diff options
| -rw-r--r-- | drivers/iio/adc/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/iio/adc/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iio/adc/ad_sigma_delta.c | 558 | ||||
| -rw-r--r-- | include/linux/iio/adc/ad_sigma_delta.h | 173 |
4 files changed, 737 insertions, 0 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 8a78b4f3ef58..a2c50713b0b6 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -3,6 +3,11 @@ # menu "Analog to digital converters" +config AD_SIGMA_DELTA + tristate + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + config AD7266 tristate "Analog Devices AD7265/AD7266 ADC driver" depends on SPI_MASTER diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 52eec254c38c..5989356c5735 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -2,5 +2,6 @@ # Makefile for IIO ADC drivers # +obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o obj-$(CONFIG_AD7266) += ad7266.o obj-$(CONFIG_AT91_ADC) += at91_adc.o diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c new file mode 100644 index 000000000000..ae847c5a1361 --- /dev/null +++ b/drivers/iio/adc/ad_sigma_delta.c @@ -0,0 +1,558 @@ +/* + * Support code for Analog Devices Sigma-Delta ADCs + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ + +#include <linux/interrupt.h> +#include <linux/device.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/spi/spi.h> +#include <linux/err.h> +#include <linux/module.h> + +#include <linux/iio/iio.h> +#include <linux/iio/sysfs.h> +#include <linux/iio/buffer.h> +#include <linux/iio/trigger.h> +#include <linux/iio/trigger_consumer.h> +#include <linux/iio/triggered_buffer.h> +#include <linux/iio/adc/ad_sigma_delta.h> + +#include <asm/unaligned.h> + + +#define AD_SD_COMM_CHAN_MASK 0x3 + +#define AD_SD_REG_COMM 0x00 +#define AD_SD_REG_DATA 0x03 + +/** + * ad_sd_set_comm() - Set communications register + * + * @sigma_delta: The sigma delta device + * @comm: New value for the communications register + */ +void ad_sd_set_comm(struct ad_sigma_delta *sigma_delta, uint8_t comm) +{ + /* Some variants use the lower two bits of the communications register + * to select the channel */ + sigma_delta->comm = comm & AD_SD_COMM_CHAN_MASK; +} +EXPORT_SYMBOL_GPL(ad_sd_set_comm); + +/** + * ad_sd_write_reg() - Write a register + * + * @sigma_delta: The sigma delta device + * @reg: Address of the register + * @size: Size of the register (0-3) + * @val: Value to write to the register + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_write_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg, + unsigned int size, unsigned int val) +{ + uint8_t *data = sigma_delta->data; + struct spi_transfer t = { + .tx_buf = data, + .len = size + 1, + .cs_change = sigma_delta->bus_locked, + }; + struct spi_message m; + int ret; + + data[0] = (reg << sigma_delta->info->addr_shift) | sigma_delta->comm; + + switch (size) { + case 3: + data[1] = val >> 16; + data[2] = val >> 8; + data[3] = val; + break; + case 2: + put_unaligned_be16(val, &data[1]); + break; + case 1: + data[1] = val; + break; + case 0: + break; + default: + return -EINVAL; + } + + spi_message_init(&m); + spi_message_add_tail(&t, &m); + + if (sigma_delta->bus_locked) + ret = spi_sync_locked(sigma_delta->spi, &m); + else + ret = spi_sync(sigma_delta->spi, &m); + + return ret; +} +EXPORT_SYMBOL_GPL(ad_sd_write_reg); + +static int ad_sd_read_reg_raw(struct ad_sigma_delta *sigma_delta, + unsigned int reg, unsigned int size, uint8_t *val) +{ + uint8_t *data = sigma_delta->data; + int ret; + struct spi_transfer t[] = { + { + .tx_buf = data, + .len = 1, + }, { + .rx_buf = val, + .len = size, + .cs_change = sigma_delta->bus_locked, + }, + }; + struct spi_message m; + + spi_message_init(&m); + + if (sigma_delta->info->has_registers) { + data[0] = reg << sigma_delta->info->addr_shift; + data[0] |= sigma_delta->info->read_mask; + spi_message_add_tail(&t[0], &m); + } + spi_message_add_tail(&t[1], &m); + + if (sigma_delta->bus_locked) + ret = spi_sync_locked(sigma_delta->spi, &m); + else + ret = spi_sync(sigma_delta->spi, &m); + + return ret; +} + +/** + * ad_sd_read_reg() - Read a register + * + * @sigma_delta: The sigma delta device + * @reg: Address of the register + * @size: Size of the register (1-4) + * @val: Read value + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_read_reg(struct ad_sigma_delta *sigma_delta, + unsigned int reg, unsigned int size, unsigned int *val) +{ + int ret; + + ret = ad_sd_read_reg_raw(sigma_delta, reg, size, sigma_delta->data); + if (ret < 0) + goto out; + + switch (size) { + case 4: + *val = get_unaligned_be32(sigma_delta->data); + break; + case 3: + *val = (sigma_delta->data[0] << 16) | + (sigma_delta->data[1] << 8) | + sigma_delta->data[2]; + break; + case 2: + *val = get_unaligned_be16(sigma_delta->data); + break; + case 1: + *val = sigma_delta->data[0]; + break; + default: + ret = -EINVAL; + break; + } + +out: + return ret; +} +EXPORT_SYMBOL_GPL(ad_sd_read_reg); + +static int ad_sd_calibrate(struct ad_sigma_delta *sigma_delta, + unsigned int mode, unsigned int channel) +{ + int ret; + + ret = ad_sigma_delta_set_channel(sigma_delta, channel); + if (ret) + return ret; + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + INIT_COMPLETION(sigma_delta->completion); + + ret = ad_sigma_delta_set_mode(sigma_delta, mode); + if (ret < 0) + goto out; + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + ret = wait_for_completion_timeout(&sigma_delta->completion, 2*HZ); + if (ret == 0) { + sigma_delta->irq_dis = true; + disable_irq_nosync(sigma_delta->spi->irq); + ret = -EIO; + } else { + ret = 0; + } +out: + sigma_delta->bus_locked = false; + spi_bus_unlock(sigma_delta->spi->master); + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + + return ret; +} + +/** + * ad_sd_calibrate_all() - Performs channel calibration + * @sigma_delta: The sigma delta device + * @cb: Array of channels and calibration type to perform + * @n: Number of items in cb + * + * Returns 0 on success, an error code otherwise. + **/ +int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta, + const struct ad_sd_calib_data *cb, unsigned int n) +{ + unsigned int i; + int ret; + + for (i = 0; i < n; i++) { + ret = ad_sd_calibrate(sigma_delta, cb[i].mode, cb[i].channel); + if (ret) + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_calibrate_all); + +/** + * ad_sigma_delta_single_conversion() - Performs a single data conversion + * @indio_dev: The IIO device + * @chan: The conversion is done for this channel + * @val: Pointer to the location where to store the read value + * + * Returns: 0 on success, an error value otherwise. + */ +int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int sample, raw_sample; + int ret = 0; + + if (iio_buffer_enabled(indio_dev)) + return -EBUSY; + + mutex_lock(&indio_dev->mlock); + ad_sigma_delta_set_channel(sigma_delta, chan->address); + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + INIT_COMPLETION(sigma_delta->completion); + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_SINGLE); + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + ret = wait_for_completion_interruptible_timeout( + &sigma_delta->completion, HZ); + + sigma_delta->bus_locked = false; + spi_bus_unlock(sigma_delta->spi->master); + + if (ret == 0) + ret = -EIO; + if (ret < 0) + goto out; + + ret = ad_sd_read_reg(sigma_delta, AD_SD_REG_DATA, + DIV_ROUND_UP(chan->scan_type.realbits + chan->scan_type.shift, 8), + &raw_sample); + +out: + if (!sigma_delta->irq_dis) { + disable_irq_nosync(sigma_delta->spi->irq); + sigma_delta->irq_dis = true; + } + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + mutex_unlock(&indio_dev->mlock); + + if (ret) + return ret; + + sample = raw_sample >> chan->scan_type.shift; + sample &= (1 << chan->scan_type.realbits) - 1; + *val = sample; + + ret = ad_sigma_delta_postprocess_sample(sigma_delta, raw_sample); + if (ret) + return ret; + + return IIO_VAL_INT; +} +EXPORT_SYMBOL_GPL(ad_sigma_delta_single_conversion); + +static int