linux-imx

/*

 * twl6030-irq.c - TWL6030 irq support

 *

 * Copyright (C) 2005-2009 Texas Instruments, Inc.

 *

 * Modifications to defer interrupt handling to a kernel thread:

 * Copyright (C) 2006 MontaVista Software, Inc.

 *

 * Based on tlv320aic23.c:

 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>

 *

 * Code cleanup and modifications to IRQ handler.

 * by syed khasim <x0khasim@ti.com>

 *

 * TWL6030 specific code and IRQ handling changes by

 * Jagadeesh Bhaskar Pakaravoor <j-pakaravoor@ti.com>

 * Balaji T K <balajitk@ti.com>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

 */

​

#include <linux/export.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/kthread.h>

#include <linux/mfd/twl.h>

#include <linux/platform_device.h>

#include <linux/suspend.h>

#include <linux/of.h>

#include <linux/irqdomain.h>

#include <linux/of_device.h>

​

#include "twl-core.h"

​

/*

 * TWL6030 (unlike its predecessors, which had two level interrupt handling)

 * three interrupt registers INT_STS_A, INT_STS_B and INT_STS_C.

 * It exposes status bits saying who has raised an interrupt. There are

 * three mask registers that corresponds to these status registers, that

 * enables/disables these interrupts.

 *

 * We set up IRQs starting at a platform-specified base. An interrupt map table,

 * specifies mapping between interrupt number and the associated module.

 */

#define TWL6030_NR_IRQS    20

​

static int twl6030_interrupt_mapping[24] = {

    PWR_INTR_OFFSET,    /* Bit 0    PWRON           */

    PWR_INTR_OFFSET,    /* Bit 1    RPWRON          */

    PWR_INTR_OFFSET,    /* Bit 2    BAT_VLOW        */

    RTC_INTR_OFFSET,    /* Bit 3    RTC_ALARM       */