max8925-core.c

Go to the documentation of this file.

/*
 * Base driver for Maxim MAX8925
 *
 * Copyright (C) 2009-2010 Marvell International Ltd.
 *  Haojian Zhuang <[email protected]>
 *
 * 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/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8925.h>

static struct resource bk_resources[] __devinitdata = {
    { 0x84, 0x84, "mode control", IORESOURCE_REG, },
    { 0x85, 0x85, "control",      IORESOURCE_REG, },
};

static struct mfd_cell bk_devs[] __devinitdata = {
    {
        .name       = "max8925-backlight",
        .num_resources  = ARRAY_SIZE(bk_resources),
        .resources  = &bk_resources[0],
        .id     = -1,
    },
};

static struct resource touch_resources[] = {
    {
        .name   = "max8925-tsc",
        .start  = MAX8925_TSC_IRQ,
        .end    = MAX8925_ADC_RES_END,
        .flags  = IORESOURCE_REG,
    },
};

static struct mfd_cell touch_devs[] = {
    {
        .name       = "max8925-touch",
        .num_resources  = 1,
        .resources  = &touch_resources[0],
        .id     = -1,
    },
};

static struct resource power_supply_resources[] = {
    {
        .name   = "max8925-power",
        .start  = MAX8925_CHG_IRQ1,
        .end    = MAX8925_CHG_IRQ1_MASK,
        .flags  = IORESOURCE_REG,
    },
};

static struct mfd_cell power_devs[] = {
    {
        .name       = "max8925-power",
        .num_resources  = 1,
        .resources  = &power_supply_resources[0],
        .id     = -1,
    },
};

static struct resource rtc_resources[] = {
    {
        .name   = "max8925-rtc",
        .start  = MAX8925_IRQ_RTC_ALARM0,
        .end    = MAX8925_IRQ_RTC_ALARM0,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct mfd_cell rtc_devs[] = {
    {
        .name       = "max8925-rtc",
        .num_resources  = 1,
        .resources  = &rtc_resources[0],
        .id     = -1,
    },
};

static struct resource onkey_resources[] = {
    {
        .name   = "max8925-onkey",
        .start  = MAX8925_IRQ_GPM_SW_R,
        .end    = MAX8925_IRQ_GPM_SW_R,
        .flags  = IORESOURCE_IRQ,
    }, {
        .name   = "max8925-onkey",
        .start  = MAX8925_IRQ_GPM_SW_F,
        .end    = MAX8925_IRQ_GPM_SW_F,
        .flags  = IORESOURCE_IRQ,
    },
};

static struct mfd_cell onkey_devs[] = {
    {
        .name       = "max8925-onkey",
        .num_resources  = 2,
        .resources  = &onkey_resources[0],
        .id     = -1,
    },
};

static struct resource sd1_resources[] __devinitdata = {
    {0x06, 0x06, "sdv", IORESOURCE_REG, },
};

static struct resource sd2_resources[] __devinitdata = {
    {0x09, 0x09, "sdv", IORESOURCE_REG, },
};

static struct resource sd3_resources[] __devinitdata = {
    {0x0c, 0x0c, "sdv", IORESOURCE_REG, },
};

static struct resource ldo1_resources[] __devinitdata = {
    {0x1a, 0x1a, "ldov", IORESOURCE_REG, },
};

static struct resource ldo2_resources[] __devinitdata = {
    {0x1e, 0x1e, "ldov", IORESOURCE_REG, },
};

static struct resource ldo3_resources[] __devinitdata = {
    {0x22, 0x22, "ldov", IORESOURCE_REG, },
};

static struct resource ldo4_resources[] __devinitdata = {
    {0x26, 0x26, "ldov", IORESOURCE_REG, },
};

static struct resource ldo5_resources[] __devinitdata = {
    {0x2a, 0x2a, "ldov", IORESOURCE_REG, },
};

static struct resource ldo6_resources[] __devinitdata = {
    {0x2e, 0x2e, "ldov", IORESOURCE_REG, },
};

static struct resource ldo7_resources[] __devinitdata = {
    {0x32, 0x32, "ldov", IORESOURCE_REG, },
};

static struct resource ldo8_resources[] __devinitdata = {
    {0x36, 0x36, "ldov", IORESOURCE_REG, },
};

static struct resource ldo9_resources[] __devinitdata = {
    {0x3a, 0x3a, "ldov", IORESOURCE_REG, },
};

static struct resource ldo10_resources[] __devinitdata = {
    {0x3e, 0x3e, "ldov", IORESOURCE_REG, },
};

