mirror of https://gitee.com/openkylin/linux.git
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/**
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* Copyright (c) 2011 Jonathan Cameron
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*
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* Join together the various functionality of iio_simple_dummy driver
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*/
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#ifndef _IIO_SIMPLE_DUMMY_H_
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#define _IIO_SIMPLE_DUMMY_H_
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#include <linux/kernel.h>
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struct iio_dummy_accel_calibscale;
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struct iio_dummy_regs;
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/**
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* struct iio_dummy_state - device instance specific state.
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* @dac_val: cache for dac value
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* @single_ended_adc_val: cache for single ended adc value
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* @differential_adc_val: cache for differential adc value
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* @accel_val: cache for acceleration value
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* @accel_calibbias: cache for acceleration calibbias
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* @accel_calibscale: cache for acceleration calibscale
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* @lock: lock to ensure state is consistent
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* @event_irq: irq number for event line (faked)
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* @event_val: cache for event threshold value
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* @event_en: cache of whether event is enabled
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*/
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struct iio_dummy_state {
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int dac_val;
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int single_ended_adc_val;
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int differential_adc_val[2];
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int accel_val;
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int accel_calibbias;
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int activity_running;
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int activity_walking;
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const struct iio_dummy_accel_calibscale *accel_calibscale;
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struct mutex lock;
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struct iio_dummy_regs *regs;
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int steps_enabled;
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int steps;
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int height;
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#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
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int event_irq;
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int event_val;
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bool event_en;
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s64 event_timestamp;
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#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
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};
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#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
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struct iio_dev;
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int iio_simple_dummy_read_event_config(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir);
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int iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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int state);
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int iio_simple_dummy_read_event_value(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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enum iio_event_info info, int *val,
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int *val2);
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int iio_simple_dummy_write_event_value(struct iio_dev *indio_dev,
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const struct iio_chan_spec *chan,
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enum iio_event_type type,
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enum iio_event_direction dir,
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enum iio_event_info info, int val,
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int val2);
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int iio_simple_dummy_events_register(struct iio_dev *indio_dev);
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void iio_simple_dummy_events_unregister(struct iio_dev *indio_dev);
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#else /* Stubs for when events are disabled at compile time */
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static inline int
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iio_simple_dummy_events_register(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline void
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iio_simple_dummy_events_unregister(struct iio_dev *indio_dev)
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{}
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#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS*/
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/**
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* enum iio_simple_dummy_scan_elements - scan index enum
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* @DUMMY_INDEX_VOLTAGE_0: the single ended voltage channel
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* @DUMMY_INDEX_DIFFVOLTAGE_1M2: first differential channel
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* @DUMMY_INDEX_DIFFVOLTAGE_3M4: second differential channel
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* @DUMMY_INDEX_ACCELX: acceleration channel
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*
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* Enum provides convenient numbering for the scan index.
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*/
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enum iio_simple_dummy_scan_elements {
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DUMMY_INDEX_VOLTAGE_0,
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DUMMY_INDEX_DIFFVOLTAGE_1M2,
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DUMMY_INDEX_DIFFVOLTAGE_3M4,
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DUMMY_INDEX_ACCELX,
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};
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#ifdef CONFIG_IIO_SIMPLE_DUMMY_BUFFER
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int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev);
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void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev);
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#else
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static inline int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)
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{
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return 0;
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}
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static inline
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void iio_simple_dummy_unconfigure_buffer(struct iio_dev *indio_dev)
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{}
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#endif /* CONFIG_IIO_SIMPLE_DUMMY_BUFFER */
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#endif /* _IIO_SIMPLE_DUMMY_H_ */
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