// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * Author: Mattias Wallin <mattias.wallin@stericsson.com> for ST-Ericsson.
 */
/*
 * AB8500 register access
 * ======================
 *
 * read:
 * # echo BANK  >  <debugfs>/ab8500/register-bank
 * # echo ADDR  >  <debugfs>/ab8500/register-address
 * # cat <debugfs>/ab8500/register-value
 *
 * write:
 * # echo BANK  >  <debugfs>/ab8500/register-bank
 * # echo ADDR  >  <debugfs>/ab8500/register-address
 * # echo VALUE >  <debugfs>/ab8500/register-value
 *
 * read all registers from a bank:
 * # echo BANK  >  <debugfs>/ab8500/register-bank
 * # cat <debugfs>/ab8500/all-bank-register
 *
 * BANK   target AB8500 register bank
 * ADDR   target AB8500 register address
 * VALUE  decimal or 0x-prefixed hexadecimal
 *
 *
 * User Space notification on AB8500 IRQ
 * =====================================
 *
 * Allows user space entity to be notified when target AB8500 IRQ occurs.
 * When subscribed, a sysfs entry is created in ab8500.i2c platform device.
 * One can pool this file to get target IRQ occurence information.
 *
 * subscribe to an AB8500 IRQ:
 * # echo IRQ  >  <debugfs>/ab8500/irq-subscribe
 *
 * unsubscribe from an AB8500 IRQ:
 * # echo IRQ  >  <debugfs>/ab8500/irq-unsubscribe
 *
 *
 * AB8500 register formated read/write access
 * ==========================================
 *
 * Read:  read data, data>>SHIFT, data&=MASK, output data
 *        [0xABCDEF98] shift=12 mask=0xFFF => 0x00000CDE
 * Write: read data, data &= ~(MASK<<SHIFT), data |= (VALUE<<SHIFT), write data
 *        [0xABCDEF98] shift=12 mask=0xFFF value=0x123 => [0xAB123F98]
 *
 * Usage:
 * # echo "CMD [OPTIONS] BANK ADRESS [VALUE]" > $debugfs/ab8500/hwreg
 *
 * CMD      read      read access
 *          write     write access
 *
 * BANK     target reg bank
 * ADDRESS  target reg address
 * VALUE    (write) value to be updated
 *
 * OPTIONS
 *  -d|-dec            (read) output in decimal
 *  -h|-hexa           (read) output in 0x-hexa (default)
 *  -l|-w|-b           32bit (default), 16bit or 8bit reg access
 *  -m|-mask MASK      0x-hexa mask (default 0xFFFFFFFF)
 *  -s|-shift SHIFT    bit shift value (read:left, write:right)
 *  -o|-offset OFFSET  address offset to add to ADDRESS value
 *
 * Warning: bit shift operation is applied to bit-mask.
 * Warning: bit shift direction depends on read or right command.
 */

#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/debugfs.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/kobject.h>
#include <linux/slab.h>
#include <linux/irq.h>

#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>

#ifdef CONFIG_DEBUG_FS
#include <linux/string.h>
#include <linux/ctype.h>
#endif

static u32 debug_bank;
static u32 debug_address;

static int irq_ab8500;
static int irq_first;
static int irq_last;
static u32 *irq_count;
static int num_irqs;

static struct device_attribute **dev_attr;
static char **event_name;

/**
 * struct ab8500_reg_range
 * @first: the first address of the range
 * @last: the last address of the range
 * @perm: access permissions for the range
 */
struct ab8500_reg_range {
        u8 first;
        u8 last;
        u8 perm;
};

/**
 * struct ab8500_prcmu_ranges
 * @num_ranges: the number of ranges in the list
 * @bankid: bank identifier
 * @range: the list of register ranges
 */
struct ab8500_prcmu_ranges {
        u8 num_ranges;
        u8 bankid;
        const struct ab8500_reg_range *range;
};

/* hwreg- "mask" and "shift" entries ressources */
struct hwreg_cfg {
        u32  bank;      /* target bank */
        unsigned long addr;      /* target address */
        uint fmt;       /* format */
        unsigned long mask; /* read/write mask, applied before any bit shift */
        long shift;     /* bit shift (read:right shift, write:left shift */
};
/* fmt bit #0: 0=hexa, 1=dec */
#define REG_FMT_DEC(c) ((c)->fmt & 0x1)
#define REG_FMT_HEX(c) (!REG_FMT_DEC(c))

static struct hwreg_cfg hwreg_cfg = {
        .addr = 0,                      /* default: invalid phys addr */
        .fmt = 0,                       /* default: 32bit access, hex output */
        .mask = 0xFFFFFFFF,     /* default: no mask */
        .shift = 0,                     /* default: no bit shift */
};

#define AB8500_NAME_STRING "ab8500"
#define AB8500_NUM_BANKS AB8500_DEBUG_FIELD_LAST

#define AB8500_REV_REG 0x80

static struct ab8500_prcmu_ranges *debug_ranges;

