88pm860x-core.c

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/*
 * Base driver for Marvell 88PM8607
 *
 * Copyright (C) 2009 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/err.h>
#include <linux/i2c.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/mfd/core.h>
#include <linux/mfd/88pm860x.h>
#include <linux/regulator/machine.h>
#include <linux/power/charger-manager.h>

#define INT_STATUS_NUM          3

static struct resource bk0_resources[] __devinitdata = {
    {2, 2, "duty cycle", IORESOURCE_REG, },
    {3, 3, "always on",  IORESOURCE_REG, },
    {3, 3, "current",    IORESOURCE_REG, },
};
static struct resource bk1_resources[] __devinitdata = {
    {4, 4, "duty cycle", IORESOURCE_REG, },
    {5, 5, "always on",  IORESOURCE_REG, },
    {5, 5, "current",    IORESOURCE_REG, },
};
static struct resource bk2_resources[] __devinitdata = {
    {6, 6, "duty cycle", IORESOURCE_REG, },
    {7, 7, "always on",  IORESOURCE_REG, },
    {5, 5, "current",    IORESOURCE_REG, },
};

static struct resource led0_resources[] __devinitdata = {
    /* RGB1 Red LED */
    {0xd, 0xd, "control", IORESOURCE_REG, },
    {0xc, 0xc, "blink",   IORESOURCE_REG, },
};
static struct resource led1_resources[] __devinitdata = {
    /* RGB1 Green LED */
    {0xe, 0xe, "control", IORESOURCE_REG, },
    {0xc, 0xc, "blink",   IORESOURCE_REG, },
};
static struct resource led2_resources[] __devinitdata = {
    /* RGB1 Blue LED */
    {0xf, 0xf, "control", IORESOURCE_REG, },
    {0xc, 0xc, "blink",   IORESOURCE_REG, },
};
static struct resource led3_resources[] __devinitdata = {
    /* RGB2 Red LED */
    {0x9, 0x9, "control", IORESOURCE_REG, },
    {0x8, 0x8, "blink",   IORESOURCE_REG, },
};
static struct resource led4_resources[] __devinitdata = {
    /* RGB2 Green LED */
    {0xa, 0xa, "control", IORESOURCE_REG, },
    {0x8, 0x8, "blink",   IORESOURCE_REG, },
};
static struct resource led5_resources[] __devinitdata = {
    /* RGB2 Blue LED */
    {0xb, 0xb, "control", IORESOURCE_REG, },
    {0x8, 0x8, "blink",   IORESOURCE_REG, },
};

static struct resource buck1_resources[] __devinitdata = {
    {0x24, 0x24, "buck set", IORESOURCE_REG, },
};
static struct resource buck2_resources[] __devinitdata = {
    {0x25, 0x25, "buck set", IORESOURCE_REG, },
};
static struct resource buck3_resources[] __devinitdata = {
    {0x26, 0x26, "buck set", IORESOURCE_REG, },
};
static struct resource ldo1_resources[] __devinitdata = {
    {0x10, 0x10, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo2_resources[] __devinitdata = {
    {0x11, 0x11, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo3_resources[] __devinitdata = {
    {0x12, 0x12, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo4_resources[] __devinitdata = {
    {0x13, 0x13, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo5_resources[] __devinitdata = {
    {0x14, 0x14, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo6_resources[] __devinitdata = {
    {0x15, 0x15, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo7_resources[] __devinitdata = {
    {0x16, 0x16, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo8_resources[] __devinitdata = {
    {0x17, 0x17, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo9_resources[] __devinitdata = {
    {0x18, 0x18, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo10_resources[] __devinitdata = {
    {0x19, 0x19, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo12_resources[] __devinitdata = {
    {0x1a, 0x1a, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo_vibrator_resources[] __devinitdata = {
    {0x28, 0x28, "ldo set", IORESOURCE_REG, },
};
static struct resource ldo14_resources[] __devinitdata = {
    {0x1b, 0x1b, "ldo set", IORESOURCE_REG, },
};

static struct resource touch_resources[] __devinitdata = {
    {PM8607_IRQ_PEN, PM8607_IRQ_PEN, "touch", IORESOURCE_IRQ,},
};

static struct resource onkey_resources[] __devinitdata = {
    {PM8607_IRQ_ONKEY, PM8607_IRQ_ONKEY, "onkey", IORESOURCE_IRQ,},
};

static struct resource codec_resources[] __devinitdata = {
    /* Headset microphone insertion or removal */
    {PM8607_IRQ_MICIN,   PM8607_IRQ_MICIN,   "micin",   IORESOURCE_IRQ,},
    /* Hook-switch press or release */
    {PM8607_IRQ_HOOK,    PM8607_IRQ_HOOK,    "hook",    IORESOURCE_IRQ,},
    /* Headset insertion or removal */
    {PM8607_IRQ_HEADSET, PM8607_IRQ_HEADSET, "headset", IORESOURCE_IRQ,},
    /* Audio short */
    {PM8607_IRQ_AUDIO_SHORT, PM8607_IRQ_AUDIO_SHORT, "audio-short", IORESOURCE_IRQ,},
};

