serial: imx: simplify some conditions related to dma
[linux/fpc-iii.git] / Documentation / ABI / testing / sysfs-firmware-opal-psr
blobcc2ece70e365749fcfde78cff8c3988eb9a509c3
1 What:           /sys/firmware/opal/psr
2 Date:           August 2017
3 Contact:        Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
4 Description:    Power-Shift-Ratio directory for Powernv P9 servers
6                 Power-Shift-Ratio allows to provide hints the firmware
7                 to shift/throttle power between different entities in
8                 the system. Each attribute in this directory indicates
9                 a settable PSR.
11 What:           /sys/firmware/opal/psr/cpu_to_gpu_X
12 Date:           August 2017
13 Contact:        Linux for PowerPC mailing list <linuxppc-dev@ozlabs.org>
14 Description:    PSR sysfs attributes for Powernv P9 servers
16                 Power-Shift-Ratio between CPU and GPU for a given chip
17                 with chip-id X. This file gives the ratio (0-100)
18                 which is used by OCC for power-capping.