static struct ab8500_prcmu_ranges ab8500_debug_ranges[AB8500_NUM_BANKS] = {
        [AB8500_M_FSM_RANK] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_SYS_CTRL1_BLOCK] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x02,
                        },
                        {
                                .first = 0x42,
                                .last = 0x42,
                        },
                        {
                                .first = 0x80,
                                .last = 0x81,
                        },
                },
        },
        [AB8500_SYS_CTRL2_BLOCK] = {
                .num_ranges = 4,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x0D,
                        },
                        {
                                .first = 0x0F,
                                .last = 0x17,
                        },
                        {
                                .first = 0x30,
                                .last = 0x30,
                        },
                        {
                                .first = 0x32,
                                .last = 0x33,
                        },
                },
        },
        [AB8500_REGU_CTRL1] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x03,
                                .last = 0x10,
                        },
                        {
                                .first = 0x80,
                                .last = 0x84,
                        },
                },
        },
        [AB8500_REGU_CTRL2] = {
                .num_ranges = 5,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x15,
                        },
                        {
                                .first = 0x17,
                                .last = 0x19,
                        },
                        {
                                .first = 0x1B,
                                .last = 0x1D,
                        },
                        {
                                .first = 0x1F,
                                .last = 0x22,
                        },
                        {
                                .first = 0x40,
                                .last = 0x44,
                        },
                        /*
                         * 0x80-0x8B are SIM registers and should
                         * not be accessed from here
                         */
                },
        },
        [AB8500_USB] = {
                .num_ranges = 2,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x80,
                                .last = 0x83,
                        },
                        {
                                .first = 0x87,
                                .last = 0x8A,
                        },
                },
        },
        [AB8500_TVOUT] = {
                .num_ranges = 9,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x12,
                        },
                        {
                                .first = 0x15,
                                .last = 0x17,
                        },
                        {
                                .first = 0x19,
                                .last = 0x21,
                        },
                        {
                                .first = 0x27,
                                .last = 0x2C,
                        },
                        {
                                .first = 0x41,
                                .last = 0x41,
                        },
                        {
                                .first = 0x45,
                                .last = 0x5B,
                        },
                        {
                                .first = 0x5D,
                                .last = 0x5D,
                        },
                        {
                                .first = 0x69,
                                .last = 0x69,
                        },
                        {
                                .first = 0x80,
                                .last = 0x81,
                        },
                },
        },
        [AB8500_DBI] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_ECI_AV_ACC] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                },
        },
        [AB8500_RESERVED] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_GPADC] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x08,
                        },
                },
        },
        [AB8500_CHARGER] = {
                .num_ranges = 9,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x03,
                        },
                        {
                                .first = 0x05,
                                .last = 0x05,
                        },
                        {
                                .first = 0x40,
                                .last = 0x40,
                        },
                        {
                                .first = 0x42,
                                .last = 0x42,
                        },
                        {
                                .first = 0x44,
                                .last = 0x44,
                        },
                        {
                                .first = 0x50,
                                .last = 0x55,
                        },
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                        {
                                .first = 0xC0,
                                .last = 0xC2,
                        },
                        {
                                .first = 0xf5,
                                .last = 0xf6,
                        },
                },
        },
        [AB8500_GAS_GAUGE] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x07,
                                .last = 0x0A,
                        },
                        {
                                .first = 0x10,
                                .last = 0x14,
                        },
                },
        },
        [AB8500_AUDIO] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x6F,
                        },
                },
        },
        [AB8500_INTERRUPT] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_RTC] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x0F,
                        },
                },
        },
        [AB8500_MISC] = {
                .num_ranges = 8,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x05,
                        },
                        {
                                .first = 0x10,
                                .last = 0x15,
                        },
                        {
                                .first = 0x20,
                                .last = 0x25,
                        },
                        {
                                .first = 0x30,
                                .last = 0x35,
                        },
                        {
                                .first = 0x40,
                                .last = 0x45,
                        },
                        {
                                .first = 0x50,
                                .last = 0x50,
                        },
                        {
                                .first = 0x60,
                                .last = 0x67,
                        },
                        {
                                .first = 0x80,
                                .last = 0x80,
                        },
                },
        },
        [AB8500_DEVELOPMENT] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                },
        },
        [AB8500_DEBUG] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x05,
                                .last = 0x07,
                        },
                },
        },
        [AB8500_PROD_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_STE_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_OTP_EMUL] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x01,
                                .last = 0x0F,
                        },
                },
        },
};

