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| author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2015-09-22 15:47:19 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-10-04 22:28:58 +0300 |
| commit | 14cdbf041788f150ec3b323583b80bfd5775f73e (patch) | |
| tree | 1e0236ddb73b20cfd4ffa047a37dafb4bd470aa9 /Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti | |
| parent | ba82664c134ef7ab97808f09a3c5e894b0a4900d (diff) | |
| download | linux-14cdbf041788f150ec3b323583b80bfd5775f73e.tar.xz | |
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>
Diffstat (limited to 'Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti b/Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti new file mode 100644 index 000000000000..df0b24fd0218 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-intel_th-devices-pti @@ -0,0 +1,24 @@ +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. |