// SPDX-License-Identifier: GPL-2.0-only /* * AD7785/AD7792/AD7793/AD7794/AD7795 SPI ADC driver * * Copyright 2011-2012 Analog Devices Inc. */ #include <linux/interrupt.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/spi/spi.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/sched.h> #include <linux/delay.h> #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/buffer.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #include <linux/iio/adc/ad_sigma_delta.h> #include <linux/platform_data/ad7793.h> /* Registers */ #define AD7793_REG_COMM … #define AD7793_REG_STAT … #define AD7793_REG_MODE … #define AD7793_REG_CONF … #define AD7793_REG_DATA … #define AD7793_REG_ID … #define AD7793_REG_IO … #define AD7793_REG_OFFSET … #define AD7793_REG_FULLSALE … /* Communications Register Bit Designations (AD7793_REG_COMM) */ #define AD7793_COMM_WEN … #define AD7793_COMM_WRITE … #define AD7793_COMM_READ … #define AD7793_COMM_ADDR(x) … #define AD7793_COMM_CREAD … /* Status Register Bit Designations (AD7793_REG_STAT) */ #define AD7793_STAT_RDY … #define AD7793_STAT_ERR … #define AD7793_STAT_CH3 … #define AD7793_STAT_CH2 … #define AD7793_STAT_CH1 … /* Mode Register Bit Designations (AD7793_REG_MODE) */ #define AD7793_MODE_SEL(x) … #define AD7793_MODE_SEL_MASK … #define AD7793_MODE_CLKSRC(x) … #define AD7793_MODE_RATE(x) … #define AD7793_MODE_CONT … #define AD7793_MODE_SINGLE … #define AD7793_MODE_IDLE … #define AD7793_MODE_PWRDN … #define AD7793_MODE_CAL_INT_ZERO … #define AD7793_MODE_CAL_INT_FULL … #define AD7793_MODE_CAL_SYS_ZERO … #define AD7793_MODE_CAL_SYS_FULL … #define AD7793_CLK_INT … #define AD7793_CLK_INT_CO … #define AD7793_CLK_EXT … #define AD7793_CLK_EXT_DIV2 … /* Configuration Register Bit Designations (AD7793_REG_CONF) */ #define AD7793_CONF_VBIAS(x) … #define AD7793_CONF_BO_EN … #define AD7793_CONF_UNIPOLAR … #define AD7793_CONF_BOOST … #define AD7793_CONF_GAIN(x) … #define AD7793_CONF_REFSEL(x) … #define AD7793_CONF_BUF … #define AD7793_CONF_CHAN(x) … #define AD7793_CONF_CHAN_MASK … #define AD7793_CH_AIN1P_AIN1M … #define AD7793_CH_AIN2P_AIN2M … #define AD7793_CH_AIN3P_AIN3M … #define AD7793_CH_AIN1M_AIN1M … #define AD7793_CH_TEMP … #define AD7793_CH_AVDD_MONITOR … #define AD7795_CH_AIN4P_AIN4M … #define AD7795_CH_AIN5P_AIN5M … #define AD7795_CH_AIN6P_AIN6M … #define AD7795_CH_AIN1M_AIN1M … /* ID Register Bit Designations (AD7793_REG_ID) */ #define AD7785_ID … #define AD7792_ID … #define AD7793_ID … #define AD7794_ID … #define AD7795_ID … #define AD7796_ID … #define AD7797_ID … #define AD7798_ID … #define AD7799_ID … #define AD7793_ID_MASK … /* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */ #define AD7793_IO_IEXC1_IOUT1_IEXC2_IOUT2 … #define AD7793_IO_IEXC1_IOUT2_IEXC2_IOUT1 … #define AD7793_IO_IEXC1_IEXC2_IOUT1 … #define AD7793_IO_IEXC1_IEXC2_IOUT2 … #define AD7793_IO_IXCEN_10uA … #define AD7793_IO_IXCEN_210uA … #define AD7793_IO_IXCEN_1mA … /* NOTE: * The AD7792/AD7793 features a dual use data out ready DOUT/RDY output. * In order to avoid contentions on the SPI bus, it's therefore necessary * to use spi bus locking. * * The DOUT/RDY output must also be wired to an interrupt capable GPIO. */ #define AD7793_FLAG_HAS_CLKSEL … #define AD7793_FLAG_HAS_REFSEL … #define AD7793_FLAG_HAS_VBIAS … #define AD7793_HAS_EXITATION_CURRENT … #define AD7793_FLAG_HAS_GAIN … #define AD7793_FLAG_HAS_BUFFER … struct ad7793_chip_info { … }; struct