static struct ab8500_prcmu_ranges ab8505_debug_ranges[AB8500_NUM_BANKS] = {
        [0x0] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_SYS_CTRL1_BLOCK] = {
                .num_ranges = 5,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x04,
                        },
                        {
                                .first = 0x42,
                                .last = 0x42,
                        },
                        {
                                .first = 0x52,
                                .last = 0x52,
                        },
                        {
                                .first = 0x54,
                                .last = 0x57,
                        },
                        {
                                .first = 0x80,
                                .last = 0x83,
                        },
                },
        },
        [AB8500_SYS_CTRL2_BLOCK] = {
                .num_ranges = 5,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x0D,
                        },
                        {
                                .first = 0x0F,
                                .last = 0x17,
                        },
                        {
                                .first = 0x20,
                                .last = 0x20,
                        },
                        {
                                .first = 0x30,
                                .last = 0x30,
                        },
                        {
                                .first = 0x32,
                                .last = 0x3A,
                        },
                },
        },
        [AB8500_REGU_CTRL1] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x03,
                                .last = 0x11,
                        },
                        {
                                .first = 0x80,
                                .last = 0x86,
                        },
                },
        },
        [AB8500_REGU_CTRL2] = {
                .num_ranges = 6,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x06,
                        },
                        {
                                .first = 0x08,
                                .last = 0x15,
                        },
                        {
                                .first = 0x17,
                                .last = 0x19,
                        },
                        {
                                .first = 0x1B,
                                .last = 0x1D,
                        },
                        {
                                .first = 0x1F,
                                .last = 0x30,
                        },
                        {
                                .first = 0x40,
                                .last = 0x48,
                        },
                        /*
                         * 0x80-0x8B are SIM registers and should
                         * not be accessed from here
                         */
                },
        },
        [AB8500_USB] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x80,
                                .last = 0x83,
                        },
                        {
                                .first = 0x87,
                                .last = 0x8A,
                        },
                        {
                                .first = 0x91,
                                .last = 0x94,
                        },
                },
        },
        [AB8500_TVOUT] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_DBI] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_ECI_AV_ACC] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                },
        },
        [AB8500_RESERVED] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_GPADC] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x08,
                        },
                },
        },
        [AB8500_CHARGER] = {
                .num_ranges = 9,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x02,
                                .last = 0x03,
                        },
                        {
                                .first = 0x05,
                                .last = 0x05,
                        },
                        {
                                .first = 0x40,
                                .last = 0x44,
                        },
                        {
                                .first = 0x50,
                                .last = 0x57,
                        },
                        {
                                .first = 0x60,
                                .last = 0x60,
                        },
                        {
                                .first = 0xA0,
                                .last = 0xA7,
                        },
                        {
                                .first = 0xAF,
                                .last = 0xB2,
                        },
                        {
                                .first = 0xC0,
                                .last = 0xC2,
                        },
                        {
                                .first = 0xF5,
                                .last = 0xF5,
                        },
                },
        },
        [AB8500_GAS_GAUGE] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x07,
                                .last = 0x0A,
                        },
                        {
                                .first = 0x10,
                                .last = 0x14,
                        },
                },
        },
        [AB8500_AUDIO] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x83,
                        },
                },
        },
        [AB8500_INTERRUPT] = {
                .num_ranges = 11,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x04,
                        },
                        {
                                .first = 0x06,
                                .last = 0x07,
                        },
                        {
                                .first = 0x09,
                                .last = 0x09,
                        },
                        {
                                .first = 0x0B,
                                .last = 0x0C,
                        },
                        {
                                .first = 0x12,
                                .last = 0x15,
                        },
                        {
                                .first = 0x18,
                                .last = 0x18,
                        },
                        /* Latch registers should not be read here */
                        {
                                .first = 0x40,
                                .last = 0x44,
                        },
                        {
                                .first = 0x46,
                                .last = 0x49,
                        },
                        {
                                .first = 0x4B,
                                .last = 0x4D,
                        },
                        {
                                .first = 0x52,
                                .last = 0x55,
                        },
                        {
                                .first = 0x58,
                                .last = 0x58,
                        },
                        /* LatchHier registers should not be read here */
                },
        },
        [AB8500_RTC] = {
                .num_ranges = 2,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x14,
                        },
                        {
                                .first = 0x16,
                                .last = 0x17,
                        },
                },
        },
        [AB8500_MISC] = {
                .num_ranges = 8,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x06,
                        },
                        {
                                .first = 0x10,
                                .last = 0x16,
                        },
                        {
                                .first = 0x20,
                                .last = 0x26,
                        },
                        {
                                .first = 0x30,
                                .last = 0x36,
                        },
                        {
                                .first = 0x40,
                                .last = 0x46,
                        },
                        {
                                .first = 0x50,
                                .last = 0x50,
                        },
                        {
                                .first = 0x60,
                                .last = 0x6B,
                        },
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                },
        },
        [AB8500_DEVELOPMENT] = {
                .num_ranges = 2,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x05,
                                .last = 0x05,
                        },
                },
        },
        [AB8500_DEBUG] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x05,
                                .last = 0x07,
                        },
                },
        },
        [AB8500_PROD_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_STE_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_OTP_EMUL] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x01,
                                .last = 0x15,
                        },
                },
        },
};

static struct ab8500_prcmu_ranges ab8540_debug_ranges[AB8500_NUM_BANKS] = {
        [AB8500_M_FSM_RANK] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x0B,
                        },
                },
        },
        [AB8500_SYS_CTRL1_BLOCK] = {
                .num_ranges = 6,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x04,
                        },
                        {
                                .first = 0x42,
                                .last = 0x42,
                        },
                        {
                                .first = 0x50,
                                .last = 0x54,
                        },
                        {
                                .first = 0x57,
                                .last = 0x57,
                        },
                        {
                                .first = 0x80,
                                .last = 0x83,
                        },
                        {
                                .first = 0x90,
                                .last = 0x90,
                        },
                },
        },
        [AB8500_SYS_CTRL2_BLOCK] = {
                .num_ranges = 5,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x0D,
                        },
                        {
                                .first = 0x0F,
                                .last = 0x10,
                        },
                        {
                                .first = 0x20,
                                .last = 0x21,
                        },
                        {
                                .first = 0x32,
                                .last = 0x3C,
                        },
                        {
                                .first = 0x40,
                                .last = 0x42,
                        },
                },
        },
        [AB8500_REGU_CTRL1] = {
                .num_ranges = 4,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x03,
                                .last = 0x15,
                        },
                        {
                                .first = 0x20,
                                .last = 0x20,
                        },
                        {
                                .first = 0x80,
                                .last = 0x85,
                        },
                        {
                                .first = 0x87,
                                .last = 0x88,
                        },
                },
        },
        [AB8500_REGU_CTRL2] = {
                .num_ranges = 8,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x06,
                        },
                        {
                                .first = 0x08,
                                .last = 0x15,
                        },
                        {
                                .first = 0x17,
                                .last = 0x19,
                        },
                        {
                                .first = 0x1B,
                                .last = 0x1D,
                        },
                        {
                                .first = 0x1F,
                                .last = 0x2F,
                        },
                        {
                                .first = 0x31,
                                .last = 0x3A,
                        },
                        {
                                .first = 0x43,
                                .last = 0x44,
                        },
                        {
                                .first = 0x48,
                                .last = 0x49,
                        },
                },
        },
        [AB8500_USB] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x80,
                                .last = 0x83,
                        },
                        {
                                .first = 0x87,
                                .last = 0x8A,
                        },
                        {
                                .first = 0x91,
                                .last = 0x94,
                        },
                },
        },
        [AB8500_TVOUT] = {
                .num_ranges = 0,
                .range = NULL
        },
        [AB8500_DBI] = {
                .num_ranges = 4,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x07,
                        },
                        {
                                .first = 0x10,
                                .last = 0x11,
                        },
                        {
                                .first = 0x20,
                                .last = 0x21,
                        },
                        {
                                .first = 0x30,
                                .last = 0x43,
                        },

