// SPDX-License-Identifier: GPL-2.0-only /* * Analog Devices AD9739a SPI DAC driver * * Copyright 2015-2024 Analog Devices Inc. */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/clk.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/errno.h> #include <linux/gpio/consumer.h> #include <linux/minmax.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/property.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <linux/units.h> #include <linux/iio/backend.h> #include <linux/iio/iio.h> #include <linux/iio/types.h> #define AD9739A_REG_MODE … #define AD9739A_RESET_MASK … #define AD9739A_REG_FSC_1 … #define AD9739A_REG_FSC_2 … #define AD9739A_FSC_MSB … #define AD9739A_REG_DEC_CNT … #define AD9739A_NORMAL_MODE … #define AD9739A_MIXED_MODE … #define AD9739A_DAC_DEC … #define AD9739A_REG_LVDS_REC_CNT1 … #define AD9739A_RCVR_LOOP_EN_MASK … #define AD9739A_REG_LVDS_REC_CNT4 … #define AD9739A_FINE_DEL_SKW_MASK … #define AD9739A_REG_LVDS_REC_STAT9 … #define AD9739A_RCVR_TRACK_AND_LOCK … #define AD9739A_REG_CROSS_CNT1 … #define AD9739A_REG_CROSS_CNT2 … #define AD9739A_REG_PHS_DET … #define AD9739A_REG_MU_DUTY … #define AD9739A_REG_MU_CNT1 … #define AD9739A_MU_EN_MASK … #define AD9739A_MU_GAIN_MASK … #define AD9739A_REG_MU_CNT2 … #define AD9739A_REG_MU_CNT3 … #define AD9739A_REG_MU_CNT4 … #define AD9739A_MU_CNT4_DEFAULT … #define AD9739A_REG_MU_STAT1 … #define AD9739A_MU_LOCK_MASK … #define AD9739A_REG_ANA_CNT_1 … #define AD9739A_REG_ID … #define AD9739A_ID … #define AD9739A_REG_IS_RESERVED(reg) … #define AD9739A_FSC_MIN … #define AD9739A_FSC_MAX … #define AD9739A_FSC_RANGE … #define AD9739A_MIN_DAC_CLK … #define AD9739A_MAX_DAC_CLK … #define AD9739A_DAC_CLK_RANGE … /* as recommended by the datasheet */ #define AD9739A_LOCK_N_TRIES … struct ad9739a_state { … }; static int ad9739a_oper_mode_get(struct iio_dev *indio_dev, const struct iio_chan_spec *chan) { … } static int ad9739a_oper_mode_set(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, u32 mode) { … } static int ad9739a_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int ad9739a_buffer_preenable(struct iio_dev *indio_dev) { … } static int ad9739a_buffer_postdisable(struct iio_dev *indio_dev) { … } static bool ad9739a_reg_accessible(struct device *dev, unsigned int reg) { … } static int ad9739a_reset(struct device *dev, const struct ad9739a_state *st) { … } /* * Recommended values (as per datasheet) for the dac clk common mode voltage * and Mu controller. Look at table 29. */ static const struct reg_sequence ad9739a_clk_mu_ctrl[] = …; static int ad9739a_init(struct device *dev, const struct ad9739a_state *st) { … } static const char * const ad9739a_modes_avail[] = …; static const struct iio_enum ad9739a_modes = …; static const struct iio_chan_spec_ext_info ad9739a_ext_info[] = …; /* * The reason for having two different channels is because we have, in reality, * two sources of data: * ALTVOLTAGE: It's a Continuous Wave that's internally generated by the * backend device. * VOLTAGE: It's the typical data we can have in a DAC device and the source * of it has nothing to do with the backend. The backend will only * forward it into our data interface to be sent out. */ static struct iio_chan_spec ad9739a_channels[] = …; static const struct iio_info ad9739a_info = …; static const struct iio_buffer_setup_ops ad9739a_buffer_setup_ops = …; static const struct regmap_config ad9739a_regmap_config = …; static int ad9739a_probe(struct spi_device *spi) { … } static const struct of_device_id ad9739a_of_match[] = …; MODULE_DEVICE_TABLE(of, ad9739a_of_match); static const struct spi_device_id ad9739a_id[] = …; MODULE_DEVICE_TABLE(spi, ad9739a_id); static struct spi_driver ad9739a_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_IMPORT_NS(…);
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