// SPDX-License-Identifier: GPL-2.0 /* * AD9833/AD9834/AD9837/AD9838 SPI DDS driver * * Copyright 2010-2011 Analog Devices Inc. */ #include <linux/clk.h> #include <linux/interrupt.h> #include <linux/workqueue.h> #include <linux/device.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/sysfs.h> #include <linux/list.h> #include <linux/spi/spi.h> #include <linux/regulator/consumer.h> #include <linux/err.h> #include <linux/module.h> #include <asm/div64.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include "dds.h" #include "ad9834.h" /* Registers */ #define AD9834_REG_CMD … #define AD9834_REG_FREQ0 … #define AD9834_REG_FREQ1 … #define AD9834_REG_PHASE0 … #define AD9834_REG_PHASE1 … /* Command Control Bits */ #define AD9834_B28 … #define AD9834_HLB … #define AD9834_FSEL … #define AD9834_PSEL … #define AD9834_PIN_SW … #define AD9834_RESET … #define AD9834_SLEEP1 … #define AD9834_SLEEP12 … #define AD9834_OPBITEN … #define AD9834_SIGN_PIB … #define AD9834_DIV2 … #define AD9834_MODE … #define AD9834_FREQ_BITS … #define AD9834_PHASE_BITS … #define RES_MASK(bits) … /** * struct ad9834_state - driver instance specific data * @spi: spi_device * @mclk: external master clock * @control: cached control word * @devid: device id * @xfer: default spi transfer * @msg: default spi message * @freq_xfer: tuning word spi transfer * @freq_msg: tuning word spi message * @lock: protect sensor state * @data: spi transmit buffer * @freq_data: tuning word spi transmit buffer */ struct ad9834_state { … }; /* * ad9834_supported_device_ids: */ enum ad9834_supported_device_ids { … }; static unsigned int ad9834_calc_freqreg(unsigned long mclk, unsigned long fout) { … } static int ad9834_write_frequency(struct ad9834_state *st, unsigned long addr, unsigned long fout) { … } static int ad9834_write_phase(struct ad9834_state *st, unsigned long addr, unsigned long phase) { … } static ssize_t ad9834_write(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t ad9834_store_wavetype(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { … } static ssize_t ad9834_show_out0_wavetype_available(struct device *dev, struct device_attribute *attr, char *buf) { … } static IIO_DEVICE_ATTR(out_altvoltage0_out0_wavetype_available, 0444, ad9834_show_out0_wavetype_available, NULL, 0); static ssize_t ad9834_show_out1_wavetype_available(struct device *dev, struct device_attribute *attr, char *buf) { … } static IIO_DEVICE_ATTR(out_altvoltage0_out1_wavetype_available, 0444, ad9834_show_out1_wavetype_available, NULL, 0); /* * see dds.h for further information */ static IIO_DEV_ATTR_FREQ(0, 0, 0200, NULL, ad9834_write, AD9834_REG_FREQ0); static IIO_DEV_ATTR_FREQ(0, 1, 0200, NULL, ad9834_write, AD9834_REG_FREQ1); static IIO_DEV_ATTR_FREQSYMBOL(0, 0200, NULL, ad9834_write, AD9834_FSEL); static IIO_CONST_ATTR_FREQ_SCALE(0, "1"); /* 1Hz */ static IIO_DEV_ATTR_PHASE(0, 0, 0200, NULL, ad9834_write, AD9834_REG_PHASE0); static IIO_DEV_ATTR_PHASE(0, 1, 0200, NULL, ad9834_write, AD9834_REG_PHASE1); static IIO_DEV_ATTR_PHASESYMBOL(0, 0200, NULL, ad9834_write, AD9834_PSEL); static IIO_CONST_ATTR_PHASE_SCALE(0, "0.0015339808"); /* 2PI/2^12 rad*/ static IIO_DEV_ATTR_PINCONTROL_EN(0, 0200, NULL, ad9834_write, AD9834_PIN_SW); static IIO_DEV_ATTR_OUT_ENABLE(0, 0200, NULL, ad9834_write, AD9834_RESET); static IIO_DEV_ATTR_OUTY_ENABLE(0, 1, 0200, NULL, ad9834_write, AD9834_OPBITEN); static IIO_DEV_ATTR_OUT_WAVETYPE(0, 0, ad9834_store_wavetype, 0); static IIO_DEV_ATTR_OUT_WAVETYPE(0, 1, ad9834_store_wavetype, 1); static struct attribute *ad9834_attributes[] = …; static struct attribute *ad9833_attributes[] = …; static const struct attribute_group ad9834_attribute_group = …; static const struct attribute_group ad9833_attribute_group = …; static const struct iio_info ad9834_info = …; static const struct iio_info ad9833_info = …; static void ad9834_disable_reg(void *data) { … } static int ad9834_probe(struct spi_device *spi) { … } static const struct spi_device_id ad9834_id[] = …; MODULE_DEVICE_TABLE(spi, ad9834_id); static const struct of_device_id ad9834_of_match[] = …; MODULE_DEVICE_TABLE(of, ad9834_of_match); static struct spi_driver ad9834_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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