/* * extcon-max8997.c - MAX8997 extcon driver to support MAX8997 MUIC * * Copyright (C) 2012 Samsung Electronics * Donggeun Kim * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include #include #include #include #include #include #include #include #include #include #include #define DEV_NAME "max8997-muic" #define DELAY_MS_DEFAULT 20000 /* unit: millisecond */ enum max8997_muic_adc_debounce_time { ADC_DEBOUNCE_TIME_0_5MS = 0, /* 0.5ms */ ADC_DEBOUNCE_TIME_10MS, /* 10ms */ ADC_DEBOUNCE_TIME_25MS, /* 25ms */ ADC_DEBOUNCE_TIME_38_62MS, /* 38.62ms */ }; struct max8997_muic_irq { unsigned int irq; const char *name; unsigned int virq; }; static struct max8997_muic_irq muic_irqs[] = { { MAX8997_MUICIRQ_ADCError, "muic-ADCERROR" }, { MAX8997_MUICIRQ_ADCLow, "muic-ADCLOW" }, { MAX8997_MUICIRQ_ADC, "muic-ADC" }, { MAX8997_MUICIRQ_VBVolt, "muic-VBVOLT" }, { MAX8997_MUICIRQ_DBChg, "muic-DBCHG" }, { MAX8997_MUICIRQ_DCDTmr, "muic-DCDTMR" }, { MAX8997_MUICIRQ_ChgDetRun, "muic-CHGDETRUN" }, { MAX8997_MUICIRQ_ChgTyp, "muic-CHGTYP" }, { MAX8997_MUICIRQ_OVP, "muic-OVP" }, }; /* Define supported cable type */ enum max8997_muic_acc_type { MAX8997_MUIC_ADC_GROUND = 0x0, MAX8997_MUIC_ADC_MHL, /* MHL*/ MAX8997_MUIC_ADC_REMOTE_S1_BUTTON, MAX8997_MUIC_ADC_REMOTE_S2_BUTTON, MAX8997_MUIC_ADC_REMOTE_S3_BUTTON, MAX8997_MUIC_ADC_REMOTE_S4_BUTTON, MAX8997_MUIC_ADC_REMOTE_S5_BUTTON, MAX8997_MUIC_ADC_REMOTE_S6_BUTTON, MAX8997_MUIC_ADC_REMOTE_S7_BUTTON, MAX8997_MUIC_ADC_REMOTE_S8_BUTTON, MAX8997_MUIC_ADC_REMOTE_S9_BUTTON, MAX8997_MUIC_ADC_REMOTE_S10_BUTTON, MAX8997_MUIC_ADC_REMOTE_S11_BUTTON, MAX8997_MUIC_ADC_REMOTE_S12_BUTTON, MAX8997_MUIC_ADC_RESERVED_ACC_1, MAX8997_MUIC_ADC_RESERVED_ACC_2, MAX8997_MUIC_ADC_RESERVED_ACC_3, MAX8997_MUIC_ADC_RESERVED_ACC_4, MAX8997_MUIC_ADC_RESERVED_ACC_5, MAX8997_MUIC_ADC_CEA936_AUDIO, MAX8997_MUIC_ADC_PHONE_POWERED_DEV, MAX8997_MUIC_ADC_TTY_CONVERTER, MAX8997_MUIC_ADC_UART_CABLE, MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF, /* JIG-USB-OFF */ MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON, /* JIG-USB-ON */ MAX8997_MUIC_ADC_AV_CABLE_NOLOAD, /* DESKDOCK */ MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG, MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF, /* JIG-UART */ MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON, /* CARDOCK */ MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE, MAX8997_MUIC_ADC_OPEN, /* OPEN */ }; enum max8997_muic_cable_group { MAX8997_CABLE_GROUP_ADC = 0, MAX8997_CABLE_GROUP_ADC_GND, MAX8997_CABLE_GROUP_CHG, MAX8997_CABLE_GROUP_VBVOLT, }; enum max8997_muic_usb_type { MAX8997_USB_HOST, MAX8997_USB_DEVICE, }; enum max8997_muic_charger_type { MAX8997_CHARGER_TYPE_NONE = 0, MAX8997_CHARGER_TYPE_USB, MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT, MAX8997_CHARGER_TYPE_DEDICATED_CHG, MAX8997_CHARGER_TYPE_500MA, MAX8997_CHARGER_TYPE_1A, MAX8997_CHARGER_TYPE_DEAD_BATTERY = 7, }; struct max8997_muic_info { struct device *dev; struct i2c_client *muic; struct extcon_dev *edev; int prev_cable_type; int prev_chg_type; u8 status[2]; int irq; struct work_struct irq_work; struct mutex mutex; struct max8997_muic_platform_data *muic_pdata; enum max8997_muic_charger_type pre_charger_type; /* * 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; /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register. */ int path_usb; int path_uart; }; enum { EXTCON_CABLE_USB = 0, EXTCON_CABLE_USB_HOST, EXTCON_CABLE_TA, EXTCON_CABLE_FAST_CHARGER, EXTCON_CABLE_SLOW_CHARGER, EXTCON_CABLE_CHARGE_DOWNSTREAM, EXTCON_CABLE_MHL, EXTCON_CABLE_DOCK_DESK, EXTCON_CABLE_DOCK_CARD, EXTCON_CABLE_JIG, _EXTCON_CABLE_NUM, }; static const char *max8997_extcon_cable[] = { [EXTCON_CABLE_USB] = "USB", [EXTCON_CABLE_USB_HOST] = "USB-Host", [EXTCON_CABLE_TA] = "TA", [EXTCON_CABLE_FAST_CHARGER] = "Fast-charger", [EXTCON_CABLE_SLOW_CHARGER] = "Slow-charger", [EXTCON_CABLE_CHARGE_DOWNSTREAM] = "Charge-downstream", [EXTCON_CABLE_MHL] = "MHL", [EXTCON_CABLE_DOCK_DESK] = "Dock-Desk", [EXTCON_CABLE_DOCK_CARD] = "Dock-Card", [EXTCON_CABLE_JIG] = "JIG", NULL, }; /* * max8997_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max8997 MUIC * @time: the debounce time of ADC */ static int max8997_muic_set_debounce_time(struct max8997_muic_info *info, enum max8997_muic_adc_debounce_time time) { int ret; switch (time) { case ADC_DEBOUNCE_TIME_0_5MS: case ADC_DEBOUNCE_TIME_10MS: case ADC_DEBOUNCE_TIME_25MS: case ADC_DEBOUNCE_TIME_38_62MS: ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL3, time << CONTROL3_ADCDBSET_SHIFT, CONTROL3_ADCDBSET_MASK); if (ret) { dev_err(info->dev, "failed to set ADC debounce time\n"); return ret; } break; default: dev_err(info->dev, "invalid ADC debounce time\n"); return -EINVAL; } return 0; }; /* * max8997_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max8997 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max8997 MUIC device share outside H/W line among a varity of cables, * so this function set internal path of H/W line according to the type of * attached cable. */ static int max8997_muic_set_path(struct max8997_muic_info *info, u8 val, bool attached) { int ret = 0; u8 ctrl1, ctrl2 = 0; if (attached) ctrl1 = val; else ctrl1 = CONTROL1_SW_OPEN; ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL1, ctrl1, COMP_SW_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } if (attached) ctrl2 |= CONTROL2_CPEN_MASK; /* LowPwr=0, CPEn=1 */ else ctrl2 |= CONTROL2_LOWPWR_MASK; /* LowPwr=1, CPEn=0 */ ret = max8997_update_reg(info->muic, MAX8997_MUIC_REG_CONTROL2, ctrl2, CONTROL2_LOWPWR_MASK | CONTROL2_CPEN_MASK); if (ret < 0) { dev_err(info->dev, "failed to update MUIC register\n"); return ret; } dev_info(info->dev, "CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", ctrl1, ctrl2, attached ? "attached" : "detached"); return 0; } /* * max8997_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max8997 MUIC * @group: the path according to attached cable * @attached: store cable state and return * * This function check the cable state either attached or detached, * and then divide precise type of cable according to cable group. * - MAX8997_CABLE_GROUP_ADC * - MAX8997_CABLE_GROUP_CHG */ static int max8997_muic_get_cable_type(struct max8997_muic_info *info, enum max8997_muic_cable_group group, bool *attached) { int cable_type = 0; int adc; int chg_type; switch (group) { case MAX8997_CABLE_GROUP_ADC: /* * Read ADC value to check cable type and decide cable state * according to cable type */ adc = info->status[0] & STATUS1_ADC_MASK; adc >>= STATUS1_ADC_SHIFT; /* * Check current cable state/cable type and store cable type * (info->prev_cable_type) for handling cable when cable is * detached. */ if (adc == MAX8997_MUIC_ADC_OPEN) { *attached = false; cable_type = info->prev_cable_type; info->prev_cable_type = MAX8997_MUIC_ADC_OPEN; } else { *attached = true; cable_type = info->prev_cable_type = adc; } break; case MAX8997_CABLE_GROUP_CHG: /* * Read charger type to check cable type and decide cable state * according to type of charger cable. */ chg_type = info->status[1] & STATUS2_CHGTYP_MASK; chg_type >>= STATUS2_CHGTYP_SHIFT; if (chg_type == MAX8997_CHARGER_TYPE_NONE) { *attached = false; cable_type = info->prev_chg_type; info->prev_chg_type = MAX8997_CHARGER_TYPE_NONE; } else { *attached = true; /* * Check current cable state/cable type and store cable * type(info->prev_chg_type) for handling cable when * charger cable is detached. */ cable_type = info->prev_chg_type = chg_type; } break; default: dev_err(info->dev, "Unknown cable group (%d)\n", group); cable_type = -EINVAL; break; } return