arch/arm/mach-imx/mach-mx31ads.c

   1 /*
   2  *  Copyright (C) 2000 Deep Blue Solutions Ltd
   3  *  Copyright (C) 2002 Shane Nay (shane@minirl.com)
   4  *  Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
   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/types.h>
  18 #include <linux/init.h>
  19 #include <linux/clk.h>
  20 #include <linux/serial_8250.h>
  21 #include <linux/gpio.h>
  22 #include <linux/i2c.h>
  23 #include <linux/irq.h>
  24 #include <linux/irqdomain.h>
  25
  26 #include <asm/mach-types.h>
  27 #include <asm/mach/arch.h>
  28 #include <asm/mach/time.h>
  29 #include <asm/memory.h>
  30 #include <asm/mach/map.h>
  31
  32 #ifdef CONFIG_MACH_MX31ADS_WM1133_EV1
  33 #include <linux/mfd/wm8350/audio.h>
  34 #include <linux/mfd/wm8350/core.h>
  35 #include <linux/mfd/wm8350/pmic.h>
  36 #endif
  37
  38 #include "common.h"
  39 #include "devices-imx31.h"
  40 #include "hardware.h"
  41 #include "iomux-mx3.h"
  42
  43 /* Base address of PBC controller */
  44 #define PBC_BASE_ADDRESS        MX31_CS4_BASE_ADDR_VIRT
  45
  46 /* PBC Board interrupt status register */
  47 #define PBC_INTSTATUS           0x000016
  48
  49 /* PBC Board interrupt current status register */
  50 #define PBC_INTCURR_STATUS      0x000018
  51
  52 /* PBC Interrupt mask register set address */
  53 #define PBC_INTMASK_SET         0x00001A
  54
  55 /* PBC Interrupt mask register clear address */
  56 #define PBC_INTMASK_CLEAR       0x00001C
  57
  58 /* External UART A */
  59 #define PBC_SC16C652_UARTA      0x010000
  60
  61 /* External UART B */
  62 #define PBC_SC16C652_UARTB      0x010010
  63
  64 #define PBC_INTSTATUS_REG       (PBC_INTSTATUS + PBC_BASE_ADDRESS)
  65 #define PBC_INTMASK_SET_REG     (PBC_INTMASK_SET + PBC_BASE_ADDRESS)
  66 #define PBC_INTMASK_CLEAR_REG   (PBC_INTMASK_CLEAR + PBC_BASE_ADDRESS)
  67
  68 #define EXPIO_INT_XUART_INTA    10
  69 #define EXPIO_INT_XUART_INTB    11
  70
  71 #define MXC_MAX_EXP_IO_LINES    16
  72
  73 /* CS8900 */
  74 #define EXPIO_INT_ENET_INT      8
  75 #define CS4_CS8900_MMIO_START   0x20000
  76
  77 static struct irq_domain *domain;
  78
  79 /*
  80  * The serial port definition structure.
  81  */
  82 static struct plat_serial8250_port serial_platform_data[] = {
  83         {
  84                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTA),
  85                 .mapbase  = (unsigned long)(MX31_CS4_BASE_ADDR + PBC_SC16C652_UARTA),
  86                 .uartclk  = 14745600,
  87                 .regshift = 0,
  88                 .iotype   = UPIO_MEM,
  89                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  90         }, {
  91                 .membase  = (void *)(PBC_BASE_ADDRESS + PBC_SC16C652_UARTB),
  92                 .mapbase  = (unsigned long)(MX31_CS4_BASE_ADDR + PBC_SC16C652_UARTB),
  93                 .uartclk  = 14745600,
  94                 .regshift = 0,
  95                 .iotype   = UPIO_MEM,
  96                 .flags    = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ,
  97         },
  98         {},
  99 };
 100
 101 static struct platform_device serial_device = {
 102         .name   = "serial8250",
 103         .id     = 0,
 104         .dev    = {
 105                 .platform_data = serial_platform_data,
