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- // 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 5000
- #define TI_ADS7950_CR_GPIO BIT(14)
- #define TI_ADS7950_CR_MANUAL BIT(12)
- #define TI_ADS7950_CR_WRITE BIT(11)
- #define TI_ADS7950_CR_CHAN(ch) ((ch) << 7)
- #define TI_ADS7950_CR_RANGE_5V BIT(6)
- #define TI_ADS7950_CR_GPIO_DATA BIT(4)
- #define TI_ADS7950_MAX_CHAN 16
- #define TI_ADS7950_NUM_GPIOS 4
- #define TI_ADS7950_TIMESTAMP_SIZE (sizeof(int64_t) / sizeof(__be16))
- /* val = value, dec = left shift, bits = number of bits of the mask */
- #define TI_ADS7950_EXTRACT(val, dec, bits) \
- (((val) >> (dec)) & ((1 << (bits)) - 1))
- #define TI_ADS7950_MAN_CMD(cmd) (TI_ADS7950_CR_MANUAL | (cmd))
- #define TI_ADS7950_GPIO_CMD(cmd) (TI_ADS7950_CR_GPIO | (cmd))
- /* Manual mode configuration */
- #define TI_ADS7950_MAN_CMD_SETTINGS(st) \
- (TI_ADS7950_MAN_CMD(TI_ADS7950_CR_WRITE | st->cmd_settings_bitmask))
- /* GPIO mode configuration */
- #define TI_ADS7950_GPIO_CMD_SETTINGS(st) \
- (TI_ADS7950_GPIO_CMD(st->gpio_cmd_settings_bitmask))
- struct ti_ads7950_state {
- struct spi_device *spi;
- struct spi_transfer ring_xfer;
- struct spi_transfer scan_single_xfer[3];
- struct spi_message ring_msg;
- struct spi_message scan_single_msg;
- /* Lock to protect the spi xfer buffers */
- struct mutex slock;
- struct gpio_chip chip;
- struct regulator *reg;
- unsigned int vref_mv;
- /*
- * Bitmask of lower 7 bits used for configuration
- * These bits only can be written when TI_ADS7950_CR_WRITE
- * is set, otherwise it retains its original state.
- * [0-3] GPIO signal
- * [4] Set following frame to return GPIO signal values
- * [5] Powers down device
- * [6] Sets Vref range1(2.5v) or range2(5v)
- *
- * Bits present on Manual/Auto1/Auto2 commands
- */
- unsigned int cmd_settings_bitmask;
- /*
- * Bitmask of GPIO command
- * [0-3] GPIO direction
- * [4-6] Different GPIO alarm mode configurations
- * [7] GPIO 2 as device range input
- * [8] GPIO 3 as device power down input
- * [9] Reset all registers
- * [10-11] N/A
- */
- unsigned int gpio_cmd_settings_bitmask;
- /*
- * DMA (thus cache coherency maintenance) may require the
- * transfer buffers to live in their own cache lines.
