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authorTao Ren <rentao.bupt@gmail.com>2020-11-23 10:56:58 -0800
committerGuenter Roeck <linux@roeck-us.net>2020-12-02 17:42:24 -0800
commit12d36c8362d090ce108ce4283f9e655373e2b472 (patch)
tree6197aad7d0295dfb13bf402a680563f5d7a8ac7b /Documentation/hwmon/max127.rst
parent8efd10147cd282c99fa5109b5497017a503ecbcd (diff)
docs: hwmon: Document max127 driver
Add documentation for the max127 hardware monitoring driver. Signed-off-by: Tao Ren <rentao.bupt@gmail.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/20201123185658.7632-3-rentao.bupt@gmail.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver max127
+====================
+
+Author:
+
+ * Tao Ren <rentao.bupt@gmail.com>
+
+Supported chips:
+
+ * Maxim MAX127
+
+ Prefix: 'max127'
+
+ Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX127-MAX128.pdf
+
+Description
+-----------
+
+The MAX127 is a multirange, 12-bit data acquisition system (DAS) providing
+8 analog input channels that are independently software programmable for
+a variety of ranges. The available ranges are {0,5V}, {0,10V}, {-5,5V}
+and {-10,10V}.
+
+The MAX127 features a 2-wire, I2C-compatible serial interface that allows
+communication among multiple devices using SDA and SCL lines.
+
+Sysfs interface
+---------------
+
+ ============== ==============================================================
+ in[0-7]_input The input voltage (in mV) of the corresponding channel.
+ RO
+
+ in[0-7]_min The lower input limit (in mV) for the corresponding channel.
+ ADC range and LSB will be updated when the limit is changed.
+ For the MAX127, it will be adjusted to -10000, -5000, or 0.
+ RW
+
+ in[0-7]_max The higher input limit (in mV) for the corresponding channel.
+ ADC range and LSB will be updated when the limit is changed.
+ For the MAX127, it will be adjusted to 0, 5000, or 10000.
+ RW
+ ============== ==============================================================