 106         },
 107 };
 108
 109 static struct resource mx31ads_cs8900_resources[] __initdata = {
 110         DEFINE_RES_MEM(MX31_CS4_BASE_ADDR + CS4_CS8900_MMIO_START, SZ_64K),
 111         DEFINE_RES_IRQ(-1),
 112 };
 113
 114 static const struct platform_device_info mx31ads_cs8900_devinfo __initconst = {
 115         .name = "cs89x0",
 116         .id = 0,
 117         .res = mx31ads_cs8900_resources,
 118         .num_res = ARRAY_SIZE(mx31ads_cs8900_resources),
 119 };
 120
 121 static int __init mxc_init_extuart(void)
 122 {
 123         serial_platform_data[0].irq = irq_find_mapping(domain,
 124                                                        EXPIO_INT_XUART_INTA);
 125         serial_platform_data[1].irq = irq_find_mapping(domain,
 126                                                        EXPIO_INT_XUART_INTB);
 127         return platform_device_register(&serial_device);
 128 }
 129
 130 static void __init mxc_init_ext_ethernet(void)
 131 {
 132         mx31ads_cs8900_resources[1].start =
 133                         irq_find_mapping(domain, EXPIO_INT_ENET_INT);
 134         mx31ads_cs8900_resources[1].end =
 135                         irq_find_mapping(domain, EXPIO_INT_ENET_INT);
 136         platform_device_register_full(
 137                 (struct platform_device_info *)&mx31ads_cs8900_devinfo);
 138 }
 139
 140 static const struct imxuart_platform_data uart_pdata __initconst = {
 141         .flags = IMXUART_HAVE_RTSCTS,
 142 };
 143
 144 static unsigned int uart_pins[] = {
 145         MX31_PIN_CTS1__CTS1,
 146         MX31_PIN_RTS1__RTS1,
 147         MX31_PIN_TXD1__TXD1,
 148         MX31_PIN_RXD1__RXD1
 149 };
 150
 151 static inline void mxc_init_imx_uart(void)
 152 {
 153         mxc_iomux_setup_multiple_pins(uart_pins, ARRAY_SIZE(uart_pins), "uart-0");
 154         imx31_add_imx_uart0(&uart_pdata);
 155 }
 156
 157 static void mx31ads_expio_irq_handler(struct irq_desc *desc)
 158 {
 159         u32 imr_val;
 160         u32 int_valid;
 161         u32 expio_irq;
 162
 163         imr_val = imx_readw(PBC_INTMASK_SET_REG);
 164         int_valid = imx_readw(PBC_INTSTATUS_REG) & imr_val;
 165
 166         expio_irq = 0;
 167         for (; int_valid != 0; int_valid >>= 1, expio_irq++) {
 168                 if ((int_valid & 1) == 0)
 169                         continue;
 170
 171                 generic_handle_irq(irq_find_mapping(domain, expio_irq));
 172         }
 173 }
 174
 175 /*
 176  * Disable an expio pin's interrupt by setting the bit in the imr.
 177  * @param d     an expio virtual irq description
 178  */
 179 static void expio_mask_irq(struct irq_data *d)
 180 {
 181         u32 expio = d->hwirq;
 182         /* mask the interrupt */
 183         imx_writew(1 << expio, PBC_INTMASK_CLEAR_REG);
 184         imx_readw(PBC_INTMASK_CLEAR_REG);
 185 }
 186
 187 /*
 188  * Acknowledge an expanded io pin's interrupt by clearing the bit in the isr.
 189  * @param d     an expio virtual irq description
 190  */
 191 static void expio_ack_irq(struct irq_data *d)
 192 {
 193         u32 expio = d->hwirq;
 194         /* clear the interrupt status */
 195         imx_writew(1 << expio, PBC_INTSTATUS_REG);
 196 }
 197
 198 /*
 199  * Enable a expio pin's interrupt by clearing the bit in the imr.