- */
- u16 rx_buf[TI_ADS7950_MAX_CHAN + 2 + TI_ADS7950_TIMESTAMP_SIZE]
- __aligned(IIO_DMA_MINALIGN);
- u16 tx_buf[TI_ADS7950_MAX_CHAN + 2];
- u16 single_tx;
- u16 single_rx;
- };
- struct ti_ads7950_chip_info {
- const struct iio_chan_spec *channels;
- unsigned int num_channels;
- };
- enum ti_ads7950_id {
- TI_ADS7950,
- TI_ADS7951,
- TI_ADS7952,
- TI_ADS7953,
- TI_ADS7954,
- TI_ADS7955,
- TI_ADS7956,
- TI_ADS7957,
- TI_ADS7958,
- TI_ADS7959,
- TI_ADS7960,
- TI_ADS7961,
- };
- #define TI_ADS7950_V_CHAN(index, bits) \
- { \
- .type = IIO_VOLTAGE, \
- .indexed = 1, \
- .channel = index, \
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
- .address = index, \
- .datasheet_name = "CH##index", \
- .scan_index = index, \
- .scan_type = { \
- .sign = 'u', \
- .realbits = bits, \
- .storagebits = 16, \
- .shift = 12 - (bits), \
- .endianness = IIO_CPU, \
- }, \
- }
- #define DECLARE_TI_ADS7950_4_CHANNELS(name, bits) \
- const struct iio_chan_spec name ## _channels[] = { \
- TI_ADS7950_V_CHAN(0, bits), \
- TI_ADS7950_V_CHAN(1, bits), \
- TI_ADS7950_V_CHAN(2, bits), \
- TI_ADS7950_V_CHAN(3, bits), \
- IIO_CHAN_SOFT_TIMESTAMP(4), \
- }
- #define DECLARE_TI_ADS7950_8_CHANNELS(name, bits) \
- const struct iio_chan_spec name ## _channels[] = { \
- TI_ADS7950_V_CHAN(0, bits), \
- TI_ADS7950_V_CHAN(1, bits), \
- TI_ADS7950_V_CHAN(2, bits), \
- TI_ADS7950_V_CHAN(3, bits), \
- TI_ADS7950_V_CHAN(4, bits), \
- TI_ADS7950_V_CHAN(5, bits), \
- TI_ADS7950_V_CHAN(6, bits), \
- TI_ADS7950_V_CHAN(7, bits), \
- IIO_CHAN_SOFT_TIMESTAMP(8), \
- }
- #define DECLARE_TI_ADS7950_12_CHANNELS(name, bits) \
- const struct iio_chan_spec name ## _channels[] = { \
- TI_ADS7950_V_CHAN(0, bits), \
- TI_ADS7950_V_CHAN(1, bits), \
- TI_ADS7950_V_CHAN(2, bits), \
- TI_ADS7950_V_CHAN(3, bits), \
- TI_ADS7950_V_CHAN(4, bits), \
- TI_ADS7950_V_CHAN(5, bits), \
- TI_ADS7950_V_CHAN(6, bits), \
- TI_ADS7950_V_CHAN(7, bits), \
- TI_ADS7950_V_CHAN(8, bits), \
- TI_ADS7950_V_CHAN(9, bits), \
- TI_ADS7950_V_CHAN(10, bits), \
- TI_ADS7950_V_CHAN(11, bits), \
- IIO_CHAN_SOFT_TIMESTAMP(12), \
- }
- #define DECLARE_TI_ADS7950_16_CHANNELS(name, bits) \
- const struct iio_chan_spec name ## _channels[] = { \
- TI_ADS7950_V_CHAN(0, bits), \
- TI_ADS7950_V_CHAN(1, bits), \
- TI_ADS7950_V_CHAN(2, bits), \
- TI_ADS7950_V_CHAN(3, bits), \
- TI_ADS7950_V_CHAN(4, bits), \
- TI_ADS7950_V_CHAN(5, bits), \
- TI_ADS7950_V_CHAN(6, bits), \
- TI_ADS7950_V_CHAN(7, bits), \
- TI_ADS7950_V_CHAN(8, bits), \
- TI_ADS7950_V_CHAN(9, bits), \
- TI_ADS7950_V_CHAN(10, bits), \
- TI_ADS7950_V_CHAN(11, bits), \
- TI_ADS7950_V_CHAN(12, bits), \
- TI_ADS7950_V_CHAN(13, bits), \
- TI_ADS7950_V_CHAN(14, bits), \
- TI_ADS7950_V_CHAN(15, bits), \
- IIO_CHAN_SOFT_TIMESTAMP(16), \
- }
- 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] = {
- .channels = ti_ads7950_channels,
- .num_channels = ARRAY_SIZE(ti_ads7950_channels),
- },
- [TI_ADS7951] = {
- .channels = ti_ads7951_channels,
- .num_channels = ARRAY_SIZE(ti_ads7951_channels),
- },
- [TI_ADS7952] = {
- .channels = ti_ads7952_channels,
- .num_channels = ARRAY_SIZE(ti_ads7952_channels),
- },
- [TI_ADS7953] = {
