linux-imx

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

//

// extcon-max77843.c - Maxim MAX77843 extcon driver to support

//          MUIC(Micro USB Interface Controller)

//

// Copyright (C) 2015 Samsung Electronics

// Author: Jaewon Kim <jaewon02.kim@samsung.com>

​

#include <linux/extcon-provider.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/kernel.h>

#include <linux/mfd/max77693-common.h>

#include <linux/mfd/max77843-private.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/workqueue.h>

​

#define DELAY_MS_DEFAULT        15000   /* unit: millisecond */

​

enum max77843_muic_status {

    MAX77843_MUIC_STATUS1 = 0,

    MAX77843_MUIC_STATUS2,

    MAX77843_MUIC_STATUS3,

​

    MAX77843_MUIC_STATUS_NUM,

};

​

struct max77843_muic_info {

    struct device *dev;

    struct max77693_dev *max77843;

    struct extcon_dev *edev;

​

    struct mutex mutex;

    struct work_struct irq_work;

    struct delayed_work wq_detcable;

​

    u8 status[MAX77843_MUIC_STATUS_NUM];

    int prev_cable_type;

    int prev_chg_type;

    int prev_gnd_type;

​

    bool irq_adc;

    bool irq_chg;

};

​

enum max77843_muic_cable_group {

    MAX77843_CABLE_GROUP_ADC = 0,

    MAX77843_CABLE_GROUP_ADC_GND,

    MAX77843_CABLE_GROUP_CHG,

};

​

enum max77843_muic_adc_debounce_time {

    MAX77843_DEBOUNCE_TIME_5MS = 0,

    MAX77843_DEBOUNCE_TIME_10MS,

    MAX77843_DEBOUNCE_TIME_25MS,

    MAX77843_DEBOUNCE_TIME_38_62MS,

};

​

/* Define accessory cable type */

enum max77843_muic_accessory_type {

    MAX77843_MUIC_ADC_GROUND = 0,

    MAX77843_MUIC_ADC_SEND_END_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S1_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S2_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S3_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S4_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S5_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S6_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S7_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S8_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S9_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S10_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S11_BUTTON,

    MAX77843_MUIC_ADC_REMOTE_S12_BUTTON,

    MAX77843_MUIC_ADC_RESERVED_ACC_1,

    MAX77843_MUIC_ADC_RESERVED_ACC_2,

    MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */

    MAX77843_MUIC_ADC_RESERVED_ACC_4,

    MAX77843_MUIC_ADC_RESERVED_ACC_5,

    MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2,

    MAX77843_MUIC_ADC_PHONE_POWERED_DEV,

    MAX77843_MUIC_ADC_TTY_CONVERTER,

    MAX77843_MUIC_ADC_UART_CABLE,

    MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG,

    MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF,

    MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON,

    MAX77843_MUIC_ADC_AV_CABLE_NOLOAD,

    MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG,

    MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF,

    MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON,

    MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1,