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967 lines
26 KiB
967 lines
26 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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// |
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// extcon-max77843.c - Maxim MAX77843 extcon driver to support |
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// MUIC(Micro USB Interface Controller) |
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// |
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// Copyright (C) 2015 Samsung Electronics |
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// Author: Jaewon Kim <[email protected]> |
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#include <linux/extcon-provider.h> |
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#include <linux/i2c.h> |
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#include <linux/interrupt.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/max77693-common.h> |
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#include <linux/mfd/max77843-private.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/workqueue.h> |
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#define DELAY_MS_DEFAULT 15000 /* unit: millisecond */ |
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enum max77843_muic_status { |
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MAX77843_MUIC_STATUS1 = 0, |
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MAX77843_MUIC_STATUS2, |
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MAX77843_MUIC_STATUS3, |
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MAX77843_MUIC_STATUS_NUM, |
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}; |
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struct max77843_muic_info { |
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struct device *dev; |
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struct max77693_dev *max77843; |
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struct extcon_dev *edev; |
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struct mutex mutex; |
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struct work_struct irq_work; |
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struct delayed_work wq_detcable; |
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u8 status[MAX77843_MUIC_STATUS_NUM]; |
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int prev_cable_type; |
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int prev_chg_type; |
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int prev_gnd_type; |
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bool irq_adc; |
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bool irq_chg; |
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}; |
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enum max77843_muic_cable_group { |
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MAX77843_CABLE_GROUP_ADC = 0, |
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MAX77843_CABLE_GROUP_ADC_GND, |
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MAX77843_CABLE_GROUP_CHG, |
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}; |
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enum max77843_muic_adc_debounce_time { |
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MAX77843_DEBOUNCE_TIME_5MS = 0, |
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MAX77843_DEBOUNCE_TIME_10MS, |
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MAX77843_DEBOUNCE_TIME_25MS, |
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MAX77843_DEBOUNCE_TIME_38_62MS, |
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}; |
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/* Define accessory cable type */ |
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enum max77843_muic_accessory_type { |
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MAX77843_MUIC_ADC_GROUND = 0, |
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MAX77843_MUIC_ADC_SEND_END_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S1_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S2_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S3_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S4_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S5_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S6_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S7_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S8_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S9_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S10_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S11_BUTTON, |
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MAX77843_MUIC_ADC_REMOTE_S12_BUTTON, |
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MAX77843_MUIC_ADC_RESERVED_ACC_1, |
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MAX77843_MUIC_ADC_RESERVED_ACC_2, |
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MAX77843_MUIC_ADC_RESERVED_ACC_3, /* SmartDock */ |
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MAX77843_MUIC_ADC_RESERVED_ACC_4, |
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MAX77843_MUIC_ADC_RESERVED_ACC_5, |
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MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2, |
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MAX77843_MUIC_ADC_PHONE_POWERED_DEV, |
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MAX77843_MUIC_ADC_TTY_CONVERTER, |
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MAX77843_MUIC_ADC_UART_CABLE, |
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MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG, |
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MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF, |
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MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON, |
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MAX77843_MUIC_ADC_AV_CABLE_NOLOAD, |
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MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG, |