static struct resource ldo11_resources[] __devinitdata = {
    {0x42, 0x42, "ldov", IORESOURCE_REG, },
};

static struct resource ldo12_resources[] __devinitdata = {
    {0x46, 0x46, "ldov", IORESOURCE_REG, },
};

static struct resource ldo13_resources[] __devinitdata = {
    {0x4a, 0x4a, "ldov", IORESOURCE_REG, },
};

static struct resource ldo14_resources[] __devinitdata = {
    {0x4e, 0x4e, "ldov", IORESOURCE_REG, },
};

static struct resource ldo15_resources[] __devinitdata = {
    {0x52, 0x52, "ldov", IORESOURCE_REG, },
};

static struct resource ldo16_resources[] __devinitdata = {
    {0x12, 0x12, "ldov", IORESOURCE_REG, },
};

static struct resource ldo17_resources[] __devinitdata = {
    {0x16, 0x16, "ldov", IORESOURCE_REG, },
};

static struct resource ldo18_resources[] __devinitdata = {
    {0x74, 0x74, "ldov", IORESOURCE_REG, },
};

static struct resource ldo19_resources[] __devinitdata = {
    {0x5e, 0x5e, "ldov", IORESOURCE_REG, },
};

static struct resource ldo20_resources[] __devinitdata = {
    {0x9e, 0x9e, "ldov", IORESOURCE_REG, },
};

static struct mfd_cell reg_devs[] __devinitdata = {
    {
        .name = "max8925-regulator",
        .id = 0,
        .num_resources = ARRAY_SIZE(sd1_resources),
        .resources = sd1_resources,
    }, {
        .name = "max8925-regulator",
        .id = 1,
        .num_resources = ARRAY_SIZE(sd2_resources),
        .resources = sd2_resources,
    }, {
        .name = "max8925-regulator",
        .id = 2,
        .num_resources = ARRAY_SIZE(sd3_resources),
        .resources = sd3_resources,
    }, {
        .name = "max8925-regulator",
        .id = 3,
        .num_resources = ARRAY_SIZE(ldo1_resources),
        .resources = ldo1_resources,
    }, {
        .name = "max8925-regulator",
        .id = 4,
        .num_resources = ARRAY_SIZE(ldo2_resources),
        .resources = ldo2_resources,
    }, {
        .name = "max8925-regulator",
        .id = 5,
        .num_resources = ARRAY_SIZE(ldo3_resources),
        .resources = ldo3_resources,
    }, {
        .name = "max8925-regulator",
        .id = 6,
        .num_resources = ARRAY_SIZE(ldo4_resources),
        .resources = ldo4_resources,
    }, {
        .name = "max8925-regulator",
        .id = 7,
        .num_resources = ARRAY_SIZE(ldo5_resources),
        .resources = ldo5_resources,
    }, {
        .name = "max8925-regulator",
        .id = 8,
        .num_resources = ARRAY_SIZE(ldo6_resources),
        .resources = ldo6_resources,
    }, {
        .name = "max8925-regulator",
        .id = 9,
        .num_resources = ARRAY_SIZE(ldo7_resources),
        .resources = ldo7_resources,
    }, {
        .name = "max8925-regulator",
        .id = 10,
        .num_resources = ARRAY_SIZE(ldo8_resources),
        .resources = ldo8_resources,
    }, {
        .name = "max8925-regulator",
        .id = 11,
        .num_resources = ARRAY_SIZE(ldo9_resources),
        .resources = ldo9_resources,
    }, {
        .name = "max8925-regulator",
        .id = 12,
        .num_resources = ARRAY_SIZE(ldo10_resources),
        .resources = ldo10_resources,
    }, {
        .name = "max8925-regulator",
        .id = 13,
        .num_resources = ARRAY_SIZE(ldo11_resources),
        .resources = ldo11_resources,
    }, {
        .name = "max8925-regulator",
        .id = 14,
        .num_resources = ARRAY_SIZE(ldo12_resources),
        .resources = ldo12_resources,
    }, {
        .name = "max8925-regulator",
        .id = 15,
        .num_resources = ARRAY_SIZE(ldo13_resources),
        .resources = ldo13_resources,
    }, {
        .name = "max8925-regulator",
        .id = 16,
        .num_resources = ARRAY_SIZE(ldo14_resources),
        .resources = ldo14_resources,
    }, {
        .name = "max8925-regulator",
        .id = 17,
        .num_resources = ARRAY_SIZE(ldo15_resources),
        .resources = ldo15_resources,
    }, {
        .name = "max8925-regulator",
        .id = 18,
        .num_resources = ARRAY_SIZE(ldo16_resources),
        .resources = ldo16_resources,
    }, {
        .name = "max8925-regulator",
        .id = 19,
        .num_resources = ARRAY_SIZE(ldo17_resources),
        .resources = ldo17_resources,
    }, {
        .name = "max8925-regulator",
        .id = 20,
        .num_resources = ARRAY_SIZE(ldo18_resources),
        .resources = ldo18_resources,
    }, {
        .name = "max8925-regulator",
        .id = 21,
        .num_resources = ARRAY_SIZE(ldo19_resources),
        .resources = ldo19_resources,
    }, {
        .name = "max8925-regulator",
        .id = 22,
        .num_resources = ARRAY_SIZE(ldo20_resources),
        .resources = ldo20_resources,
    },
};