 200  * @param d     an expio virtual irq description
 201  */
 202 static void expio_unmask_irq(struct irq_data *d)
 203 {
 204         u32 expio = d->hwirq;
 205         /* unmask the interrupt */
 206         imx_writew(1 << expio, PBC_INTMASK_SET_REG);
 207 }
 208
 209 static struct irq_chip expio_irq_chip = {
 210         .name = "EXPIO(CPLD)",
 211         .irq_ack = expio_ack_irq,
 212         .irq_mask = expio_mask_irq,
 213         .irq_unmask = expio_unmask_irq,
 214 };
 215
 216 static void __init mx31ads_init_expio(void)
 217 {
 218         int irq_base;
 219         int i, irq;
 220
 221         printk(KERN_INFO "MX31ADS EXPIO(CPLD) hardware\n");
 222
 223         /*
 224          * Configure INT line as GPIO input
 225          */
 226         mxc_iomux_alloc_pin(IOMUX_MODE(MX31_PIN_GPIO1_4, IOMUX_CONFIG_GPIO), "expio");
 227
 228         /* disable the interrupt and clear the status */
 229         imx_writew(0xFFFF, PBC_INTMASK_CLEAR_REG);
 230         imx_writew(0xFFFF, PBC_INTSTATUS_REG);
 231
 232         irq_base = irq_alloc_descs(-1, 0, MXC_MAX_EXP_IO_LINES, numa_node_id());
 233         WARN_ON(irq_base < 0);
 234
 235         domain = irq_domain_add_legacy(NULL, MXC_MAX_EXP_IO_LINES, irq_base, 0,
 236                                        &irq_domain_simple_ops, NULL);
 237         WARN_ON(!domain);
 238
 239         for (i = irq_base; i < irq_base + MXC_MAX_EXP_IO_LINES; i++) {
 240                 irq_set_chip_and_handler(i, &expio_irq_chip, handle_level_irq);
 241                 irq_clear_status_flags(i, IRQ_NOREQUEST);
 242         }
 243         irq = gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_4));
 244         irq_set_irq_type(irq, IRQ_TYPE_LEVEL_HIGH);
 245         irq_set_chained_handler(irq, mx31ads_expio_irq_handler);
 246 }
 247
 248 #ifdef CONFIG_MACH_MX31ADS_WM1133_EV1
 249 /* This section defines setup for the Wolfson Microelectronics
 250  * 1133-EV1 PMU/audio board.  When other PMU boards are supported the
 251  * regulator definitions may be shared with them, but for now they can
 252  * only be used with this board so would generate warnings about
 253  * unused statics and some of the configuration is specific to this
 254  * module.
 255  */
 256
 257 /* CPU */
 258 static struct regulator_consumer_supply sw1a_consumers[] = {
 259         {
 260                 .supply = "cpu_vcc",
 261         }
 262 };
 263
 264 static struct regulator_init_data sw1a_data = {
 265         .constraints = {
 266                 .name = "SW1A",
 267                 .min_uV = 1275000,
 268                 .max_uV = 1600000,
 269                 .valid_ops_mask = REGULATOR_CHANGE_VOLTAGE |
 270                                   REGULATOR_CHANGE_MODE,
 271                 .valid_modes_mask = REGULATOR_MODE_NORMAL |
 272                                     REGULATOR_MODE_FAST,
 273                 .state_mem = {
 274                          .uV = 1400000,
 275                          .mode = REGULATOR_MODE_NORMAL,
 276                          .enabled = 1,
 277                  },
 278                 .initial_state = PM_SUSPEND_MEM,
 279                 .always_on = 1,
 280                 .boot_on = 1,
 281         },
 282         .num_consumer_supplies = ARRAY_SIZE(sw1a_consumers),
 283         .consumer_supplies = sw1a_consumers,
 284 };
 285
 286 /* System IO - High */
 287 static struct regulator_init_data viohi_data = {
 288         .constraints = {
 289                 .name = "VIOHO",
 290                 .min_uV = 2800000,
 291                 .max_uV = 2800000,
 292                 .state_mem = {
 293                          .uV = 2800000,
 294                          .mode = REGULATOR_MODE_NORMAL,
 295                          .enabled = 1,
 296                  },
 297                 .initial_state = PM_SUSPEND_MEM,