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MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF, |
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MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON, |
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MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1, |
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MAX77843_MUIC_ADC_OPEN, |
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/* |
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* The below accessories should check |
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* not only ADC value but also ADC1K and VBVolt value. |
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*/ |
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/* Offset|ADC1K|VBVolt| */ |
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MAX77843_MUIC_GND_USB_HOST = 0x100, /* 0x1| 0| 0| */ |
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MAX77843_MUIC_GND_USB_HOST_VB = 0x101, /* 0x1| 0| 1| */ |
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MAX77843_MUIC_GND_MHL = 0x102, /* 0x1| 1| 0| */ |
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MAX77843_MUIC_GND_MHL_VB = 0x103, /* 0x1| 1| 1| */ |
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}; |
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/* Define charger cable type */ |
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enum max77843_muic_charger_type { |
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MAX77843_MUIC_CHG_NONE = 0, |
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MAX77843_MUIC_CHG_USB, |
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MAX77843_MUIC_CHG_DOWNSTREAM, |
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MAX77843_MUIC_CHG_DEDICATED, |
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MAX77843_MUIC_CHG_SPECIAL_500MA, |
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MAX77843_MUIC_CHG_SPECIAL_1A, |
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MAX77843_MUIC_CHG_SPECIAL_BIAS, |
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MAX77843_MUIC_CHG_RESERVED, |
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MAX77843_MUIC_CHG_GND, |
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MAX77843_MUIC_CHG_DOCK, |
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}; |
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static const unsigned int max77843_extcon_cable[] = { |
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EXTCON_USB, |
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EXTCON_USB_HOST, |
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EXTCON_CHG_USB_SDP, |
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EXTCON_CHG_USB_DCP, |
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EXTCON_CHG_USB_CDP, |
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EXTCON_CHG_USB_FAST, |
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EXTCON_CHG_USB_SLOW, |
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EXTCON_DISP_MHL, |
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EXTCON_DOCK, |
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EXTCON_JIG, |
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EXTCON_NONE, |
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}; |
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struct max77843_muic_irq { |
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unsigned int irq; |
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const char *name; |
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unsigned int virq; |
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}; |
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static struct max77843_muic_irq max77843_muic_irqs[] = { |
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{ MAX77843_MUIC_IRQ_INT1_ADC, "MUIC-ADC" }, |
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{ MAX77843_MUIC_IRQ_INT1_ADCERROR, "MUIC-ADC_ERROR" }, |
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{ MAX77843_MUIC_IRQ_INT1_ADC1K, "MUIC-ADC1K" }, |
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{ MAX77843_MUIC_IRQ_INT2_CHGTYP, "MUIC-CHGTYP" }, |
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{ MAX77843_MUIC_IRQ_INT2_CHGDETRUN, "MUIC-CHGDETRUN" }, |
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{ MAX77843_MUIC_IRQ_INT2_DCDTMR, "MUIC-DCDTMR" }, |
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{ MAX77843_MUIC_IRQ_INT2_DXOVP, "MUIC-DXOVP" }, |
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{ MAX77843_MUIC_IRQ_INT2_VBVOLT, "MUIC-VBVOLT" }, |
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{ MAX77843_MUIC_IRQ_INT3_VBADC, "MUIC-VBADC" }, |
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{ MAX77843_MUIC_IRQ_INT3_VDNMON, "MUIC-VDNMON" }, |
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{ MAX77843_MUIC_IRQ_INT3_DNRES, "MUIC-DNRES" }, |
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{ MAX77843_MUIC_IRQ_INT3_MPNACK, "MUIC-MPNACK"}, |
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{ MAX77843_MUIC_IRQ_INT3_MRXBUFOW, "MUIC-MRXBUFOW"}, |
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{ MAX77843_MUIC_IRQ_INT3_MRXTRF, "MUIC-MRXTRF"}, |
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{ MAX77843_MUIC_IRQ_INT3_MRXPERR, "MUIC-MRXPERR"}, |
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{ MAX77843_MUIC_IRQ_INT3_MRXRDY, "MUIC-MRXRDY"}, |
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}; |
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static const struct regmap_config max77843_muic_regmap_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.max_register = MAX77843_MUIC_REG_END, |
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}; |
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static const struct regmap_irq max77843_muic_irq[] = { |
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/* INT1 interrupt */ |
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC, }, |
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADCERROR, }, |
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{ .reg_offset = 0, .mask = MAX77843_MUIC_ADC1K, }, |