cable_type; } static int max8997_muic_handle_usb(struct max8997_muic_info *info, enum max8997_muic_usb_type usb_type, bool attached) { int ret = 0; if (usb_type == MAX8997_USB_HOST) { ret = max8997_muic_set_path(info, info->path_usb, attached); if (ret < 0) { dev_err(info->dev, "failed to update muic register\n"); return ret; } } switch (usb_type) { case MAX8997_USB_HOST: extcon_set_cable_state(info->edev, "USB-Host", attached); break; case MAX8997_USB_DEVICE: extcon_set_cable_state(info->edev, "USB", attached); break; default: dev_err(info->dev, "failed to detect %s usb cable\n", attached ? "attached" : "detached"); return -EINVAL; } return 0; } static int max8997_muic_handle_dock(struct max8997_muic_info *info, int cable_type, bool attached) { int ret = 0; ret = max8997_muic_set_path(info, CONTROL1_SW_AUDIO, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } switch (cable_type) { case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: extcon_set_cable_state(info->edev, "Dock-desk", attached); break; case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: extcon_set_cable_state(info->edev, "Dock-card", attached); break; default: dev_err(info->dev, "failed to detect %s dock device\n", attached ? "attached" : "detached"); return -EINVAL; } return 0; } static int max8997_muic_handle_jig_uart(struct max8997_muic_info *info, bool attached) { int ret = 0; /* switch to UART */ ret = max8997_muic_set_path(info, info->path_uart, attached); if (ret) { dev_err(info->dev, "failed to update muic register\n"); return ret; } extcon_set_cable_state(info->edev, "JIG", attached); return 0; } static int max8997_muic_adc_handler(struct max8997_muic_info *info) { int cable_type; bool attached; int ret = 0; /* Check cable state which is either detached or attached */ cable_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, &attached); switch (cable_type) { case MAX8997_MUIC_ADC_GROUND: ret = max8997_muic_handle_usb(info, MAX8997_USB_HOST, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_MHL: extcon_set_cable_state(info->edev, "MHL", attached); break; case MAX8997_MUIC_ADC_FACTORY_MODE_USB_OFF: case MAX8997_MUIC_ADC_FACTORY_MODE_USB_ON: ret = max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_AV_CABLE_NOLOAD: case MAX8997_MUIC_ADC_FACTORY_MODE_UART_ON: ret = max8997_muic_handle_dock(info, cable_type, attached); if (ret < 0) return ret; break; case MAX8997_MUIC_ADC_FACTORY_MODE_UART_OFF: ret = max8997_muic_handle_jig_uart(info, attached); break; case MAX8997_MUIC_ADC_REMOTE_S1_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S2_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S3_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S4_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S5_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S6_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S7_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S8_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S9_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S10_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S11_BUTTON: case MAX8997_MUIC_ADC_REMOTE_S12_BUTTON: case MAX8997_MUIC_ADC_RESERVED_ACC_1: case MAX8997_MUIC_ADC_RESERVED_ACC_2: case MAX8997_MUIC_ADC_RESERVED_ACC_3: case MAX8997_MUIC_ADC_RESERVED_ACC_4: case MAX8997_MUIC_ADC_RESERVED_ACC_5: case MAX8997_MUIC_ADC_CEA936_AUDIO: case MAX8997_MUIC_ADC_PHONE_POWERED_DEV: case MAX8997_MUIC_ADC_TTY_CONVERTER: case MAX8997_MUIC_ADC_UART_CABLE: case MAX8997_MUIC_ADC_CEA936A_TYPE1_CHG: case MAX8997_MUIC_ADC_CEA936A_TYPE2_CHG: case MAX8997_MUIC_ADC_AUDIO_MODE_REMOTE: /* * This cable isn't used in general case if it is specially * needed to detect additional cable, should implement * proper operation when this cable is attached/detached. */ dev_info(info->dev, "cable