- .channels = ti_ads7953_channels,
- .num_channels = ARRAY_SIZE(ti_ads7953_channels),
- },
- [TI_ADS7954] = {
- .channels = ti_ads7954_channels,
- .num_channels = ARRAY_SIZE(ti_ads7954_channels),
- },
- [TI_ADS7955] = {
- .channels = ti_ads7955_channels,
- .num_channels = ARRAY_SIZE(ti_ads7955_channels),
- },
- [TI_ADS7956] = {
- .channels = ti_ads7956_channels,
- .num_channels = ARRAY_SIZE(ti_ads7956_channels),
- },
- [TI_ADS7957] = {
- .channels = ti_ads7957_channels,
- .num_channels = ARRAY_SIZE(ti_ads7957_channels),
- },
- [TI_ADS7958] = {
- .channels = ti_ads7958_channels,
- .num_channels = ARRAY_SIZE(ti_ads7958_channels),
- },
- [TI_ADS7959] = {
- .channels = ti_ads7959_channels,
- .num_channels = ARRAY_SIZE(ti_ads7959_channels),
- },
- [TI_ADS7960] = {
- .channels = ti_ads7960_channels,
- .num_channels = ARRAY_SIZE(ti_ads7960_channels),
- },
- [TI_ADS7961] = {
- .channels = ti_ads7961_channels,
- .num_channels = ARRAY_SIZE(ti_ads7961_channels),
- },
- };
- /*
- * 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)
- {
- struct ti_ads7950_state *st = iio_priv(indio_dev);
- int i, cmd, len;
- len = 0;
- for_each_set_bit(i, active_scan_mask, indio_dev->num_channels) {
- cmd = TI_ADS7950_MAN_CMD(TI_ADS7950_CR_CHAN(i));
- st->tx_buf[len++] = cmd;
- }
- /* Data for the 1st channel is not returned until the 3rd transfer */
- st->tx_buf[len++] = 0;
- st->tx_buf[len++] = 0;
- st->ring_xfer.len = len * 2;
- return 0;
- }
- static irqreturn_t ti_ads7950_trigger_handler(int irq, void *p)
- {
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- struct ti_ads7950_state *st = iio_priv(indio_dev);
- int ret;
- mutex_lock(&st->slock);
- ret = spi_sync(st->spi, &st->ring_msg);
- if (ret < 0)
- goto out;
- iio_push_to_buffers_with_timestamp(indio_dev, &st->rx_buf[2],
- iio_get_time_ns(indio_dev));
- out:
- mutex_unlock(&st->slock);
- iio_trigger_notify_done(indio_dev->trig);
- return IRQ_HANDLED;
- }
- static int ti_ads7950_scan_direct(struct iio_dev *indio_dev, unsigned int ch)
- {
- struct ti_ads7950_state *st = iio_priv(indio_dev);
- int ret, cmd;
- mutex_lock(&st->slock);
- cmd = TI_ADS7950_MAN_CMD(TI_ADS7950_CR_CHAN(ch));
- st->single_tx = cmd;
- ret = spi_sync(st->spi, &st->scan_single_msg);
- if (ret)
- goto out;
- ret = st->single_rx;
- out:
- mutex_unlock(&st->slock);
- return ret;
- }
- static int ti_ads7950_get_range(struct ti_ads7950_state *st)
- {
- int vref;
- if (st->vref_mv) {
- vref = st->vref_mv;
- } else {
- vref = regulator_get_voltage(st->reg);
- if (vref < 0)
- return vref;
- vref /= 1000;
- }
- if (st->cmd_settings_bitmask & TI_ADS7950_CR_RANGE_5V)
- vref *= 2;
- return vref;
- }
- static int ti_ads7950_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val, int *val2, long m)
- {
- struct ti_ads7950_state *st = iio_priv(indio_dev);
- int ret;
- switch (m) {
- case IIO_CHAN_INFO_RAW:
- ret = ti_ads7950_scan_direct(indio_dev, chan->address);
- if (ret < 0)
- return ret;
- if (chan->address != TI_ADS7950_EXTRACT(ret, 12, 4))
- return -EIO;
- *val = TI_ADS7950_EXTRACT(ret, chan->scan_type.shift,
- chan->scan_type.realbits);
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- ret = ti_ads7950_get_range(st);
