net: hns: add acpi function of xge led control

[mirror_ubuntu-zesty-kernel.git] / drivers / mfd / 88pm860x-core.c

/*
 * Base driver for Marvell 88PM8607
 *
 * Copyright (C) 2009 Marvell International Ltd.
 *
 * Author: Haojian Zhuang <haojian.zhuang@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/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[] = {
        {2, 2, "duty cycle", IORESOURCE_REG, },
        {3, 3, "always on",  IORESOURCE_REG, },
        {3, 3, "current",    IORESOURCE_REG, },
};
static struct resource bk1_resources[] = {
        {4, 4, "duty cycle", IORESOURCE_REG, },
        {5, 5, "always on",  IORESOURCE_REG, },
        {5, 5, "current",    IORESOURCE_REG, },
};
static struct resource bk2_resources[] = {
        {6, 6, "duty cycle", IORESOURCE_REG, },
        {7, 7, "always on",  IORESOURCE_REG, },
        {5, 5, "current",    IORESOURCE_REG, },
};

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

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

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

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

static struct resource codec_resources[] = {
        /* 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[] = {
        {PM8607_IRQ_CC,  PM8607_IRQ_CC,  "columb counter", IORESOURCE_IRQ,},
        {PM8607_IRQ_BAT, PM8607_IRQ_BAT, "battery",        IORESOURCE_IRQ,},
};

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

static struct mfd_cell bk_devs[] = {
        {
                .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[] = {
        {
                .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[] = {
        {
                .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);
        irq_set_noprobe(virq);
        return 0;
}

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

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

        if (!pdata)
                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 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 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 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 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 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 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 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 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 const struct regmap_config pm860x_regmap_config = {
        .reg_bits = 8,
        .val_bits = 8,
};

static int 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 pm860x_probe(struct i2c_client *client)
{
        struct pm860x_platform_data *pdata = dev_get_platdata(&client->dev);
        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)
                        return ret;
        } else if (!pdata) {
                pr_info("No platform data in %s!\n", __func__);
                return -EINVAL;
        }

        chip = devm_kzalloc(&client->dev,
                            sizeof(struct pm860x_chip), GFP_KERNEL);
        if (chip == NULL)
                return -ENOMEM;

        chip->id = verify_addr(client);
        chip->regmap = devm_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);
                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);
                if (!chip->companion) {
                        dev_err(&client->dev,
                                "Failed to allocate I2C companion device\n");
                        return -ENODEV;
                }
                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);
                        i2c_unregister_device(chip->companion);
                        return ret;
                }
                i2c_set_clientdata(chip->companion, chip);
        }

        pm860x_device_init(chip, pdata);
        return 0;
}

static int 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);
        }
        return 0;
}

#ifdef CONFIG_PM_SLEEP
static int pm860x_suspend(struct device *dev)
{
        struct i2c_client *client = to_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 = to_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",
                .pm     = &pm860x_pm_ops,
                .of_match_table = pm860x_dt_ids,
        },
        .probe_new      = pm860x_probe,
        .remove         = 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 <haojian.zhuang@marvell.com>");
MODULE_LICENSE("GPL");