                },
        },
        [AB8500_ECI_AV_ACC] = {
                .num_ranges = 2,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x03,
                        },
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                },
        },
        [AB8500_RESERVED] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_GPADC] = {
                .num_ranges = 4,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x01,
                        },
                        {
                                .first = 0x04,
                                .last = 0x06,
                        },
                        {
                                .first = 0x09,
                                .last = 0x0A,
                        },
                        {
                                .first = 0x10,
                                .last = 0x14,
                        },
                },
        },
        [AB8500_CHARGER] = {
                .num_ranges = 10,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x02,
                                .last = 0x05,
                        },
                        {
                                .first = 0x40,
                                .last = 0x44,
                        },
                        {
                                .first = 0x50,
                                .last = 0x57,
                        },
                        {
                                .first = 0x60,
                                .last = 0x60,
                        },
                        {
                                .first = 0x70,
                                .last = 0x70,
                        },
                        {
                                .first = 0xA0,
                                .last = 0xA9,
                        },
                        {
                                .first = 0xAF,
                                .last = 0xB2,
                        },
                        {
                                .first = 0xC0,
                                .last = 0xC6,
                        },
                        {
                                .first = 0xF5,
                                .last = 0xF5,
                        },
                },
        },
        [AB8500_GAS_GAUGE] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x00,
                        },
                        {
                                .first = 0x07,
                                .last = 0x0A,
                        },
                        {
                                .first = 0x10,
                                .last = 0x14,
                        },
                },
        },
        [AB8500_AUDIO] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x9f,
                        },
                },
        },
        [AB8500_INTERRUPT] = {
                .num_ranges = 6,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x05,
                        },
                        {
                                .first = 0x0B,
                                .last = 0x0D,
                        },
                        {
                                .first = 0x12,
                                .last = 0x20,
                        },
                        /* Latch registers should not be read here */
                        {
                                .first = 0x40,
                                .last = 0x45,
                        },
                        {
                                .first = 0x4B,
                                .last = 0x4D,
                        },
                        {
                                .first = 0x52,
                                .last = 0x60,
                        },
                        /* LatchHier registers should not be read here */
                },
        },
        [AB8500_RTC] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x07,
                        },
                        {
                                .first = 0x0B,
                                .last = 0x18,
                        },
                        {
                                .first = 0x20,
                                .last = 0x25,
                        },
                },
        },
        [AB8500_MISC] = {
                .num_ranges = 9,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x06,
                        },
                        {
                                .first = 0x10,
                                .last = 0x16,
                        },
                        {
                                .first = 0x20,
                                .last = 0x26,
                        },
                        {
                                .first = 0x30,
                                .last = 0x36,
                        },
                        {
                                .first = 0x40,
                                .last = 0x49,
                        },
                        {
                                .first = 0x50,
                                .last = 0x50,
                        },
                        {
                                .first = 0x60,
                                .last = 0x6B,
                        },
                        {
                                .first = 0x70,
                                .last = 0x74,
                        },
                        {
                                .first = 0x80,
                                .last = 0x82,
                        },
                },
        },
        [AB8500_DEVELOPMENT] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x01,
                        },
                        {
                                .first = 0x06,
                                .last = 0x06,
                        },
                        {
                                .first = 0x10,
                                .last = 0x21,
                        },
                },
        },
        [AB8500_DEBUG] = {
                .num_ranges = 3,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x01,
                                .last = 0x0C,
                        },
                        {
                                .first = 0x0E,
                                .last = 0x11,
                        },
                        {
                                .first = 0x80,
                                .last = 0x81,
                        },
                },
        },
        [AB8500_PROD_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_STE_TEST] = {
                .num_ranges = 0,
                .range = NULL,
        },
        [AB8500_OTP_EMUL] = {
                .num_ranges = 1,
                .range = (struct ab8500_reg_range[]) {
                        {
                                .first = 0x00,
                                .last = 0x3F,
                        },
                },
        },
};

static irqreturn_t ab8500_debug_handler(int irq, void *data)
{
        char buf[16];
        struct kobject *kobj = (struct kobject *)data;
        unsigned int irq_abb = irq - irq_first;

        if (irq_abb < num_irqs)
                irq_count[irq_abb]++;
        /*
         * This makes it possible to use poll for events (EPOLLPRI | EPOLLERR)
         * from userspace on sysfs file named <irq-nr>
         */
        sprintf(buf, "%d", irq);
        sysfs_notify(kobj, NULL, buf);

        return IRQ_HANDLED;
}

/* Prints to seq_file or log_buf */
static int ab8500_registers_print(struct device *dev, u32 bank,
                                  struct seq_file *s)
{
        unsigned int i;

        for (i = 0; i < debug_ranges[bank].num_ranges; i++) {
                u32 reg;

                for (reg = debug_ranges[bank].range[i].first;
                        reg <= debug_ranges[bank].range[i].last;
                        reg++) {
                        u8 value;
                        int err;

                        err = abx500_get_register_interruptible(dev,
                                (u8)bank, (u8)reg, &value);
                        if (err < 0) {
                                dev_err(dev, "ab->read fail %d\n", err);
                                return err;
                        }

                        if (s) {
                                seq_printf(s, "  [0x%02X/0x%02X]: 0x%02X\n",
                                           bank, reg, value);
                                /*
                                 * Error is not returned here since
                                 * the output is wanted in any case
                                 */
                                if (seq_has_overflowed(s))
                                        return 0;
                        } else {
                                dev_info(dev, " [0x%02X/0x%02X]: 0x%02X\n",
                                         bank, reg, value);
                        }
                }
        }

        return 0;
}

static int ab8500_bank_registers_show(struct seq_file *s, void *p)
{
        struct device *dev = s->private;
        u32 bank = debug_bank;

        seq_puts(s, AB8500_NAME_STRING " register values:\n");

        seq_printf(s, " bank 0x%02X:\n", bank);

        return ab8500_registers_print(dev, bank, s);
}

DEFINE_SHOW_ATTRIBUTE(ab8500_bank_registers);

static int ab8500_print_all_banks(struct seq_file *s, void *p)
{
        struct device *dev = s->private;
        unsigned int i;

        seq_puts(s, AB8500_NAME_STRING " register values:\n");

        for (i = 0; i < AB8500_NUM_BANKS; i++) {
                int err;

                seq_printf(s, " bank 0x%02X:\n", i);
                err = ab8500_registers_print(dev, i, s);
                if (err)
                        return err;
        }
        return 0;
}

