serial: imx: simplify some conditions related to dma
[linux/fpc-iii.git] / Documentation / ABI / testing / sysfs-class-stm_source
blob57b8dd39bbf7e6beddfd198fe3cbeed1ad47514f
1 What:           /sys/class/stm_source/<stm_source>/stm_source_link
2 Date:           June 2015
3 KernelVersion:  4.3
4 Contact:        Alexander Shishkin <alexander.shishkin@linux.intel.com>
5 Description:
6                 stm_source device linkage to stm device, where its tracing data
7                 is directed. Reads return an existing connection or "<none>" if
8                 this stm_source is not connected to any stm device yet.
9                 Write an existing (registered) stm device's name here to
10                 connect that device. If a device is already connected to this
11                 stm_source, it will first be disconnected.