diff options
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-css')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-css | 18 |
1 files changed, 8 insertions, 10 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-css b/Documentation/ABI/testing/sysfs-bus-css index 966f8504bd7b..d4d5cfb63b90 100644 --- a/Documentation/ABI/testing/sysfs-bus-css +++ b/Documentation/ABI/testing/sysfs-bus-css @@ -1,43 +1,40 @@ What: /sys/bus/css/devices/.../type Date: March 2008 -Contact: Cornelia Huck <cornelia.huck@de.ibm.com> - linux-s390@vger.kernel.org +Contact: linux-s390@vger.kernel.org Description: Contains the subchannel type, as reported by the hardware. This attribute is present for all subchannel types. What: /sys/bus/css/devices/.../modalias Date: March 2008 -Contact: Cornelia Huck <cornelia.huck@de.ibm.com> - linux-s390@vger.kernel.org +Contact: linux-s390@vger.kernel.org Description: Contains the module alias as reported with uevents. It is of the format css:t<type> and present for all subchannel types. What: /sys/bus/css/drivers/io_subchannel/.../chpids Date: December 2002 -Contact: Cornelia Huck <cornelia.huck@de.ibm.com> - linux-s390@vger.kernel.org +Contact: linux-s390@vger.kernel.org Description: Contains the ids of the channel paths used by this subchannel, as reported by the channel subsystem during subchannel recognition. + Note: This is an I/O-subchannel specific attribute. Users: s390-tools, HAL What: /sys/bus/css/drivers/io_subchannel/.../pimpampom Date: December 2002 -Contact: Cornelia Huck <cornelia.huck@de.ibm.com> - linux-s390@vger.kernel.org +Contact: linux-s390@vger.kernel.org Description: Contains the PIM/PAM/POM values, as reported by the channel subsystem when last queried by the common I/O layer (this implies that this attribute is not necessarily in sync with the values current in the channel subsystem). + Note: This is an I/O-subchannel specific attribute. Users: s390-tools, HAL What: /sys/bus/css/devices/.../driver_override Date: June 2019 -Contact: Cornelia Huck <cohuck@redhat.com> - linux-s390@vger.kernel.org +Contact: linux-s390@vger.kernel.org Description: This file allows the driver for a device to be specified. When specified, only a driver with a name matching the value written to driver_override will have an opportunity to bind to the @@ -53,6 +50,7 @@ Description: This file allows the driver for a device to be specified. When opt-out of driver binding using a driver_override name such as "none". Only a single driver may be specified in the override, there is no support for parsing delimiters. + Note that unlike the mechanism of the same name for pci, this file does not allow to override basic matching rules. I.e., the driver must still match the subchannel type of the device. |