linux-imx

/*

 * Retu/Tahvo MFD driver

 *

 * Copyright (C) 2004, 2005 Nokia Corporation

 *

 * Based on code written by Juha Yrjölä, David Weinehall and Mikko Ylinen.

 * Rewritten by Aaro Koskinen.

 *

 * This file is subject to the terms and conditions of the GNU General

 * Public License. See the file "COPYING" in the main directory of this

 * archive for more details.

 *

 * 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.

 */

​

#include <linux/err.h>

#include <linux/i2c.h>

#include <linux/irq.h>

#include <linux/slab.h>

#include <linux/mutex.h>

#include <linux/module.h>

#include <linux/regmap.h>

#include <linux/mfd/core.h>

#include <linux/mfd/retu.h>

#include <linux/interrupt.h>

#include <linux/moduleparam.h>

​

/* Registers */

#define RETU_REG_ASICR      0x00        /* ASIC ID and revision */

#define RETU_REG_ASICR_VILMA    (1 << 7)    /* Bit indicating Vilma */

#define RETU_REG_IDR        0x01        /* Interrupt ID */

#define RETU_REG_IMR        0x02        /* Interrupt mask (Retu) */

#define TAHVO_REG_IMR       0x03        /* Interrupt mask (Tahvo) */

​

/* Interrupt sources */

#define RETU_INT_PWR        0       /* Power button */

​

struct retu_dev {

    struct regmap           *regmap;

    struct device           *dev;

    struct mutex            mutex;

    struct regmap_irq_chip_data *irq_data;

};

​

static struct resource retu_pwrbutton_res[] = {

    {

        .name   = "retu-pwrbutton",

        .start  = RETU_INT_PWR,

        .end    = RETU_INT_PWR,

        .flags  = IORESOURCE_IRQ,

    },

};

​

static const struct mfd_cell retu_devs[] = {

    {

        .name       = "retu-wdt"

    },

    {

        .name       = "retu-pwrbutton",

        .resources  = retu_pwrbutton_res,

        .num_resources  = ARRAY_SIZE(retu_pwrbutton_res),

    }

};

​

static struct regmap_irq retu_irqs[] = {

    [RETU_INT_PWR] = {

        .mask = 1 << RETU_INT_PWR,

    }

};

​

static struct regmap_irq_chip retu_irq_chip = {

    .name       = "RETU",

    .irqs       = retu_irqs,

    .num_irqs   = ARRAY_SIZE(retu_irqs),

    .num_regs   = 1,

    .status_base    = RETU_REG_IDR,

    .mask_base  = RETU_REG_IMR,

    .ack_base   = RETU_REG_IDR,

};

​

/* Retu device registered for the power off. */

static struct retu_dev *retu_pm_power_off;

​

static struct resource tahvo_usb_res[] = {

    {

        .name   = "tahvo-usb",

        .start  = TAHVO_INT_VBUS,

        .end    = TAHVO_INT_VBUS,

        .flags  = IORESOURCE_IRQ,