "devices.h"
  48
  49 void harmony_pinmux_init(void);
  50 void seaboard_pinmux_init(void);
  51 void ventana_pinmux_init(void);
  52
  53 struct of_dev_auxdata tegra20_auxdata_lookup[] __initdata = {
  54         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC1_BASE, "sdhci-tegra.0", NULL),
  55         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC2_BASE, "sdhci-tegra.1", NULL),
  56         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC3_BASE, "sdhci-tegra.2", NULL),
  57         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC4_BASE, "sdhci-tegra.3", NULL),
  58         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C_BASE, "tegra-i2c.0", NULL),
  59         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C2_BASE, "tegra-i2c.1", NULL),
  60         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C3_BASE, "tegra-i2c.2", NULL),
  61         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_DVC_BASE, "tegra-i2c.3", NULL),
  62         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.0", NULL),
  63         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.1", NULL),
  64         OF_DEV_AUXDATA("nvidia,tegra20-das", TEGRA_APB_MISC_DAS_BASE, "tegra-das", NULL),
  65         {}
  66 };
  67
  68 static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
  69         /* name         parent          rate            enabled */
  70         { "uartd",      "pll_p",        216000000,      true },
  71         { NULL,         NULL,           0,              0},
  72 };
  73
  74 static struct of_device_id tegra_dt_match_table[] __initdata = {
  75         { .compatible = "simple-bus", },
  76         {}
  77 };
  78
  79 static struct of_device_id tegra_dt_gic_match[] __initdata = {
  80         { .compatible = "nvidia,tegra20-gic", },
  81         {}
  82 };
  83
  84 static struct {
  85         char *machine;
  86         void (*init)(void);
  87 } pinmux_configs[] = {
  88         { "nvidia,harmony", harmony_pinmux_init },
  89         { "nvidia,seaboard", seaboard_pinmux_init },
  90         { "nvidia,ventana", ventana_pinmux_init },
  91 };
  92
  93 static void __init tegra_dt_init(void)
  94 {
  95         struct device_node *node;
  96         int i;
  97
  98         node = of_find_matching_node_by_address(NULL, tegra_dt_gic_match,
  99                                                 TEGRA_ARM_INT_DIST_BASE);
 100         if (node)
 101                 irq_domain_add_simple(node, INT_GIC_BASE);
 102
 103         tegra_clk_init_from_table(tegra_dt_clk_init_table);
 104
 105         /*
 106          * Finished with the static registrations now; fill in the missing
 107          * devices
 108          */
 109         of_platform_populate(NULL, tegra_dt_match_table,
 110                                 tegra20_auxdata_lookup, NULL);
 111
 112         for (i = 0; i < ARRAY_SIZE(pinmux_configs); i++) {
 113                 if (of_machine_is_compatible(pinmux_configs[i].machine)) {
 114                         pinmux_configs[i].init();
 115                         break;
 116                 }
 117         }
 118
 119         WARN(i == ARRAY_SIZE(pinmux_configs),
 120                 "Unknown platform! Pinmuxing not initialized\n");
 121 }
 122
 123 static const char * tegra_dt_board_compat[] = {
 124         "nvidia,harmony",
 125         "nvidia,seaboard",
 126         "nvidia,ventana",
 127         NULL
 128 };
 129
 130 DT_MACHINE_START(TEGRA_DT, "nVidia Tegra (Flattened Device Tree)")
 131         .map_io         = tegra_map_common_io,
 132         .init_early     = tegra_init_early,
 133         .init_irq       = tegra_init_irq,
 134         .handle_irq     = gic_handle_irq,
 135         .timer          = &tegra_timer,
 136         .init_machine   = tegra_dt_init,
 137         .restart        = tegra_assert_system_reset,
 138         .dt_compat      = tegra_dt_board_compat,
 139 MACHINE_END