linux-imx

/*

 * Texas Instruments Keystone IRQ controller IP driver

 *

 * Copyright (C) 2014 Texas Instruments, Inc.

 * Author: Sajesh Kumar Saran <sajesh@ti.com>

 *     Grygorii Strashko <grygorii.strashko@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 version 2.

 *

 * This program is distributed "as is" WITHOUT ANY WARRANTY of any

 * kind, whether express or implied; without even the implied warranty

 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */

​

#include <linux/irq.h>

#include <linux/bitops.h>

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/interrupt.h>

#include <linux/irqdomain.h>

#include <linux/irqchip.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/mfd/syscon.h>

#include <linux/regmap.h>

​

/* The source ID bits start from 4 to 31 (total 28 bits)*/

#define BIT_OFS         4

#define KEYSTONE_N_IRQ      (32 - BIT_OFS)

​

struct keystone_irq_device {

    struct device       *dev;

    struct irq_chip      chip;

    u32          mask;

    int          irq;

    struct irq_domain   *irqd;

    struct regmap       *devctrl_regs;

    u32         devctrl_offset;

    raw_spinlock_t      wa_lock;

};

​

static inline u32 keystone_irq_readl(struct keystone_irq_device *kirq)

{

    int ret;

    u32 val = 0;

​

    ret = regmap_read(kirq->devctrl_regs, kirq->devctrl_offset, &val);

    if (ret < 0)

        dev_dbg(kirq->dev, "irq read failed ret(%d)\n", ret);

    return val;

}

​

static inline void

keystone_irq_writel(struct keystone_irq_device *kirq, u32 value)

{

    int ret;

​

    ret = regmap_write(kirq->devctrl_regs, kirq->devctrl_offset, value);

    if (ret < 0)

        dev_dbg(kirq->dev, "irq write failed ret(%d)\n", ret);