/* Dump registers to kernel log */
void ab8500_dump_all_banks(struct device *dev)
{
        unsigned int i;

        dev_info(dev, "ab8500 register values:\n");

        for (i = 1; i < AB8500_NUM_BANKS; i++) {
                dev_info(dev, " bank 0x%02X:\n", i);
                ab8500_registers_print(dev, i, NULL);
        }
}

static int ab8500_all_banks_open(struct inode *inode, struct file *file)
{
        struct seq_file *s;
        int err;

        err = single_open(file, ab8500_print_all_banks, inode->i_private);
        if (!err) {
                /* Default buf size in seq_read is not enough */
                s = (struct seq_file *)file->private_data;
                s->size = (PAGE_SIZE * 2);
                s->buf = kmalloc(s->size, GFP_KERNEL);
                if (!s->buf) {
                        single_release(inode, file);
                        err = -ENOMEM;
                }
        }
        return err;
}

static const struct file_operations ab8500_all_banks_fops = {
        .open = ab8500_all_banks_open,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static int ab8500_bank_print(struct seq_file *s, void *p)
{
        seq_printf(s, "0x%02X\n", debug_bank);
        return 0;
}

static int ab8500_bank_open(struct inode *inode, struct file *file)
{
        return single_open(file, ab8500_bank_print, inode->i_private);
}

static ssize_t ab8500_bank_write(struct file *file,
        const char __user *user_buf,
        size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        unsigned long user_bank;
        int err;

        err = kstrtoul_from_user(user_buf, count, 0, &user_bank);
        if (err)
                return err;

        if (user_bank >= AB8500_NUM_BANKS) {
                dev_err(dev, "debugfs error input > number of banks\n");
                return -EINVAL;
        }

        debug_bank = user_bank;

        return count;
}

static int ab8500_address_print(struct seq_file *s, void *p)
{
        seq_printf(s, "0x%02X\n", debug_address);
        return 0;
}

static int ab8500_address_open(struct inode *inode, struct file *file)
{
        return single_open(file, ab8500_address_print, inode->i_private);
}

static ssize_t ab8500_address_write(struct file *file,
                                    const char __user *user_buf,
                                    size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        unsigned long user_address;
        int err;

        err = kstrtoul_from_user(user_buf, count, 0, &user_address);
        if (err)
                return err;

        if (user_address > 0xff) {
                dev_err(dev, "debugfs error input > 0xff\n");
                return -EINVAL;
        }
        debug_address = user_address;

        return count;
}

static int ab8500_val_print(struct seq_file *s, void *p)
{
        struct device *dev = s->private;
        int ret;
        u8 regvalue;

        ret = abx500_get_register_interruptible(dev,
                (u8)debug_bank, (u8)debug_address, &regvalue);
        if (ret < 0) {
                dev_err(dev, "abx500_get_reg fail %d, %d\n",
                        ret, __LINE__);
                return -EINVAL;
        }
        seq_printf(s, "0x%02X\n", regvalue);

        return 0;
}

static int ab8500_val_open(struct inode *inode, struct file *file)
{
        return single_open(file, ab8500_val_print, inode->i_private);
}

static ssize_t ab8500_val_write(struct file *file,
                                const char __user *user_buf,
                                size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        unsigned long user_val;
        int err;

        err = kstrtoul_from_user(user_buf, count, 0, &user_val);
        if (err)
                return err;

        if (user_val > 0xff) {
                dev_err(dev, "debugfs error input > 0xff\n");
                return -EINVAL;
        }
        err = abx500_set_register_interruptible(dev,
                (u8)debug_bank, debug_address, (u8)user_val);
        if (err < 0) {
                pr_err("abx500_set_reg failed %d, %d", err, __LINE__);
                return -EINVAL;
        }

        return count;
}

/*
 * Interrupt status
 */
static u32 num_interrupts[AB8500_MAX_NR_IRQS];
static u32 num_wake_interrupts[AB8500_MAX_NR_IRQS];
static int num_interrupt_lines;

void ab8500_debug_register_interrupt(int line)
{
        if (line < num_interrupt_lines)
                num_interrupts[line]++;
}

static int ab8500_interrupts_show(struct seq_file *s, void *p)
{
        int line;

        seq_puts(s, "name: number:  number of: wake:\n");

        for (line = 0; line < num_interrupt_lines; line++) {
                struct irq_desc *desc = irq_to_desc(line + irq_first);

                seq_printf(s, "%3i:  %6i %4i",
                           line,
                           num_interrupts[line],
                           num_wake_interrupts[line]);

                if (desc && desc->name)
                        seq_printf(s, "-%-8s", desc->name);
                if (desc && desc->action) {
                        struct irqaction *action = desc->action;

                        seq_printf(s, "  %s", action->name);
                        while ((action = action->next) != NULL)
                                seq_printf(s, ", %s", action->name);
                }
                seq_putc(s, '\n');
        }

        return 0;
}

DEFINE_SHOW_ATTRIBUTE(ab8500_interrupts);