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/* INT2 interrupt */ |
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{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGTYP, }, |
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{ .reg_offset = 1, .mask = MAX77843_MUIC_CHGDETRUN, }, |
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{ .reg_offset = 1, .mask = MAX77843_MUIC_DCDTMR, }, |
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{ .reg_offset = 1, .mask = MAX77843_MUIC_DXOVP, }, |
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{ .reg_offset = 1, .mask = MAX77843_MUIC_VBVOLT, }, |
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/* INT3 interrupt */ |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_VBADC, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_VDNMON, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_DNRES, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MPNACK, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXBUFOW, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXTRF, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXPERR, }, |
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{ .reg_offset = 2, .mask = MAX77843_MUIC_MRXRDY, }, |
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}; |
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static const struct regmap_irq_chip max77843_muic_irq_chip = { |
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.name = "max77843-muic", |
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.status_base = MAX77843_MUIC_REG_INT1, |
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.mask_base = MAX77843_MUIC_REG_INTMASK1, |
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.mask_invert = true, |
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.num_regs = 3, |
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.irqs = max77843_muic_irq, |
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.num_irqs = ARRAY_SIZE(max77843_muic_irq), |
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}; |
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static int max77843_muic_set_path(struct max77843_muic_info *info, |
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u8 val, bool attached, bool nobccomp) |
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{ |
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struct max77693_dev *max77843 = info->max77843; |
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int ret = 0; |
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unsigned int ctrl1, ctrl2; |
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if (attached) |
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ctrl1 = val; |
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else |
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ctrl1 = MAX77843_MUIC_CONTROL1_SW_OPEN; |
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if (nobccomp) { |
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/* Disable BC1.2 protocol and force manual switch control */ |
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ctrl1 |= MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK; |
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} |
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ret = regmap_update_bits(max77843->regmap_muic, |
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MAX77843_MUIC_REG_CONTROL1, |
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MAX77843_MUIC_CONTROL1_COM_SW | |
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MAX77843_MUIC_CONTROL1_NOBCCOMP_MASK, |
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ctrl1); |
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if (ret < 0) { |
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dev_err(info->dev, "Cannot switch MUIC port\n"); |
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return ret; |
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} |
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if (attached) |
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ctrl2 = MAX77843_MUIC_CONTROL2_CPEN_MASK; |
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else |
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ctrl2 = MAX77843_MUIC_CONTROL2_LOWPWR_MASK; |
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ret = regmap_update_bits(max77843->regmap_muic, |
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MAX77843_MUIC_REG_CONTROL2, |
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MAX77843_MUIC_CONTROL2_LOWPWR_MASK | |
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MAX77843_MUIC_CONTROL2_CPEN_MASK, ctrl2); |
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if (ret < 0) { |
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dev_err(info->dev, "Cannot update lowpower mode\n"); |
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return ret; |
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} |
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dev_dbg(info->dev, |
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"CONTROL1 : 0x%02x, CONTROL2 : 0x%02x, state : %s\n", |
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ctrl1, ctrl2, attached ? "attached" : "detached"); |
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return 0; |
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} |
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static void max77843_charger_set_otg_vbus(struct max77843_muic_info *info, |
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bool on) |
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{ |
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struct max77693_dev *max77843 = info->max77843; |
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unsigned int cnfg00; |
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if (on) |
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cnfg00 = MAX77843_CHG_OTG_MASK | MAX77843_CHG_BOOST_MASK; |
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else |
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cnfg00 = MAX77843_CHG_ENABLE | MAX77843_CHG_BUCK_MASK; |
