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/kernel/linux/linux-6.6/Documentation/devicetree/bindings/iio/afe/
Dcurrent-sense-amplifier.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/afe/current-sense-amplifier.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Current Sense Amplifier
10 - Peter Rosin <peda@axentia.se>
13 When an io-channel measures the output voltage from a current sense
15 through the sense resistor, not the voltage output. This binding
16 describes such a current sense circuit.
20 const: current-sense-amplifier
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/kernel/linux/linux-5.10/Documentation/devicetree/bindings/iio/afe/
Dcurrent-sense-amplifier.txt1 Current Sense Amplifier
4 When an io-channel measures the output voltage from a current sense
6 through the sense resistor, not the voltage output. This binding
7 describes such a current sense circuit.
10 - compatible : "current-sense-amplifier"
11 - io-channels : Channel node of a voltage io-channel.
12 - sense-resistor-micro-ohms : The sense resistance in microohms.
15 - sense-gain-mult: Amplifier gain multiplier. The default is <1>.
16 - sense-gain-div: Amplifier gain divider. The default is <1>.
21 compatible = "current-sense-amplifier";
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/kernel/linux/linux-6.6/drivers/iio/afe/
Diio-rescale.c1 // SPDX-License-Identifier: GPL-2.0
28 u32 mult; in rescale_process_scale() local
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()
77 mult = scale_type == IIO_VAL_INT_PLUS_NANO ? 1000000000L : 1000000L; in rescale_process_scale()
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/kernel/linux/linux-5.10/drivers/iio/afe/
Diio-rescale.c1 // SPDX-License-Identifier: GPL-2.0
46 return iio_read_channel_raw(rescale->source, val); in rescale_read_raw()
49 ret = iio_read_channel_scale(rescale->source, val, val2); in rescale_read_raw()
52 *val *= rescale->numerator; in rescale_read_raw()
53 *val2 *= rescale->denominator; in rescale_read_raw()
56 *val *= rescale->numerator; in rescale_read_raw()
57 if (rescale->denominator == 1) in rescale_read_raw()
59 *val2 = rescale->denominator; in rescale_read_raw()
63 tmp = div_s64(tmp, rescale->denominator); in rescale_read_raw()
64 tmp *= rescale->numerator; in rescale_read_raw()
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