// SPDX-License-Identifier: GPL-2.0 /* * IIO driver for Maxim MAX34409/34408 ADC, 4-Channels/2-Channels, 8bits, I2C * * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/MAX34408-MAX34409.pdf * * TODO: ALERT interrupt, Overcurrent delay, Shutdown delay */ #include <linux/bitfield.h> #include <linux/init.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/iio/iio.h> #include <linux/iio/types.h> #define MAX34408_STATUS_REG … #define MAX34408_CONTROL_REG … #define MAX34408_OCDELAY_REG … #define MAX34408_SDDELAY_REG … #define MAX34408_ADC1_REG … #define MAX34408_ADC2_REG … /* ADC3 & ADC4 always returns 0x0 on 34408 */ #define MAX34409_ADC3_REG … #define MAX34409_ADC4_REG … #define MAX34408_OCT1_REG … #define MAX34408_OCT2_REG … #define MAX34409_OCT3_REG … #define MAX34409_OCT4_REG … #define MAX34408_DID_REG … #define MAX34408_DCYY_REG … #define MAX34408_DCWW_REG … /* Bit masks for status register */ #define MAX34408_STATUS_OC_MSK … #define MAX34409_STATUS_OC_MSK … #define MAX34408_STATUS_SHTDN … #define MAX34408_STATUS_ENA … /* Bit masks for control register */ #define MAX34408_CONTROL_AVG0 … #define MAX34408_CONTROL_AVG1 … #define MAX34408_CONTROL_AVG2 … #define MAX34408_CONTROL_ALERT … #define MAX34408_DEFAULT_AVG … /* Bit masks for over current delay */ #define MAX34408_OCDELAY_OCD_MSK … #define MAX34408_OCDELAY_RESET … /* Bit masks for shutdown delay */ #define MAX34408_SDDELAY_SHD_MSK … #define MAX34408_SDDELAY_RESET … #define MAX34408_DEFAULT_RSENSE … /** * struct max34408_data - max34408/max34409 specific data. * @regmap: device register map. * @dev: max34408 device. * @lock: lock for protecting access to device hardware registers, mostly * for read modify write cycles for control registers. * @input_rsense: Rsense values in uOhm, will be overwritten by * values from channel nodes. */ struct max34408_data { … }; static const struct regmap_config max34408_regmap_config = …; struct max34408_adc_model_data { … }; #define MAX34008_CHANNEL(_index, _address) … static const struct iio_chan_spec max34408_channels[] = …; static const struct iio_chan_spec max34409_channels[] = …; static int max34408_read_adc_avg(struct max34408_data *max34408, const struct iio_chan_spec *chan, int *val) { … } static int max34408_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static const struct iio_info max34408_info = …; static const struct max34408_adc_model_data max34408_model_data = …; static const struct max34408_adc_model_data max34409_model_data = …; static int max34408_probe(struct i2c_client *client) { … } static const struct of_device_id max34408_of_match[] = …; MODULE_DEVICE_TABLE(of, max34408_of_match); static const struct i2c_device_id max34408_id[] = …; MODULE_DEVICE_TABLE(i2c, max34408_id); static struct i2c_driver max34408_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux