From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- Documentation/hwmon/tmp513.rst | 103 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 Documentation/hwmon/tmp513.rst (limited to 'Documentation/hwmon/tmp513.rst') diff --git a/Documentation/hwmon/tmp513.rst b/Documentation/hwmon/tmp513.rst new file mode 100644 index 0000000000..f2dfc1677a --- /dev/null +++ b/Documentation/hwmon/tmp513.rst @@ -0,0 +1,103 @@ +.. SPDX-License-Identifier: GPL-2.0 + +Kernel driver tmp513 +==================== + +Supported chips: + + * Texas Instruments TMP512 + + Prefix: 'tmp512' + + Datasheet: https://www.ti.com/lit/ds/symlink/tmp512.pdf + + * Texas Instruments TMP513 + + Prefix: 'tmp513' + + Datasheet: https://www.ti.com/lit/ds/symlink/tmp513.pdf + +Authors: + + Eric Tremblay + +Description +----------- + +This driver implements support for Texas Instruments TMP512, and TMP513. +The TMP512 (dual-channel) and TMP513 (triple-channel) are system monitors +that include remote sensors, a local temperature sensor, and a high-side current +shunt monitor. These system monitors have the capability of measuring remote +temperatures, on-chip temperatures, and system voltage/power/current +consumption. + +The temperatures are measured in degrees Celsius with a range of +-40 to + 125 degrees with a resolution of 0.0625 degree C. + +For hysteresis value, only the first channel is writable. Writing to it +will affect all other values since each channels are sharing the same +hysteresis value. The hysteresis is in degrees Celsius with a range of +0 to 127.5 degrees with a resolution of 0.5 degree. + +The driver exports the temperature values via the following sysfs files: + +**temp[1-4]_input** + +**temp[1-4]_crit** + +**temp[1-4]_crit_alarm** + +**temp[1-4]_crit_hyst** + +The driver read the shunt voltage from the chip and convert it to current. +The readable range depends on the "ti,pga-gain" property (default to 8) and the +shunt resistor value. The value resolution will be equal to 10uV/Rshunt. + +The driver exports the shunt currents values via the following sysFs files: + +**curr1_input** + +**curr1_lcrit** + +**curr1_lcrit_alarm** + +**curr1_crit** + +**curr1_crit_alarm** + +The bus voltage range is read from the chip with a resolution of 4mV. The chip +can be configurable in two different range (32V or 16V) using the +ti,bus-range-microvolt property in the devicetree. + +The driver exports the bus voltage values via the following sysFs files: + +**in0_input** + +**in0_lcrit** + +**in0_lcrit_alarm** + +**in0_crit** + +**in0_crit_alarm** + +The bus power and bus currents range and resolution depends on the calibration +register value. Those values are calculate by the hardware using those +formulas: + +Current = (ShuntVoltage * CalibrationRegister) / 4096 +Power = (Current * BusVoltage) / 5000 + +The driver exports the bus current and bus power values via the following +sysFs files: + +**curr2_input** + +**power1_input** + +**power1_crit** + +**power1_crit_alarm** + +The calibration process follow the procedure of the datasheet (without overflow) +and depend on the shunt resistor value and the pga_gain value. -- cgit v1.2.3