linux-imx

// SPDX-License-Identifier: GPL-2.0+

//

// extcon-max14577.c - MAX14577/77836 extcon driver to support MUIC

//

// Copyright (C) 2013,2014 Samsung Electronics

// Chanwoo Choi <cw00.choi@samsung.com>

// Krzysztof Kozlowski <krzk@kernel.org>

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/mfd/max14577.h>

#include <linux/mfd/max14577-private.h>

#include <linux/extcon-provider.h>

​

#define DELAY_MS_DEFAULT        17000       /* unit: millisecond */

​

enum max14577_muic_adc_debounce_time {

    ADC_DEBOUNCE_TIME_5MS = 0,

    ADC_DEBOUNCE_TIME_10MS,

    ADC_DEBOUNCE_TIME_25MS,

    ADC_DEBOUNCE_TIME_38_62MS,

};

​

enum max14577_muic_status {

    MAX14577_MUIC_STATUS1 = 0,

    MAX14577_MUIC_STATUS2 = 1,

    MAX14577_MUIC_STATUS_END,

};

​

/**

 * struct max14577_muic_irq

 * @irq: the index of irq list of MUIC device.

 * @name: the name of irq.

 * @virq: the virtual irq to use irq domain

 */

struct max14577_muic_irq {

    unsigned int irq;

    const char *name;

    unsigned int virq;

};

​

static struct max14577_muic_irq max14577_muic_irqs[] = {

    { MAX14577_IRQ_INT1_ADC,    "muic-ADC" },

    { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },

    { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },

    { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },

    { MAX14577_IRQ_INT2_CHGDETRUN,  "muic-CHGDETRUN" },

    { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },

    { MAX14577_IRQ_INT2_DBCHG,  "muic-DBCHG" },

    { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },

};

​

static struct max14577_muic_irq max77836_muic_irqs[] = {

    { MAX14577_IRQ_INT1_ADC,    "muic-ADC" },

    { MAX14577_IRQ_INT1_ADCLOW, "muic-ADCLOW" },

    { MAX14577_IRQ_INT1_ADCERR, "muic-ADCError" },

    { MAX77836_IRQ_INT1_ADC1K,  "muic-ADC1K" },

    { MAX14577_IRQ_INT2_CHGTYP, "muic-CHGTYP" },

    { MAX14577_IRQ_INT2_CHGDETRUN,  "muic-CHGDETRUN" },

    { MAX14577_IRQ_INT2_DCDTMR, "muic-DCDTMR" },

    { MAX14577_IRQ_INT2_DBCHG,  "muic-DBCHG" },

    { MAX14577_IRQ_INT2_VBVOLT, "muic-VBVOLT" },

    { MAX77836_IRQ_INT2_VIDRM,  "muic-VIDRM" },

};

​

struct max14577_muic_info {

    struct device *dev;

    struct max14577 *max14577;

    struct extcon_dev *edev;

    int prev_cable_type;

    int prev_chg_type;

    u8 status[MAX14577_MUIC_STATUS_END];

​

    struct max14577_muic_irq *muic_irqs;

    unsigned int muic_irqs_num;

    bool irq_adc;

    bool irq_chg;

    struct work_struct irq_work;

    struct mutex mutex;

​

    /*

     * Use delayed workqueue to detect cable state and then

     * notify cable state to notifiee/platform through uevent.

     * After completing the booting of platform, the extcon provider

     * driver should notify cable state to upper layer.

     */

    struct delayed_work wq_detcable;

​

    /*