/*
 * - HWREG DB8500 formated routines
 */
static int ab8500_hwreg_print(struct seq_file *s, void *d)
{
        struct device *dev = s->private;
        int ret;
        u8 regvalue;

        ret = abx500_get_register_interruptible(dev,
                (u8)hwreg_cfg.bank, (u8)hwreg_cfg.addr, &regvalue);
        if (ret < 0) {
                dev_err(dev, "abx500_get_reg fail %d, %d\n",
                        ret, __LINE__);
                return -EINVAL;
        }

        if (hwreg_cfg.shift >= 0)
                regvalue >>= hwreg_cfg.shift;
        else
                regvalue <<= -hwreg_cfg.shift;
        regvalue &= hwreg_cfg.mask;

        if (REG_FMT_DEC(&hwreg_cfg))
                seq_printf(s, "%d\n", regvalue);
        else
                seq_printf(s, "0x%02X\n", regvalue);
        return 0;
}

static int ab8500_hwreg_open(struct inode *inode, struct file *file)
{
        return single_open(file, ab8500_hwreg_print, inode->i_private);
}

#define AB8500_SUPPLY_CONTROL_CONFIG_1 0x01
#define AB8500_SUPPLY_CONTROL_REG 0x00
#define AB8500_FIRST_SIM_REG 0x80
#define AB8500_LAST_SIM_REG 0x8B
#define AB8505_LAST_SIM_REG 0x8C

static int ab8500_modem_show(struct seq_file *s, void *p)
{
        struct device *dev = s->private;
        struct ab8500 *ab8500;
        int err;
        u8 value;
        u8 orig_value;
        u32 bank = AB8500_REGU_CTRL2;
        u32 last_sim_reg = AB8500_LAST_SIM_REG;
        u32 reg;

        ab8500 = dev_get_drvdata(dev->parent);
        dev_warn(dev, "WARNING! This operation can interfer with modem side\n"
                "and should only be done with care\n");

        err = abx500_get_register_interruptible(dev,
                AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG, &orig_value);
        if (err < 0)
                goto report_read_failure;

        /* Config 1 will allow APE side to read SIM registers */
        err = abx500_set_register_interruptible(dev,
                AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG,
                AB8500_SUPPLY_CONTROL_CONFIG_1);
        if (err < 0)
                goto report_write_failure;

        seq_printf(s, " bank 0x%02X:\n", bank);

        if (is_ab9540(ab8500) || is_ab8505(ab8500))
                last_sim_reg = AB8505_LAST_SIM_REG;

        for (reg = AB8500_FIRST_SIM_REG; reg <= last_sim_reg; reg++) {
                err = abx500_get_register_interruptible(dev,
                        bank, reg, &value);
                if (err < 0)
                        goto report_read_failure;

                seq_printf(s, "  [0x%02X/0x%02X]: 0x%02X\n", bank, reg, value);
        }
        err = abx500_set_register_interruptible(dev,
                AB8500_REGU_CTRL1, AB8500_SUPPLY_CONTROL_REG, orig_value);
        if (err < 0)
                goto report_write_failure;

        return 0;

report_read_failure:
        dev_err(dev, "ab->read fail %d\n", err);
        return err;

report_write_failure:
        dev_err(dev, "ab->write fail %d\n", err);
        return err;
}

DEFINE_SHOW_ATTRIBUTE(ab8500_modem);

/*
 * return length of an ASCII numerical value, 0 is string is not a
 * numerical value.
 * string shall start at value 1st char.
 * string can be tailed with \0 or space or newline chars only.
 * value can be decimal or hexadecimal (prefixed 0x or 0X).
 */
static int strval_len(char *b)
{
        char *s = b;

        if ((*s == '0') && ((*(s+1) == 'x') || (*(s+1) == 'X'))) {
                s += 2;
                for (; *s && (*s != ' ') && (*s != '\n'); s++) {
                        if (!isxdigit(*s))
                                return 0;
                }
        } else {
                if (*s == '-')
                        s++;
                for (; *s && (*s != ' ') && (*s != '\n'); s++) {
                        if (!isdigit(*s))
                                return 0;
                }
        }
        return (int) (s-b);
}

/*
 * parse hwreg input data.
 * update global hwreg_cfg only if input data syntax is ok.
 */
static ssize_t hwreg_common_write(char *b, struct hwreg_cfg *cfg,
                struct device *dev)
{
        uint write, val = 0;
        u8  regvalue;
        int ret;
        struct hwreg_cfg loc = {
                .bank = 0,          /* default: invalid phys addr */
                .addr = 0,          /* default: invalid phys addr */
                .fmt = 0,           /* default: 32bit access, hex output */
                .mask = 0xFFFFFFFF, /* default: no mask */
                .shift = 0,         /* default: no bit shift */
        };

        /* read or write ? */
        if (!strncmp(b, "read ", 5)) {
                write = 0;
                b += 5;
        } else if (!strncmp(b, "write ", 6)) {
                write = 1;
                b += 6;
        } else
                return -EINVAL;

        /* OPTIONS -l|-w|-b -s -m -o */
        while ((*b == ' ') || (*b == '-')) {
                if (*(b-1) != ' ') {
                        b++;
                        continue;
                }
                if ((!strncmp(b, "-d ", 3)) ||
                                (!strncmp(b, "-dec ", 5))) {
                        b += (*(b+2) == ' ') ? 3 : 5;
                        loc.fmt |= (1<<0);
                } else if ((!strncmp(b, "-h ", 3)) ||
                                (!strncmp(b, "-hex ", 5))) {
                        b += (*(b+2) == ' ') ? 3 : 5;
                        loc.fmt &= ~(1<<0);
                } else if ((!strncmp(b, "-m ", 3)) ||
                                (!strncmp(b, "-mask ", 6))) {
                        b += (*(b+2) == ' ') ? 3 : 6;
                        if (strval_len(b) == 0)
                                return -EINVAL;
                        ret = kstrtoul(b, 0, &loc.mask);
                        if (ret)
                                return ret;
                } else if ((!strncmp(b, "-s ", 3)) ||
                                (!strncmp(b, "-shift ", 7))) {
                        b += (*(b+2) == ' ') ? 3 : 7;
                        if (strval_len(b) == 0)
                                return -EINVAL;
                        ret = kstrtol(b, 0, &loc.shift);
                        if (ret)
                                return ret;
                } else {
                        return -EINVAL;
                }
        }
        /* get arg BANK and ADDRESS */
        if (strval_len(b) == 0)
                return -EINVAL;
        ret = kstrtouint(b, 0, &loc.bank);
        if (ret)
                return ret;
        while (*b == ' ')
                b++;
        if (strval_len(b) == 0)
                return -EINVAL;
        ret = kstrtoul(b, 0, &loc.addr);
        if (ret)
                return ret;

        if (write) {
                while (*b == ' ')
                        b++;
                if (strval_len(b) == 0)
                        return -EINVAL;
                ret = kstrtouint(b, 0, &val);
                if (ret)
                        return ret;
        }

