// SPDX-License-Identifier: GPL-2.0 /* * Texas Instruments ADS7950 SPI ADC driver * * Copyright 2016 David Lechner <[email protected]> * * Based on iio/ad7923.c: * Copyright 2011 Analog Devices Inc * Copyright 2012 CS Systemes d'Information * * And also on hwmon/ads79xx.c * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/ * Nishanth Menon */ #include <linux/acpi.h> #include <linux/bitops.h> #include <linux/device.h> #include <linux/err.h> #include <linux/gpio/driver.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/regulator/consumer.h> #include <linux/slab.h> #include <linux/spi/spi.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> /* * In case of ACPI, we use the 5000 mV as default for the reference pin. * Device tree users encode that via the vref-supply regulator. */ #define TI_ADS7950_VA_MV_ACPI_DEFAULT … #define TI_ADS7950_CR_GPIO … #define TI_ADS7950_CR_MANUAL … #define TI_ADS7950_CR_WRITE … #define TI_ADS7950_CR_CHAN(ch) … #define TI_ADS7950_CR_RANGE_5V … #define TI_ADS7950_CR_GPIO_DATA … #define TI_ADS7950_MAX_CHAN … #define TI_ADS7950_NUM_GPIOS … #define TI_ADS7950_TIMESTAMP_SIZE … /* val = value, dec = left shift, bits = number of bits of the mask */ #define TI_ADS7950_EXTRACT(val, dec, bits) … #define TI_ADS7950_MAN_CMD(cmd) … #define TI_ADS7950_GPIO_CMD(cmd) … /* Manual mode configuration */ #define TI_ADS7950_MAN_CMD_SETTINGS(st) … /* GPIO mode configuration */ #define TI_ADS7950_GPIO_CMD_SETTINGS(st) … struct ti_ads7950_state { … }; struct ti_ads7950_chip_info { … }; enum ti_ads7950_id { … }; #define TI_ADS7950_V_CHAN(index, bits) … #define DECLARE_TI_ADS7950_4_CHANNELS(name, bits) … #define DECLARE_TI_ADS7950_8_CHANNELS(name, bits) … #define DECLARE_TI_ADS7950_12_CHANNELS(name, bits) … #define DECLARE_TI_ADS7950_16_CHANNELS(name, bits) … static DECLARE_TI_ADS7950_4_CHANNELS(ti_ads7950, 12); static DECLARE_TI_ADS7950_8_CHANNELS(ti_ads7951, 12); static DECLARE_TI_ADS7950_12_CHANNELS(ti_ads7952, 12); static DECLARE_TI_ADS7950_16_CHANNELS(ti_ads7953, 12); static DECLARE_TI_ADS7950_4_CHANNELS(ti_ads7954, 10); static DECLARE_TI_ADS7950_8_CHANNELS(ti_ads7955, 10); static DECLARE_TI_ADS7950_12_CHANNELS(ti_ads7956, 10); static DECLARE_TI_ADS7950_16_CHANNELS(ti_ads7957, 10); static DECLARE_TI_ADS7950_4_CHANNELS(ti_ads7958, 8); static DECLARE_TI_ADS7950_8_CHANNELS(ti_ads7959, 8); static DECLARE_TI_ADS7950_12_CHANNELS(ti_ads7960, 8); static DECLARE_TI_ADS7950_16_CHANNELS(ti_ads7961, 8); static const struct ti_ads7950_chip_info ti_ads7950_chip_info[] = …; /* * ti_ads7950_update_scan_mode() setup the spi transfer buffer for the new * scan mask */ static int ti_ads7950_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *active_scan_mask) { … } static irqreturn_t ti_ads7950_trigger_handler(int irq, void *p) { … } static int ti_ads7950_scan_direct(struct iio_dev *indio_dev, unsigned int ch) { … } static int ti_ads7950_get_range(struct ti_ads7950_state *st) { … } static int ti_ads7950_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long m) { … } static const struct iio_info ti_ads7950_info = …; static void ti_ads7950_set(struct gpio_chip *chip, unsigned int offset, int value) { … } static int ti_ads7950_get(struct gpio_chip *chip, unsigned int offset) { … } static int ti_ads7950_get_direction(struct gpio_chip *chip, unsigned int offset) { … } static int _ti_ads7950_set_direction(struct gpio_chip *chip, int offset, int input) { … } static int ti_ads7950_direction_input(struct gpio_chip *chip, unsigned int offset) { … } static int ti_ads7950_direction_output(struct gpio_chip *chip, unsigned int offset, int value) { … } static int ti_ads7950_init_hw(struct ti_ads7950_state *st) { … } static int ti_ads7950_probe(struct spi_device *spi) { … } static void ti_ads7950_remove(struct spi_device *spi) { … } static const struct spi_device_id ti_ads7950_id[] = …; MODULE_DEVICE_TABLE(spi, ti_ads7950_id); static const struct of_device_id ads7950_of_table[] = …; MODULE_DEVICE_TABLE(of, ads7950_of_table); static struct spi_driver ti_ads7950_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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