enum {
    FLAGS_ADC = 1,  /* register in ADC component */
    FLAGS_RTC,  /* register in RTC component */
};

struct max8925_irq_data {
    int reg;
    int mask_reg;
    int enable;     /* enable or not */
    int offs;       /* bit offset in mask register */
    int flags;
    int tsc_irq;
};

static struct max8925_irq_data max8925_irqs[] = {
    [MAX8925_IRQ_VCHG_DC_OVP] = {
        .reg        = MAX8925_CHG_IRQ1,
        .mask_reg   = MAX8925_CHG_IRQ1_MASK,
        .offs       = 1 << 0,
    },
    [MAX8925_IRQ_VCHG_DC_F] = {
        .reg        = MAX8925_CHG_IRQ1,
        .mask_reg   = MAX8925_CHG_IRQ1_MASK,
        .offs       = 1 << 1,
    },
    [MAX8925_IRQ_VCHG_DC_R] = {
        .reg        = MAX8925_CHG_IRQ1,
        .mask_reg   = MAX8925_CHG_IRQ1_MASK,
        .offs       = 1 << 2,
    },
    [MAX8925_IRQ_VCHG_THM_OK_R] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 0,
    },
    [MAX8925_IRQ_VCHG_THM_OK_F] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 1,
    },
    [MAX8925_IRQ_VCHG_SYSLOW_F] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 2,
    },
    [MAX8925_IRQ_VCHG_SYSLOW_R] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 3,
    },
    [MAX8925_IRQ_VCHG_RST] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 4,
    },
    [MAX8925_IRQ_VCHG_DONE] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 5,
    },
    [MAX8925_IRQ_VCHG_TOPOFF] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 6,
    },
    [MAX8925_IRQ_VCHG_TMR_FAULT] = {
        .reg        = MAX8925_CHG_IRQ2,
        .mask_reg   = MAX8925_CHG_IRQ2_MASK,
        .offs       = 1 << 7,
    },
    [MAX8925_IRQ_GPM_RSTIN] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 0,
    },
    [MAX8925_IRQ_GPM_MPL] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 1,
    },
    [MAX8925_IRQ_GPM_SW_3SEC] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 2,
    },
    [MAX8925_IRQ_GPM_EXTON_F] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 3,
    },
    [MAX8925_IRQ_GPM_EXTON_R] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 4,
    },
    [MAX8925_IRQ_GPM_SW_1SEC] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 5,
    },
    [MAX8925_IRQ_GPM_SW_F] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 6,
    },
    [MAX8925_IRQ_GPM_SW_R] = {
        .reg        = MAX8925_ON_OFF_IRQ1,
        .mask_reg   = MAX8925_ON_OFF_IRQ1_MASK,
        .offs       = 1 << 7,
    },
    [MAX8925_IRQ_GPM_SYSCKEN_F] = {
        .reg        = MAX8925_ON_OFF_IRQ2,
        .mask_reg   = MAX8925_ON_OFF_IRQ2_MASK,
        .offs       = 1 << 0,
    },
    [MAX8925_IRQ_GPM_SYSCKEN_R] = {
        .reg        = MAX8925_ON_OFF_IRQ2,
        .mask_reg   = MAX8925_ON_OFF_IRQ2_MASK,
        .offs       = 1 << 1,
    },
    [MAX8925_IRQ_RTC_ALARM1] = {
        .reg        = MAX8925_RTC_IRQ,
        .mask_reg   = MAX8925_RTC_IRQ_MASK,
        .offs       = 1 << 2,
        .flags      = FLAGS_RTC,
    },
    [MAX8925_IRQ_RTC_ALARM0] = {
        .reg        = MAX8925_RTC_IRQ,
        .mask_reg   = MAX8925_RTC_IRQ_MASK,
        .offs       = 1 << 3,
        .flags      = FLAGS_RTC,
    },
    [MAX8925_IRQ_TSC_STICK] = {
        .reg        = MAX8925_TSC_IRQ,
        .mask_reg   = MAX8925_TSC_IRQ_MASK,
        .offs       = 1 << 0,
        .flags      = FLAGS_ADC,
        .tsc_irq    = 1,
    },
    [MAX8925_IRQ_TSC_NSTICK] = {
        .reg        = MAX8925_TSC_IRQ,
        .mask_reg   = MAX8925_TSC_IRQ_MASK,
        .offs       = 1 << 1,
        .flags      = FLAGS_ADC,
        .tsc_irq    = 1,
    },
};

