linux-imx

/*

 * TI LP8788 MFD - interrupt handler

 *

 * Copyright 2012 Texas Instruments

 *

 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */

​

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/device.h>

#include <linux/mfd/lp8788.h>

#include <linux/module.h>

#include <linux/slab.h>

​

/* register address */

#define LP8788_INT_1            0x00

#define LP8788_INTEN_1          0x03

​

#define BASE_INTEN_ADDR         LP8788_INTEN_1

#define SIZE_REG            8

#define NUM_REGS            3

​

/*

 * struct lp8788_irq_data

 * @lp               : used for accessing to lp8788 registers

 * @irq_lock         : mutex for enabling/disabling the interrupt

 * @domain           : IRQ domain for handling nested interrupt

 * @enabled          : status of enabled interrupt

 */

struct lp8788_irq_data {

    struct lp8788 *lp;

    struct mutex irq_lock;

    struct irq_domain *domain;

    int enabled[LP8788_INT_MAX];

};

​

static inline u8 _irq_to_addr(enum lp8788_int_id id)

{

    return id / SIZE_REG;

}

​

static inline u8 _irq_to_enable_addr(enum lp8788_int_id id)

{

    return _irq_to_addr(id) + BASE_INTEN_ADDR;

}

​

static inline u8 _irq_to_mask(enum lp8788_int_id id)

{

    return 1 << (id % SIZE_REG);

}

​

static inline u8 _irq_to_val(enum lp8788_int_id id, int enable)

{

    return enable << (id % SIZE_REG);