// SPDX-License-Identifier: GPL-2.0 /* * AD5933 AD5934 Impedance Converter, Network Analyzer * * Copyright 2011 Analog Devices Inc. */ #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/regulator/consumer.h> #include <linux/sysfs.h> #include <linux/types.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/kfifo_buf.h> #include <linux/iio/sysfs.h> /* AD5933/AD5934 Registers */ #define AD5933_REG_CONTROL_HB … #define AD5933_REG_CONTROL_LB … #define AD5933_REG_FREQ_START … #define AD5933_REG_FREQ_INC … #define AD5933_REG_INC_NUM … #define AD5933_REG_SETTLING_CYCLES … #define AD5933_REG_STATUS … #define AD5933_REG_TEMP_DATA … #define AD5933_REG_REAL_DATA … #define AD5933_REG_IMAG_DATA … /* AD5933_REG_CONTROL_HB Bits */ #define AD5933_CTRL_INIT_START_FREQ … #define AD5933_CTRL_START_SWEEP … #define AD5933_CTRL_INC_FREQ … #define AD5933_CTRL_REPEAT_FREQ … #define AD5933_CTRL_MEASURE_TEMP … #define AD5933_CTRL_POWER_DOWN … #define AD5933_CTRL_STANDBY … #define AD5933_CTRL_RANGE_2000mVpp … #define AD5933_CTRL_RANGE_200mVpp … #define AD5933_CTRL_RANGE_400mVpp … #define AD5933_CTRL_RANGE_1000mVpp … #define AD5933_CTRL_RANGE(x) … #define AD5933_CTRL_PGA_GAIN_1 … #define AD5933_CTRL_PGA_GAIN_5 … /* AD5933_REG_CONTROL_LB Bits */ #define AD5933_CTRL_RESET … #define AD5933_CTRL_INT_SYSCLK … #define AD5933_CTRL_EXT_SYSCLK … /* AD5933_REG_STATUS Bits */ #define AD5933_STAT_TEMP_VALID … #define AD5933_STAT_DATA_VALID … #define AD5933_STAT_SWEEP_DONE … /* I2C Block Commands */ #define AD5933_I2C_BLOCK_WRITE … #define AD5933_I2C_BLOCK_READ … #define AD5933_I2C_ADDR_POINTER … /* Device Specs */ #define AD5933_INT_OSC_FREQ_Hz … #define AD5933_MAX_OUTPUT_FREQ_Hz … #define AD5933_MAX_RETRIES … #define AD5933_OUT_RANGE … #define AD5933_OUT_RANGE_AVAIL … #define AD5933_OUT_SETTLING_CYCLES … #define AD5933_IN_PGA_GAIN … #define AD5933_IN_PGA_GAIN_AVAIL … #define AD5933_FREQ_POINTS … #define AD5933_POLL_TIME_ms … #define AD5933_INIT_EXCITATION_TIME_ms … struct ad5933_state { … }; #define AD5933_CHANNEL(_type, _extend_name, _info_mask_separate, _address, \ _scan_index, _realbits) … static const struct iio_chan_spec ad5933_channels[] = …; static int ad5933_i2c_write(struct i2c_client *client, u8 reg, u8 len, u8 *data) { … } static int ad5933_i2c_read(struct i2c_client *client, u8 reg, u8 len, u8 *data) { … } static int ad5933_cmd(struct ad5933_state *st, unsigned char cmd) { … } static int ad5933_reset(struct ad5933_state *st) { … } static int ad5933_wait_busy(struct ad5933_state *st, unsigned char event) { … } static int ad5933_set_freq(struct ad5933_state *st, unsigned int reg, unsigned long freq) { … } static int ad5933_setup(struct ad5933_state *st) { … } static void ad5933_calc_out_ranges(struct ad5933_state *st) { … } /* * handles: AD5933_REG_FREQ_START and AD5933_REG_FREQ_INC */ static ssize_t ad5933_show_frequency(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad5933_store_frequency(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static IIO_DEVICE_ATTR(out_altvoltage0_frequency_start, 0644, ad5933_show_frequency, ad5933_store_frequency, AD5933_REG_FREQ_START); static IIO_DEVICE_ATTR(out_altvoltage0_frequency_increment, 0644, ad5933_show_frequency, ad5933_store_frequency, AD5933_REG_FREQ_INC); static ssize_t ad5933_show(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ad5933_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static IIO_DEVICE_ATTR(out_altvoltage0_raw, 0644, ad5933_show, ad5933_store, AD5933_OUT_RANGE); static IIO_DEVICE_ATTR(out_altvoltage0_scale_available, 0444, ad5933_show, NULL, AD5933_OUT_RANGE_AVAIL); static IIO_DEVICE_ATTR(in_voltage0_scale, 0644, ad5933_show, ad5933_store, AD5933_IN_PGA_GAIN); static IIO_DEVICE_ATTR(in_voltage0_scale_available, 0444, ad5933_show, NULL, AD5933_IN_PGA_GAIN_AVAIL); static IIO_DEVICE_ATTR(out_altvoltage0_frequency_points, 0644, ad5933_show, ad5933_store, AD5933_FREQ_POINTS); static IIO_DEVICE_ATTR(out_altvoltage0_settling_cycles, 0644, ad5933_show, ad5933_store, AD5933_OUT_SETTLING_CYCLES); /* * note: * ideally we would handle the scale attributes via the iio_info * (read|write)_raw methods, however this part is a untypical since we * don't create dedicated sysfs channel attributes for out0 and in0. */ static struct attribute *ad5933_attributes[] = …; static const struct attribute_group ad5933_attribute_group = …; static int ad5933_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { … } static const struct iio_info ad5933_info = …; static int ad5933_ring_preenable(struct iio_dev *indio_dev) { … } static int ad5933_ring_postenable(struct iio_dev *indio_dev) { … } static int ad5933_ring_postdisable(struct iio_dev *indio_dev) { … } static const struct iio_buffer_setup_ops ad5933_ring_setup_ops = …; static void ad5933_work(struct work_struct *work) { … } static int ad5933_probe(struct i2c_client *client) { … } static const struct i2c_device_id ad5933_id[] = …; MODULE_DEVICE_TABLE(i2c, ad5933_id); static const struct of_device_id ad5933_of_match[] = …; MODULE_DEVICE_TABLE(of, ad5933_of_match); static struct i2c_driver ad5933_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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