// SPDX-License-Identifier: GPL-2.0-only /* * iio/adc/ad799x.c * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc. * * based on iio/adc/max1363 * Copyright (C) 2008-2010 Jonathan Cameron * * based on linux/drivers/i2c/chips/max123x * Copyright (C) 2002-2004 Stefan Eletzhofer * * based on linux/drivers/acron/char/pcf8583.c * Copyright (C) 2000 Russell King * * ad799x.c * * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997, * ad7998 and similar chips. */ #include <linux/interrupt.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/sysfs.h> #include <linux/i2c.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/err.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/bitops.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #define AD799X_CHANNEL_SHIFT … /* * AD7991, AD7995 and AD7999 defines */ #define AD7991_REF_SEL … #define AD7991_FLTR … #define AD7991_BIT_TRIAL_DELAY … #define AD7991_SAMPLE_DELAY … /* * AD7992, AD7993, AD7994, AD7997 and AD7998 defines */ #define AD7998_FLTR … #define AD7998_ALERT_EN … #define AD7998_BUSY_ALERT … #define AD7998_BUSY_ALERT_POL … #define AD7998_CONV_RES_REG … #define AD7998_ALERT_STAT_REG … #define AD7998_CONF_REG … #define AD7998_CYCLE_TMR_REG … #define AD7998_DATALOW_REG(x) … #define AD7998_DATAHIGH_REG(x) … #define AD7998_HYST_REG(x) … #define AD7998_CYC_MASK … #define AD7998_CYC_DIS … #define AD7998_CYC_TCONF_32 … #define AD7998_CYC_TCONF_64 … #define AD7998_CYC_TCONF_128 … #define AD7998_CYC_TCONF_256 … #define AD7998_CYC_TCONF_512 … #define AD7998_CYC_TCONF_1024 … #define AD7998_CYC_TCONF_2048 … #define AD7998_ALERT_STAT_CLEAR … /* * AD7997 and AD7997 defines */ #define AD7997_8_READ_SINGLE … #define AD7997_8_READ_SEQUENCE … enum { … }; /** * struct ad799x_chip_config - chip specific information * @channel: channel specification * @default_config: device default configuration * @info: pointer to iio_info struct */ struct ad799x_chip_config { … }; /** * struct ad799x_chip_info - chip specific information * @num_channels: number of channels * @noirq_config: device configuration w/o IRQ * @irq_config: device configuration w/IRQ */ struct ad799x_chip_info { … }; struct ad799x_state { … }; static int ad799x_write_config(struct ad799x_state *st, u16 val) { … } static int ad799x_read_config(struct ad799x_state *st) { … } static int ad799x_update_config(struct ad799x_state *st, u16 config) { … } static irqreturn_t ad799x_trigger_handler(int irq, void *p) { … } static int ad799x_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { … } static int ad799x_scan_direct(struct ad799x_state *st, unsigned int ch) { … } static int ad799x_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { … } static const unsigned int ad7998_frequencies[] = …; static ssize_t ad799x_read_frequency(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad799x_write_frequency(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static int ad799x_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int ad799x_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { … } static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan, enum iio_event_direction dir, enum iio_event_info info) { … } static int ad799x_write_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { … } static int ad799x_read_event_value(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { … } static irqreturn_t ad799x_event_handler(int irq, void *private) { … } static IIO_DEV_ATTR_SAMP_FREQ(0644, ad799x_read_frequency, ad799x_write_frequency); static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0"); static struct attribute *ad799x_event_attributes[] = …; static const struct attribute_group ad799x_event_attrs_group = …; static const struct iio_info ad7991_info = …; static const struct iio_info ad7993_4_7_8_noirq_info = …; static const struct iio_info ad7993_4_7_8_irq_info = …; static const struct iio_event_spec ad799x_events[] = …; #define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) … #define AD799X_CHANNEL(_index, _realbits) … #define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) … static const struct ad799x_chip_info ad799x_chip_info_tbl[] = …; static int ad799x_probe(struct i2c_client *client) { … } static void ad799x_remove(struct i2c_client *client) { … } static int ad799x_suspend(struct device *dev) { … } static int ad799x_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(ad799x_pm_ops, ad799x_suspend, ad799x_resume); static const struct i2c_device_id ad799x_id[] = …; MODULE_DEVICE_TABLE(i2c, ad799x_id); static struct i2c_driver ad799x_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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