- if (ret < 0)
- return ret;
- *val = ret;
- *val2 = (1 << chan->scan_type.realbits) - 1;
- return IIO_VAL_FRACTIONAL;
- }
- return -EINVAL;
- }
- static const struct iio_info ti_ads7950_info = {
- .read_raw = &ti_ads7950_read_raw,
- .update_scan_mode = ti_ads7950_update_scan_mode,
- };
- static void ti_ads7950_set(struct gpio_chip *chip, unsigned int offset,
- int value)
- {
- struct ti_ads7950_state *st = gpiochip_get_data(chip);
- mutex_lock(&st->slock);
- if (value)
- st->cmd_settings_bitmask |= BIT(offset);
- else
- st->cmd_settings_bitmask &= ~BIT(offset);
- st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);
- spi_sync(st->spi, &st->scan_single_msg);
- mutex_unlock(&st->slock);
- }
- static int ti_ads7950_get(struct gpio_chip *chip, unsigned int offset)
- {
- struct ti_ads7950_state *st = gpiochip_get_data(chip);
- int ret;
- mutex_lock(&st->slock);
- /* If set as output, return the output */
- if (st->gpio_cmd_settings_bitmask & BIT(offset)) {
- ret = st->cmd_settings_bitmask & BIT(offset);
- goto out;
- }
- /* GPIO data bit sets SDO bits 12-15 to GPIO input */
- st->cmd_settings_bitmask |= TI_ADS7950_CR_GPIO_DATA;
- st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);
- ret = spi_sync(st->spi, &st->scan_single_msg);
- if (ret)
- goto out;
- ret = ((st->single_rx >> 12) & BIT(offset)) ? 1 : 0;
- /* Revert back to original settings */
- st->cmd_settings_bitmask &= ~TI_ADS7950_CR_GPIO_DATA;
- st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);
- ret = spi_sync(st->spi, &st->scan_single_msg);
- if (ret)
- goto out;
- out:
- mutex_unlock(&st->slock);
- return ret;
- }
- static int ti_ads7950_get_direction(struct gpio_chip *chip,
- unsigned int offset)
- {
- struct ti_ads7950_state *st = gpiochip_get_data(chip);
- /* Bitmask is inverted from GPIO framework 0=input/1=output */
- return !(st->gpio_cmd_settings_bitmask & BIT(offset));
- }
- static int _ti_ads7950_set_direction(struct gpio_chip *chip, int offset,
- int input)
- {
- struct ti_ads7950_state *st = gpiochip_get_data(chip);
- int ret = 0;
- mutex_lock(&st->slock);
- /* Only change direction if needed */
- if (input && (st->gpio_cmd_settings_bitmask & BIT(offset)))
- st->gpio_cmd_settings_bitmask &= ~BIT(offset);
- else if (!input && !(st->gpio_cmd_settings_bitmask & BIT(offset)))
- st->gpio_cmd_settings_bitmask |= BIT(offset);
- else
- goto out;
- st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);
- ret = spi_sync(st->spi, &st->scan_single_msg);
- out:
- mutex_unlock(&st->slock);
- return ret;
- }
- static int ti_ads7950_direction_input(struct gpio_chip *chip,
- unsigned int offset)
- {
- return _ti_ads7950_set_direction(chip, offset, 1);
- }
- static int ti_ads7950_direction_output(struct gpio_chip *chip,
- unsigned int offset, int value)
- {
- ti_ads7950_set(chip, offset, value);
- return _ti_ads7950_set_direction(chip, offset, 0);
- }
- static int ti_ads7950_init_hw(struct ti_ads7950_state *st)
- {
- int ret = 0;
- mutex_lock(&st->slock);
- /* Settings for Manual/Auto1/Auto2 commands */
- /* Default to 5v ref */
- st->cmd_settings_bitmask = TI_ADS7950_CR_RANGE_5V;
