linux-stable/Documentation/hwmon/bcm54140.rst
Michael Walle 4406d36dfd net: phy: bcm54140: add hwmon support
The PHY supports monitoring its die temperature as well as two analog
voltages. Add support for it.

Signed-off-by: Michael Walle <michael@walle.cc>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-04-22 12:14:18 -07:00

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1.2 KiB
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.. SPDX-License-Identifier: GPL-2.0-only
Broadcom BCM54140 Quad SGMII/QSGMII PHY
=======================================
Supported chips:
* Broadcom BCM54140
Datasheet: not public
Author: Michael Walle <michael@walle.cc>
Description
-----------
The Broadcom BCM54140 is a Quad SGMII/QSGMII PHY which supports monitoring
its die temperature as well as two analog voltages.
The AVDDL is a 1.0V analogue voltage, the AVDDH is a 3.3V analogue voltage.
Both voltages and the temperature are measured in a round-robin fashion.
Sysfs entries
-------------
The following attributes are supported.
======================= ========================================================
in0_label "AVDDL"
in0_input Measured AVDDL voltage.
in0_min Minimum AVDDL voltage.
in0_max Maximum AVDDL voltage.
in0_alarm AVDDL voltage alarm.
in1_label "AVDDH"
in1_input Measured AVDDH voltage.
in1_min Minimum AVDDH voltage.
in1_max Maximum AVDDH voltage.
in1_alarm AVDDH voltage alarm.
temp1_input Die temperature.
temp1_min Minimum die temperature.
temp1_max Maximum die temperature.
temp1_alarm Die temperature alarm.
======================= ========================================================