Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) What:		/sys/bus/css/devices/.../type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) Date:		March 2008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) 		linux-s390@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) Description:	Contains the subchannel type, as reported by the hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) 		This attribute is present for all subchannel types.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) What:		/sys/bus/css/devices/.../modalias
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) Date:		March 2008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 		linux-s390@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) Description:	Contains the module alias as reported with uevents.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 		It is of the format css:t<type> and present for all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 		subchannel types.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) What:		/sys/bus/css/drivers/io_subchannel/.../chpids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) Date:		December 2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		linux-s390@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Description:	Contains the ids of the channel paths used by this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		subchannel, as reported by the channel subsystem
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		during subchannel recognition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		Note: This is an I/O-subchannel specific attribute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) Users:		s390-tools, HAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) What:		/sys/bus/css/drivers/io_subchannel/.../pimpampom
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) Date:		December 2002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) Contact:	Cornelia Huck <cornelia.huck@de.ibm.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 		linux-s390@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) Description:	Contains the PIM/PAM/POM values, as reported by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		channel subsystem when last queried by the common I/O
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		layer (this implies that this attribute is not necessarily
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 		in sync with the values current in the channel subsystem).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		Note: This is an I/O-subchannel specific attribute.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) Users:		s390-tools, HAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) What:		/sys/bus/css/devices/.../driver_override
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Date:		June 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) Contact:	Cornelia Huck <cohuck@redhat.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 		linux-s390@vger.kernel.org
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) Description:	This file allows the driver for a device to be specified. When
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		specified, only a driver with a name matching the value written
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		to driver_override will have an opportunity to bind to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		device. The override is specified by writing a string to the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 		driver_override file (echo vfio-ccw > driver_override) and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		may be cleared with an empty string (echo > driver_override).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		This returns the device to standard matching rules binding.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		Writing to driver_override does not automatically unbind the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		device from its current driver or make any attempt to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		automatically load the specified driver.  If no driver with a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		matching name is currently loaded in the kernel, the device
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 		will not bind to any driver.  This also allows devices to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 		opt-out of driver binding using a driver_override name such as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 		"none".  Only a single driver may be specified in the override,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		there is no support for parsing delimiters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		Note that unlike the mechanism of the same name for pci, this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 		file does not allow to override basic matching rules. I.e.,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		the driver must still match the subchannel type of the device.