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regmap_update_bits(max77843->regmap_chg, MAX77843_CHG_REG_CHG_CNFG_00, |
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MAX77843_CHG_MODE_MASK, cnfg00); |
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} |
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static int max77843_muic_get_cable_type(struct max77843_muic_info *info, |
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enum max77843_muic_cable_group group, bool *attached) |
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{ |
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int adc, chg_type, cable_type, gnd_type; |
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adc = info->status[MAX77843_MUIC_STATUS1] & |
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MAX77843_MUIC_STATUS1_ADC_MASK; |
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adc >>= MAX77843_MUIC_STATUS1_ADC_SHIFT; |
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switch (group) { |
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case MAX77843_CABLE_GROUP_ADC: |
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if (adc == MAX77843_MUIC_ADC_OPEN) { |
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*attached = false; |
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cable_type = info->prev_cable_type; |
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info->prev_cable_type = MAX77843_MUIC_ADC_OPEN; |
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} else { |
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*attached = true; |
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cable_type = info->prev_cable_type = adc; |
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} |
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break; |
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case MAX77843_CABLE_GROUP_CHG: |
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chg_type = info->status[MAX77843_MUIC_STATUS2] & |
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MAX77843_MUIC_STATUS2_CHGTYP_MASK; |
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/* Check GROUND accessory with charger cable */ |
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if (adc == MAX77843_MUIC_ADC_GROUND) { |
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if (chg_type == MAX77843_MUIC_CHG_NONE) { |
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/* |
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* The following state when charger cable is |
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* disconnected but the GROUND accessory still |
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* connected. |
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*/ |
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*attached = false; |
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cable_type = info->prev_chg_type; |
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info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
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} else { |
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/* |
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* The following state when charger cable is |
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* connected on the GROUND accessory. |
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*/ |
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*attached = true; |
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cable_type = MAX77843_MUIC_CHG_GND; |
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info->prev_chg_type = MAX77843_MUIC_CHG_GND; |
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} |
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break; |
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} |
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if (adc == MAX77843_MUIC_ADC_RESERVED_ACC_3) { /* SmartDock */ |
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if (chg_type == MAX77843_MUIC_CHG_NONE) { |
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*attached = false; |
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cable_type = info->prev_chg_type; |
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info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
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} else { |
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*attached = true; |
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cable_type = MAX77843_MUIC_CHG_DOCK; |
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info->prev_chg_type = MAX77843_MUIC_CHG_DOCK; |
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} |
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break; |
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} |
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if (chg_type == MAX77843_MUIC_CHG_NONE) { |
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*attached = false; |
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cable_type = info->prev_chg_type; |
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info->prev_chg_type = MAX77843_MUIC_CHG_NONE; |
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} else { |
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*attached = true; |
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cable_type = info->prev_chg_type = chg_type; |
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} |
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break; |
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case MAX77843_CABLE_GROUP_ADC_GND: |
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if (adc == MAX77843_MUIC_ADC_OPEN) { |
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*attached = false; |
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cable_type = info->prev_gnd_type; |
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info->prev_gnd_type = MAX77843_MUIC_ADC_OPEN; |
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} else { |
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*attached = true; |
