projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 19939860 | 1 | /* |
| 2 | * include/linux/extcon/extcon-adc-jack.h | |
| 3 | * | |
| 4 | * Analog Jack extcon driver with ADC-based detection capability. | |
| 5 | * | |
| 6 | * Copyright (C) 2012 Samsung Electronics | |
| 7 | * MyungJoo Ham <myungjoo.ham@samsung.com> | |
| 8 | * | |
| 9 | * This program is free software; you can redistribute it and/or modify | |
| 10 | * it under the terms of the GNU General Public License version 2 as | |
| 11 | * published by the Free Software Foundation. | |
| 12 | * | |
| 13 | */ | |
| 14 | ||
| 15 | #ifndef _EXTCON_ADC_JACK_H_ | |
| 16 | #define _EXTCON_ADC_JACK_H_ __FILE__ | |
| 17 | ||
| 18 | #include <linux/module.h> | |
| 19 | #include <linux/extcon.h> | |
| 20 | ||
| 21 | /** | |
| 22 | * struct adc_jack_cond - condition to use an extcon state | |
| a75e1c73 | 23 | * denotes the last adc_jack_cond element among the array) |
| a7da72ee | 24 | * @id: the unique id of each external connector |
| a75e1c73 CC |
25 | * @min_adc: min adc value for this condition |
| 26 | * @max_adc: max adc value for this condition | |
| 19939860 | 27 | * |
| 28 | * For example, if { .state = 0x3, .min_adc = 100, .max_adc = 200}, it means | |
| 29 | * that if ADC value is between (inclusive) 100 and 200, than the cable 0 and | |
| 30 | * 1 are attached (1<<0 | 1<<1 == 0x3) | |
| 31 | * | |
| 32 | * Note that you don't need to describe condition for "no cable attached" | |
| 33 | * because when no adc_jack_cond is met, state = 0 is automatically chosen. | |
| 34 | */ | |
| 35 | struct adc_jack_cond { | |
| a7da72ee | 36 | unsigned int id; |
| 19939860 | 37 | u32 min_adc; |
| 38 | u32 max_adc; | |
| 39 | }; | |
| 40 | ||
| 41 | /** | |
| 42 | * struct adc_jack_pdata - platform data for adc jack device. | |
| a75e1c73 CC |
43 | * @name: name of the extcon device. If null, "adc-jack" is used. |
| 44 | * @consumer_channel: Unique name to identify the channel on the consumer | |
| 45 | * side. This typically describes the channels used within | |
| 46 | * the consumer. E.g. 'battery_voltage' | |
| 2a9de9c0 | 47 | * @cable_names: array of extcon id for supported cables. |
| a75e1c73 CC |
48 | * @adc_contitions: array of struct adc_jack_cond conditions ending |
| 49 | * with .state = 0 entry. This describes how to decode | |
| 50 | * adc values into extcon state. | |
| 51 | * @irq_flags: irq flags used for the @irq | |
| 52 | * @handling_delay_ms: in some devices, we need to read ADC value some | |
| 53 | * milli-seconds after the interrupt occurs. You may | |
| 54 | * describe such delays with @handling_delay_ms, which | |
| 55 | * is rounded-off by jiffies. | |
| 1b6cf310 | 56 | * @wakeup_source: flag to wake up the system for extcon events. |
| 19939860 | 57 | */ |
| 58 | struct adc_jack_pdata { | |
| 59 | const char *name; | |
| 60 | const char *consumer_channel; | |
| a75e1c73 | 61 | |
| 8a522bf2 | 62 | const unsigned int *cable_names; |
| a75e1c73 | 63 | |
| 19939860 | 64 | /* The last entry's state should be 0 */ |
| 65 | struct adc_jack_cond *adc_conditions; | |
| 66 | ||
| 67 | unsigned long irq_flags; | |
| 68 | unsigned long handling_delay_ms; /* in ms */ | |
| 1b6cf310 | 69 | bool wakeup_source; |
| 19939860 | 70 | }; |
| 71 | ||
| 72 | #endif /* _EXTCON_ADC_JACK_H */ |