static struct resource battery_resources[] __devinitdata = {
    {PM8607_IRQ_CC,  PM8607_IRQ_CC,  "columb counter", IORESOURCE_IRQ,},
    {PM8607_IRQ_BAT, PM8607_IRQ_BAT, "battery",        IORESOURCE_IRQ,},
};

static struct resource charger_resources[] __devinitdata = {
    {PM8607_IRQ_CHG,  PM8607_IRQ_CHG,  "charger detect",  IORESOURCE_IRQ,},
    {PM8607_IRQ_CHG_DONE,  PM8607_IRQ_CHG_DONE,  "charging done",       IORESOURCE_IRQ,},
    {PM8607_IRQ_CHG_FAIL,  PM8607_IRQ_CHG_FAIL,  "charging timeout",    IORESOURCE_IRQ,},
    {PM8607_IRQ_CHG_FAULT, PM8607_IRQ_CHG_FAULT, "charging fault",      IORESOURCE_IRQ,},
    {PM8607_IRQ_GPADC1,    PM8607_IRQ_GPADC1,    "battery temperature", IORESOURCE_IRQ,},
    {PM8607_IRQ_VBAT, PM8607_IRQ_VBAT, "battery voltage", IORESOURCE_IRQ,},
    {PM8607_IRQ_VCHG, PM8607_IRQ_VCHG, "vchg voltage",    IORESOURCE_IRQ,},
};

static struct resource rtc_resources[] __devinitdata = {
    {PM8607_IRQ_RTC, PM8607_IRQ_RTC, "rtc", IORESOURCE_IRQ,},
};

static struct mfd_cell bk_devs[] __devinitdata = {
    {
        .name = "88pm860x-backlight",
        .id = 0,
        .num_resources = ARRAY_SIZE(bk0_resources),
        .resources = bk0_resources,
    }, {
        .name = "88pm860x-backlight",
        .id = 1,
        .num_resources = ARRAY_SIZE(bk1_resources),
        .resources = bk1_resources,
    }, {
        .name = "88pm860x-backlight",
        .id = 2,
        .num_resources = ARRAY_SIZE(bk2_resources),
        .resources = bk2_resources,
    },
};

static struct mfd_cell led_devs[] __devinitdata = {
    {
        .name = "88pm860x-led",
        .id = 0,
        .num_resources = ARRAY_SIZE(led0_resources),
        .resources = led0_resources,
    }, {
        .name = "88pm860x-led",
        .id = 1,
        .num_resources = ARRAY_SIZE(led1_resources),
        .resources = led1_resources,
    }, {
        .name = "88pm860x-led",
        .id = 2,
        .num_resources = ARRAY_SIZE(led2_resources),
        .resources = led2_resources,
    }, {
        .name = "88pm860x-led",
        .id = 3,
        .num_resources = ARRAY_SIZE(led3_resources),
        .resources = led3_resources,
    }, {
        .name = "88pm860x-led",
        .id = 4,
        .num_resources = ARRAY_SIZE(led4_resources),
        .resources = led4_resources,
    }, {
        .name = "88pm860x-led",
        .id = 5,
        .num_resources = ARRAY_SIZE(led5_resources),
        .resources = led5_resources,
    },
};

static struct mfd_cell reg_devs[] __devinitdata = {
    {
        .name = "88pm860x-regulator",
        .id = 0,
        .num_resources = ARRAY_SIZE(buck1_resources),
        .resources = buck1_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 1,
        .num_resources = ARRAY_SIZE(buck2_resources),
        .resources = buck2_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 2,
        .num_resources = ARRAY_SIZE(buck3_resources),
        .resources = buck3_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 3,
        .num_resources = ARRAY_SIZE(ldo1_resources),
        .resources = ldo1_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 4,
        .num_resources = ARRAY_SIZE(ldo2_resources),
        .resources = ldo2_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 5,
        .num_resources = ARRAY_SIZE(ldo3_resources),
        .resources = ldo3_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 6,
        .num_resources = ARRAY_SIZE(ldo4_resources),
        .resources = ldo4_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 7,
        .num_resources = ARRAY_SIZE(ldo5_resources),
        .resources = ldo5_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 8,
        .num_resources = ARRAY_SIZE(ldo6_resources),
        .resources = ldo6_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 9,
        .num_resources = ARRAY_SIZE(ldo7_resources),
        .resources = ldo7_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 10,
        .num_resources = ARRAY_SIZE(ldo8_resources),
        .resources = ldo8_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 11,
        .num_resources = ARRAY_SIZE(ldo9_resources),
        .resources = ldo9_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 12,
        .num_resources = ARRAY_SIZE(ldo10_resources),
        .resources = ldo10_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 13,
        .num_resources = ARRAY_SIZE(ldo12_resources),
        .resources = ldo12_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 14,
        .num_resources = ARRAY_SIZE(ldo_vibrator_resources),
        .resources = ldo_vibrator_resources,
    }, {
        .name = "88pm860x-regulator",
        .id = 15,
        .num_resources = ARRAY_SIZE(ldo14_resources),
        .resources = ldo14_resources,
    },
};

