69 строки
2.2 KiB
C
69 строки
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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
|
|
* denotes the last adc_jack_cond element among the array)
|
|
* @id: the unique id of each external connector
|
|
* @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 {
|
|
unsigned int id;
|
|
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.
|
|
* @wakeup_source: flag to wake up the system for extcon events.
|
|
*/
|
|
struct adc_jack_pdata {
|
|
const char *name;
|
|
const char *consumer_channel;
|
|
|
|
const unsigned int *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 */
|
|
bool wakeup_source;
|
|
};
|
|
|
|
#endif /* _EXTCON_ADC_JACK_H */
|