static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip,
                              int irq)
{
    return &max8925_irqs[irq - chip->irq_base];
}

static irqreturn_t max8925_irq(int irq, void *data)
{
    struct max8925_chip *chip = data;
    struct max8925_irq_data *irq_data;
    struct i2c_client *i2c;
    int read_reg = -1, value = 0;
    int i;

    for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
        irq_data = &max8925_irqs[i];
        /* TSC IRQ should be serviced in max8925_tsc_irq() */
        if (irq_data->tsc_irq)
            continue;
        if (irq_data->flags == FLAGS_RTC)
            i2c = chip->rtc;
        else if (irq_data->flags == FLAGS_ADC)
            i2c = chip->adc;
        else
            i2c = chip->i2c;
        if (read_reg != irq_data->reg) {
            read_reg = irq_data->reg;
            value = max8925_reg_read(i2c, irq_data->reg);
        }
        if (value & irq_data->enable)
            handle_nested_irq(chip->irq_base + i);
    }
    return IRQ_HANDLED;
}

static irqreturn_t max8925_tsc_irq(int irq, void *data)
{
    struct max8925_chip *chip = data;
    struct max8925_irq_data *irq_data;
    struct i2c_client *i2c;
    int read_reg = -1, value = 0;
    int i;

    for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
        irq_data = &max8925_irqs[i];
        /* non TSC IRQ should be serviced in max8925_irq() */
        if (!irq_data->tsc_irq)
            continue;
        if (irq_data->flags == FLAGS_RTC)
            i2c = chip->rtc;
        else if (irq_data->flags == FLAGS_ADC)
            i2c = chip->adc;
        else
            i2c = chip->i2c;
        if (read_reg != irq_data->reg) {
            read_reg = irq_data->reg;
            value = max8925_reg_read(i2c, irq_data->reg);
        }
        if (value & irq_data->enable)
            handle_nested_irq(chip->irq_base + i);
    }
    return IRQ_HANDLED;
}

static void max8925_irq_lock(struct irq_data *data)
{
    struct max8925_chip *chip = irq_data_get_irq_chip_data(data);

    mutex_lock(&chip->irq_lock);
}

static void max8925_irq_sync_unlock(struct irq_data *data)
{
    struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
    struct max8925_irq_data *irq_data;
    static unsigned char cache_chg[2] = {0xff, 0xff};
    static unsigned char cache_on[2] = {0xff, 0xff};
    static unsigned char cache_rtc = 0xff, cache_tsc = 0xff;
    unsigned char irq_chg[2], irq_on[2];
    unsigned char irq_rtc, irq_tsc;
    int i;

