a9e9dd9c6d
An ina3221 chip has three input ports. Each port is used to measure the voltage and current of its input source. The DT binding now has defined bindings for their input sources, so the driver should read these information and handle accordingly. This patch adds a new structure of input source specific information including input source label, shunt resistor value and its connection status. It exposes these labels via in[123]_label sysfs nodes upon available, and also disables those channels where there are no input source being connected. Meanwhile, it also adds in[123]_enable sysfs nodes for users to get control of three channels, and returns -ENODATA code for any sensor read according to hwmon ABI. Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
38 lines
1.5 KiB
Plaintext
38 lines
1.5 KiB
Plaintext
Kernel driver ina3221
|
|
=====================
|
|
|
|
Supported chips:
|
|
* Texas Instruments INA3221
|
|
Prefix: 'ina3221'
|
|
Addresses: I2C 0x40 - 0x43
|
|
Datasheet: Publicly available at the Texas Instruments website
|
|
http://www.ti.com/
|
|
|
|
Author: Andrew F. Davis <afd@ti.com>
|
|
|
|
Description
|
|
-----------
|
|
|
|
The Texas Instruments INA3221 monitors voltage, current, and power on the high
|
|
side of up to three D.C. power supplies. The INA3221 monitors both shunt drop
|
|
and supply voltage, with programmable conversion times and averaging, current
|
|
and power are calculated host-side from these.
|
|
|
|
Sysfs entries
|
|
-------------
|
|
|
|
in[123]_label Voltage channel labels
|
|
in[123]_enable Voltage channel enable controls
|
|
in[123]_input Bus voltage(mV) channels
|
|
curr[123]_input Current(mA) measurement channels
|
|
shunt[123]_resistor Shunt resistance(uOhm) channels
|
|
curr[123]_crit Critical alert current(mA) setting, activates the
|
|
corresponding alarm when the respective current
|
|
is above this value
|
|
curr[123]_crit_alarm Critical alert current limit exceeded
|
|
curr[123]_max Warning alert current(mA) setting, activates the
|
|
corresponding alarm when the respective current
|
|
average is above this value.
|
|
curr[123]_max_alarm Warning alert current limit exceeded
|
|
in[456]_input Shunt voltage(uV) for channels 1, 2, and 3 respectively
|