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/* |
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* Offset|ADC1K|VBVolt| |
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* 0x1| 0| 0| USB-HOST |
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* 0x1| 0| 1| USB-HOST with VB |
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* 0x1| 1| 0| MHL |
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* 0x1| 1| 1| MHL with VB |
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*/ |
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/* Get ADC1K register bit */ |
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gnd_type = (info->status[MAX77843_MUIC_STATUS1] & |
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MAX77843_MUIC_STATUS1_ADC1K_MASK); |
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/* Get VBVolt register bit */ |
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gnd_type |= (info->status[MAX77843_MUIC_STATUS2] & |
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MAX77843_MUIC_STATUS2_VBVOLT_MASK); |
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gnd_type >>= MAX77843_MUIC_STATUS2_VBVOLT_SHIFT; |
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/* Offset of GND cable */ |
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gnd_type |= MAX77843_MUIC_GND_USB_HOST; |
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cable_type = info->prev_gnd_type = gnd_type; |
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} |
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break; |
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default: |
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dev_err(info->dev, "Unknown cable group (%d)\n", group); |
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cable_type = -EINVAL; |
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break; |
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} |
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return cable_type; |
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} |
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static int max77843_muic_adc_gnd_handler(struct max77843_muic_info *info) |
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{ |
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int ret, gnd_cable_type; |
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bool attached; |
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gnd_cable_type = max77843_muic_get_cable_type(info, |
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MAX77843_CABLE_GROUP_ADC_GND, &attached); |
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dev_dbg(info->dev, "external connector is %s (gnd:0x%02x)\n", |
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attached ? "attached" : "detached", gnd_cable_type); |
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switch (gnd_cable_type) { |
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case MAX77843_MUIC_GND_USB_HOST: |
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case MAX77843_MUIC_GND_USB_HOST_VB: |
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ret = max77843_muic_set_path(info, |
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MAX77843_MUIC_CONTROL1_SW_USB, |
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attached, false); |
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if (ret < 0) |
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return ret; |
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extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
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max77843_charger_set_otg_vbus(info, attached); |
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break; |
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case MAX77843_MUIC_GND_MHL_VB: |
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case MAX77843_MUIC_GND_MHL: |
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ret = max77843_muic_set_path(info, |
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MAX77843_MUIC_CONTROL1_SW_OPEN, |
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attached, false); |
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if (ret < 0) |
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return ret; |
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extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
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break; |
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default: |
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dev_err(info->dev, "failed to detect %s accessory(gnd:0x%x)\n", |
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attached ? "attached" : "detached", gnd_cable_type); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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static int max77843_muic_jig_handler(struct max77843_muic_info *info, |
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int cable_type, bool attached) |
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{ |
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int ret; |
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u8 path = MAX77843_MUIC_CONTROL1_SW_OPEN; |
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|
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dev_dbg(info->dev, "external connector is %s (adc:0x%02x)\n", |
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attached ? "attached" : "detached", cable_type); |
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switch (cable_type) { |
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case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
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case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
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path = MAX77843_MUIC_CONTROL1_SW_USB; |
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break; |
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case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
