#ifdef  CONFIG_PM
static irqreturn_t
osk_mistral_wake_interrupt(int irq, void *ignored, struct pt_regs *regs)
{
        return IRQ_HANDLED;
}
#endif

static void __init osk_mistral_init(void)
{
        /* NOTE:  we could actually tell if there's a Mistral board
         * attached, e.g. by trying to read something from the ads7846.
         * But this arch_init() code is too early for that, since we
         * can't talk to the ads or even the i2c eeprom.
         */
 
        // omap_cfg_reg(P19_1610_GPIO6);        // BUSY
        omap_cfg_reg(P20_1610_GPIO4);   // PENIRQ
        set_irq_type(OMAP_GPIO_IRQ(4), IRQT_FALLING);
        spi_register_board_info(mistral_boardinfo,
                        ARRAY_SIZE(mistral_boardinfo));
 
        /* the sideways button (SW1) is for use as a "wakeup" button */
        omap_cfg_reg(N15_1610_MPUIO2);
        if (omap_request_gpio(OMAP_MPUIO(2)) == 0) {
                int ret = 0;
                omap_set_gpio_direction(OMAP_MPUIO(2), 1);
                set_irq_type(OMAP_GPIO_IRQ(OMAP_MPUIO(2)), IRQT_RISING);
#ifdef  CONFIG_PM
                /* share the IRQ in case someone wants to use the
                 * button for more than wakeup from system sleep.
                 */
                ret = request_irq(OMAP_GPIO_IRQ(OMAP_MPUIO(2)),
                                &osk_mistral_wake_interrupt,
                                IRQF_SHARED, "mistral_wakeup",
                                &osk_mistral_wake_interrupt);
                if (ret != 0) {
                        omap_free_gpio(OMAP_MPUIO(2));
                        printk(KERN_ERR "OSK+Mistral: no wakeup irq, %d?\n",
                                ret);
                } else
                        enable_irq_wake(OMAP_GPIO_IRQ(OMAP_MPUIO(2)));
#endif
        } else
                printk(KERN_ERR "OSK+Mistral: wakeup button is awol\n");
 
        platform_add_devices(mistral_devices, ARRAY_SIZE(mistral_devices));
}