2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-22 12:14:01 +08:00
linux-next/Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti
Alexander Shishkin 14cdbf0417 intel_th: Add PTI output driver
Parallel Trace Interface (PTI) unit is a trace output device that sends
data over a PTI port.

The driver provides interfaces to configure bus width, bus clock divider
and mode. Tracing is enabled via output device's "active" attribute.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-10-04 20:28:58 +01:00

25 lines
923 B
Plaintext

What: /sys/bus/intel_th/devices/<intel_th_id>-pti/mode
Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure PTI output width. Currently supported values
are 4, 8, 12, 16.
What: /sys/bus/intel_th/devices/<intel_th_id>-pti/freerunning_clock
Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) 0: PTI trace clock acts as a strobe which only toggles
when there is trace data to send. 1: PTI trace clock is a
free-running clock.
What: /sys/bus/intel_th/devices/<intel_th_id>-pti/clock_divider
Date: June 2015
KernelVersion: 4.3
Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Description: (RW) Configure PTI port clock divider:
- 0: Intel TH clock rate,
- 1: 1/2 Intel TH clock rate,
- 2: 1/4 Intel TH clock rate,
- 3: 1/8 Intel TH clock rate.