// SPDX-License-Identifier: GPL-2.0+ // // extcon-max77693.c - MAX77693 extcon driver to support MAX77693 MUIC // // Copyright (C) 2012 Samsung Electrnoics // Chanwoo Choi <[email protected]> #include <linux/devm-helpers.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/slab.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/mfd/max77693.h> #include <linux/mfd/max77693-common.h> #include <linux/mfd/max77693-private.h> #include <linux/extcon-provider.h> #include <linux/regmap.h> #include <linux/irqdomain.h> #define DEV_NAME … #define DELAY_MS_DEFAULT … /* * Default value of MAX77693 register to bring up MUIC device. * If user don't set some initial value for MUIC device through platform data, * extcon-max77693 driver use 'default_init_data' to bring up base operation * of MAX77693 MUIC device. */ static struct max77693_reg_data default_init_data[] = …; enum max77693_muic_adc_debounce_time { … }; struct max77693_muic_info { … }; enum max77693_muic_cable_group { … }; enum max77693_muic_charger_type { … }; /** * struct max77693_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 max77693_muic_irq { … }; static struct max77693_muic_irq muic_irqs[] = …; /* Define supported accessory type */ enum max77693_muic_acc_type { … }; /* * MAX77693 MUIC device support below list of accessories(external connector) */ static const unsigned int max77693_extcon_cable[] = …; /* * max77693_muic_set_debounce_time - Set the debounce time of ADC * @info: the instance including private data of max77693 MUIC * @time: the debounce time of ADC */ static int max77693_muic_set_debounce_time(struct max77693_muic_info *info, enum max77693_muic_adc_debounce_time time) { int ret; switch (time) { case ADC_DEBOUNCE_TIME_5MS: case ADC_DEBOUNCE_TIME_10MS: case ADC_DEBOUNCE_TIME_25MS: case ADC_DEBOUNCE_TIME_38_62MS: /* * Don't touch BTLDset, JIGset when you want to change adc * debounce time. If it writes other than 0 to BTLDset, JIGset * muic device will be reset and loose current state. */ ret = regmap_write(info->max77693->regmap_muic, MAX77693_MUIC_REG_CTRL3, time << MAX77693_CONTROL3_ADCDBSET_SHIFT); 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; }; /* * max77693_muic_set_path - Set hardware line according to attached cable * @info: the instance including private data of max77693 MUIC * @value: the path according to attached cable * @attached: the state of cable (true:attached, false:detached) * * The max77693 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 max77693_muic_set_path(struct max77693_muic_info *info, u8 val, bool attached) { … } /* * max77693_muic_get_cable_type - Return cable type and check cable state * @info: the instance including private data of max77693 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. * - MAX77693_CABLE_GROUP_ADC * - MAX77693_CABLE_GROUP_ADC_GND * - MAX77693_CABLE_GROUP_CHG * - MAX77693_CABLE_GROUP_VBVOLT */ static int max77693_muic_get_cable_type(struct max77693_muic_info *info, enum max77693_muic_cable_group group, bool *attached) { … } static int max77693_muic_dock_handler(struct max77693_muic_info *info, int cable_type, bool attached) { … } static int max77693_muic_dock_button_handler(struct max77693_muic_info *info, int button_type, bool attached) { … } static int max77693_muic_adc_ground_handler(struct max77693_muic_info *info) { … } static int max77693_muic_jig_handler(struct max77693_muic_info *info, int cable_type, bool attached) { … } static int max77693_muic_adc_handler(struct max77693_muic_info *info) { … } static int max77693_muic_chg_handler(struct max77693_muic_info *info) { … } static void max77693_muic_irq_work(struct work_struct *work) { … } static irqreturn_t max77693_muic_irq_handler(int irq, void *data) { … } static const struct regmap_config max77693_muic_regmap_config = …; static int max77693_muic_detect_accessory(struct max77693_muic_info *info) { … } static void max77693_muic_detect_cable_wq(struct work_struct *work) { … } static int max77693_muic_probe(struct platform_device *pdev) { … } static const struct of_device_id of_max77693_muic_dt_match[] = …; MODULE_DEVICE_TABLE(of, of_max77693_muic_dt_match); static struct platform_driver max77693_muic_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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