- st->single_tx = TI_ADS7950_MAN_CMD_SETTINGS(st);
- ret = spi_sync(st->spi, &st->scan_single_msg);
- if (ret)
- goto out;
- /* Settings for GPIO command */
- st->gpio_cmd_settings_bitmask = 0x0;
- st->single_tx = TI_ADS7950_GPIO_CMD_SETTINGS(st);
- ret = spi_sync(st->spi, &st->scan_single_msg);
- out:
- mutex_unlock(&st->slock);
- return ret;
- }
- static int ti_ads7950_probe(struct spi_device *spi)
- {
- struct ti_ads7950_state *st;
- struct iio_dev *indio_dev;
- const struct ti_ads7950_chip_info *info;
- int ret;
- spi->bits_per_word = 16;
- spi->mode |= SPI_CS_WORD;
- ret = spi_setup(spi);
- if (ret < 0) {
- dev_err(&spi->dev, "Error in spi setup\n");
- return ret;
- }
- indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
- if (!indio_dev)
- return -ENOMEM;
- st = iio_priv(indio_dev);
- spi_set_drvdata(spi, indio_dev);
- st->spi = spi;
- info = &ti_ads7950_chip_info[spi_get_device_id(spi)->driver_data];
- indio_dev->name = spi_get_device_id(spi)->name;
- indio_dev->modes = INDIO_DIRECT_MODE;
- indio_dev->channels = info->channels;
- indio_dev->num_channels = info->num_channels;
- indio_dev->info = &ti_ads7950_info;
- /* build spi ring message */
- spi_message_init(&st->ring_msg);
- st->ring_xfer.tx_buf = &st->tx_buf[0];
- st->ring_xfer.rx_buf = &st->rx_buf[0];
- /* len will be set later */
- spi_message_add_tail(&st->ring_xfer, &st->ring_msg);
- /*
- * Setup default message. The sample is read at the end of the first
- * transfer, then it takes one full cycle to convert the sample and one
- * more cycle to send the value. The conversion process is driven by
- * the SPI clock, which is why we have 3 transfers. The middle one is
- * just dummy data sent while the chip is converting the sample that
- * was read at the end of the first transfer.
- */
- st->scan_single_xfer[0].tx_buf = &st->single_tx;
- st->scan_single_xfer[0].len = 2;
- st->scan_single_xfer[0].cs_change = 1;
- st->scan_single_xfer[1].tx_buf = &st->single_tx;
- st->scan_single_xfer[1].len = 2;
- st->scan_single_xfer[1].cs_change = 1;
- st->scan_single_xfer[2].rx_buf = &st->single_rx;
- st->scan_single_xfer[2].len = 2;
- spi_message_init_with_transfers(&st->scan_single_msg,
- st->scan_single_xfer, 3);
- /* Use hard coded value for reference voltage in ACPI case */
- if (ACPI_COMPANION(&spi->dev))
- st->vref_mv = TI_ADS7950_VA_MV_ACPI_DEFAULT;
- mutex_init(&st->slock);
- st->reg = devm_regulator_get(&spi->dev, "vref");
- if (IS_ERR(st->reg)) {
- ret = dev_err_probe(&spi->dev, PTR_ERR(st->reg),
- "Failed to get regulator \"vref\"\n");
- goto error_destroy_mutex;
- }
- ret = regulator_enable(st->reg);
- if (ret) {
- dev_err(&spi->dev, "Failed to enable regulator \"vref\"\n");
- goto error_destroy_mutex;
- }
- ret = iio_triggered_buffer_setup(indio_dev, NULL,
- &ti_ads7950_trigger_handler, NULL);
- if (ret) {
- dev_err(&spi->dev, "Failed to setup triggered buffer\n");
- goto error_disable_reg;
- }
- ret = ti_ads7950_init_hw(st);
- if (ret) {
- dev_err(&spi->dev, "Failed to init adc chip\n");
- goto error_cleanup_ring;
- }
- ret = iio_device_register(indio_dev);
- if (ret) {
- dev_err(&spi->dev, "Failed to register iio device\n");