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path = MAX77843_MUIC_CONTROL1_SW_UART; |
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break; |
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default: |
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return -EINVAL; |
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} |
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ret = max77843_muic_set_path(info, path, attached, false); |
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if (ret < 0) |
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return ret; |
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extcon_set_state_sync(info->edev, EXTCON_JIG, attached); |
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return 0; |
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} |
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static int max77843_muic_dock_handler(struct max77843_muic_info *info, |
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bool attached) |
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{ |
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int ret; |
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dev_dbg(info->dev, "external connector is %s (adc: 0x10)\n", |
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attached ? "attached" : "detached"); |
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ret = max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_USB, |
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attached, attached); |
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if (ret < 0) |
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return ret; |
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extcon_set_state_sync(info->edev, EXTCON_DISP_MHL, attached); |
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extcon_set_state_sync(info->edev, EXTCON_USB_HOST, attached); |
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extcon_set_state_sync(info->edev, EXTCON_DOCK, attached); |
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|
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return 0; |
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} |
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|
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static int max77843_muic_adc_handler(struct max77843_muic_info *info) |
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{ |
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int ret, cable_type; |
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bool attached; |
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|
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cable_type = max77843_muic_get_cable_type(info, |
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MAX77843_CABLE_GROUP_ADC, &attached); |
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|
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dev_dbg(info->dev, |
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"external connector is %s (adc:0x%02x, prev_adc:0x%x)\n", |
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attached ? "attached" : "detached", cable_type, |
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info->prev_cable_type); |
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|
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switch (cable_type) { |
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case MAX77843_MUIC_ADC_RESERVED_ACC_3: /* SmartDock */ |
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ret = max77843_muic_dock_handler(info, attached); |
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if (ret < 0) |
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return ret; |
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break; |
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case MAX77843_MUIC_ADC_GROUND: |
|
ret = max77843_muic_adc_gnd_handler(info); |
|
if (ret < 0) |
|
return ret; |
|
break; |
|
case MAX77843_MUIC_ADC_FACTORY_MODE_USB_OFF: |
|
case MAX77843_MUIC_ADC_FACTORY_MODE_USB_ON: |
|
case MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF: |
|
ret = max77843_muic_jig_handler(info, cable_type, attached); |
|
if (ret < 0) |
|
return ret; |
|
break; |
|
case MAX77843_MUIC_ADC_SEND_END_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S1_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S2_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S3_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S4_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S5_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S6_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S7_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S8_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S9_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S10_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S11_BUTTON: |
|
case MAX77843_MUIC_ADC_REMOTE_S12_BUTTON: |
|
case MAX77843_MUIC_ADC_RESERVED_ACC_1: |
|
case MAX77843_MUIC_ADC_RESERVED_ACC_2: |
|
case MAX77843_MUIC_ADC_RESERVED_ACC_4: |
|
case MAX77843_MUIC_ADC_RESERVED_ACC_5: |
|
case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE2: |
|
case MAX77843_MUIC_ADC_PHONE_POWERED_DEV: |
|
case MAX77843_MUIC_ADC_TTY_CONVERTER: |
|
case MAX77843_MUIC_ADC_UART_CABLE: |
|
case MAX77843_MUIC_ADC_CEA936A_TYPE1_CHG: |
|
case MAX77843_MUIC_ADC_AV_CABLE_NOLOAD: |
|
case MAX77843_MUIC_ADC_CEA936A_TYPE2_CHG: |
|
case MAX77843_MUIC_ADC_FACTORY_MODE_UART_ON: |
|
case MAX77843_MUIC_ADC_AUDIO_DEVICE_TYPE1: |
|
case MAX77843_MUIC_ADC_OPEN: |
|
dev_err(info->dev, |
|
"accessory is %s but it isn't used (adc:0x%x)\n", |
|
attached ? "attached" : "detached", cable_type); |
|
return -EAGAIN; |
|
default: |
|
dev_err(info->dev, |
|
"failed to detect %s accessory (adc:0x%x)\n", |
|
attached ? "attached" : "detached", cable_type); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int max77843_muic_chg_handler(struct max77843_muic_info *info) |
|
{ |
|
int ret, chg_type, gnd_type; |
|
bool attached; |
|
|
|
chg_type = max77843_muic_get_cable_type(info, |
|
MAX77843_CABLE_GROUP_CHG, &attached); |
|
|
|
dev_dbg(info->dev, |
|