static struct mfd_cell touch_devs[] = {
    {"88pm860x-touch", -1,},
};

static struct mfd_cell onkey_devs[] = {
    {"88pm860x-onkey", -1,},
};

static struct mfd_cell codec_devs[] = {
    {"88pm860x-codec", -1,},
};

static struct regulator_consumer_supply preg_supply[] = {
    REGULATOR_SUPPLY("preg", "charger-manager"),
};

static struct regulator_init_data preg_init_data = {
    .num_consumer_supplies  = ARRAY_SIZE(preg_supply),
    .consumer_supplies  = &preg_supply[0],
};

static struct charger_regulator chg_desc_regulator_data[] = {
    { .regulator_name = "preg", },
};

static struct mfd_cell power_devs[] = {
    {"88pm860x-battery", -1,},
    {"88pm860x-charger", -1,},
    {"88pm860x-preg",    -1,},
    {"charger-manager", -1,},
};

static struct mfd_cell rtc_devs[] = {
    {"88pm860x-rtc", -1,},
};


struct pm860x_irq_data {
    int reg;
    int mask_reg;
    int enable;     /* enable or not */
    int offs;       /* bit offset in mask register */
};

static struct pm860x_irq_data pm860x_irqs[] = {
    [PM8607_IRQ_ONKEY] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 0,
    },
    [PM8607_IRQ_EXTON] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 1,
    },
    [PM8607_IRQ_CHG] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 2,
    },
    [PM8607_IRQ_BAT] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 3,
    },
    [PM8607_IRQ_RTC] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 4,
    },
    [PM8607_IRQ_CC] = {
        .reg        = PM8607_INT_STATUS1,
        .mask_reg   = PM8607_INT_MASK_1,
        .offs       = 1 << 5,
    },
    [PM8607_IRQ_VBAT] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 0,
    },
    [PM8607_IRQ_VCHG] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 1,
    },
    [PM8607_IRQ_VSYS] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 2,
    },
    [PM8607_IRQ_TINT] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 3,
    },
    [PM8607_IRQ_GPADC0] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 4,
    },
    [PM8607_IRQ_GPADC1] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 5,
    },
    [PM8607_IRQ_GPADC2] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 6,
    },
    [PM8607_IRQ_GPADC3] = {
        .reg        = PM8607_INT_STATUS2,
        .mask_reg   = PM8607_INT_MASK_2,
        .offs       = 1 << 7,
    },
    [PM8607_IRQ_AUDIO_SHORT] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 0,
    },
    [PM8607_IRQ_PEN] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 1,
    },
    [PM8607_IRQ_HEADSET] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 2,
    },
    [PM8607_IRQ_HOOK] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 3,
    },
    [PM8607_IRQ_MICIN] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 4,
    },
    [PM8607_IRQ_CHG_FAIL] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 5,
    },
    [PM8607_IRQ_CHG_DONE] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 6,
    },
    [PM8607_IRQ_CHG_FAULT] = {
        .reg        = PM8607_INT_STATUS3,
        .mask_reg   = PM8607_INT_MASK_3,
        .offs       = 1 << 7,
    },
};

static irqreturn_t pm860x_irq(int irq, void *data)
{
    struct pm860x_chip *chip = data;
    struct pm860x_irq_data *irq_data;
    struct i2c_client *i2c;
    int read_reg = -1, value = 0;
    int i;

    i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
    for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
        irq_data = &pm860x_irqs[i];
        if (read_reg != irq_data->reg) {
            read_reg = irq_data->reg;
            value = pm860x_reg_read(i2c, irq_data->reg);
        }
        if (value & irq_data->enable)
            handle_nested_irq(chip->irq_base + i);
    }
    return IRQ_HANDLED;
}

static void pm860x_irq_lock(struct irq_data *data)
{
    struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);

    mutex_lock(&chip->irq_lock);
}

static void pm860x_irq_sync_unlock(struct irq_data *data)
{
    struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);
    struct pm860x_irq_data *irq_data;
    struct i2c_client *i2c;
    static unsigned char cached[3] = {0x0, 0x0, 0x0};
    unsigned char mask[3];
    int i;

