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| author | Carl Lee <carl.lee@amd.com> | 2026-09-07 15:58:32 +0800 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2026-10-18 09:35:06 -0700 |
| commit | bc8c5bfc10896374182c1f20201446fc1abecdda (patch) | |
| tree | 47abb70f0e8f4f9db95897c3aacee6d801fcc4d3 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 241956880457326df28bd8a2a4f14fa8aba4f0ff (diff) | |
| download | linux-bc8c5bfc10896374182c1f20201446fc1abecdda.tar.gz linux-bc8c5bfc10896374182c1f20201446fc1abecdda.zip | |
hwmon: (pmbus/ltc4286) Add writable shunt_resistor sysfs attribute
The LTC4286/LTC4287 driver uses rsense to scale current and power
telemetry. rsense is board-specific rather than a fixed device
characteristic, and may differ across qualified BOM variants using the
same software image.
If rsense does not match the installed board configuration, current and
power readings are mis-scaled.
Add a writable shunt_resistor sysfs attribute so userspace can update
the board calibration value after platform identification. Initialize
rsense from shunt-resistor-micro-ohms as before (or the existing default
when absent), and validate runtime updates before recalculating the
current/power scaling coefficients.
Signed-off-by: Carl Lee <carl.lee@amd.com>
Link: https://patch.msgid.link/20260907-hwmon-pmbus-ltc4286-add-runtime-shunt-resistor-control-v2-1-5f47f7e5a1bb@amd.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions