14cdbf0417
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>
25 lines
923 B
Plaintext
25 lines
923 B
Plaintext
What: /sys/bus/intel_th/devices/<intel_th_id>-pti/mode
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Date: June 2015
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KernelVersion: 4.3
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Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
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Description: (RW) Configure PTI output width. Currently supported values
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are 4, 8, 12, 16.
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What: /sys/bus/intel_th/devices/<intel_th_id>-pti/freerunning_clock
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Date: June 2015
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KernelVersion: 4.3
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Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
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Description: (RW) 0: PTI trace clock acts as a strobe which only toggles
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when there is trace data to send. 1: PTI trace clock is a
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free-running clock.
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What: /sys/bus/intel_th/devices/<intel_th_id>-pti/clock_divider
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Date: June 2015
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KernelVersion: 4.3
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Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
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Description: (RW) Configure PTI port clock divider:
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- 0: Intel TH clock rate,
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- 1: 1/2 Intel TH clock rate,
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- 2: 1/4 Intel TH clock rate,
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- 3: 1/8 Intel TH clock rate.
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