    /* Load cached value. In initial, all IRQs are masked */
    irq_chg[0] = cache_chg[0];
    irq_chg[1] = cache_chg[1];
    irq_on[0] = cache_on[0];
    irq_on[1] = cache_on[1];
    irq_rtc = cache_rtc;
    irq_tsc = cache_tsc;
    for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
        irq_data = &max8925_irqs[i];
        /* 1 -- disable, 0 -- enable */
        switch (irq_data->mask_reg) {
        case MAX8925_CHG_IRQ1_MASK:
            irq_chg[0] &= ~irq_data->enable;
            break;
        case MAX8925_CHG_IRQ2_MASK:
            irq_chg[1] &= ~irq_data->enable;
            break;
        case MAX8925_ON_OFF_IRQ1_MASK:
            irq_on[0] &= ~irq_data->enable;
            break;
        case MAX8925_ON_OFF_IRQ2_MASK:
            irq_on[1] &= ~irq_data->enable;
            break;
        case MAX8925_RTC_IRQ_MASK:
            irq_rtc &= ~irq_data->enable;
            break;
        case MAX8925_TSC_IRQ_MASK:
            irq_tsc &= ~irq_data->enable;
            break;
        default:
            dev_err(chip->dev, "wrong IRQ\n");
            break;
        }
    }
    /* update mask into registers */
    if (cache_chg[0] != irq_chg[0]) {
        cache_chg[0] = irq_chg[0];
        max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK,
            irq_chg[0]);
    }
    if (cache_chg[1] != irq_chg[1]) {
        cache_chg[1] = irq_chg[1];
        max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK,
            irq_chg[1]);
    }
    if (cache_on[0] != irq_on[0]) {
        cache_on[0] = irq_on[0];
        max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK,
                irq_on[0]);
    }
    if (cache_on[1] != irq_on[1]) {
        cache_on[1] = irq_on[1];
        max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK,
                irq_on[1]);
    }
    if (cache_rtc != irq_rtc) {
        cache_rtc = irq_rtc;
        max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc);
    }
    if (cache_tsc != irq_tsc) {
        cache_tsc = irq_tsc;
        max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc);
    }

    mutex_unlock(&chip->irq_lock);
}

static void max8925_irq_enable(struct irq_data *data)
{
    struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
    max8925_irqs[data->irq - chip->irq_base].enable
        = max8925_irqs[data->irq - chip->irq_base].offs;
}

static void max8925_irq_disable(struct irq_data *data)
{
    struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
    max8925_irqs[data->irq - chip->irq_base].enable = 0;
}

static struct irq_chip max8925_irq_chip = {
    .name       = "max8925",
    .irq_bus_lock   = max8925_irq_lock,
    .irq_bus_sync_unlock = max8925_irq_sync_unlock,
    .irq_enable = max8925_irq_enable,
    .irq_disable    = max8925_irq_disable,
};

static int max8925_irq_init(struct max8925_chip *chip, int irq,
                struct max8925_platform_data *pdata)
{
    unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
    int i, ret;
    int __irq;

    if (!pdata || !pdata->irq_base) {
        dev_warn(chip->dev, "No interrupt support on IRQ base\n");
        return -EINVAL;
    }
    /* clear all interrupts */
    max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1);
    max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2);
    max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1);
    max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2);
    max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ);
    max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
    /* mask all interrupts except for TSC */
    max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0);
    max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0);
    max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff);
    max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff);
    max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff);
    max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff);
    max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff);

    mutex_init(&chip->irq_lock);
    chip->core_irq = irq;
    chip->irq_base = pdata->irq_base;

    /* register with genirq */
    for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
        __irq = i + chip->irq_base;
        irq_set_chip_data(__irq, chip);
        irq_set_chip_and_handler(__irq, &max8925_irq_chip,
                     handle_edge_irq);
        irq_set_nested_thread(__irq, 1);
#ifdef CONFIG_ARM
        set_irq_flags(__irq, IRQF_VALID);
#else
        irq_set_noprobe(__irq);
#endif
    }
    if (!irq) {
        dev_warn(chip->dev, "No interrupt support on core IRQ\n");
        goto tsc_irq;
    }

    ret = request_threaded_irq(irq, NULL, max8925_irq, flags | IRQF_ONESHOT,
                   "max8925", chip);
    if (ret) {
        dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret);
        chip->core_irq = 0;
    }

tsc_irq:
    /* mask TSC interrupt */
    max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0x0f);

    if (!pdata->tsc_irq) {
        dev_warn(chip->dev, "No interrupt support on TSC IRQ\n");
        return 0;
    }
    chip->tsc_irq = pdata->tsc_irq;

    ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq,
                   flags | IRQF_ONESHOT, "max8925-tsc", chip);
    if (ret) {
        dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret);
        chip->tsc_irq = 0;
    }
    return 0;
}

static void __devinit init_regulator(struct max8925_chip *chip,
                     struct max8925_platform_data *pdata)
{
    int ret;