        /* args are ok, update target cfg (mainly for read) */
        *cfg = loc;

#ifdef ABB_HWREG_DEBUG
        pr_warn("HWREG request: %s, %s,\n", (write) ? "write" : "read",
                REG_FMT_DEC(cfg) ? "decimal" : "hexa");
        pr_warn("  addr=0x%08X, mask=0x%X, shift=%d" "value=0x%X\n",
                cfg->addr, cfg->mask, cfg->shift, val);
#endif

        if (!write)
                return 0;

        ret = abx500_get_register_interruptible(dev,
                        (u8)cfg->bank, (u8)cfg->addr, &regvalue);
        if (ret < 0) {
                dev_err(dev, "abx500_get_reg fail %d, %d\n",
                        ret, __LINE__);
                return -EINVAL;
        }

        if (cfg->shift >= 0) {
                regvalue &= ~(cfg->mask << (cfg->shift));
                val = (val & cfg->mask) << (cfg->shift);
        } else {
                regvalue &= ~(cfg->mask >> (-cfg->shift));
                val = (val & cfg->mask) >> (-cfg->shift);
        }
        val = val | regvalue;

        ret = abx500_set_register_interruptible(dev,
                        (u8)cfg->bank, (u8)cfg->addr, (u8)val);
        if (ret < 0) {
                pr_err("abx500_set_reg failed %d, %d", ret, __LINE__);
                return -EINVAL;
        }

        return 0;
}

static ssize_t ab8500_hwreg_write(struct file *file,
        const char __user *user_buf, size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        char buf[128];
        int buf_size, ret;

        /* Get userspace string and assure termination */
        buf_size = min(count, (sizeof(buf)-1));
        if (copy_from_user(buf, user_buf, buf_size))
                return -EFAULT;
        buf[buf_size] = 0;

        /* get args and process */
        ret = hwreg_common_write(buf, &hwreg_cfg, dev);
        return (ret) ? ret : buf_size;
}

/*
 * - irq subscribe/unsubscribe stuff
 */
static int ab8500_subscribe_unsubscribe_print(struct seq_file *s, void *p)
{
        seq_printf(s, "%d\n", irq_first);

        return 0;
}

static int ab8500_subscribe_unsubscribe_open(struct inode *inode,
                                             struct file *file)
{
        return single_open(file, ab8500_subscribe_unsubscribe_print,
                inode->i_private);
}

/*
 * Userspace should use poll() on this file. When an event occur
 * the blocking poll will be released.
 */
static ssize_t show_irq(struct device *dev,
                        struct device_attribute *attr, char *buf)
{
        unsigned long name;
        unsigned int irq_index;
        int err;

        err = kstrtoul(attr->attr.name, 0, &name);
        if (err)
                return err;

        irq_index = name - irq_first;
        if (irq_index >= num_irqs)
                return -EINVAL;

        return sprintf(buf, "%u\n", irq_count[irq_index]);
}

static ssize_t ab8500_subscribe_write(struct file *file,
                                      const char __user *user_buf,
                                      size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        unsigned long user_val;
        int err;
        unsigned int irq_index;

        err = kstrtoul_from_user(user_buf, count, 0, &user_val);
        if (err)
                return err;

        if (user_val < irq_first) {
                dev_err(dev, "debugfs error input < %d\n", irq_first);
                return -EINVAL;
        }
        if (user_val > irq_last) {
                dev_err(dev, "debugfs error input > %d\n", irq_last);
                return -EINVAL;
        }

        irq_index = user_val - irq_first;
        if (irq_index >= num_irqs)
                return -EINVAL;

        /*
         * This will create a sysfs file named <irq-nr> which userspace can
         * use to select or poll and get the AB8500 events
         */
        dev_attr[irq_index] = kmalloc(sizeof(struct device_attribute),
                GFP_KERNEL);
        if (!dev_attr[irq_index])
                return -ENOMEM;

        event_name[irq_index] = kasprintf(GFP_KERNEL, "%lu", user_val);
        if (!event_name[irq_index])
                return -ENOMEM;

        dev_attr[irq_index]->show = show_irq;
        dev_attr[irq_index]->store = NULL;
        dev_attr[irq_index]->attr.name = event_name[irq_index];
        dev_attr[irq_index]->attr.mode = S_IRUGO;
        err = sysfs_create_file(&dev->kobj, &dev_attr[irq_index]->attr);
        if (err < 0) {
                pr_info("sysfs_create_file failed %d\n", err);
                return err;
        }

        err = request_threaded_irq(user_val, NULL, ab8500_debug_handler,
                                   IRQF_SHARED | IRQF_NO_SUSPEND | IRQF_ONESHOT,
                                   "ab8500-debug", &dev->kobj);
        if (err < 0) {
                pr_info("request_threaded_irq failed %d, %lu\n",
                        err, user_val);
                sysfs_remove_file(&dev->kobj, &dev_attr[irq_index]->attr);
                return err;
        }

        return count;
}

static ssize_t ab8500_unsubscribe_write(struct file *file,
                                        const char __user *user_buf,
                                        size_t count, loff_t *ppos)
{
        struct device *dev = ((struct seq_file *)(file->private_data))->private;
        unsigned long user_val;
        int err;
        unsigned int irq_index;

        err = kstrtoul_from_user(user_buf, count, 0, &user_val);
        if (err)
                return err;

        if (user_val < irq_first) {
                dev_err(dev, "debugfs error input < %d\n", irq_first);
                return -EINVAL;
        }
        if (user_val > irq_last) {
                dev_err(dev, "debugfs error input > %d\n", irq_last);
                return -EINVAL;
        }

        irq_index = user_val - irq_first;
        if (irq_index >= num_irqs)
                return -EINVAL;

