// SPDX-License-Identifier: GPL-2.0-only /* * AD5755, AD5755-1, AD5757, AD5735, AD5737 Digital to analog converters driver * * Copyright 2012 Analog Devices Inc. */ #include <linux/device.h> #include <linux/err.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/spi/spi.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/delay.h> #include <linux/property.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define AD5755_NUM_CHANNELS … #define AD5755_ADDR(x) … #define AD5755_WRITE_REG_DATA(chan) … #define AD5755_WRITE_REG_GAIN(chan) … #define AD5755_WRITE_REG_OFFSET(chan) … #define AD5755_WRITE_REG_CTRL(chan) … #define AD5755_READ_REG_DATA(chan) … #define AD5755_READ_REG_CTRL(chan) … #define AD5755_READ_REG_GAIN(chan) … #define AD5755_READ_REG_OFFSET(chan) … #define AD5755_READ_REG_CLEAR(chan) … #define AD5755_READ_REG_SLEW(chan) … #define AD5755_READ_REG_STATUS … #define AD5755_READ_REG_MAIN … #define AD5755_READ_REG_DC_DC … #define AD5755_CTRL_REG_SLEW … #define AD5755_CTRL_REG_MAIN … #define AD5755_CTRL_REG_DAC … #define AD5755_CTRL_REG_DC_DC … #define AD5755_CTRL_REG_SW … #define AD5755_READ_FLAG … #define AD5755_NOOP … #define AD5755_DAC_INT_EN … #define AD5755_DAC_CLR_EN … #define AD5755_DAC_OUT_EN … #define AD5755_DAC_INT_CURRENT_SENSE_RESISTOR … #define AD5755_DAC_DC_DC_EN … #define AD5755_DAC_VOLTAGE_OVERRANGE_EN … #define AD5755_DC_DC_MAXV … #define AD5755_DC_DC_FREQ_SHIFT … #define AD5755_DC_DC_PHASE_SHIFT … #define AD5755_EXT_DC_DC_COMP_RES … #define AD5755_SLEW_STEP_SIZE_SHIFT … #define AD5755_SLEW_RATE_SHIFT … #define AD5755_SLEW_ENABLE … enum ad5755_mode { … }; enum ad5755_dc_dc_phase { … }; enum ad5755_dc_dc_freq { … }; enum ad5755_dc_dc_maxv { … }; enum ad5755_slew_rate { … }; enum ad5755_slew_step_size { … }; /** * struct ad5755_platform_data - AD5755 DAC driver platform data * @ext_dc_dc_compenstation_resistor: Whether an external DC-DC converter * compensation register is used. * @dc_dc_phase: DC-DC converter phase. * @dc_dc_freq: DC-DC converter frequency. * @dc_dc_maxv: DC-DC maximum allowed boost voltage. * @dac: Per DAC instance parameters. * @dac.mode: The mode to be used for the DAC output. * @dac.ext_current_sense_resistor: Whether an external current sense resistor * is used. * @dac.enable_voltage_overrange: Whether to enable 20% voltage output overrange. * @dac.slew.enable: Whether to enable digital slew. * @dac.slew.rate: Slew rate of the digital slew. * @dac.slew.step_size: Slew step size of the digital slew. **/ struct ad5755_platform_data { … }; /** * struct ad5755_chip_info - chip specific information * @channel_template: channel specification * @calib_shift: shift for the calibration data registers * @has_voltage_out: whether the chip has voltage outputs */ struct ad5755_chip_info { … }; /** * struct ad5755_state - driver instance specific data * @spi: spi device the driver is attached to * @chip_info: chip model specific constants, available modes etc * @pwr_down: bitmask which contains hether a channel is powered down or not * @ctrl: software shadow of the channel ctrl registers * @channels: iio channel spec for the device * @lock: lock to protect the data buffer during SPI ops * @data: spi transfer buffers */ struct ad5755_state { … }; enum ad5755_type { … }; static const int ad5755_dcdc_freq_table[][2] = …; static const int ad5755_dcdc_maxv_table[][2] = …; static const int ad5755_slew_rate_table[][2] = …; static const int ad5755_slew_step_table[][2] = …; static int ad5755_write_unlocked(struct iio_dev *indio_dev, unsigned int reg, unsigned int val) { … } static int ad5755_write_ctrl_unlocked(struct iio_dev *indio_dev, unsigned int channel, unsigned int reg, unsigned int val) { … } static int ad5755_write(struct iio_dev *indio_dev, unsigned int reg, unsigned int val) { … } static int ad5755_write_ctrl(struct iio_dev *indio_dev, unsigned int channel, unsigned int reg, unsigned int val) { … } static int ad5755_read(struct iio_dev *indio_dev, unsigned int addr) { … } static int ad5755_update_dac_ctrl(struct iio_dev *indio_dev, unsigned int channel, unsigned int set, unsigned int clr) { … } static int ad5755_set_channel_pwr_down(struct iio_dev *indio_dev, unsigned int channel, bool pwr_down) { … } static const int ad5755_min_max_table[][2] = …; static void ad5755_get_min_max(struct ad5755_state *st, struct iio_chan_spec const *chan, int *min, int *max) { … } static inline int ad5755_get_offset(struct ad5755_state *st, struct iio_chan_spec const *chan) { … } static int ad5755_chan_reg_info(struct ad5755_state *st, struct iio_chan_spec const *chan, long info, bool write, unsigned int *reg, unsigned int *shift, unsigned int *offset) { … } static int ad5755_read_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int *val, int *val2, long info) { … } static int ad5755_write_raw(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, int val, int val2, long info) { … } static ssize_t ad5755_read_powerdown(struct iio_dev *indio_dev, uintptr_t priv, const struct iio_chan_spec *chan, char *buf) { … } static ssize_t ad5755_write_powerdown(struct iio_dev *indio_dev, uintptr_t priv, struct iio_chan_spec const *chan, const char *buf, size_t len) { … } static const struct iio_info ad5755_info = …; static const struct iio_chan_spec_ext_info ad5755_ext_info[] = …; #define AD5755_CHANNEL(_bits) … static const struct ad5755_chip_info ad5755_chip_info_tbl[] = …; static bool ad5755_is_valid_mode(struct ad5755_state *st, enum ad5755_mode mode) { … } static int ad5755_setup_pdata(struct iio_dev *indio_dev, const struct ad5755_platform_data *pdata) { … } static bool ad5755_is_voltage_mode(enum ad5755_mode mode) { … } static int ad5755_init_channels(struct iio_dev *indio_dev, const struct ad5755_platform_data *pdata) { … } #define AD5755_DEFAULT_DAC_PDATA … static const struct ad5755_platform_data ad5755_default_pdata = …; static struct ad5755_platform_data *ad5755_parse_fw(struct device *dev) { … } static int ad5755_probe(struct spi_device *spi) { … } static const struct spi_device_id ad5755_id[] = …; MODULE_DEVICE_TABLE(spi, ad5755_id); static const struct of_device_id ad5755_of_match[] = …; MODULE_DEVICE_TABLE(of, ad5755_of_match); static struct spi_driver ad5755_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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