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linux-imx/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

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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.