        /* Set irq count to 0 when unsubscribe */
        irq_count[irq_index] = 0;

        if (dev_attr[irq_index])
                sysfs_remove_file(&dev->kobj, &dev_attr[irq_index]->attr);


        free_irq(user_val, &dev->kobj);
        kfree(event_name[irq_index]);
        kfree(dev_attr[irq_index]);

        return count;
}

/*
 * - several debugfs nodes fops
 */

static const struct file_operations ab8500_bank_fops = {
        .open = ab8500_bank_open,
        .write = ab8500_bank_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static const struct file_operations ab8500_address_fops = {
        .open = ab8500_address_open,
        .write = ab8500_address_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static const struct file_operations ab8500_val_fops = {
        .open = ab8500_val_open,
        .write = ab8500_val_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static const struct file_operations ab8500_subscribe_fops = {
        .open = ab8500_subscribe_unsubscribe_open,
        .write = ab8500_subscribe_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static const struct file_operations ab8500_unsubscribe_fops = {
        .open = ab8500_subscribe_unsubscribe_open,
        .write = ab8500_unsubscribe_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,

        .owner = THIS_MODULE,
};

static const struct file_operations ab8500_hwreg_fops = {
        .open = ab8500_hwreg_open,
        .write = ab8500_hwreg_write,
        .read = seq_read,
        .llseek = seq_lseek,
        .release = single_release,
        .owner = THIS_MODULE,
};

static int ab8500_debug_probe(struct platform_device *plf)
{
        struct dentry *ab8500_dir;
        struct ab8500 *ab8500;
        struct resource *res;

        debug_bank = AB8500_MISC;
        debug_address = AB8500_REV_REG & 0x00FF;

        ab8500 = dev_get_drvdata(plf->dev.parent);
        num_irqs = ab8500->mask_size;

        irq_count = devm_kcalloc(&plf->dev,
                                 num_irqs, sizeof(*irq_count), GFP_KERNEL);
        if (!irq_count)
                return -ENOMEM;

        dev_attr = devm_kcalloc(&plf->dev,
                                num_irqs, sizeof(*dev_attr), GFP_KERNEL);
        if (!dev_attr)
                return -ENOMEM;

        event_name = devm_kcalloc(&plf->dev,
                                  num_irqs, sizeof(*event_name), GFP_KERNEL);
        if (!event_name)
                return -ENOMEM;

        res = platform_get_resource_byname(plf, 0, "IRQ_AB8500");
        if (!res) {
                dev_err(&plf->dev, "AB8500 irq not found, err %d\n", irq_first);
                return -ENXIO;
        }
        irq_ab8500 = res->start;

        irq_first = platform_get_irq_byname(plf, "IRQ_FIRST");
        if (irq_first < 0)
                return irq_first;

        irq_last = platform_get_irq_byname(plf, "IRQ_LAST");
        if (irq_last < 0)
                return irq_last;

        ab8500_dir = debugfs_create_dir(AB8500_NAME_STRING, NULL);

        debugfs_create_file("all-bank-registers", S_IRUGO, ab8500_dir,
                            &plf->dev, &ab8500_bank_registers_fops);
        debugfs_create_file("all-banks", S_IRUGO, ab8500_dir,
                            &plf->dev, &ab8500_all_banks_fops);
        debugfs_create_file("register-bank", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_bank_fops);
        debugfs_create_file("register-address", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_address_fops);
        debugfs_create_file("register-value", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_val_fops);
        debugfs_create_file("irq-subscribe", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_subscribe_fops);

        if (is_ab8500(ab8500)) {
                debug_ranges = ab8500_debug_ranges;
                num_interrupt_lines = AB8500_NR_IRQS;
        } else if (is_ab8505(ab8500)) {
                debug_ranges = ab8505_debug_ranges;
                num_interrupt_lines = AB8505_NR_IRQS;
        } else if (is_ab9540(ab8500)) {
                debug_ranges = ab8505_debug_ranges;
                num_interrupt_lines = AB9540_NR_IRQS;
        } else if (is_ab8540(ab8500)) {
                debug_ranges = ab8540_debug_ranges;
                num_interrupt_lines = AB8540_NR_IRQS;
        }

        debugfs_create_file("interrupts", (S_IRUGO), ab8500_dir, &plf->dev,
                            &ab8500_interrupts_fops);
        debugfs_create_file("irq-unsubscribe", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_unsubscribe_fops);
        debugfs_create_file("hwreg", (S_IRUGO | S_IWUSR | S_IWGRP), ab8500_dir,
                            &plf->dev, &ab8500_hwreg_fops);
        debugfs_create_file("all-modem-registers", (S_IRUGO | S_IWUSR | S_IWGRP),
                            ab8500_dir, &plf->dev, &ab8500_modem_fops);

        return 0;
}

static struct platform_driver ab8500_debug_driver = {
        .driver = {
                .name = "ab8500-debug",
                .suppress_bind_attrs = true,
        },
        .probe  = ab8500_debug_probe,
};

static int __init ab8500_debug_init(void)
{
        return platform_driver_register(&ab8500_debug_driver);
}
subsys_initcall(ab8500_debug_init);