 298                 .always_on = 1,
 299                 .boot_on = 1,
 300         },
 301 };
 302
 303 /* System IO - Low */
 304 static struct regulator_init_data violo_data = {
 305         .constraints = {
 306                 .name = "VIOLO",
 307                 .min_uV = 1800000,
 308                 .max_uV = 1800000,
 309                 .state_mem = {
 310                          .uV = 1800000,
 311                          .mode = REGULATOR_MODE_NORMAL,
 312                          .enabled = 1,
 313                  },
 314                 .initial_state = PM_SUSPEND_MEM,
 315                 .always_on = 1,
 316                 .boot_on = 1,
 317         },
 318 };
 319
 320 /* DDR RAM */
 321 static struct regulator_init_data sw2a_data = {
 322         .constraints = {
 323                 .name = "SW2A",
 324                 .min_uV = 1800000,
 325                 .max_uV = 1800000,
 326                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 327                 .state_mem = {
 328                          .uV = 1800000,
 329                          .mode = REGULATOR_MODE_NORMAL,
 330                          .enabled = 1,
 331                  },
 332                 .state_disk = {
 333                          .mode = REGULATOR_MODE_NORMAL,
 334                          .enabled = 0,
 335                  },
 336                 .always_on = 1,
 337                 .boot_on = 1,
 338                 .initial_state = PM_SUSPEND_MEM,
 339         },
 340 };
 341
 342 static struct regulator_init_data ldo1_data = {
 343         .constraints = {
 344                 .name = "VCAM/VMMC1/VMMC2",
 345                 .min_uV = 2800000,
 346                 .max_uV = 2800000,
 347                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 348                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 349                 .apply_uV = 1,
 350         },
 351 };
 352
 353 static struct regulator_consumer_supply ldo2_consumers[] = {
 354         { .supply = "AVDD", .dev_name = "1-001a" },
 355         { .supply = "HPVDD", .dev_name = "1-001a" },
 356 };
 357
 358 /* CODEC and SIM */
 359 static struct regulator_init_data ldo2_data = {
 360         .constraints = {
 361                 .name = "VESIM/VSIM/AVDD",
 362                 .min_uV = 3300000,
 363                 .max_uV = 3300000,
 364                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 365                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
 366                 .apply_uV = 1,
 367         },
 368         .num_consumer_supplies = ARRAY_SIZE(ldo2_consumers),
 369         .consumer_supplies = ldo2_consumers,
 370 };
 371
 372 /* General */
 373 static struct regulator_init_data vdig_data = {
 374         .constraints = {
 375                 .name = "VDIG",
 376                 .min_uV = 1500000,
 377                 .max_uV = 1500000,
 378                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 379                 .apply_uV = 1,
 380                 .always_on = 1,
 381                 .boot_on = 1,
 382         },
 383 };
 384
 385 /* Tranceivers */
 386 static struct regulator_init_data ldo4_data = {
 387         .constraints = {
 388                 .name = "VRF1/CVDD_2.775",
 389                 .min_uV = 2500000,
 390                 .max_uV = 2500000,
 391                 .valid_modes_mask = REGULATOR_MODE_NORMAL,
 392                 .apply_uV = 1,
 393                 .always_on = 1,
 394                 .boot_on = 1,
 395         },
 396 };
 397
 398 static struct wm8350_led_platform_data wm8350_led_data = {
 399         .name            = "wm8350:white",
 400         .default_trigger = "heartbeat",
 401         .max_uA          = 27899,
 402 };
 403
 404 static struct wm8350_audio_platform_data imx32ads_wm8350_setup = {
 405         .vmid_discharge_msecs = 1000,
