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46 lines
1.3 KiB
46 lines
1.3 KiB
3 years ago
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.. SPDX-License-Identifier: GPL-2.0-or-later
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Kernel driver max127
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====================
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Author:
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* Tao Ren <[email protected]>
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Supported chips:
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* Maxim MAX127
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Prefix: 'max127'
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Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX127-MAX128.pdf
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Description
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-----------
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The MAX127 is a multirange, 12-bit data acquisition system (DAS) providing
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8 analog input channels that are independently software programmable for
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a variety of ranges. The available ranges are {0,5V}, {0,10V}, {-5,5V}
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and {-10,10V}.
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The MAX127 features a 2-wire, I2C-compatible serial interface that allows
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communication among multiple devices using SDA and SCL lines.
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Sysfs interface
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---------------
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============== ==============================================================
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in[0-7]_input The input voltage (in mV) of the corresponding channel.
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RO
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in[0-7]_min The lower input limit (in mV) for the corresponding channel.
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ADC range and LSB will be updated when the limit is changed.
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For the MAX127, it will be adjusted to -10000, -5000, or 0.
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RW
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in[0-7]_max The higher input limit (in mV) for the corresponding channel.
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ADC range and LSB will be updated when the limit is changed.
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For the MAX127, it will be adjusted to 0, 5000, or 10000.
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RW
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============== ==============================================================
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