    i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
    /* Load cached value. In initial, all IRQs are masked */
    for (i = 0; i < 3; i++)
        mask[i] = cached[i];
    for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
        irq_data = &pm860x_irqs[i];
        switch (irq_data->mask_reg) {
        case PM8607_INT_MASK_1:
            mask[0] &= ~irq_data->offs;
            mask[0] |= irq_data->enable;
            break;
        case PM8607_INT_MASK_2:
            mask[1] &= ~irq_data->offs;
            mask[1] |= irq_data->enable;
            break;
        case PM8607_INT_MASK_3:
            mask[2] &= ~irq_data->offs;
            mask[2] |= irq_data->enable;
            break;
        default:
            dev_err(chip->dev, "wrong IRQ\n");
            break;
        }
    }
    /* update mask into registers */
    for (i = 0; i < 3; i++) {
        if (mask[i] != cached[i]) {
            cached[i] = mask[i];
            pm860x_reg_write(i2c, PM8607_INT_MASK_1 + i, mask[i]);
        }
    }

    mutex_unlock(&chip->irq_lock);
}

static void pm860x_irq_enable(struct irq_data *data)
{
    pm860x_irqs[data->hwirq].enable = pm860x_irqs[data->hwirq].offs;
}

static void pm860x_irq_disable(struct irq_data *data)
{
    pm860x_irqs[data->hwirq].enable = 0;
}

static struct irq_chip pm860x_irq_chip = {
    .name       = "88pm860x",
    .irq_bus_lock   = pm860x_irq_lock,
    .irq_bus_sync_unlock = pm860x_irq_sync_unlock,
    .irq_enable = pm860x_irq_enable,
    .irq_disable    = pm860x_irq_disable,
};

static int pm860x_irq_domain_map(struct irq_domain *d, unsigned int virq,
                 irq_hw_number_t hw)
{
    irq_set_chip_data(virq, d->host_data);
    irq_set_chip_and_handler(virq, &pm860x_irq_chip, handle_edge_irq);
    irq_set_nested_thread(virq, 1);
#ifdef CONFIG_ARM
    set_irq_flags(virq, IRQF_VALID);
#else
    irq_set_noprobe(virq);
#endif
    return 0;
}

static struct irq_domain_ops pm860x_irq_domain_ops = {
    .map    = pm860x_irq_domain_map,
    .xlate  = irq_domain_xlate_onetwocell,
};

static int __devinit device_irq_init(struct pm860x_chip *chip,
                     struct pm860x_platform_data *pdata)
{
    struct i2c_client *i2c = (chip->id == CHIP_PM8607) ? chip->client \
                : chip->companion;
    unsigned char status_buf[INT_STATUS_NUM];
    unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
    int data, mask, ret = -EINVAL;
    int nr_irqs, irq_base = -1;
    struct device_node *node = i2c->dev.of_node;

    mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR
        | PM8607_B0_MISC1_INT_MASK;
    data = 0;
    chip->irq_mode = 0;
    if (pdata && pdata->irq_mode) {
        /*
         * irq_mode defines the way of clearing interrupt. If it's 1,
         * clear IRQ by write. Otherwise, clear it by read.
         * This control bit is valid from 88PM8607 B0 steping.
         */
        data |= PM8607_B0_MISC1_INT_CLEAR;
        chip->irq_mode = 1;
    }
    ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data);
    if (ret < 0)
        goto out;

    /* mask all IRQs */
    memset(status_buf, 0, INT_STATUS_NUM);
    ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1,
                INT_STATUS_NUM, status_buf);
    if (ret < 0)
        goto out;

    if (chip->irq_mode) {
        /* clear interrupt status by write */
        memset(status_buf, 0xFF, INT_STATUS_NUM);
        ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
                    INT_STATUS_NUM, status_buf);
    } else {
        /* clear interrupt status by read */
        ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
                    INT_STATUS_NUM, status_buf);
    }
    if (ret < 0)
        goto out;

    mutex_init(&chip->irq_lock);

    if (pdata && pdata->irq_base)
        irq_base = pdata->irq_base;
    nr_irqs = ARRAY_SIZE(pm860x_irqs);
    chip->irq_base = irq_alloc_descs(irq_base, 0, nr_irqs, 0);
    if (chip->irq_base < 0) {
        dev_err(&i2c->dev, "Failed to allocate interrupts, ret:%d\n",
            chip->irq_base);
        ret = -EBUSY;
        goto out;
    }
    irq_domain_add_legacy(node, nr_irqs, chip->irq_base, 0,
                  &pm860x_irq_domain_ops, chip);
    chip->core_irq = i2c->irq;
    if (!chip->core_irq)
        goto out;

    ret = request_threaded_irq(chip->core_irq, NULL, pm860x_irq, flags | IRQF_ONESHOT,
                   "88pm860x", chip);
    if (ret) {
        dev_err(chip->dev, "Failed to request IRQ: %d\n", ret);
        chip->core_irq = 0;
    }

