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/linux/Documentation/devicetree/bindings/iio/adc/
H A Dadi,ad4170-4.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/adi,ad4170-4.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Analog Devices AD4170-4 and similar Analog to Digital Converters
10 - Marcelo Schmitt <marcelo.schmitt@analog.com>
13 Analog Devices AD4170-4 series of Sigma-delta Analog to Digital Converters.
15 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4170-4.pdf
16 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4190-4.pdf
17 https://www.analog.com/media/en/technical-documentation/data-sheets/ad4195-4.pdf
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/linux/Documentation/devicetree/bindings/iio/afe/
H A Dtemperature-sense-rtd.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/afe/temperature-sense-rtd.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Liam Beguin <liambeguin@gmail.com>
17 When an io-channel measures the output voltage across an RTD such as a
25 T = 1 / (alpha * r0 * iexc) * (V - r0 * iexc)
30 -----
32 +---+----+
34 +---+----+
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/linux/Documentation/devicetree/bindings/iio/addac/
H A Dadi,ad74115.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Cosmin Tanislav <cosmin.tanislav@analog.com>
13 The AD74115H is a single-channel software configurable input/output
17 chip solution with an SPI interface. The device features a 16-bit ADC and a
18 14-bit DAC.
25 - adi,ad74115h
30 spi-max-frequency:
33 spi-cpol: true
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/linux/drivers/iio/adc/
H A Dad4170-4.c1 // SPDX-License-Identifier: GPL-2.0+
3 * Analog Devices AD4170-4 ADC driver
6 * Author: Ana-Maria Cusco <ana-maria.cusco@analog.com>
17 #include <linux/clk-provider.h>
81 /* AD4170_CONFIG_A_REG - INTERFACE_CONFIG_A REGISTER */
229 /* Current source */
246 [AD4170_CHAN_SETUP_REG(0) ... AD4170_CHAN_MAP_REG(AD4170_MAX_ADC_CHANNELS - 1)] = 2,
249 * also interleaved but MISC, AFE, FILTER, FILTER_FS, OFFSET are 16-bit
250 * while OFFSET, GAIN are 24-bit registers so we can't init them all to
278 AD4170_REF_BUF_PRE, /* Pre-charge referrence buffer */
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/linux/drivers/iio/afe/
H A Diio-rescale.c1 // SPDX-License-Identifier: GPL-2.0
33 *val *= rescale->numerator; in rescale_process_scale()
34 if (rescale->denominator == 1) in rescale_process_scale()
36 *val2 = rescale->denominator; in rescale_process_scale()
44 if (!check_mul_overflow(*val, rescale->numerator, &_val) && in rescale_process_scale()
45 !check_mul_overflow(*val2, rescale->denominator, &_val2)) { in rescale_process_scale()
53 tmp = div_s64(tmp, rescale->denominator); in rescale_process_scale()
54 tmp *= rescale->numerator; in rescale_process_scale()
82 * *val = 1 and *val2 = -0.5 yields -1.5 not -0.5. in rescale_process_scale()
86 tmp = (s64)abs(*val) * abs(rescale->numerator); in rescale_process_scale()
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/linux/drivers/iio/temperature/
H A Dltc2983.c1 // SPDX-License-Identifier: GPL-2.0
3 * Analog Devices LTC2983 Multi-Sensor Digital Temperature Measurement System
60 (((chan - 1) * 4) + LTC2983_CHAN_ASSIGN_START_REG)
62 (((chan - 1) * 4) + LTC2983_TEMP_RES_START_REG)
312 * instance a resolution of 2^-10 means we have 10 fractional bits.
326 s64 __res = -(s32)val; in __convert_to_raw_sign()
330 return (u32)-__res; in __convert_to_raw_sign()
337 const struct device *dev = &st->spi->dev; in __ltc2983_fault_handler()
341 return -EIO; in __ltc2983_fault_handler()
354 u32 reg = LTC2983_CHAN_START_ADDR(sensor->chan); in __ltc2983_chan_assign_common()
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/linux/drivers/iio/addac/
H A Dad74115.c1 // SPDX-License-Identifier: GPL-2.0
204 * Synchronize consecutive operations when doing a one-shot
386 [AD74115_ADC_RANGE_12V_BIPOLAR] = { -12000000, 12000000 },
387 [AD74115_ADC_RANGE_2_5V_BIPOLAR] = { -2500000, 2500000 },
388 [AD74115_ADC_RANGE_2_5V_NEG] = { -2500000, 0 },
391 [AD74115_ADC_RANGE_104MV_BIPOLAR] = { -104000, 104000 },
406 return -EINVAL; in _ad74115_find_tbl_index()
428 ad74115_format_reg_write(reg, val, st->reg_tx_buf); in ad74115_reg_write()
430 return spi_write(st->spi, st->reg_tx_buf, AD74115_FRAME_SIZE); in ad74115_reg_write()
435 struct device *dev = &st->spi->dev; in ad74115_crc_check()
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