// SPDX-License-Identifier: GPL-2.0-only /* * MAX11410 SPI ADC driver * * Copyright 2022 Analog Devices Inc. */ #include <linux/bitfield.h> #include <linux/delay.h> #include <linux/device.h> #include <linux/err.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/spi/spi.h> #include <linux/unaligned.h> #include <linux/iio/buffer.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #define MAX11410_REG_CONV_START … #define MAX11410_CONV_TYPE_SINGLE … #define MAX11410_CONV_TYPE_CONTINUOUS … #define MAX11410_REG_CAL_START … #define MAX11410_CAL_START_SELF … #define MAX11410_CAL_START_PGA … #define MAX11410_REG_GPIO_CTRL(ch) … #define MAX11410_GPIO_INTRB … #define MAX11410_REG_FILTER … #define MAX11410_FILTER_RATE_MASK … #define MAX11410_FILTER_RATE_MAX … #define MAX11410_FILTER_LINEF_MASK … #define MAX11410_FILTER_50HZ … #define MAX11410_FILTER_60HZ … #define MAX11410_REG_CTRL … #define MAX11410_CTRL_REFSEL_MASK … #define MAX11410_CTRL_VREFN_BUF_BIT … #define MAX11410_CTRL_VREFP_BUF_BIT … #define MAX11410_CTRL_FORMAT_BIT … #define MAX11410_CTRL_UNIPOLAR_BIT … #define MAX11410_REG_MUX_CTRL0 … #define MAX11410_REG_PGA … #define MAX11410_PGA_GAIN_MASK … #define MAX11410_PGA_SIG_PATH_MASK … #define MAX11410_PGA_SIG_PATH_BUFFERED … #define MAX11410_PGA_SIG_PATH_BYPASS … #define MAX11410_PGA_SIG_PATH_PGA … #define MAX11410_REG_DATA0 … #define MAX11410_REG_STATUS … #define MAX11410_STATUS_CONV_READY_BIT … #define MAX11410_STATUS_CAL_READY_BIT … #define MAX11410_REFSEL_AVDD_AGND … #define MAX11410_REFSEL_MAX … #define MAX11410_SIG_PATH_MAX … #define MAX11410_CHANNEL_INDEX_MAX … #define MAX11410_AINP_AVDD … #define MAX11410_AINN_GND … #define MAX11410_CONVERSION_TIMEOUT_MS … #define MAX11410_CALIB_TIMEOUT_MS … #define MAX11410_SCALE_AVAIL_SIZE … enum max11410_filter { … }; static const u8 max11410_sampling_len[] = …; static const int max11410_sampling_rates[4][10][2] = …; struct max11410_channel_config { … }; struct max11410_state { … }; static const struct iio_chan_spec chanspec_template = …; static unsigned int max11410_reg_size(unsigned int reg) { … } static int max11410_write_reg(struct max11410_state *st, unsigned int reg, unsigned int val) { … } static int max11410_read_reg(struct max11410_state *st, unsigned int reg, int *val) { … } static struct regulator *max11410_get_vrefp(struct max11410_state *st, u8 refsel) { … } static struct regulator *max11410_get_vrefn(struct max11410_state *st, u8 refsel) { … } static const struct regmap_config regmap_config = …; static ssize_t max11410_notch_en_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t max11410_notch_en_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static ssize_t in_voltage_filter2_notch_center_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static IIO_CONST_ATTR(in_voltage_filter0_notch_center, "50"); static IIO_CONST_ATTR(in_voltage_filter1_notch_center, "60"); static IIO_DEVICE_ATTR_RO(in_voltage_filter2_notch_center, 2); static IIO_DEVICE_ATTR(in_voltage_filter0_notch_en, 0644, max11410_notch_en_show, max11410_notch_en_store, 0); static IIO_DEVICE_ATTR(in_voltage_filter1_notch_en, 0644, max11410_notch_en_show, max11410_notch_en_store, 1); static IIO_DEVICE_ATTR(in_voltage_filter2_notch_en, 0644, max11410_notch_en_show, max11410_notch_en_store, 2); static struct attribute *max11410_attributes[] = …; static const struct attribute_group max11410_attribute_group = …; static int max11410_set_input_mux(struct max11410_state *st, u8 ainp, u8 ainn) { … } static int max11410_configure_channel(struct max11410_state *st, struct iio_chan_spec const *chan) { … } static int max11410_sample(struct max11410_state *st, int *sample_raw, struct iio_chan_spec const *chan) { … } static int max11410_get_scale(struct max11410_state *state, struct max11410_channel_config cfg) { … } static int max11410_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long info) { … } static int max11410_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int max11410_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long info) { … } static const struct iio_info max11410_info = …; static irqreturn_t max11410_trigger_handler(int irq, void *p) { … } static int max11410_buffer_postenable(struct iio_dev *indio_dev) { … } static int max11410_buffer_predisable(struct iio_dev *indio_dev) { … } static const struct iio_buffer_setup_ops max11410_buffer_ops = …; static const struct iio_trigger_ops max11410_trigger_ops = …; static irqreturn_t max11410_interrupt(int irq, void *dev_id) { struct iio_dev *indio_dev = dev_id; struct max11410_state *st = iio_priv(indio_dev); if (iio_buffer_enabled(indio_dev)) iio_trigger_poll_nested(st->trig); else complete(&st->completion); return IRQ_HANDLED; }; static int max11410_parse_channels(struct max11410_state *st, struct iio_dev *indio_dev) { … } static void max11410_disable_reg(void *reg) { … } static int max11410_init_vref(struct device *dev, struct regulator **vref, const char *id) { … } static int max11410_calibrate(struct max11410_state *st, u32 cal_type) { … } static int max11410_self_calibrate(struct max11410_state *st) { … } static int max11410_probe(struct spi_device *spi) { … } static const struct of_device_id max11410_spi_of_id[] = …; MODULE_DEVICE_TABLE(of, max11410_spi_of_id); static const struct spi_device_id max11410_id[] = …; MODULE_DEVICE_TABLE(spi, max11410_id); static struct spi_driver max11410_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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