    return 0;
out:
    chip->core_irq = 0;
    return ret;
}

static void device_irq_exit(struct pm860x_chip *chip)
{
    if (chip->core_irq)
        free_irq(chip->core_irq, chip);
}

int pm8606_osc_enable(struct pm860x_chip *chip, unsigned short client)
{
    int ret = -EIO;
    struct i2c_client *i2c = (chip->id == CHIP_PM8606) ?
        chip->client : chip->companion;

    dev_dbg(chip->dev, "%s(B): client=0x%x\n", __func__, client);
    dev_dbg(chip->dev, "%s(B): vote=0x%x status=%d\n",
            __func__, chip->osc_vote,
            chip->osc_status);

    mutex_lock(&chip->osc_lock);
    /* Update voting status */
    chip->osc_vote |= client;
    /* If reference group is off - turn on*/
    if (chip->osc_status != PM8606_REF_GP_OSC_ON) {
        chip->osc_status = PM8606_REF_GP_OSC_UNKNOWN;
        /* Enable Reference group Vsys */
        if (pm860x_set_bits(i2c, PM8606_VSYS,
                PM8606_VSYS_EN, PM8606_VSYS_EN))
            goto out;

        /*Enable Internal Oscillator */
        if (pm860x_set_bits(i2c, PM8606_MISC,
                PM8606_MISC_OSC_EN, PM8606_MISC_OSC_EN))
            goto out;
        /* Update status (only if writes succeed) */
        chip->osc_status = PM8606_REF_GP_OSC_ON;
    }
    mutex_unlock(&chip->osc_lock);

    dev_dbg(chip->dev, "%s(A): vote=0x%x status=%d ret=%d\n",
            __func__, chip->osc_vote,
            chip->osc_status, ret);
    return 0;
out:
    mutex_unlock(&chip->osc_lock);
    return ret;
}
EXPORT_SYMBOL(pm8606_osc_enable);

int pm8606_osc_disable(struct pm860x_chip *chip, unsigned short client)
{
    int ret = -EIO;
    struct i2c_client *i2c = (chip->id == CHIP_PM8606) ?
        chip->client : chip->companion;

    dev_dbg(chip->dev, "%s(B): client=0x%x\n", __func__, client);
    dev_dbg(chip->dev, "%s(B): vote=0x%x status=%d\n",
            __func__, chip->osc_vote,
            chip->osc_status);

    mutex_lock(&chip->osc_lock);
    /*Update voting status */
    chip->osc_vote &= ~(client);
    /* If reference group is off and this is the last client to release
     * - turn off */
    if ((chip->osc_status != PM8606_REF_GP_OSC_OFF) &&
            (chip->osc_vote == REF_GP_NO_CLIENTS)) {
        chip->osc_status = PM8606_REF_GP_OSC_UNKNOWN;
        /* Disable Reference group Vsys */
        if (pm860x_set_bits(i2c, PM8606_VSYS, PM8606_VSYS_EN, 0))
            goto out;
        /* Disable Internal Oscillator */
        if (pm860x_set_bits(i2c, PM8606_MISC, PM8606_MISC_OSC_EN, 0))
            goto out;
        chip->osc_status = PM8606_REF_GP_OSC_OFF;
    }
    mutex_unlock(&chip->osc_lock);

    dev_dbg(chip->dev, "%s(A): vote=0x%x status=%d ret=%d\n",
            __func__, chip->osc_vote,
            chip->osc_status, ret);
    return 0;
out:
    mutex_unlock(&chip->osc_lock);
    return ret;
}
EXPORT_SYMBOL(pm8606_osc_disable);

static void __devinit device_osc_init(struct i2c_client *i2c)
{
    struct pm860x_chip *chip = i2c_get_clientdata(i2c);

    mutex_init(&chip->osc_lock);
    /* init portofino reference group voting and status */
    /* Disable Reference group Vsys */
    pm860x_set_bits(i2c, PM8606_VSYS, PM8606_VSYS_EN, 0);
    /* Disable Internal Oscillator */
    pm860x_set_bits(i2c, PM8606_MISC, PM8606_MISC_OSC_EN, 0);

    chip->osc_vote = REF_GP_NO_CLIENTS;
    chip->osc_status = PM8606_REF_GP_OSC_OFF;
}

static void __devinit device_bk_init(struct pm860x_chip *chip,
                     struct pm860x_platform_data *pdata)
{
    int ret, i;

    if (pdata && pdata->backlight) {
        if (pdata->num_backlights > ARRAY_SIZE(bk_devs))
            pdata->num_backlights = ARRAY_SIZE(bk_devs);
        for (i = 0; i < pdata->num_backlights; i++) {
            bk_devs[i].platform_data = &pdata->backlight[i];
            bk_devs[i].pdata_size =
                sizeof(struct pm860x_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");
}

