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-pinmux", TEGRA_APB_MISC_BASE + 0x14, "tegra-pinmux", NULL),
  55         OF_DEV_AUXDATA("nvidia,tegra20-gpio", TEGRA_GPIO_BASE, "tegra-gpio", NULL),
  56         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC1_BASE, "sdhci-tegra.0", NULL),
  57         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC2_BASE, "sdhci-tegra.1", NULL),
  58         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC3_BASE, "sdhci-tegra.2", NULL),
  59         OF_DEV_AUXDATA("nvidia,tegra20-sdhci", TEGRA_SDMMC4_BASE, "sdhci-tegra.3", NULL),
  60         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C_BASE, "tegra-i2c.0", NULL),
  61         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C2_BASE, "tegra-i2c.1", NULL),
  62         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_I2C3_BASE, "tegra-i2c.2", NULL),
  63         OF_DEV_AUXDATA("nvidia,tegra20-i2c", TEGRA_DVC_BASE, "tegra-i2c.3", NULL),
  64         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.0", NULL),
  65         OF_DEV_AUXDATA("nvidia,tegra20-i2s", TEGRA_I2S1_BASE, "tegra-i2s.1", NULL),
  66         OF_DEV_AUXDATA("nvidia,tegra20-das", TEGRA_APB_MISC_DAS_BASE, "tegra-das", NULL),
  67         {}
  68 };
  69
  70 static __initdata struct tegra_clk_init_table tegra_dt_clk_init_table[] = {
  71         /* name         parent          rate            enabled */
  72         { "uartd",      "pll_p",        216000000,      true },
  73         { NULL,         NULL,           0,              0},
  74 };
  75
  76 static struct of_device_id tegra_dt_match_table[] __initdata = {
  77         { .compatible = "simple-bus", },
  78         {}
  79 };
  80
  81 static struct of_device_id tegra_dt_gic_match[] __initdata = {
  82         { .compatible = "nvidia,tegra20-gic", },
  83         {}
  84 };
  85
  86 static struct {
  87         char *machine;
  88         void (*init)(void);
  89 } pinmux_configs[] = {
  90         { "nvidia,harmony", harmony_pinmux_init },
  91         { "nvidia,seaboard", seaboard_pinmux_init },
  92         { "nvidia,ventana", ventana_pinmux_init },
  93 };
  94
  95 static void __init tegra_dt_init(void)
  96 {
  97         struct device_node *node;
  98         int i;
  99
 100         node = of_find_matching_node_by_address(NULL, tegra_dt_gic_match,
 101                                                 TEGRA_ARM_INT_DIST_BASE);
 102         if (node)
 103                 irq_domain_add_simple(node, INT_GIC_BASE);
 104
 105         tegra_clk_init_from_table(tegra_dt_clk_init_table);
 106
 107         for (i = 0; i < ARRAY_SIZE(pinmux_configs); i++) {
 108                 if (of_machine_is_compatible(pinmux_configs[i].machine)) {
 109                         pinmux_configs[i].init();
 110                         break;
 111                 }
 112         }
 113
 114         WARN(i == ARRAY_SIZE(pinmux_configs),
 115                 "Unknown platform! Pinmuxing not initialized\n");
 116
 117         /*
 118          * Finished with the static registrations now; fill in the missing
 119          * devices
 120          */
 121         of_platform_populate(NULL, tegra_dt_match_table,
 122                                 tegra20_auxdata_lookup, NULL);
 123 }
 124
 125 static const char * tegra_dt_board_compat[] = {
 126         "nvidia,harmony",
 127         "nvidia,seaboard",
 128         "nvidia,ventana",
 129         NULL
 130 };
 131
 132 DT_MACHINE_START(TEGRA_DT, "nVidia Tegra (Flattened Device Tree)")
 133         .map_io         = tegra_map_common_io,
 134         .init_early     = tegra_init_early,
 135         .init_irq       = tegra_init_irq,
 136         .handle_irq     = gic_handle_irq,
 137         .timer          = &tegra_timer,
 138         .init_machine   = tegra_dt_init,
 139         .dt_compat      = tegra_dt_board_compat,
 140 MACHINE_END