On 8/13/24 4:30 AM, Mariusz Tkaczyk wrote: > diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci > index 93d22b779d20..62154e549414 100644 > --- a/Documentation/ABI/testing/sysfs-bus-pci > +++ b/Documentation/ABI/testing/sysfs-bus-pci > @@ -563,3 +563,12 @@ Description: > indication is usually presented as one or two LEDs blinking at > 4 Hz frequency: > https://en.wikipedia.org/wiki/International_Blinking_Pattern_Interpretation > + > + PCI Firmware Specification r3.3 sec 4.7 defines a DSM interface > + to facilitate shared access by operating system and platform > + firmware to a device's NPEM registers. The kernel will use > + this DSM interface where available, instead of accessing NPEM > + registers directly. The DSM interface does not support the > + enclosure-specific indications "specific0" to "specific7", > + hence the corresponding led class devices are unavailable if s/led/LED/ please. > + the DSM interface is used. -- ~Randy