static void __devinit device_led_init(struct pm860x_chip *chip,
                      struct pm860x_platform_data *pdata)
{
    int ret, i;

    if (pdata && pdata->led) {
        if (pdata->num_leds > ARRAY_SIZE(led_devs))
            pdata->num_leds = ARRAY_SIZE(led_devs);
        for (i = 0; i < pdata->num_leds; i++) {
            led_devs[i].platform_data = &pdata->led[i];
            led_devs[i].pdata_size =
                sizeof(struct pm860x_led_pdata);
        }
    }
    ret = mfd_add_devices(chip->dev, 0, led_devs,
                  ARRAY_SIZE(led_devs), NULL, 0, NULL);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to add led subdev\n");
        return;
    }
}

static void __devinit device_regulator_init(struct pm860x_chip *chip,
                        struct pm860x_platform_data *pdata)
{
    int ret;

    if (pdata == NULL)
        return;
    if (pdata->buck1) {
        reg_devs[0].platform_data = pdata->buck1;
        reg_devs[0].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->buck2) {
        reg_devs[1].platform_data = pdata->buck2;
        reg_devs[1].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->buck3) {
        reg_devs[2].platform_data = pdata->buck3;
        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->ldo12) {
        reg_devs[13].platform_data = pdata->ldo12;
        reg_devs[13].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo_vibrator) {
        reg_devs[14].platform_data = pdata->ldo_vibrator;
        reg_devs[14].pdata_size = sizeof(struct regulator_init_data);
    }
    if (pdata->ldo14) {
        reg_devs[15].platform_data = pdata->ldo14;
        reg_devs[15].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;
    }
}

static void __devinit device_rtc_init(struct pm860x_chip *chip,
                      struct pm860x_platform_data *pdata)
{
    int ret;

    if ((pdata == NULL))
        return;

    rtc_devs[0].platform_data = pdata->rtc;
    rtc_devs[0].pdata_size = sizeof(struct pm860x_rtc_pdata);
    rtc_devs[0].num_resources = ARRAY_SIZE(rtc_resources);
    rtc_devs[0].resources = &rtc_resources[0];
    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");
}

static void __devinit device_touch_init(struct pm860x_chip *chip,
                    struct pm860x_platform_data *pdata)
{
    int ret;

    if (pdata == NULL)
        return;

    touch_devs[0].platform_data = pdata->touch;
    touch_devs[0].pdata_size = sizeof(struct pm860x_touch_pdata);
    touch_devs[0].num_resources = ARRAY_SIZE(touch_resources);
    touch_devs[0].resources = &touch_resources[0];
    ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
                  ARRAY_SIZE(touch_devs), &touch_resources[0],
                  chip->irq_base, NULL);
    if (ret < 0)
        dev_err(chip->dev, "Failed to add touch subdev\n");
}

static void __devinit device_power_init(struct pm860x_chip *chip,
                    struct pm860x_platform_data *pdata)
{
    int ret;

    if (pdata == NULL)
        return;

    power_devs[0].platform_data = pdata->power;
    power_devs[0].pdata_size = sizeof(struct pm860x_power_pdata);
    power_devs[0].num_resources = ARRAY_SIZE(battery_resources);
    power_devs[0].resources = &battery_resources[0],
    ret = mfd_add_devices(chip->dev, 0, &power_devs[0], 1,
                  &battery_resources[0], chip->irq_base, NULL);
    if (ret < 0)
        dev_err(chip->dev, "Failed to add battery subdev\n");

    power_devs[1].platform_data = pdata->power;
    power_devs[1].pdata_size = sizeof(struct pm860x_power_pdata);
    power_devs[1].num_resources = ARRAY_SIZE(charger_resources);
    power_devs[1].resources = &charger_resources[0],
    ret = mfd_add_devices(chip->dev, 0, &power_devs[1], 1,
                  &charger_resources[0], chip->irq_base, NULL);
    if (ret < 0)
        dev_err(chip->dev, "Failed to add charger subdev\n");

    power_devs[2].platform_data = &preg_init_data;
    power_devs[2].pdata_size = sizeof(struct regulator_init_data);
    ret = mfd_add_devices(chip->dev, 0, &power_devs[2], 1,
                  NULL, chip->irq_base, NULL);
    if (ret < 0)
        dev_err(chip->dev, "Failed to add preg subdev\n");

    if (pdata->chg_desc) {
        pdata->chg_desc->charger_regulators =
            &chg_desc_regulator_data[0];
        pdata->chg_desc->num_charger_regulators =
            ARRAY_SIZE(chg_desc_regulator_data),
        power_devs[3].platform_data = pdata->chg_desc;
        power_devs[3].pdata_size = sizeof(*pdata->chg_desc);
        ret = mfd_add_devices(chip->dev, 0, &power_devs[3], 1,
                      NULL, chip->irq_base, NULL);
        if (ret < 0)
            dev_err(chip->dev, "Failed to add chg-manager subdev\n");
    }
}

static void __devinit device_onkey_init(struct pm860x_chip *chip,
                    struct pm860x_platform_data *pdata)
{
    int ret;

