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devices.c

/*
 * linux/arch/arm/mach-omap1/devices.c
 *
 * OMAP1 platform device setup/initialization
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>

#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/mach-types.h>
#include <asm/mach/map.h>

#include <asm/arch/tc.h>
#include <asm/arch/board.h>
#include <asm/arch/mux.h>
#include <asm/arch/gpio.h>

/*-------------------------------------------------------------------------*/

#if defined(CONFIG_RTC_DRV_OMAP) || defined(CONFIG_RTC_DRV_OMAP_MODULE)

#define     OMAP_RTC_BASE           0xfffb4800

static struct resource rtc_resources[] = {
      {
            .start            = OMAP_RTC_BASE,
            .end        = OMAP_RTC_BASE + 0x5f,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_RTC_TIMER,
            .flags            = IORESOURCE_IRQ,
      },
      {
            .start            = INT_RTC_ALARM,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device omap_rtc_device = {
      .name           = "omap_rtc",
      .id             = -1,
      .num_resources    = ARRAY_SIZE(rtc_resources),
      .resource   = rtc_resources,
};

static void omap_init_rtc(void)
{
      (void) platform_device_register(&omap_rtc_device);
}
#else
static inline void omap_init_rtc(void) {}
#endif

#if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)

#if defined(CONFIG_ARCH_OMAP15XX)
#  define OMAP1_MBOX_SIZE     0x23
#  define INT_DSP_MAILBOX1    INT_1510_DSP_MAILBOX1
#elif defined(CONFIG_ARCH_OMAP16XX)
#  define OMAP1_MBOX_SIZE     0x2f
#  define INT_DSP_MAILBOX1    INT_1610_DSP_MAILBOX1
#endif

#define OMAP1_MBOX_BASE       IO_ADDRESS(OMAP16XX_MAILBOX_BASE)

static struct resource mbox_resources[] = {
      {
            .start            = OMAP1_MBOX_BASE,
            .end        = OMAP1_MBOX_BASE + OMAP1_MBOX_SIZE,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_DSP_MAILBOX1,
            .flags            = IORESOURCE_IRQ,
      },
};

static struct platform_device mbox_device = {
      .name       = "mailbox",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(mbox_resources),
      .resource   = mbox_resources,
};

static inline void omap_init_mbox(void)
{
      platform_device_register(&mbox_device);
}
#else
static inline void omap_init_mbox(void) { }
#endif

#if defined(CONFIG_OMAP_STI)

#define OMAP1_STI_BASE        IO_ADDRESS(0xfffea000)
#define OMAP1_STI_CHANNEL_BASE      (OMAP1_STI_BASE + 0x400)

static struct resource sti_resources[] = {
      {
            .start            = OMAP1_STI_BASE,
            .end        = OMAP1_STI_BASE + SZ_1K - 1,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = OMAP1_STI_CHANNEL_BASE,
            .end        = OMAP1_STI_CHANNEL_BASE + SZ_1K - 1,
            .flags            = IORESOURCE_MEM,
      },
      {
            .start            = INT_1610_STI,
            .flags            = IORESOURCE_IRQ,
      }
};

static struct platform_device sti_device = {
      .name       = "sti",
      .id         = -1,
      .num_resources    = ARRAY_SIZE(sti_resources),
      .resource   = sti_resources,
};

static inline void omap_init_sti(void)
{
      platform_device_register(&sti_device);
}
#else
static inline void omap_init_sti(void) {}
#endif

/*-------------------------------------------------------------------------*/

/*
 * This gets called after board-specific INIT_MACHINE, and initializes most
 * on-chip peripherals accessible on this board (except for few like USB):
 *
 *  (a) Does any "standard config" pin muxing needed.  Board-specific
 *    code will have muxed GPIO pins and done "nonstandard" setup;
 *    that code could live in the boot loader.
 *  (b) Populating board-specific platform_data with the data drivers
 *    rely on to handle wiring variations.
 *  (c) Creating platform devices as meaningful on this board and
 *    with this kernel configuration.
 *
 * Claiming GPIOs, and setting their direction and initial values, is the
 * responsibility of the device drivers.  So is responding to probe().
 *
 * Board-specific knowlege like creating devices or pin setup is to be
 * kept out of drivers as much as possible.  In particular, pin setup
 * may be handled by the boot loader, and drivers should expect it will
 * normally have been done by the time they're probed.
 */
static int __init omap1_init_devices(void)
{
      /* please keep these calls, and their implementations above,
       * in alphabetical order so they're easier to sort through.
       */

      omap_init_mbox();
      omap_init_rtc();
      omap_init_sti();

      return 0;
}
arch_initcall(omap1_init_devices);


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