- goto error_cleanup_ring;
- }
- /* Add GPIO chip */
- st->chip.label = dev_name(&st->spi->dev);
- st->chip.parent = &st->spi->dev;
- st->chip.owner = THIS_MODULE;
- st->chip.can_sleep = true;
- st->chip.base = -1;
- st->chip.ngpio = TI_ADS7950_NUM_GPIOS;
- st->chip.get_direction = ti_ads7950_get_direction;
- st->chip.direction_input = ti_ads7950_direction_input;
- st->chip.direction_output = ti_ads7950_direction_output;
- st->chip.get = ti_ads7950_get;
- st->chip.set = ti_ads7950_set;
- ret = gpiochip_add_data(&st->chip, st);
- if (ret) {
- dev_err(&spi->dev, "Failed to init GPIOs\n");
- goto error_iio_device;
- }
- return 0;
- error_iio_device:
- iio_device_unregister(indio_dev);
- error_cleanup_ring:
- iio_triggered_buffer_cleanup(indio_dev);
- error_disable_reg:
- regulator_disable(st->reg);
- error_destroy_mutex:
- mutex_destroy(&st->slock);
- return ret;
- }
- static void ti_ads7950_remove(struct spi_device *spi)
- {
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
- struct ti_ads7950_state *st = iio_priv(indio_dev);
- gpiochip_remove(&st->chip);
- iio_device_unregister(indio_dev);
- iio_triggered_buffer_cleanup(indio_dev);
- regulator_disable(st->reg);
- mutex_destroy(&st->slock);
- }
- static const struct spi_device_id ti_ads7950_id[] = {
- { "ads7950", TI_ADS7950 },
- { "ads7951", TI_ADS7951 },
- { "ads7952", TI_ADS7952 },
- { "ads7953", TI_ADS7953 },
- { "ads7954", TI_ADS7954 },
- { "ads7955", TI_ADS7955 },
- { "ads7956", TI_ADS7956 },
- { "ads7957", TI_ADS7957 },
- { "ads7958", TI_ADS7958 },
- { "ads7959", TI_ADS7959 },
- { "ads7960", TI_ADS7960 },
- { "ads7961", TI_ADS7961 },
- { }
- };
- MODULE_DEVICE_TABLE(spi, ti_ads7950_id);
- static const struct of_device_id ads7950_of_table[] = {
- { .compatible = "ti,ads7950", .data = &ti_ads7950_chip_info[TI_ADS7950] },
- { .compatible = "ti,ads7951", .data = &ti_ads7950_chip_info[TI_ADS7951] },
- { .compatible = "ti,ads7952", .data = &ti_ads7950_chip_info[TI_ADS7952] },
- { .compatible = "ti,ads7953", .data = &ti_ads7950_chip_info[TI_ADS7953] },
- { .compatible = "ti,ads7954", .data = &ti_ads7950_chip_info[TI_ADS7954] },
- { .compatible = "ti,ads7955", .data = &ti_ads7950_chip_info[TI_ADS7955] },
- { .compatible = "ti,ads7956", .data = &ti_ads7950_chip_info[TI_ADS7956] },
- { .compatible = "ti,ads7957", .data = &ti_ads7950_chip_info[TI_ADS7957] },
- { .compatible = "ti,ads7958", .data = &ti_ads7950_chip_info[TI_ADS7958] },
- { .compatible = "ti,ads7959", .data = &ti_ads7950_chip_info[TI_ADS7959] },
- { .compatible = "ti,ads7960", .data = &ti_ads7950_chip_info[TI_ADS7960] },
- { .compatible = "ti,ads7961", .data = &ti_ads7950_chip_info[TI_ADS7961] },
- { },
- };
- MODULE_DEVICE_TABLE(of, ads7950_of_table);
- static struct spi_driver ti_ads7950_driver = {
- .driver = {
- .name = "ads7950",
- .of_match_table = ads7950_of_table,
- },
- .probe = ti_ads7950_probe,
- .remove = ti_ads7950_remove,
- .id_table = ti_ads7950_id,
- };
- module_spi_driver(ti_ads7950_driver);
- MODULE_AUTHOR("David Lechner <[email protected]>");
- MODULE_DESCRIPTION("TI TI_ADS7950 ADC");
- MODULE_LICENSE("GPL v2");
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