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

static void __devinit device_codec_init(struct pm860x_chip *chip,
                    struct pm860x_platform_data *pdata)
{
    int ret;

    codec_devs[0].num_resources = ARRAY_SIZE(codec_resources);
    codec_devs[0].resources = &codec_resources[0],
    ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
                  ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
                  NULL);
    if (ret < 0)
        dev_err(chip->dev, "Failed to add codec subdev\n");
}

static void __devinit device_8607_init(struct pm860x_chip *chip,
                       struct i2c_client *i2c,
                       struct pm860x_platform_data *pdata)
{
    int data, ret;

    ret = pm860x_reg_read(i2c, PM8607_CHIP_ID);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
        goto out;
    }
    switch (ret & PM8607_VERSION_MASK) {
    case 0x40:
    case 0x50:
        dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
             ret);
        break;
    default:
        dev_err(chip->dev, "Failed to detect Marvell 88PM8607. "
            "Chip ID: %02x\n", ret);
        goto out;
    }

    ret = pm860x_reg_read(i2c, PM8607_BUCK3);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
        goto out;
    }
    if (ret & PM8607_BUCK3_DOUBLE)
        chip->buck3_double = 1;

    ret = pm860x_reg_read(i2c, PM8607_B0_MISC1);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
        goto out;
    }

    if (pdata && (pdata->i2c_port == PI2C_PORT))
        data = PM8607_B0_MISC1_PI2C;
    else
        data = 0;
    ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data);
    if (ret < 0) {
        dev_err(chip->dev, "Failed to access MISC1:%d\n", ret);
        goto out;
    }

    ret = device_irq_init(chip, pdata);
    if (ret < 0)
        goto out;

    device_regulator_init(chip, pdata);
    device_rtc_init(chip, pdata);
    device_onkey_init(chip, pdata);
    device_touch_init(chip, pdata);
    device_power_init(chip, pdata);
    device_codec_init(chip, pdata);
out:
    return;
}

static void __devinit device_8606_init(struct pm860x_chip *chip,
                       struct i2c_client *i2c,
                       struct pm860x_platform_data *pdata)
{
    device_osc_init(i2c);
    device_bk_init(chip, pdata);
    device_led_init(chip, pdata);
}

static int __devinit pm860x_device_init(struct pm860x_chip *chip,
                    struct pm860x_platform_data *pdata)
{
    chip->core_irq = 0;

    switch (chip->id) {
    case CHIP_PM8606:
        device_8606_init(chip, chip->client, pdata);
        break;
    case CHIP_PM8607:
        device_8607_init(chip, chip->client, pdata);
        break;
    }

    if (chip->companion) {
        switch (chip->id) {
        case CHIP_PM8607:
            device_8606_init(chip, chip->companion, pdata);
            break;
        case CHIP_PM8606:
            device_8607_init(chip, chip->companion, pdata);
            break;
        }
    }

    return 0;
}

static void __devexit pm860x_device_exit(struct pm860x_chip *chip)
{
    device_irq_exit(chip);
    mfd_remove_devices(chip->dev);
}

static int verify_addr(struct i2c_client *i2c)
{
    unsigned short addr_8607[] = {0x30, 0x34};
    unsigned short addr_8606[] = {0x10, 0x11};
    int size, i;

    if (i2c == NULL)
        return 0;
    size = ARRAY_SIZE(addr_8606);
    for (i = 0; i < size; i++) {
        if (i2c->addr == *(addr_8606 + i))
            return CHIP_PM8606;
    }
    size = ARRAY_SIZE(addr_8607);
    for (i = 0; i < size; i++) {
        if (i2c->addr == *(addr_8607 + i))
            return CHIP_PM8607;
    }
    return 0;
}

static struct regmap_config pm860x_regmap_config = {
    .reg_bits = 8,
    .val_bits = 8,
};

static int __devinit pm860x_dt_init(struct device_node *np,
                    struct device *dev,
                    struct pm860x_platform_data *pdata)
{
    int ret;

    if (of_get_property(np, "marvell,88pm860x-irq-read-clr", NULL))
        pdata->irq_mode = 1;
    ret = of_property_read_u32(np, "marvell,88pm860x-slave-addr",
                   &pdata->companion_addr);
    if (ret) {
        dev_err(dev, "Not found \"marvell,88pm860x-slave-addr\" "
            "property\n");
        pdata->companion_addr = 0;
    }
    return 0;
}