ad7793_state { … }; enum ad7793_supported_device_ids { … }; static struct ad7793_state *ad_sigma_delta_to_ad7793(struct ad_sigma_delta *sd) { … } static int ad7793_set_channel(struct ad_sigma_delta *sd, unsigned int channel) { … } static int ad7793_set_mode(struct ad_sigma_delta *sd, enum ad_sigma_delta_mode mode) { … } static const struct ad_sigma_delta_info ad7793_sigma_delta_info = …; static const struct ad_sd_calib_data ad7793_calib_arr[6] = …; static int ad7793_calibrate_all(struct ad7793_state *st) { … } static int ad7793_check_platform_data(struct ad7793_state *st, const struct ad7793_platform_data *pdata) { … } static int ad7793_setup(struct iio_dev *indio_dev, const struct ad7793_platform_data *pdata, unsigned int vref_mv) { … } static const u16 ad7793_sample_freq_avail[16] = …; static const u16 ad7797_sample_freq_avail[16] = …; static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( "470 242 123 62 50 39 33 19 17 16 12 10 8 6 4"); static IIO_CONST_ATTR_NAMED(sampling_frequency_available_ad7797, sampling_frequency_available, "123 62 50 33 17 16 12 10 8 6 4"); static int ad7793_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static struct attribute *ad7793_attributes[] = …; static const struct attribute_group ad7793_attribute_group = …; static struct attribute *ad7797_attributes[] = …; static const struct attribute_group ad7797_attribute_group = …; static int ad7793_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { … } static int ad7793_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int ad7793_write_raw_get_fmt(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask) { … } static const struct iio_info ad7793_info = …; static const struct iio_info ad7797_info = …; #define __AD7793_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ _storagebits, _shift, _extend_name, _type, _mask_type_av, _mask_all) … #define AD7793_DIFF_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ _storagebits, _shift) … #define AD7793_SHORTED_CHANNEL(_si, _channel, _address, _bits, \ _storagebits, _shift) … #define AD7793_TEMP_CHANNEL(_si, _address, _bits, _storagebits, _shift) … #define AD7793_SUPPLY_CHANNEL(_si, _channel, _address, _bits, _storagebits, \ _shift) … #define AD7797_DIFF_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ _storagebits, _shift) … #define AD7797_SHORTED_CHANNEL(_si, _channel, _address, _bits, \ _storagebits, _shift) … #define DECLARE_AD7793_CHANNELS(_name, _b, _sb, _s) … #define DECLARE_AD7795_CHANNELS(_name, _b, _sb) … #define DECLARE_AD7797_CHANNELS(_name, _b, _sb) … #define DECLARE_AD7799_CHANNELS(_name, _b, _sb) … static DECLARE_AD7793_CHANNELS(ad7785, 20, 32, 4); static DECLARE_AD7793_CHANNELS(ad7792, 16, 32, 0); static DECLARE_AD7793_CHANNELS(ad7793, 24, 32, 0); static DECLARE_AD7795_CHANNELS(ad7794, 16, 32); static DECLARE_AD7795_CHANNELS(ad7795, 24, 32); static DECLARE_AD7797_CHANNELS(ad7796, 16, 16); static DECLARE_AD7797_CHANNELS(ad7797, 24, 32); static DECLARE_AD7799_CHANNELS(ad7798, 16, 16); static DECLARE_AD7799_CHANNELS(ad7799, 24, 32); static const struct ad7793_chip_info ad7793_chip_info_tbl[] = …; static int ad7793_probe(struct spi_device *spi) { … } static const struct spi_device_id ad7793_id[] = …; MODULE_DEVICE_TABLE(spi, ad7793_id); static struct spi_driver ad7793_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…);
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