// SPDX-License-Identifier: GPL-2.0-only /* * AD5415, AD5426, AD5429, AD5432, AD5439, AD5443, AD5449 Digital to Analog * Converter driver. * * Copyright 2012 Analog Devices Inc. * Author: Lars-Peter Clausen <[email protected]> */ #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/regulator/consumer.h> #include <linux/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define AD5449_MAX_CHANNELS … #define AD5449_MAX_VREFS … #define AD5449_CMD_NOOP … #define AD5449_CMD_LOAD_AND_UPDATE(x) … #define AD5449_CMD_READ(x) … #define AD5449_CMD_LOAD(x) … #define AD5449_CMD_CTRL … #define AD5449_CTRL_SDO_OFFSET … #define AD5449_CTRL_DAISY_CHAIN … #define AD5449_CTRL_HCLR_TO_MIDSCALE … #define AD5449_CTRL_SAMPLE_RISING … /** * struct ad5449_chip_info - chip specific information * @channels: Channel specification * @num_channels: Number of channels * @has_ctrl: Chip has a control register */ struct ad5449_chip_info { … }; /** * struct ad5449 - driver instance specific data * @spi: the SPI device for this driver instance * @chip_info: chip model specific constants, available modes etc * @vref_reg: vref supply regulators * @has_sdo: whether the SDO line is connected * @dac_cache: Cache for the DAC values * @data: spi transfer buffers * @lock: lock to protect the data buffer during SPI ops */ struct ad5449 { … }; enum ad5449_type { … }; static int ad5449_write(struct iio_dev *indio_dev, unsigned int addr, unsigned int val) { … } static int ad5449_read(struct iio_dev *indio_dev, unsigned int addr, unsigned int *val) { … } static int ad5449_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) { … } static int ad5449_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) { … } static const struct iio_info ad5449_info = …; #define AD5449_CHANNEL(chan, bits) … #define DECLARE_AD5449_CHANNELS(name, bits) … static DECLARE_AD5449_CHANNELS(ad5429_channels, 8); static DECLARE_AD5449_CHANNELS(ad5439_channels, 10); static DECLARE_AD5449_CHANNELS(ad5449_channels, 12); static const struct ad5449_chip_info ad5449_chip_info[] = …; static const char *ad5449_vref_name(struct ad5449 *st, int n) { … } static int ad5449_spi_probe(struct spi_device *spi) { … } static void ad5449_spi_remove(struct spi_device *spi) { … } static const struct spi_device_id ad5449_spi_ids[] = …; MODULE_DEVICE_TABLE(spi, ad5449_spi_ids); static struct spi_driver ad5449_spi_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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