// SPDX-License-Identifier: GPL-2.0-only /* * AD5024, AD5025, AD5044, AD5045, AD5064, AD5064-1, AD5065, AD5625, AD5625R, * AD5627, AD5627R, AD5628, AD5629R, AD5645R, AD5647R, AD5648, AD5665, AD5665R, * AD5666, AD5667, AD5667R, AD5668, AD5669R, LTC2606, LTC2607, LTC2609, LTC2616, * LTC2617, LTC2619, LTC2626, LTC2627, LTC2629, LTC2631, LTC2633, LTC2635 * Digital to analog converters driver * * Copyright 2011 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/i2c.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/regulator/consumer.h> #include <asm/unaligned.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define AD5064_MAX_DAC_CHANNELS … #define AD5064_MAX_VREFS … #define AD5064_ADDR(x) … #define AD5064_CMD(x) … #define AD5064_ADDR_ALL_DAC … #define AD5064_CMD_WRITE_INPUT_N … #define AD5064_CMD_UPDATE_DAC_N … #define AD5064_CMD_WRITE_INPUT_N_UPDATE_ALL … #define AD5064_CMD_WRITE_INPUT_N_UPDATE_N … #define AD5064_CMD_POWERDOWN_DAC … #define AD5064_CMD_CLEAR … #define AD5064_CMD_LDAC_MASK … #define AD5064_CMD_RESET … #define AD5064_CMD_CONFIG … #define AD5064_CMD_RESET_V2 … #define AD5064_CMD_CONFIG_V2 … #define AD5064_CONFIG_DAISY_CHAIN_ENABLE … #define AD5064_CONFIG_INT_VREF_ENABLE … #define AD5064_LDAC_PWRDN_NONE … #define AD5064_LDAC_PWRDN_1K … #define AD5064_LDAC_PWRDN_100K … #define AD5064_LDAC_PWRDN_3STATE … /** * enum ad5064_regmap_type - Register layout variant * @AD5064_REGMAP_ADI: Old Analog Devices register map layout * @AD5064_REGMAP_ADI2: New Analog Devices register map layout * @AD5064_REGMAP_LTC: LTC register map layout */ enum ad5064_regmap_type { … }; /** * struct ad5064_chip_info - chip specific information * @shared_vref: whether the vref supply is shared between channels * @internal_vref: internal reference voltage. 0 if the chip has no * internal vref. * @channels: channel specification * @num_channels: number of channels * @regmap_type: register map layout variant */ struct ad5064_chip_info { … }; struct ad5064_state; ad5064_write_func; /** * struct ad5064_state - driver instance specific data * @dev: the device for this driver instance * @chip_info: chip model specific constants, available modes etc * @vref_reg: vref supply regulators * @pwr_down: whether channel is powered down * @pwr_down_mode: channel's current power down mode * @dac_cache: current DAC raw value (chip does not support readback) * @use_internal_vref: set to true if the internal reference voltage should be * used. * @write: register write callback * @lock: maintain consistency between cached and dev state * @data: i2c/spi transfer buffers */ struct ad5064_state { … }; enum ad5064_type { … }; static int ad5064_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val, unsigned int shift) { … } static int ad5064_sync_powerdown_mode(struct ad5064_state *st, const struct iio_chan_spec *chan) { … } static const char * const ad5064_powerdown_modes[] = …; static const char * const ltc2617_powerdown_modes[] = …; static int ad5064_get_powerdown_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { … } static int ad5064_set_powerdown_mode(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, unsigned int mode) { … } static const struct iio_enum ad5064_powerdown_mode_enum = …; static const struct iio_enum ltc2617_powerdown_mode_enum = …; static ssize_t ad5064_read_dac_powerdown(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, char *buf) { … } static ssize_t ad5064_write_dac_powerdown(struct iio_dev *indio_dev, uintptr_t private, const struct iio_chan_spec *chan, const char *buf, size_t len) { … } static int ad5064_get_vref(struct ad5064_state *st, struct iio_chan_spec const *chan) { … } static int ad5064_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { … } static int ad5064_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info ad5064_info = …; static const struct iio_chan_spec_ext_info ad5064_ext_info[] = …; static const struct iio_chan_spec_ext_info ltc2617_ext_info[] = …; #define AD5064_CHANNEL(chan, addr, bits, _shift, _ext_info) … #define DECLARE_AD5064_CHANNELS(name, bits, shift, ext_info) … #define DECLARE_AD5065_CHANNELS(name, bits, shift, ext_info) … static DECLARE_AD5064_CHANNELS(ad5024_channels, 12, 8, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ad5044_channels, 14, 6, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ad5064_channels, 16, 4, ad5064_ext_info); static DECLARE_AD5065_CHANNELS(ad5025_channels, 12, 8, ad5064_ext_info); static DECLARE_AD5065_CHANNELS(ad5045_channels, 14, 6, ad5064_ext_info); static DECLARE_AD5065_CHANNELS(ad5065_channels, 16, 4, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ad5629_channels, 12, 4, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ad5645_channels, 14, 2, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ad5669_channels, 16, 0, ad5064_ext_info); static DECLARE_AD5064_CHANNELS(ltc2607_channels, 16, 0, ltc2617_ext_info); static DECLARE_AD5064_CHANNELS(ltc2617_channels, 14, 2, ltc2617_ext_info); static DECLARE_AD5064_CHANNELS(ltc2627_channels, 12, 4, ltc2617_ext_info); #define ltc2631_12_channels … static DECLARE_AD5064_CHANNELS(ltc2631_10_channels, 10, 6, ltc2617_ext_info); static DECLARE_AD5064_CHANNELS(ltc2631_8_channels, 8, 8, ltc2617_ext_info); #define LTC2631_INFO(vref, pchannels, nchannels) … static const struct ad5064_chip_info ad5064_chip_info_tbl[] = …; static inline unsigned int ad5064_num_vref(struct ad5064_state *st) { … } static const char * const ad5064_vref_names[] = …; static const char *ad5064_vref_name(struct ad5064_state *st, unsigned int vref) { … } static int ad5064_set_config(struct ad5064_state *st, unsigned int val) { … } static int ad5064_request_vref(struct ad5064_state *st, struct device *dev) { … } static void ad5064_bulk_reg_disable(void *data) { … } static int ad5064_probe(struct device *dev, enum ad5064_type type, const char *name, ad5064_write_func write) { … } #if IS_ENABLED(CONFIG_SPI_MASTER) static int ad5064_spi_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { … } static int ad5064_spi_probe(struct spi_device *spi) { … } static const struct spi_device_id ad5064_spi_ids[] = …; MODULE_DEVICE_TABLE(spi, ad5064_spi_ids); static struct spi_driver ad5064_spi_driver = …; static int __init ad5064_spi_register_driver(void) { … } static void ad5064_spi_unregister_driver(void) { … } #else static inline int ad5064_spi_register_driver(void) { return 0; } static inline void ad5064_spi_unregister_driver(void) { } #endif #if IS_ENABLED(CONFIG_I2C) static int ad5064_i2c_write(struct ad5064_state *st, unsigned int cmd, unsigned int addr, unsigned int val) { … } static int ad5064_i2c_probe(struct i2c_client *i2c) { … } static const struct i2c_device_id ad5064_i2c_ids[] = …; MODULE_DEVICE_TABLE(i2c, ad5064_i2c_ids); static struct i2c_driver ad5064_i2c_driver = …; static int __init ad5064_i2c_register_driver(void) { … } static void __exit ad5064_i2c_unregister_driver(void) { … } #else static inline int ad5064_i2c_register_driver(void) { return 0; } static inline void ad5064_i2c_unregister_driver(void) { } #endif static int __init ad5064_init(void) { … } module_init(…) …; static void __exit ad5064_exit(void) { … } module_exit(ad5064_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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