// SPDX-License-Identifier: GPL-2.0+ /* * AD7124 SPI ADC driver * * Copyright 2018 Analog Devices Inc. */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/kfifo.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <linux/iio/iio.h> #include <linux/iio/adc/ad_sigma_delta.h> #include <linux/iio/sysfs.h> /* AD7124 registers */ #define AD7124_COMMS … #define AD7124_STATUS … #define AD7124_ADC_CONTROL … #define AD7124_DATA … #define AD7124_IO_CONTROL_1 … #define AD7124_IO_CONTROL_2 … #define AD7124_ID … #define AD7124_ERROR … #define AD7124_ERROR_EN … #define AD7124_MCLK_COUNT … #define AD7124_CHANNEL(x) … #define AD7124_CONFIG(x) … #define AD7124_FILTER(x) … #define AD7124_OFFSET(x) … #define AD7124_GAIN(x) … /* AD7124_STATUS */ #define AD7124_STATUS_POR_FLAG_MSK … /* AD7124_ADC_CONTROL */ #define AD7124_ADC_STATUS_EN_MSK … #define AD7124_ADC_STATUS_EN(x) … #define AD7124_ADC_CTRL_REF_EN_MSK … #define AD7124_ADC_CTRL_REF_EN(x) … #define AD7124_ADC_CTRL_PWR_MSK … #define AD7124_ADC_CTRL_PWR(x) … #define AD7124_ADC_CTRL_MODE_MSK … #define AD7124_ADC_CTRL_MODE(x) … /* AD7124 ID */ #define AD7124_DEVICE_ID_MSK … #define AD7124_DEVICE_ID_GET(x) … #define AD7124_SILICON_REV_MSK … #define AD7124_SILICON_REV_GET(x) … #define CHIPID_AD7124_4 … #define CHIPID_AD7124_8 … /* AD7124_CHANNEL_X */ #define AD7124_CHANNEL_EN_MSK … #define AD7124_CHANNEL_EN(x) … #define AD7124_CHANNEL_SETUP_MSK … #define AD7124_CHANNEL_SETUP(x) … #define AD7124_CHANNEL_AINP_MSK … #define AD7124_CHANNEL_AINP(x) … #define AD7124_CHANNEL_AINM_MSK … #define AD7124_CHANNEL_AINM(x) … /* AD7124_CONFIG_X */ #define AD7124_CONFIG_BIPOLAR_MSK … #define AD7124_CONFIG_BIPOLAR(x) … #define AD7124_CONFIG_REF_SEL_MSK … #define AD7124_CONFIG_REF_SEL(x) … #define AD7124_CONFIG_PGA_MSK … #define AD7124_CONFIG_PGA(x) … #define AD7124_CONFIG_IN_BUFF_MSK … #define AD7124_CONFIG_IN_BUFF(x) … /* AD7124_FILTER_X */ #define AD7124_FILTER_FS_MSK … #define AD7124_FILTER_FS(x) … #define AD7124_FILTER_TYPE_MSK … #define AD7124_FILTER_TYPE_SEL(x) … #define AD7124_SINC3_FILTER … #define AD7124_SINC4_FILTER … #define AD7124_CONF_ADDR_OFFSET … #define AD7124_MAX_CONFIGS … #define AD7124_MAX_CHANNELS … enum ad7124_ids { … }; enum ad7124_ref_sel { … }; enum ad7124_power_mode { … }; static const unsigned int ad7124_gain[8] = …; static const unsigned int ad7124_reg_size[] = …; static const int ad7124_master_clk_freq_hz[3] = …; static const char * const ad7124_ref_names[] = …; struct ad7124_chip_info { … }; struct ad7124_channel_config { … }; struct ad7124_channel { … }; struct ad7124_state { … }; static const struct iio_chan_spec ad7124_channel_template = …; static struct ad7124_chip_info ad7124_chip_info_tbl[] = …; static int ad7124_find_closest_match(const int *array, unsigned int size, int val) { … } static int ad7124_spi_write_mask(struct ad7124_state *st, unsigned int addr, unsigned long mask, unsigned int val, unsigned int bytes) { … } static int ad7124_set_mode(struct ad_sigma_delta *sd, enum ad_sigma_delta_mode mode) { … } static void ad7124_set_channel_odr(struct ad7124_state *st, unsigned int channel, unsigned int odr) { … } static int ad7124_get_3db_filter_freq(struct ad7124_state *st, unsigned int channel) { … } static void ad7124_set_3db_filter_freq(struct ad7124_state *st, unsigned int channel, unsigned int freq) { … } static struct ad7124_channel_config *ad7124_find_similar_live_cfg(struct ad7124_state *st, struct ad7124_channel_config *cfg) { … } static int ad7124_find_free_config_slot(struct ad7124_state *st) { … } static int ad7124_init_config_vref(struct ad7124_state *st, struct ad7124_channel_config *cfg) { … } static int ad7124_write_config(struct ad7124_state *st, struct ad7124_channel_config *cfg, unsigned int cfg_slot) { … } static struct ad7124_channel_config *ad7124_pop_config(struct ad7124_state *st) { … } static int ad7124_push_config(struct ad7124_state *st, struct ad7124_channel_config *cfg) { … } static int ad7124_enable_channel(struct ad7124_state *st, struct ad7124_channel *ch) { … } static int ad7124_prepare_read(struct ad7124_state *st, int address) { … } static int __ad7124_set_channel(struct ad_sigma_delta *sd, unsigned int channel) { … } static int ad7124_set_channel(struct ad_sigma_delta *sd, unsigned int channel) { … } static int ad7124_append_status(struct ad_sigma_delta *sd, bool append) { … } static int ad7124_disable_all(struct ad_sigma_delta *sd) { … } static int ad7124_disable_one(struct ad_sigma_delta *sd, unsigned int chan) { … } static const struct ad_sigma_delta_info ad7124_sigma_delta_info = …; static int ad7124_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) { … } static int ad7124_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) { … } static int ad7124_reg_access(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval) { … } static IIO_CONST_ATTR(in_voltage_scale_available, "0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 0.000074505 0.000149011 0.000298023"); static struct attribute *ad7124_attributes[] = …; static const struct attribute_group ad7124_attrs_group = …; static int ad7124_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask) { … } static const struct iio_info ad7124_info = …; static int ad7124_soft_reset(struct ad7124_state *st) { … } static int ad7124_check_chip_id(struct ad7124_state *st) { … } static int ad7124_parse_channel_config(struct iio_dev *indio_dev, struct device *dev) { … } static int ad7124_setup(struct ad7124_state *st) { … } static void ad7124_reg_disable(void *r) { … } static int ad7124_probe(struct spi_device *spi) { … } static const struct of_device_id ad7124_of_match[] = …; MODULE_DEVICE_TABLE(of, ad7124_of_match); static const struct spi_device_id ad71124_ids[] = …; MODULE_DEVICE_TABLE(spi, ad71124_ids); static struct spi_driver ad71124_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…);
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