"external connector is %s(chg_type:0x%x, prev_chg_type:0x%x)\n", |
|
attached ? "attached" : "detached", |
|
chg_type, info->prev_chg_type); |
|
|
|
switch (chg_type) { |
|
case MAX77843_MUIC_CHG_USB: |
|
ret = max77843_muic_set_path(info, |
|
MAX77843_MUIC_CONTROL1_SW_USB, |
|
attached, false); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_USB, attached); |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SDP, |
|
attached); |
|
break; |
|
case MAX77843_MUIC_CHG_DOWNSTREAM: |
|
ret = max77843_muic_set_path(info, |
|
MAX77843_MUIC_CONTROL1_SW_OPEN, |
|
attached, false); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_CDP, |
|
attached); |
|
break; |
|
case MAX77843_MUIC_CHG_DEDICATED: |
|
ret = max77843_muic_set_path(info, |
|
MAX77843_MUIC_CONTROL1_SW_OPEN, |
|
attached, false); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
|
attached); |
|
break; |
|
case MAX77843_MUIC_CHG_SPECIAL_500MA: |
|
ret = max77843_muic_set_path(info, |
|
MAX77843_MUIC_CONTROL1_SW_OPEN, |
|
attached, false); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_SLOW, |
|
attached); |
|
break; |
|
case MAX77843_MUIC_CHG_SPECIAL_1A: |
|
ret = max77843_muic_set_path(info, |
|
MAX77843_MUIC_CONTROL1_SW_OPEN, |
|
attached, false); |
|
if (ret < 0) |
|
return ret; |
|
|
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_FAST, |
|
attached); |
|
break; |
|
case MAX77843_MUIC_CHG_GND: |
|
gnd_type = max77843_muic_get_cable_type(info, |
|
MAX77843_CABLE_GROUP_ADC_GND, &attached); |
|
|
|
/* Charger cable on MHL accessory is attach or detach */ |
|
if (gnd_type == MAX77843_MUIC_GND_MHL_VB) |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
|
true); |
|
else if (gnd_type == MAX77843_MUIC_GND_MHL) |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, |
|
false); |
|
break; |
|
case MAX77843_MUIC_CHG_DOCK: |
|
extcon_set_state_sync(info->edev, EXTCON_CHG_USB_DCP, attached); |
|
break; |
|
case MAX77843_MUIC_CHG_NONE: |
|
break; |
|
default: |
|
dev_err(info->dev, |
|
"failed to detect %s accessory (chg_type:0x%x)\n", |
|
attached ? "attached" : "detached", chg_type); |
|
|
|
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_OPEN, |
|
attached, false); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void max77843_muic_irq_work(struct work_struct *work) |
|
{ |
|
struct max77843_muic_info *info = container_of(work, |
|
struct max77843_muic_info, irq_work); |
|
struct max77693_dev *max77843 = info->max77843; |
|
int ret = 0; |
|
|
|
mutex_lock(&info->mutex); |
|
|
|
ret = regmap_bulk_read(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_STATUS1, info->status, |
|
MAX77843_MUIC_STATUS_NUM); |
|
if (ret) { |
|
dev_err(info->dev, "Cannot read STATUS registers\n"); |
|
mutex_unlock(&info->mutex); |
|
return; |
|
} |
|
|
|
if (info->irq_adc) { |
|
ret = max77843_muic_adc_handler(info); |
|
if (ret) |
|
dev_err(info->dev, "Unknown cable type\n"); |
|
info->irq_adc = false; |
|
} |
|
|
|
if (info->irq_chg) { |
|
ret = max77843_muic_chg_handler(info); |
|
if (ret) |
|
dev_err(info->dev, "Unknown charger type\n"); |
|
info->irq_chg = false; |
|
} |
|
|
|
mutex_unlock(&info->mutex); |
|
} |
|
|
|
static irqreturn_t max77843_muic_irq_handler(int irq, void *data) |
|
{ |
|
struct max77843_muic_info *info = data; |
|
int i, irq_type = -1; |
|
|
|
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) |
|
if (irq == max77843_muic_irqs[i].virq) |
|
irq_type = max77843_muic_irqs[i].irq; |
|
|
|
switch (irq_type) { |
|
case MAX77843_MUIC_IRQ_INT1_ADC: |
|
case MAX77843_MUIC_IRQ_INT1_ADCERROR: |
|
case MAX77843_MUIC_IRQ_INT1_ADC1K: |
|
info->irq_adc = true; |
|
break; |
|
case MAX77843_MUIC_IRQ_INT2_CHGTYP: |
|
case MAX77843_MUIC_IRQ_INT2_CHGDETRUN: |
|
case MAX77843_MUIC_IRQ_INT2_DCDTMR: |
|
case MAX77843_MUIC_IRQ_INT2_DXOVP: |
|
case MAX77843_MUIC_IRQ_INT2_VBVOLT: |
|
info->irq_chg = true; |
|
break; |
|
case MAX77843_MUIC_IRQ_INT3_VBADC: |
|
case MAX77843_MUIC_IRQ_INT3_VDNMON: |
|
case MAX77843_MUIC_IRQ_INT3_DNRES: |
|
case MAX77843_MUIC_IRQ_INT3_MPNACK: |
|
case MAX77843_MUIC_IRQ_INT3_MRXBUFOW: |
|
case MAX77843_MUIC_IRQ_INT3_MRXTRF: |
|
case MAX77843_MUIC_IRQ_INT3_MRXPERR: |
|
case MAX77843_MUIC_IRQ_INT3_MRXRDY: |
|
break; |
|
default: |
|
dev_err(info->dev, "Cannot recognize IRQ(%d)\n", irq_type); |
|
break; |
|
} |
|
|
|
schedule_work(&info->irq_work); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
static void max77843_muic_detect_cable_wq(struct work_struct *work) |
|
{ |
|
struct max77843_muic_info *info = container_of(to_delayed_work(work), |
|
struct max77843_muic_info, wq_detcable); |
|
struct max77693_dev *max77843 = info->max77843; |
|
int chg_type, adc, ret; |
|
bool attached; |
|
|
|
mutex_lock(&info->mutex); |
|
|
|
ret = regmap_bulk_read(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_STATUS1, info->status, |
|
MAX77843_MUIC_STATUS_NUM); |
|
if (ret) { |
|
dev_err(info->dev, "Cannot read STATUS registers\n"); |
|
goto err_cable_wq; |
|
} |
|
|
|
adc = max77843_muic_get_cable_type(info, |
|
MAX77843_CABLE_GROUP_ADC, &attached); |
|
if (attached && adc != MAX77843_MUIC_ADC_OPEN) { |
|
ret = max77843_muic_adc_handler(info); |
|
if (ret < 0) { |
|
dev_err(info->dev, "Cannot detect accessory\n"); |
|
goto err_cable_wq; |
|
} |
|
} |
|
|
|
chg_type = max77843_muic_get_cable_type(info, |
|
MAX77843_CABLE_GROUP_CHG, &attached); |
|
if (attached && chg_type != MAX77843_MUIC_CHG_NONE) { |
|
ret = max77843_muic_chg_handler(info); |
|
if (ret < 0) { |
|
dev_err(info->dev, "Cannot detect charger accessory\n"); |
|
goto err_cable_wq; |
|
} |
|
} |
|
|
|
err_cable_wq: |
|
mutex_unlock(&info->mutex); |
|
} |
|
|
|
static int max77843_muic_set_debounce_time(struct max77843_muic_info *info, |
|
enum max77843_muic_adc_debounce_time time) |
|
{ |
|
struct max77693_dev *max77843 = info->max77843; |
|
int ret; |
|
|
|
switch (time) { |
|
case MAX77843_DEBOUNCE_TIME_5MS: |
|
case MAX77843_DEBOUNCE_TIME_10MS: |
|
case MAX77843_DEBOUNCE_TIME_25MS: |
|
case MAX77843_DEBOUNCE_TIME_38_62MS: |
|
ret = regmap_update_bits(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_CONTROL4, |
|
MAX77843_MUIC_CONTROL4_ADCDBSET_MASK, |
|
time << MAX77843_MUIC_CONTROL4_ADCDBSET_SHIFT); |