is %s but it isn't used (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EAGAIN; default: dev_err(info->dev, "failed to detect %s unknown cable (type:0x%x)\n", attached ? "attached" : "detached", cable_type); return -EINVAL; } return 0; } static int max8997_muic_chg_handler(struct max8997_muic_info *info) { int chg_type; bool attached; int adc; chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, &attached); switch (chg_type) { case MAX8997_CHARGER_TYPE_NONE: break; case MAX8997_CHARGER_TYPE_USB: adc = info->status[0] & STATUS1_ADC_MASK; adc >>= STATUS1_ADC_SHIFT; if ((adc & STATUS1_ADC_MASK) == MAX8997_MUIC_ADC_OPEN) { max8997_muic_handle_usb(info, MAX8997_USB_DEVICE, attached); } break; case MAX8997_CHARGER_TYPE_DOWNSTREAM_PORT: extcon_set_cable_state(info->edev, "Charge-downstream", attached); break; case MAX8997_CHARGER_TYPE_DEDICATED_CHG: extcon_set_cable_state(info->edev, "TA", attached); break; case MAX8997_CHARGER_TYPE_500MA: extcon_set_cable_state(info->edev, "Slow-charger", attached); break; case MAX8997_CHARGER_TYPE_1A: extcon_set_cable_state(info->edev, "Fast-charger", attached); break; default: dev_err(info->dev, "failed to detect %s unknown chg cable (type:0x%x)\n", attached ? "attached" : "detached", chg_type); return -EINVAL; } return 0; } static void max8997_muic_irq_work(struct work_struct *work) { struct max8997_muic_info *info = container_of(work, struct max8997_muic_info, irq_work); int irq_type = 0; int i, ret; if (!info->edev) return; mutex_lock(&info->mutex); for (i = 0 ; i < ARRAY_SIZE(muic_irqs) ; i++) if (info->irq == muic_irqs[i].virq) irq_type = muic_irqs[i].irq; ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, 2, info->status); if (ret) { dev_err(info->dev, "failed to read muic register\n"); mutex_unlock(&info->mutex); return; } switch (irq_type) { case MAX8997_MUICIRQ_ADCError: case MAX8997_MUICIRQ_ADCLow: case MAX8997_MUICIRQ_ADC: /* Handle all of cable except for charger cable */ ret = max8997_muic_adc_handler(info); break; case MAX8997_MUICIRQ_VBVolt: case MAX8997_MUICIRQ_DBChg: case MAX8997_MUICIRQ_DCDTmr: case MAX8997_MUICIRQ_ChgDetRun: case MAX8997_MUICIRQ_ChgTyp: /* Handle charger cable */ ret = max8997_muic_chg_handler(info); break; case MAX8997_MUICIRQ_OVP: break; default: dev_info(info->dev, "misc interrupt: irq %d occurred\n", irq_type); mutex_unlock(&info->mutex); return; } if (ret < 0) dev_err(info->dev, "failed to handle MUIC interrupt\n"); mutex_unlock(&info->mutex); return; } static irqreturn_t max8997_muic_irq_handler(int irq, void *data) { struct max8997_muic_info *info = data; dev_dbg(info->dev, "irq:%d\n", irq); info->irq = irq; schedule_work(&info->irq_work); return IRQ_HANDLED; } static int max8997_muic_detect_dev(struct max8997_muic_info *info) { int ret = 0; int adc; int chg_type; bool attached; mutex_lock(&info->mutex); /* Read STATUSx register to detect accessory */ ret = max8997_bulk_read(info->muic, MAX8997_MUIC_REG_STATUS1, 2, info->status); if (ret) { dev_err(info->dev, "failed to read MUIC register\n"); mutex_unlock(&info->mutex); return ret; } adc = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_ADC, &attached); if (attached && adc != MAX8997_MUIC_ADC_OPEN) { ret = max8997_muic_adc_handler(info); if (ret < 0) { dev_err(info->dev, "Cannot detect ADC cable\n"); mutex_unlock(&info->mutex); return ret; } } chg_type = max8997_muic_get_cable_type(info, MAX8997_CABLE_GROUP_CHG, &attached); if (attached && chg_type != MAX8997_CHARGER_TYPE_NONE) { ret = max8997_muic_chg_handler(info); if (ret < 0) { dev_err(info->dev, "Cannot detect charger cable\n"); mutex_unlock(&info->mutex); return ret; } } mutex_unlock(&info->mutex); return 0; } static void max8997_muic_detect_cable_wq(struct work_struct *work) { struct max8997_muic_info *info = container_of(to_delayed_work(work), struct max8997_muic_info, wq_detcable); int ret; ret = max8997_muic_detect_dev(info); if (ret < 0) dev_err(info->dev, "failed to detect cable type\n"); } static int max8997_muic_probe(struct platform_device *pdev) { struct max8997_dev *max8997 = dev_get_drvdata(pdev->dev.parent); struct max8997_platform_data *pdata = dev_get_platdata(max8997->dev); struct max8997_muic_info *info; int delay_jiffies; int ret, i; info = devm_kzalloc(&pdev->dev, sizeof(struct max8997_muic_info), GFP_KERNEL); if (!info) { dev_err(&pdev->dev, "failed to allocate memory\n"); return -ENOMEM; } info->dev = &pdev->dev; info->muic = max8997->muic; platform_set_drvdata(pdev, info); mutex_init(&info->mutex); INIT_WORK(&info->irq_work, max8997_muic_irq_work); for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) { struct max8997_muic_irq *muic_irq = &muic_irqs[i]; unsigned int virq = 0; virq = irq_create_mapping(max8997->irq_domain, muic_irq->irq); if (!virq) { ret = -EINVAL; goto err_irq; } muic_irq->virq = virq; ret = request_threaded_irq(virq, NULL, max8997_muic_irq_handler, IRQF_NO_SUSPEND, muic_irq->name, info); if (ret) { dev_err(&pdev->dev, "failed: irq request (IRQ: %d," " error :%d)\n", muic_irq->irq, ret); goto err_irq; } } /* External connector */ info->edev = devm_kzalloc(&pdev->dev, sizeof(struct extcon_dev), GFP_KERNEL); if (!info->edev) { dev_err(&pdev->dev, "failed to allocate memory for extcon\n"); ret = -ENOMEM; goto err_irq; } info->edev->name = DEV_NAME; info->edev->supported_cable = max8997_extcon_cable; ret = extcon_dev_register(info->edev, NULL); if (ret) { dev_err(&pdev->dev, "failed to register extcon device\n"); goto err_irq; } if (pdata->muic_pdata) { struct max8997_muic_platform_data *muic_pdata = pdata->muic_pdata; /* Initialize registers according to platform data */ for (i = 0; i < muic_pdata->num_init_data; i++) { max8997_write_reg(info->muic, muic_pdata->init_data[i].addr, muic_pdata->init_data[i].data); } /* * Default usb/uart path whether UART/USB or AUX_UART/AUX_USB * h/w path of COMP2/COMN1 on CONTROL1 register. */ if (muic_pdata->path_uart) info->path_uart = muic_pdata->path_uart; else info->path_uart = CONTROL1_SW_UART; if (muic_pdata->path_usb) info->path_usb = muic_pdata->path_usb; else info->path_usb = CONTROL1_SW_USB; /* * Default delay time for detecting cable state * after certain time. */ if (muic_pdata->detcable_delay_ms) delay_jiffies = msecs_to_jiffies(muic_pdata->detcable_delay_ms); else delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); } else { info->path_uart = CONTROL1_SW_UART; info->path_usb = CONTROL1_SW_USB; delay_jiffies = msecs_to_jiffies(DELAY_MS_DEFAULT); } /* Set initial path for UART */ max8997_muic_set_path(info, info->path_uart, true); /* Set ADC debounce time */ max8997_muic_set_debounce_time(info, ADC_DEBOUNCE_TIME_25MS); /* * Detect accessory after completing the initialization of platform * * - 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. */ INIT_DELAYED_WORK(&info->wq_detcable, max8997_muic_detect_cable_wq); schedule_delayed_work(&info->wq_detcable, delay_jiffies); return 0; err_irq: while (--i >= 0) free_irq(muic_irqs[i].virq, info); return ret; } static int max8997_muic_remove(struct platform_device *pdev) { struct max8997_muic_info *info = platform_get_drvdata(pdev); int i; for (i = 0; i < ARRAY_SIZE(muic_irqs); i++) free_irq(muic_irqs[i].virq, info); cancel_work_sync(&info->irq_work); extcon_dev_unregister(info->edev); return 0; } static struct platform_driver max8997_muic_driver = { .driver = { .name = DEV_NAME, .owner = THIS_MODULE, }, .probe = max8997_muic_probe, .remove = max8997_muic_remove, }; module_platform_driver(max8997_muic_driver); MODULE_DESCRIPTION("Maxim MAX8997 Extcon driver"); MODULE_AUTHOR("Donggeun Kim "); MODULE_LICENSE("GPL");