    if (!pdata)
        return;
    if (pdata->sd1) {
        reg_devs[0].platform_data = pdata->sd1;
        reg_devs[0].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->sd2) {
        reg_devs[1].platform_data = pdata->sd2;
        reg_devs[1].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->sd3) {
        reg_devs[2].platform_data = pdata->sd3;
        reg_devs[2].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo1) {
        reg_devs[3].platform_data = pdata->ldo1;
        reg_devs[3].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo2) {
        reg_devs[4].platform_data = pdata->ldo2;
        reg_devs[4].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo3) {
        reg_devs[5].platform_data = pdata->ldo3;
        reg_devs[5].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo4) {
        reg_devs[6].platform_data = pdata->ldo4;
        reg_devs[6].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo5) {
        reg_devs[7].platform_data = pdata->ldo5;
        reg_devs[7].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo6) {
        reg_devs[8].platform_data = pdata->ldo6;
        reg_devs[8].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo7) {
        reg_devs[9].platform_data = pdata->ldo7;
        reg_devs[9].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo8) {
        reg_devs[10].platform_data = pdata->ldo8;
        reg_devs[10].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo9) {
        reg_devs[11].platform_data = pdata->ldo9;
        reg_devs[11].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo10) {
        reg_devs[12].platform_data = pdata->ldo10;
        reg_devs[12].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo11) {
        reg_devs[13].platform_data = pdata->ldo11;
        reg_devs[13].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo12) {
        reg_devs[14].platform_data = pdata->ldo12;
        reg_devs[14].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo13) {
        reg_devs[15].platform_data = pdata->ldo13;
        reg_devs[15].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo14) {
        reg_devs[16].platform_data = pdata->ldo14;
        reg_devs[16].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo15) {
        reg_devs[17].platform_data = pdata->ldo15;
        reg_devs[17].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo16) {
        reg_devs[18].platform_data = pdata->ldo16;
        reg_devs[18].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo17) {
        reg_devs[19].platform_data = pdata->ldo17;
        reg_devs[19].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo18) {
        reg_devs[20].platform_data = pdata->ldo18;
        reg_devs[20].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo19) {
        reg_devs[21].platform_data = pdata->ldo19;
        reg_devs[21].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo20) {
        reg_devs[22].platform_data = pdata->ldo20;
        reg_devs[22].pdata_size = sizeof(struct regulator_init_data);
    }
    ret = mfd_add_devices(chip->dev, 0, reg_devs, ARRAY_SIZE(reg_devs),
                  NULL, 0, NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add regulator subdev\n");
        return;
    }
}

int __devinit max8925_device_init(struct max8925_chip *chip,
                  struct max8925_platform_data *pdata)
{
    int ret;

    max8925_irq_init(chip, chip->i2c->irq, pdata);

    if (pdata && (pdata->power || pdata->touch)) {
        /* enable ADC to control internal reference */
        max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1);
        /* enable internal reference for ADC */
        max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2);
        /* check for internal reference IRQ */
        do {
            ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
        } while (ret & MAX8925_NREF_OK);
        /* enaable ADC scheduler, interval is 1 second */
        max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2);
    }

    /* enable Momentary Power Loss */
    max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4);

    ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
                  ARRAY_SIZE(rtc_devs),
                  &rtc_resources[0], chip->irq_base, NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add rtc subdev\n");
        goto out;
    }

    ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
                  ARRAY_SIZE(onkey_devs),
                  &onkey_resources[0], 0, NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add onkey subdev\n");
        goto out_dev;
    }

    init_regulator(chip, pdata);

    if (pdata && pdata->backlight) {
        bk_devs[0].platform_data = &pdata->backlight;
        bk_devs[0].pdata_size = sizeof(struct max8925_backlight_pdata);
    }
    ret = mfd_add_devices(chip->dev, 0, bk_devs, ARRAY_SIZE(bk_devs),
                  NULL, 0, NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add backlight subdev\n");
        goto out_dev;
    }

    if (pdata && pdata->power) {
        ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
                    ARRAY_SIZE(power_devs),
                      &power_supply_resources[0], 0, NULL);
        if (ret < 0) {
            dev_err(chip->dev, "Failed to add power supply "
                "subdev\n");
            goto out_dev;
        }
    }

    if (pdata && pdata->touch) {
        ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
                      ARRAY_SIZE(touch_devs),
                      &touch_resources[0], 0, NULL);
        if (ret < 0) {
            dev_err(chip->dev, "Failed to add touch subdev\n");
            goto out_dev;
        }
    }

    return 0;
out_dev:
    mfd_remove_devices(chip->dev);
out:
    return ret;
}

void __devexit max8925_device_exit(struct max8925_chip *chip)
{
    if (chip->core_irq)
        free_irq(chip->core_irq, chip);
    if (chip->tsc_irq)
        free_irq(chip->tsc_irq, chip);
    mfd_remove_devices(chip->dev);
}


MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
MODULE_AUTHOR("Haojian Zhuang <[email protected]");
MODULE_LICENSE("GPL");