ad_sd_buffer_postenable(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int channel; + int ret; + + ret = iio_triggered_buffer_postenable(indio_dev); + if (ret < 0) + return ret; + + channel = find_first_bit(indio_dev->active_scan_mask, + indio_dev->masklength); + ret = ad_sigma_delta_set_channel(sigma_delta, + indio_dev->channels[channel].address); + if (ret) + goto err_predisable; + + spi_bus_lock(sigma_delta->spi->master); + sigma_delta->bus_locked = true; + ret = ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_CONTINUOUS); + if (ret) + goto err_unlock; + + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + + return 0; + +err_unlock: + spi_bus_unlock(sigma_delta->spi->master); +err_predisable: + + return ret; +} + +static int ad_sd_buffer_postdisable(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + INIT_COMPLETION(sigma_delta->completion); + wait_for_completion_timeout(&sigma_delta->completion, HZ); + + if (!sigma_delta->irq_dis) { + disable_irq_nosync(sigma_delta->spi->irq); + sigma_delta->irq_dis = true; + } + + ad_sigma_delta_set_mode(sigma_delta, AD_SD_MODE_IDLE); + + sigma_delta->bus_locked = false; + return spi_bus_unlock(sigma_delta->spi->master); +} + +static irqreturn_t ad_sd_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf = p; + struct iio_dev *indio_dev = pf->indio_dev; + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + unsigned int reg_size; + uint8_t data[16]; + int ret; + + memset(data, 0x00, 16); + + /* Guaranteed to be aligned with 8 byte boundary */ + if (indio_dev->scan_timestamp) + ((s64 *)data)[1] = pf->timestamp; + + reg_size = indio_dev->channels[0].scan_type.realbits + + indio_dev->channels[0].scan_type.shift; + reg_size = DIV_ROUND_UP(reg_size, 8); + + switch (reg_size) { + case 4: + case 2: + case 1: + ret = ad_sd_read_reg_raw(sigma_delta, AD_SD_REG_DATA, + reg_size, &data[0]); + break; + case 3: + /* We store 24 bit samples in a 32 bit word. Keep the upper + * byte set to zero. */ + ret = ad_sd_read_reg_raw(sigma_delta, AD_SD_REG_DATA, + reg_size, &data[1]); + break; + } + + iio_push_to_buffer(indio_dev->buffer, (uint8_t *)data, pf->timestamp); + + iio_trigger_notify_done(indio_dev->trig); + sigma_delta->irq_dis = false; + enable_irq(sigma_delta->spi->irq); + + return IRQ_HANDLED; +} + +static const struct iio_buffer_setup_ops ad_sd_buffer_setup_ops = { + .preenable = &iio_sw_buffer_preenable, + .postenable = &ad_sd_buffer_postenable, + .predisable = &iio_triggered_buffer_predisable, + .postdisable = &ad_sd_buffer_postdisable, + .validate_scan_mask = &iio_validate_scan_mask_onehot, +}; + +static irqreturn_t ad_sd_data_rdy_trig_poll(int irq, void *private) +{ + struct ad_sigma_delta *sigma_delta = private; + + complete(&sigma_delta->completion); + disable_irq_nosync(irq); + sigma_delta->irq_dis = true; + iio_trigger_poll(sigma_delta->trig, iio_get_time_ns()); + + return IRQ_HANDLED; +} + +/** + * ad_sd_validate_trigger() - validate_trigger callback for ad_sigma_delta devices + * @indio_dev: The IIO device + * @trig: The new trigger + * + * Returns: 0 if the 'trig' matches the trigger registered by the ad_sigma_delta + * device, -EINVAL otherwise. + */ +int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + if (sigma_delta->trig != trig) + return -EINVAL; + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_validate_trigger); + +static const struct iio_trigger_ops ad_sd_trigger_ops = { + .owner = THIS_MODULE, +}; + +static int ad_sd_probe_trigger(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + int ret; + + sigma_delta->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, + indio_dev->id); + if (sigma_delta->trig == NULL) { + ret = -ENOMEM; + goto error_ret; + } + sigma_delta->trig->ops = &ad_sd_trigger_ops; + init_completion(&sigma_delta->completion); + + ret = request_irq(sigma_delta->spi->irq, + ad_sd_data_rdy_trig_poll, + IRQF_TRIGGER_LOW, + indio_dev->name, + sigma_delta); + if (ret) + goto error_free_trig; + + if (!sigma_delta->irq_dis) { + sigma_delta->irq_dis = true; + disable_irq_nosync(sigma_delta->spi->irq); + } + sigma_delta->trig->dev.parent = &sigma_delta->spi->dev; + sigma_delta->trig->private_data = sigma_delta; + + ret = iio_trigger_register(sigma_delta->trig); + if (ret) + goto error_free_irq; + + /* select default trigger */ + indio_dev->trig = sigma_delta->trig; + + return 0; + +error_free_irq: + free_irq(sigma_delta->spi->irq, sigma_delta); +error_free_trig: + iio_trigger_free(sigma_delta->trig); +error_ret: + return ret; +} + +static void ad_sd_remove_trigger(struct iio_dev *indio_dev) +{ + struct ad_sigma_delta *sigma_delta = iio_device_get_drvdata(indio_dev); + + iio_trigger_unregister(sigma_delta->trig); + free_irq(sigma_delta->spi->irq, sigma_delta); + iio_trigger_free(sigma_delta->trig); +} + +/** + * ad_sd_setup_buffer_and_trigger() - + * @indio_dev: The IIO device + */ +int ad_sd_setup_buffer_and_trigger(struct iio_dev *indio_dev) +{ + int ret; + + ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, + &ad_sd_trigger_handler, &ad_sd_buffer_setup_ops); + if (ret) + return ret; + + ret = ad_sd_probe_trigger(indio_dev); + if (ret) { + iio_triggered_buffer_cleanup(indio_dev); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_setup_buffer_and_trigger); + +/** + * ad_sd_cleanup_buffer_and_trigger() - + * @indio_dev: The IIO device + */ +void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev) +{ + ad_sd_remove_trigger(indio_dev); + iio_triggered_buffer_cleanup(indio_dev); +} +EXPORT_SYMBOL_GPL(ad_sd_cleanup_buffer_and_trigger); + +/** + * ad_sd_init() - Initializes a ad_sigma_delta struct + * @sigma_delta: The ad_sigma_delta device + * @indio_dev: The IIO device which the Sigma Delta device is used for + * @spi: The SPI device for the ad_sigma_delta device + * @info: Device specific callbacks and options + * + * This function needs to be called before any other operations are performed on + * the ad_sigma_delta struct. + */ +int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, + struct spi_device *spi, const struct ad_sigma_delta_info *info) +{ + sigma_delta->spi = spi; + sigma_delta->info = info; + iio_device_set_drvdata(indio_dev, sigma_delta); + + return 0; +} +EXPORT_SYMBOL_GPL(ad_sd_init); + +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); +MODULE_DESCRIPTION("Analog Devices Sigma-Delta ADCs"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/iio/adc/ad_sigma_delta.h b/include/linux/iio/adc/ad_sigma_delta.h new file mode 100644 index 000000000000..2e4eab9868a3 --- /dev/null +++ b/include/linux/iio/adc/ad_sigma_delta.h @@ -0,0 +1,173 @@ +/* + * Support code for Analog Devices Sigma-Delta ADCs + * + * Copyright 2012 Analog Devices Inc. + * Author: Lars-Peter Clausen <lars@metafoo.de> + * + * Licensed under the GPL-2. + */ +#ifndef __AD_SIGMA_DELTA_H__ +#define __AD_SIGMA_DELTA_H__ + +enum ad_sigma_delta_mode { + AD_SD_MODE_CONTINUOUS = 0, + AD_SD_MODE_SINGLE = 1, + AD_SD_MODE_IDLE = 2, + AD_SD_MODE_POWERDOWN = 3, +}; + +/** + * struct ad_sigma_delta_calib_data - Calibration data for Sigma Delta devices + * @mode: Calibration mode. + * @channel: Calibration channel. + */ +struct ad_sd_calib_data { + unsigned int mode; + unsigned int channel; +}; + +struct ad_sigma_delta; +struct iio_dev; + +/** + * struct ad_sigma_delta_info - Sigma Delta driver specific callbacks and options + * @set_channel: Will be called to select the current channel, may be NULL. + * @set_mode: Will be called to select the current mode, may be NULL. + * @postprocess_sample: Is called for each sampled data word, can be used to + * modify or drop the sample data, it, may be NULL. + * @has_registers: true if the device has writable and readable registers, false + * if there is just one read-only sample data shift register. + * @addr_shift: Shift of the register address in the communications register. + * @read_mask: Mask for the communications register having the read bit set. + */ +struct ad_sigma_delta_info { + int (*set_channel)(struct ad_sigma_delta *, unsigned int channel); + int (*set_mode)(struct ad_sigma_delta *, enum ad_sigma_delta_mode mode); + int (*postprocess_sample)(struct ad_sigma_delta *, unsigned int raw_sample); + bool has_registers; + unsigned int addr_shift; + unsigned int read_mask; +}; + +/** + * struct ad_sigma_delta - Sigma Delta device struct + * @spi: The spi device associated with the Sigma Delta device. + * @trig: The IIO trigger associated with the Sigma Delta device. + * + * Most of the fields are private to the sigma delta library code and should not + * be accessed by individual drivers. + */ +struct ad_sigma_delta { + struct spi_device *spi; + struct iio_trigger *trig; + +/* private: */ + struct completion completion; + bool irq_dis; + + bool bus_locked; + + uint8_t comm; + + const struct ad_sigma_delta_info *info; + + /* + * DMA (thus cache coherency maintenance) requires the + * transfer buffers to live in their own cache lines. + */ + uint8_t data[4] ____cacheline_aligned; +}; + +static inline int ad_sigma_delta_set_channel(struct ad_sigma_delta *sd, + unsigned int channel) +{ + if (sd->info->set_channel) + return sd->info->set_channel(sd, channel); + + return 0; +} + +static inline int ad_sigma_delta_set_mode(struct ad_sigma_delta *sd, + unsigned int mode) +{ + if (sd->info->set_mode) + return sd->info->set_mode(sd, mode); + + return 0; +} + +static inline int ad_sigma_delta_postprocess_sample(struct ad_sigma_delta *sd, + unsigned int raw_sample) +{ + if (sd->info->postprocess_sample) + return sd->info->postprocess_sample(sd, raw_sample); + + return 0; +} + +void ad_sd_set_comm(struct ad_sigma_delta *sigma_delta, uint8_t comm); +int ad_sd_write_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg, + unsigned int size, unsigned int val); +int ad_sd_read_reg(struct ad_sigma_delta *sigma_delta, unsigned int reg, + unsigned int size, unsigned int *val); + +int ad_sigma_delta_single_conversion(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan, int *val); +int ad_sd_calibrate_all(struct ad_sigma_delta *sigma_delta, + const struct ad_sd_calib_data *cd, unsigned int n); +int ad_sd_init(struct ad_sigma_delta *sigma_delta, struct iio_dev *indio_dev, + struct spi_device *spi, const struct ad_sigma_delta_info *info); + +int ad_sd_setup_buffer_and_trigger(struct iio_dev *indio_dev); +void ad_sd_cleanup_buffer_and_trigger(struct iio_dev *indio_dev); + +int ad_sd_validate_trigger(struct iio_dev *indio_dev, struct iio_trigger *trig); + +#define __AD_SD_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ + _storagebits, _shift, _extend_name, _type) \ + { \ + .type = (_type), \ + .differential = (_channel2 == -1 ? 0 : 1), \ + .indexed = 1, \ + .channel = (_channel1), \ + .channel2 = (_channel2), \ + .address = (_address), \ + .extend_name = (_extend_name), \ + .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ + IIO_CHAN_INFO_SCALE_SHARED_BIT | \ + IIO_CHAN_INFO_OFFSET_SEPARATE_BIT, \ + .scan_index = (_si), \ + .scan_type = { \ + .sign = 'u', \ + .realbits = (_bits), \ + .storagebits = (_storagebits), \ + .shift = (_shift), \ + .endianness = IIO_BE, \ + }, \ + } + +#define AD_SD_DIFF_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ + _storagebits, _shift) \ + __AD_SD_CHANNEL(_si, _channel1, _channel2, _address, _bits, \ + _storagebits, _shift, NULL, IIO_VOLTAGE) + +#define AD_SD_SHORTED_CHANNEL(_si, _channel, _address, _bits, \ + _storagebits, _shift) \ + __AD_SD_CHANNEL(_si, _channel, _channel, _address, _bits, \ + _storagebits, _shift, "shorted", IIO_VOLTAGE) + +#define AD_SD_CHANNEL(_si, _channel, _address, _bits, \ + _storagebits, _shift) \ + __AD_SD_CHANNEL(_si, _channel, -1, _address, _bits, \ + _storagebits, _shift, NULL, IIO_VOLTAGE) + +#define AD_SD_TEMP_CHANNEL(_si, _address, _bits, _storagebits, _shift) \ + __AD_SD_CHANNEL(_si, 0, -1, _address, _bits, \ + _storagebits, _shift, NULL, IIO_TEMP) + +#define AD_SD_SUPPLY_CHANNEL(_si, _channel, _address, _bits, _storagebits, \ + _shift) \ + __AD_SD_CHANNEL(_si, _channel, -1, _address, _bits, \ + _storagebits, _shift, "supply", IIO_VOLTAGE) + +#endif |