// SPDX-License-Identifier: GPL-2.0-only /* * ADS1015 - Texas Instruments Analog-to-Digital Converter * * Copyright (c) 2016, Intel Corporation. * * IIO driver for ADS1015 ADC 7-bit I2C slave address: * * 0x48 - ADDR connected to Ground * * 0x49 - ADDR connected to Vdd * * 0x4A - ADDR connected to SDA * * 0x4B - ADDR connected to SCL */ #include <linux/module.h> #include <linux/init.h> #include <linux/irq.h> #include <linux/i2c.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/pm_runtime.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/iio/iio.h> #include <linux/iio/types.h> #include <linux/iio/sysfs.h> #include <linux/iio/events.h> #include <linux/iio/buffer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/trigger_consumer.h> #define ADS1015_DRV_NAME … #define ADS1015_CHANNELS … #define ADS1015_CONV_REG … #define ADS1015_CFG_REG … #define ADS1015_LO_THRESH_REG … #define ADS1015_HI_THRESH_REG … #define ADS1015_CFG_COMP_QUE_SHIFT … #define ADS1015_CFG_COMP_LAT_SHIFT … #define ADS1015_CFG_COMP_POL_SHIFT … #define ADS1015_CFG_COMP_MODE_SHIFT … #define ADS1015_CFG_DR_SHIFT … #define ADS1015_CFG_MOD_SHIFT … #define ADS1015_CFG_PGA_SHIFT … #define ADS1015_CFG_MUX_SHIFT … #define ADS1015_CFG_COMP_QUE_MASK … #define ADS1015_CFG_COMP_LAT_MASK … #define ADS1015_CFG_COMP_POL_MASK … #define ADS1015_CFG_COMP_MODE_MASK … #define ADS1015_CFG_DR_MASK … #define ADS1015_CFG_MOD_MASK … #define ADS1015_CFG_PGA_MASK … #define ADS1015_CFG_MUX_MASK … /* Comparator queue and disable field */ #define ADS1015_CFG_COMP_DISABLE … /* Comparator polarity field */ #define ADS1015_CFG_COMP_POL_LOW … #define ADS1015_CFG_COMP_POL_HIGH … /* Comparator mode field */ #define ADS1015_CFG_COMP_MODE_TRAD … #define ADS1015_CFG_COMP_MODE_WINDOW … /* device operating modes */ #define ADS1015_CONTINUOUS … #define ADS1015_SINGLESHOT … #define ADS1015_SLEEP_DELAY_MS … #define ADS1015_DEFAULT_PGA … #define ADS1015_DEFAULT_DATA_RATE … #define ADS1015_DEFAULT_CHAN … struct ads1015_chip_data { … }; enum ads1015_channels { … }; static const int ads1015_data_rate[] = …; static const int ads1115_data_rate[] = …; /* * Translation from PGA bits to full-scale positive and negative input voltage * range in mV */ static const int ads1015_fullscale_range[] = …; static const int ads1015_scale[] = …; static const int ads1115_scale[] = …; /* * Translation from COMP_QUE field value to the number of successive readings * exceed the threshold values before an interrupt is generated */ static const int ads1015_comp_queue[] = …; static const struct iio_event_spec ads1015_events[] = …; /* * Compile-time check whether _fitbits can accommodate up to _testbits * bits. Returns _fitbits on success, fails to compile otherwise. * * The test works such that it multiplies constant _fitbits by constant * double-negation of size of a non-empty structure, i.e. it multiplies * constant _fitbits by constant 1 in each successful compilation case. * The non-empty structure may contain C11 _Static_assert(), make use of * this and place the kernel variant of static assert in there, so that * it performs the compile-time check for _testbits <= _fitbits. Note * that it is not possible to directly use static_assert in compound * statements, hence this convoluted construct. */ #define FIT_CHECK(_testbits, _fitbits) … #define ADS1015_V_CHAN(_chan, _addr, _realbits, _shift, _event_spec, _num_event_specs) … #define ADS1015_V_DIFF_CHAN(_chan, _chan2, _addr, _realbits, _shift, _event_spec, _num_event_specs) … struct ads1015_channel_data { … }; struct ads1015_thresh_data { … }; struct ads1015_data { … }; static bool ads1015_event_channel_enabled(struct ads1015_data *data) { … } static void ads1015_event_channel_enable(struct ads1015_data *data, int chan, int comp_mode) { … } static void ads1015_event_channel_disable(struct ads1015_data *data, int chan) { … } static const struct regmap_range ads1015_writeable_ranges[] = …; static const struct regmap_access_table ads1015_writeable_table = …; static const struct regmap_config ads1015_regmap_config = …; static const struct regmap_range tla2024_writeable_ranges[] = …; static const struct regmap_access_table tla2024_writeable_table = …; static const struct regmap_config tla2024_regmap_config = …; static const struct iio_chan_spec ads1015_channels[] = …; static const struct iio_chan_spec ads1115_channels[] = …; static const struct iio_chan_spec tla2024_channels[] = …; #ifdef CONFIG_PM static int ads1015_set_power_state(struct ads1015_data *data, bool on) { … } #else /* !CONFIG_PM */ static int ads1015_set_power_state(struct ads1015_data *data, bool on) { return 0; } #endif /* !CONFIG_PM */ static int ads1015_get_adc_result(struct ads1015_data *data, int chan, int *val) { … } static irqreturn_t ads1015_trigger_handler(int irq, void *p) { … } static int ads1015_set_scale(struct ads1015_data *data, struct iio_chan_spec const *chan, int scale, int uscale) { … } static int ads1015_set_data_rate(struct ads1015_data *data, int chan, int rate) { … } static int ads1015_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static int ads1015_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int ads1015_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int ads1015_read_event(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 ads1015_write_event(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 ads1015_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 ads1015_enable_event_config(struct ads1015_data *data, const struct iio_chan_spec *chan, int comp_mode) { … } static int ads1015_disable_event_config(struct ads1015_data *data, const struct iio_chan_spec *chan, int comp_mode) { … } static int ads1015_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 irqreturn_t ads1015_event_handler(int irq, void *priv) { … } static int ads1015_buffer_preenable(struct iio_dev *indio_dev) { … } static int ads1015_buffer_postdisable(struct iio_dev *indio_dev) { … } static const struct iio_buffer_setup_ops ads1015_buffer_setup_ops = …; static const struct iio_info ads1015_info = …; static const struct iio_info tla2024_info = …; static int ads1015_client_get_channels_config(struct i2c_client *client) { … } static void ads1015_get_channels_config(struct i2c_client *client) { … } static int ads1015_set_conv_mode(struct ads1015_data *data, int mode) { … } static int ads1015_probe(struct i2c_client *client) { … } static void ads1015_remove(struct i2c_client *client) { … } #ifdef CONFIG_PM static int ads1015_runtime_suspend(struct device *dev) { … } static int ads1015_runtime_resume(struct device *dev) { … } #endif static const struct dev_pm_ops ads1015_pm_ops = …; static const struct ads1015_chip_data ads1015_data = …; static const struct ads1015_chip_data ads1115_data = …; static const struct ads1015_chip_data tla2024_data = …; static const struct i2c_device_id ads1015_id[] = …; MODULE_DEVICE_TABLE(i2c, ads1015_id); static const struct of_device_id ads1015_of_match[] = …; MODULE_DEVICE_TABLE(of, ads1015_of_match); static struct i2c_driver ads1015_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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