 406         .drain_msecs = 30,
 407         .cap_discharge_msecs = 700,
 408         .vmid_charge_msecs = 700,
 409         .vmid_s_curve = WM8350_S_CURVE_SLOW,
 410         .dis_out4 = WM8350_DISCHARGE_SLOW,
 411         .dis_out3 = WM8350_DISCHARGE_SLOW,
 412         .dis_out2 = WM8350_DISCHARGE_SLOW,
 413         .dis_out1 = WM8350_DISCHARGE_SLOW,
 414         .vroi_out4 = WM8350_TIE_OFF_500R,
 415         .vroi_out3 = WM8350_TIE_OFF_500R,
 416         .vroi_out2 = WM8350_TIE_OFF_500R,
 417         .vroi_out1 = WM8350_TIE_OFF_500R,
 418         .vroi_enable = 0,
 419         .codec_current_on = WM8350_CODEC_ISEL_1_0,
 420         .codec_current_standby = WM8350_CODEC_ISEL_0_5,
 421         .codec_current_charge = WM8350_CODEC_ISEL_1_5,
 422 };
 423
 424 static int mx31_wm8350_init(struct wm8350 *wm8350)
 425 {
 426         wm8350_gpio_config(wm8350, 0, WM8350_GPIO_DIR_IN,
 427                            WM8350_GPIO0_PWR_ON_IN, WM8350_GPIO_ACTIVE_LOW,
 428                            WM8350_GPIO_PULL_UP, WM8350_GPIO_INVERT_OFF,
 429                            WM8350_GPIO_DEBOUNCE_ON);
 430
 431         wm8350_gpio_config(wm8350, 3, WM8350_GPIO_DIR_IN,
 432                            WM8350_GPIO3_PWR_OFF_IN, WM8350_GPIO_ACTIVE_HIGH,
 433                            WM8350_GPIO_PULL_DOWN, WM8350_GPIO_INVERT_OFF,
 434                            WM8350_GPIO_DEBOUNCE_ON);
 435
 436         wm8350_gpio_config(wm8350, 4, WM8350_GPIO_DIR_IN,
 437                            WM8350_GPIO4_MR_IN, WM8350_GPIO_ACTIVE_HIGH,
 438                            WM8350_GPIO_PULL_DOWN, WM8350_GPIO_INVERT_OFF,
 439                            WM8350_GPIO_DEBOUNCE_OFF);
 440
 441         wm8350_gpio_config(wm8350, 7, WM8350_GPIO_DIR_IN,
 442                            WM8350_GPIO7_HIBERNATE_IN, WM8350_GPIO_ACTIVE_HIGH,
 443                            WM8350_GPIO_PULL_DOWN, WM8350_GPIO_INVERT_OFF,
 444                            WM8350_GPIO_DEBOUNCE_OFF);
 445
 446         wm8350_gpio_config(wm8350, 6, WM8350_GPIO_DIR_OUT,
 447                            WM8350_GPIO6_SDOUT_OUT, WM8350_GPIO_ACTIVE_HIGH,
 448                            WM8350_GPIO_PULL_NONE, WM8350_GPIO_INVERT_OFF,
 449                            WM8350_GPIO_DEBOUNCE_OFF);
 450
 451         wm8350_gpio_config(wm8350, 8, WM8350_GPIO_DIR_OUT,
 452                            WM8350_GPIO8_VCC_FAULT_OUT, WM8350_GPIO_ACTIVE_LOW,
 453                            WM8350_GPIO_PULL_NONE, WM8350_GPIO_INVERT_OFF,
 454                            WM8350_GPIO_DEBOUNCE_OFF);
 455
 456         wm8350_gpio_config(wm8350, 9, WM8350_GPIO_DIR_OUT,
 457                            WM8350_GPIO9_BATT_FAULT_OUT, WM8350_GPIO_ACTIVE_LOW,
 458                            WM8350_GPIO_PULL_NONE, WM8350_GPIO_INVERT_OFF,
 459                            WM8350_GPIO_DEBOUNCE_OFF);
 460
 461         wm8350_register_regulator(wm8350, WM8350_DCDC_1, &sw1a_data);
 462         wm8350_register_regulator(wm8350, WM8350_DCDC_3, &viohi_data);
 463         wm8350_register_regulator(wm8350, WM8350_DCDC_4, &violo_data);
 464         wm8350_register_regulator(wm8350, WM8350_DCDC_6, &sw2a_data);
 465         wm8350_register_regulator(wm8350, WM8350_LDO_1, &ldo1_data);
 466         wm8350_register_regulator(wm8350, WM8350_LDO_2, &ldo2_data);
 467         wm8350_register_regulator(wm8350, WM8350_LDO_3, &vdig_data);
 468         wm8350_register_regulator(wm8350, WM8350_LDO_4, &ldo4_data);
 469
 470         /* LEDs */
 471         wm8350_dcdc_set_slot(wm8350, WM8350_DCDC_5, 1, 1,
 472                              WM8350_DC5_ERRACT_SHUTDOWN_CONV);
 473         wm8350_isink_set_flash(wm8350, WM8350_ISINK_A,
 474                                WM8350_ISINK_FLASH_DISABLE,
 475                                WM8350_ISINK_FLASH_TRIG_BIT,
 476                                WM8350_ISINK_FLASH_DUR_32MS,
