diff options
Diffstat (limited to 'include/linux/extcon')
| -rw-r--r-- | include/linux/extcon/extcon-adc-jack.h | 70 | ||||
| -rw-r--r-- | include/linux/extcon/extcon-gpio.h | 47 |
2 files changed, 117 insertions, 0 deletions
diff --git a/include/linux/extcon/extcon-adc-jack.h b/include/linux/extcon/extcon-adc-jack.h new file mode 100644 index 000000000000..53c60806bcfb --- /dev/null +++ b/include/linux/extcon/extcon-adc-jack.h @@ -0,0 +1,70 @@ +/* + * include/linux/extcon/extcon-adc-jack.h + * + * Analog Jack extcon driver with ADC-based detection capability. + * + * Copyright (C) 2012 Samsung Electronics + * MyungJoo Ham <myungjoo.ham@samsung.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#ifndef _EXTCON_ADC_JACK_H_ +#define _EXTCON_ADC_JACK_H_ __FILE__ + +#include <linux/module.h> +#include <linux/extcon.h> + +/** + * struct adc_jack_cond - condition to use an extcon state + * @state: the corresponding extcon state (if 0, this struct + * denotes the last adc_jack_cond element among the array) + * @min_adc: min adc value for this condition + * @max_adc: max adc value for this condition + * + * For example, if { .state = 0x3, .min_adc = 100, .max_adc = 200}, it means + * that if ADC value is between (inclusive) 100 and 200, than the cable 0 and + * 1 are attached (1<<0 | 1<<1 == 0x3) + * + * Note that you don't need to describe condition for "no cable attached" + * because when no adc_jack_cond is met, state = 0 is automatically chosen. + */ +struct adc_jack_cond { + u32 state; /* extcon state value. 0 if invalid */ + u32 min_adc; + u32 max_adc; +}; + +/** + * struct adc_jack_pdata - platform data for adc jack device. + * @name: name of the extcon device. If null, "adc-jack" is used. + * @consumer_channel: Unique name to identify the channel on the consumer + * side. This typically describes the channels used within + * the consumer. E.g. 'battery_voltage' + * @cable_names: array of extcon id for supported cables. + * @adc_contitions: array of struct adc_jack_cond conditions ending + * with .state = 0 entry. This describes how to decode + * adc values into extcon state. + * @irq_flags: irq flags used for the @irq + * @handling_delay_ms: in some devices, we need to read ADC value some + * milli-seconds after the interrupt occurs. You may + * describe such delays with @handling_delay_ms, which + * is rounded-off by jiffies. + */ +struct adc_jack_pdata { + const char *name; + const char *consumer_channel; + + const enum extcon *cable_names; + + /* The last entry's state should be 0 */ + struct adc_jack_cond *adc_conditions; + + unsigned long irq_flags; + unsigned long handling_delay_ms; /* in ms */ +}; + +#endif /* _EXTCON_ADC_JACK_H */ diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h new file mode 100644 index 000000000000..7cacafb78b09 --- /dev/null +++ b/include/linux/extcon/extcon-gpio.h @@ -0,0 +1,47 @@ +/* + * Single-state GPIO extcon driver based on extcon class + * + * Copyright (C) 2012 Samsung Electronics + * Author: MyungJoo Ham <myungjoo.ham@samsung.com> + * + * based on switch class driver + * Copyright (C) 2008 Google, Inc. + * Author: Mike Lockwood <lockwood@android.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ +#ifndef __EXTCON_GPIO_H__ +#define __EXTCON_GPIO_H__ __FILE__ + +#include <linux/extcon.h> + +/** + * struct gpio_extcon_pdata - A simple GPIO-controlled extcon device. + * @extcon_id: The unique id of specific external connector. + * @gpio: Corresponding GPIO. + * @gpio_active_low: Boolean describing whether gpio active state is 1 or 0 + * If true, low state of gpio means active. + * If false, high state of gpio means active. + * @debounce: Debounce time for GPIO IRQ in ms. + * @irq_flags: IRQ Flags (e.g., IRQF_TRIGGER_LOW). + * @check_on_resume: Boolean describing whether to check the state of gpio + * while resuming from sleep. + */ +struct gpio_extcon_pdata { + unsigned int extcon_id; + unsigned gpio; + bool gpio_active_low; + unsigned long debounce; + unsigned long irq_flags; + + bool check_on_resume; +}; + +#endif /* __EXTCON_GPIO_H__ */ |