static int __devinit pm860x_probe(struct i2c_client *client,
                  const struct i2c_device_id *id)
{
    struct pm860x_platform_data *pdata = client->dev.platform_data;
    struct device_node *node = client->dev.of_node;
    struct pm860x_chip *chip;
    int ret;

    if (node && !pdata) {
        /* parse DT to get platform data */
        pdata = devm_kzalloc(&client->dev,
                     sizeof(struct pm860x_platform_data),
                     GFP_KERNEL);
        if (!pdata)
            return -ENOMEM;
        ret = pm860x_dt_init(node, &client->dev, pdata);
        if (ret)
            goto err;
    } else if (!pdata) {
        pr_info("No platform data in %s!\n", __func__);
        return -EINVAL;
    }

    chip = kzalloc(sizeof(struct pm860x_chip), GFP_KERNEL);
    if (chip == NULL) {
        ret = -ENOMEM;
        goto err;
    }

    chip->id = verify_addr(client);
    chip->regmap = regmap_init_i2c(client, &pm860x_regmap_config);
    if (IS_ERR(chip->regmap)) {
        ret = PTR_ERR(chip->regmap);
        dev_err(&client->dev, "Failed to allocate register map: %d\n",
                ret);
        kfree(chip);
        return ret;
    }
    chip->client = client;
    i2c_set_clientdata(client, chip);
    chip->dev = &client->dev;
    dev_set_drvdata(chip->dev, chip);

    /*
     * Both client and companion client shares same platform driver.
     * Driver distinguishes them by pdata->companion_addr.
     * pdata->companion_addr is only assigned if companion chip exists.
     * At the same time, the companion_addr shouldn't equal to client
     * address.
     */
    if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
        chip->companion_addr = pdata->companion_addr;
        chip->companion = i2c_new_dummy(chip->client->adapter,
                        chip->companion_addr);
        chip->regmap_companion = regmap_init_i2c(chip->companion,
                            &pm860x_regmap_config);
        if (IS_ERR(chip->regmap_companion)) {
            ret = PTR_ERR(chip->regmap_companion);
            dev_err(&chip->companion->dev,
                "Failed to allocate register map: %d\n", ret);
            return ret;
        }
        i2c_set_clientdata(chip->companion, chip);
    }

    pm860x_device_init(chip, pdata);
    return 0;
err:
    if (node)
        devm_kfree(&client->dev, pdata);
    return ret;
}

static int __devexit pm860x_remove(struct i2c_client *client)
{
    struct pm860x_chip *chip = i2c_get_clientdata(client);

    pm860x_device_exit(chip);
    if (chip->companion) {
        regmap_exit(chip->regmap_companion);
        i2c_unregister_device(chip->companion);
    }
    regmap_exit(chip->regmap);
    kfree(chip);
    return 0;
}

#ifdef CONFIG_PM_SLEEP
static int pm860x_suspend(struct device *dev)
{
    struct i2c_client *client = container_of(dev, struct i2c_client, dev);
    struct pm860x_chip *chip = i2c_get_clientdata(client);

    if (device_may_wakeup(dev) && chip->wakeup_flag)
        enable_irq_wake(chip->core_irq);
    return 0;
}

static int pm860x_resume(struct device *dev)
{
    struct i2c_client *client = container_of(dev, struct i2c_client, dev);
    struct pm860x_chip *chip = i2c_get_clientdata(client);

    if (device_may_wakeup(dev) && chip->wakeup_flag)
        disable_irq_wake(chip->core_irq);
    return 0;
}
#endif

static SIMPLE_DEV_PM_OPS(pm860x_pm_ops, pm860x_suspend, pm860x_resume);

static const struct i2c_device_id pm860x_id_table[] = {
    { "88PM860x", 0 },
    {}
};
MODULE_DEVICE_TABLE(i2c, pm860x_id_table);

static const struct of_device_id pm860x_dt_ids[] = {
    { .compatible = "marvell,88pm860x", },
    {},
};
MODULE_DEVICE_TABLE(of, pm860x_dt_ids);

static struct i2c_driver pm860x_driver = {
    .driver = {
        .name   = "88PM860x",
        .owner  = THIS_MODULE,
        .pm     = &pm860x_pm_ops,
        .of_match_table = of_match_ptr(pm860x_dt_ids),
    },
    .probe      = pm860x_probe,
    .remove     = __devexit_p(pm860x_remove),
    .id_table   = pm860x_id_table,
};

static int __init pm860x_i2c_init(void)
{
    int ret;
    ret = i2c_add_driver(&pm860x_driver);
    if (ret != 0)
        pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
    return ret;
}
subsys_initcall(pm860x_i2c_init);

static void __exit pm860x_i2c_exit(void)
{
    i2c_del_driver(&pm860x_driver);
}
module_exit(pm860x_i2c_exit);

MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM860x");
MODULE_AUTHOR("Haojian Zhuang <[email protected]>");
MODULE_LICENSE("GPL");