 477                                WM8350_ISINK_FLASH_ON_INSTANT,
 478                                WM8350_ISINK_FLASH_OFF_INSTANT,
 479                                WM8350_ISINK_FLASH_MODE_EN);
 480         wm8350_dcdc25_set_mode(wm8350, WM8350_DCDC_5,
 481                                WM8350_ISINK_MODE_BOOST,
 482                                WM8350_ISINK_ILIM_NORMAL,
 483                                WM8350_DC5_RMP_20V,
 484                                WM8350_DC5_FBSRC_ISINKA);
 485         wm8350_register_led(wm8350, 0, WM8350_DCDC_5, WM8350_ISINK_A,
 486                             &wm8350_led_data);
 487
 488         wm8350->codec.platform_data = &imx32ads_wm8350_setup;
 489
 490         regulator_has_full_constraints();
 491
 492         return 0;
 493 }
 494
 495 static struct wm8350_platform_data __initdata mx31_wm8350_pdata = {
 496         .init = mx31_wm8350_init,
 497 };
 498 #endif
 499
 500 static struct i2c_board_info __initdata mx31ads_i2c1_devices[] = {
 501 #ifdef CONFIG_MACH_MX31ADS_WM1133_EV1
 502         {
 503                 I2C_BOARD_INFO("wm8350", 0x1a),
 504                 .platform_data = &mx31_wm8350_pdata,
 505                 /* irq number is run-time assigned */
 506         },
 507 #endif
 508 };
 509
 510 static void __init mxc_init_i2c(void)
 511 {
 512 #ifdef CONFIG_MACH_MX31ADS_WM1133_EV1
 513         mx31ads_i2c1_devices[0].irq =
 514                         gpio_to_irq(IOMUX_TO_GPIO(MX31_PIN_GPIO1_3));
 515 #endif
 516         i2c_register_board_info(1, mx31ads_i2c1_devices,
 517                                 ARRAY_SIZE(mx31ads_i2c1_devices));
 518
 519         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_CSPI2_MOSI, IOMUX_CONFIG_ALT1));
 520         mxc_iomux_mode(IOMUX_MODE(MX31_PIN_CSPI2_MISO, IOMUX_CONFIG_ALT1));
 521
 522         imx31_add_imx_i2c1(NULL);
 523 }
 524
 525 static unsigned int ssi_pins[] = {
 526         MX31_PIN_SFS5__SFS5,
 527         MX31_PIN_SCK5__SCK5,
 528         MX31_PIN_SRXD5__SRXD5,
 529         MX31_PIN_STXD5__STXD5,
 530 };
 531
 532 static void __init mxc_init_audio(void)
 533 {
 534         imx31_add_imx_ssi(0, NULL);
 535         mxc_iomux_setup_multiple_pins(ssi_pins, ARRAY_SIZE(ssi_pins), "ssi");
 536 }
 537
 538 /*
 539  * Static mappings, starting from the CS4 start address up to the start address
 540  * of the CS8900.
 541  */
 542 static struct map_desc mx31ads_io_desc[] __initdata = {
 543         {
 544                 .virtual        = (unsigned long)MX31_CS4_BASE_ADDR_VIRT,
 545                 .pfn            = __phys_to_pfn(MX31_CS4_BASE_ADDR),
 546                 .length         = CS4_CS8900_MMIO_START,
 547                 .type           = MT_DEVICE
 548         },
 549 };
 550
 551 static void __init mx31ads_map_io(void)
 552 {
 553         mx31_map_io();
 554         iotable_init(mx31ads_io_desc, ARRAY_SIZE(mx31ads_io_desc));
 555 }
 556
 557 static void __init mx31ads_init(void)
 558 {
 559         imx31_soc_init();
 560
 561         mxc_init_imx_uart();
 562         mxc_init_audio();
 563 }
 564
 565 static void __init mx31ads_late(void)
 566 {
 567         mx31ads_init_expio();
 568         mxc_init_extuart();
 569         mxc_init_i2c();
 570         mxc_init_ext_ethernet();
 571 }
 572
 573 static void __init mx31ads_timer_init(void)
 574 {
 575         mx31_clocks_init(26000000);
 576 }
 577
 578 MACHINE_START(MX31ADS, "Freescale MX31ADS")
 579         /* Maintainer: Freescale Semiconductor, Inc. */
 580         .atag_offset = 0x100,
 581         .map_io = mx31ads_map_io,
 582         .init_early = imx31_init_early,
 583         .init_irq       = mx31_init_irq,
 584         .init_time      = mx31ads_timer_init,
 585         .init_machine = mx31ads_init,
 586         .init_late      = mx31ads_late,
 587         .restart        = mxc_restart,
 588 MACHINE_END