|
if (ret < 0) { |
|
dev_err(info->dev, "Cannot write MUIC regmap\n"); |
|
return ret; |
|
} |
|
break; |
|
default: |
|
dev_err(info->dev, "Invalid ADC debounce time\n"); |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int max77843_init_muic_regmap(struct max77693_dev *max77843) |
|
{ |
|
int ret; |
|
|
|
max77843->i2c_muic = i2c_new_dummy_device(max77843->i2c->adapter, |
|
I2C_ADDR_MUIC); |
|
if (IS_ERR(max77843->i2c_muic)) { |
|
dev_err(&max77843->i2c->dev, |
|
"Cannot allocate I2C device for MUIC\n"); |
|
return PTR_ERR(max77843->i2c_muic); |
|
} |
|
|
|
i2c_set_clientdata(max77843->i2c_muic, max77843); |
|
|
|
max77843->regmap_muic = devm_regmap_init_i2c(max77843->i2c_muic, |
|
&max77843_muic_regmap_config); |
|
if (IS_ERR(max77843->regmap_muic)) { |
|
ret = PTR_ERR(max77843->regmap_muic); |
|
goto err_muic_i2c; |
|
} |
|
|
|
ret = regmap_add_irq_chip(max77843->regmap_muic, max77843->irq, |
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED, |
|
0, &max77843_muic_irq_chip, &max77843->irq_data_muic); |
|
if (ret < 0) { |
|
dev_err(&max77843->i2c->dev, "Cannot add MUIC IRQ chip\n"); |
|
goto err_muic_i2c; |
|
} |
|
|
|
return 0; |
|
|
|
err_muic_i2c: |
|
i2c_unregister_device(max77843->i2c_muic); |
|
|
|
return ret; |
|
} |
|
|
|
static int max77843_muic_probe(struct platform_device *pdev) |
|
{ |
|
struct max77693_dev *max77843 = dev_get_drvdata(pdev->dev.parent); |
|
struct max77843_muic_info *info; |
|
unsigned int id; |
|
int cable_type; |
|
bool attached; |
|
int i, ret; |
|
|
|
info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
|
if (!info) |
|
return -ENOMEM; |
|
|
|
info->dev = &pdev->dev; |
|
info->max77843 = max77843; |
|
|
|
platform_set_drvdata(pdev, info); |
|
mutex_init(&info->mutex); |
|
|
|
/* Initialize i2c and regmap */ |
|
ret = max77843_init_muic_regmap(max77843); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to init MUIC regmap\n"); |
|
return ret; |
|
} |
|
|
|
/* Turn off auto detection configuration */ |
|
ret = regmap_update_bits(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_CONTROL4, |
|
MAX77843_MUIC_CONTROL4_USBAUTO_MASK | |
|
MAX77843_MUIC_CONTROL4_FCTAUTO_MASK, |
|
CONTROL4_AUTO_DISABLE); |
|
|
|
/* Initialize extcon device */ |
|
info->edev = devm_extcon_dev_allocate(&pdev->dev, |
|
max77843_extcon_cable); |
|
if (IS_ERR(info->edev)) { |
|
dev_err(&pdev->dev, "Failed to allocate memory for extcon\n"); |
|
ret = PTR_ERR(info->edev); |
|
goto err_muic_irq; |
|
} |
|
|
|
ret = devm_extcon_dev_register(&pdev->dev, info->edev); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to register extcon device\n"); |
|
goto err_muic_irq; |
|
} |
|
|
|
/* Set ADC debounce time */ |
|
max77843_muic_set_debounce_time(info, MAX77843_DEBOUNCE_TIME_25MS); |
|
|
|
/* Set initial path for UART when JIG is connected to get serial logs */ |
|
ret = regmap_bulk_read(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_STATUS1, info->status, |
|
MAX77843_MUIC_STATUS_NUM); |
|
if (ret) { |
|
dev_err(info->dev, "Cannot read STATUS registers\n"); |
|
goto err_muic_irq; |
|
} |
|
cable_type = max77843_muic_get_cable_type(info, MAX77843_CABLE_GROUP_ADC, |
|
&attached); |
|
if (attached && cable_type == MAX77843_MUIC_ADC_FACTORY_MODE_UART_OFF) |
|
max77843_muic_set_path(info, MAX77843_MUIC_CONTROL1_SW_UART, |
|
true, false); |
|
|
|
/* Check revision number of MUIC device */ |
|
ret = regmap_read(max77843->regmap_muic, MAX77843_MUIC_REG_ID, &id); |
|
if (ret < 0) { |
|
dev_err(&pdev->dev, "Failed to read revision number\n"); |
|
goto err_muic_irq; |
|
} |
|
dev_info(info->dev, "MUIC device ID : 0x%x\n", id); |
|
|
|
/* Support virtual irq domain for max77843 MUIC device */ |
|
INIT_WORK(&info->irq_work, max77843_muic_irq_work); |
|
|
|
/* Clear IRQ bits before request IRQs */ |
|
ret = regmap_bulk_read(max77843->regmap_muic, |
|
MAX77843_MUIC_REG_INT1, info->status, |
|
MAX77843_MUIC_STATUS_NUM); |
|
if (ret) { |
|
dev_err(&pdev->dev, "Failed to Clear IRQ bits\n"); |
|
goto err_muic_irq; |
|
} |
|
|
|
for (i = 0; i < ARRAY_SIZE(max77843_muic_irqs); i++) { |
|
struct max77843_muic_irq *muic_irq = &max77843_muic_irqs[i]; |
|
int virq = 0; |
|
|
|
virq = regmap_irq_get_virq(max77843->irq_data_muic, |
|
muic_irq->irq); |
|
if (virq <= 0) { |
|
ret = -EINVAL; |
|
goto err_muic_irq; |
|
} |
|
muic_irq->virq = virq; |
|
|
|
ret = devm_request_threaded_irq(&pdev->dev, virq, NULL, |
|
max77843_muic_irq_handler, IRQF_NO_SUSPEND, |
|
muic_irq->name, info); |
|
if (ret) { |
|
dev_err(&pdev->dev, |
|
"Failed to request irq (IRQ: %d, error: %d)\n", |
|
muic_irq->irq, ret); |
|
goto err_muic_irq; |
|
} |
|
} |
|
|
|
/* Detect accessory after completing the initialization of platform */ |
|
INIT_DELAYED_WORK(&info->wq_detcable, max77843_muic_detect_cable_wq); |
|
queue_delayed_work(system_power_efficient_wq, |
|
&info->wq_detcable, msecs_to_jiffies(DELAY_MS_DEFAULT)); |
|
|
|
return 0; |
|
|
|
err_muic_irq: |
|
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); |
|
i2c_unregister_device(max77843->i2c_muic); |
|
|
|
return ret; |
|
} |
|
|
|
static int max77843_muic_remove(struct platform_device *pdev) |
|
{ |
|
struct max77843_muic_info *info = platform_get_drvdata(pdev); |
|
struct max77693_dev *max77843 = info->max77843; |
|
|
|
cancel_work_sync(&info->irq_work); |
|
regmap_del_irq_chip(max77843->irq, max77843->irq_data_muic); |
|
i2c_unregister_device(max77843->i2c_muic); |
|
|
|
return 0; |
|
} |
|
|
|
static const struct platform_device_id max77843_muic_id[] = { |
|
{ "max77843-muic", }, |
|
{ /* sentinel */ }, |
|
}; |
|
MODULE_DEVICE_TABLE(platform, max77843_muic_id); |
|
|
|
static struct platform_driver max77843_muic_driver = { |
|
.driver = { |
|
.name = "max77843-muic", |
|
}, |
|
.probe = max77843_muic_probe, |
|
.remove = max77843_muic_remove, |
|
.id_table = max77843_muic_id, |
|
}; |
|
|
|
static int __init max77843_muic_init(void) |
|
{ |
|
return platform_driver_register(&max77843_muic_driver); |
|
} |
|
subsys_initcall(max77843_muic_init); |
|
|
|
MODULE_DESCRIPTION("Maxim MAX77843 Extcon driver"); |
|
MODULE_AUTHOR("Jaewon Kim <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|