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authorAlexander Shishkin <alexander.shishkin@linux.intel.com>2015-09-22 15:47:14 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-04 22:28:58 +0300
commit39f4034693b7c7bd1fe4cb58c93259d600f55561 (patch)
treedebe2c6087fd2d996dbdc6accd799522f2de25c3 /Documentation/ABI/testing/sysfs-bus-intel_th-output-devices
parente3e5a3d3da3e68ac5a7ab0278dffec8353ca8174 (diff)
downloadlinux-39f4034693b7c7bd1fe4cb58c93259d600f55561.tar.xz
intel_th: Add driver infrastructure for Intel(R) Trace Hub devices
Intel(R) Trace Hub (TH) is a set of hardware blocks (subdevices) that produce, switch and output trace data from multiple hardware and software sources over several types of trace output ports encoded in System Trace Protocol (MIPI STPv2) and is intended to perform full system debugging. For these subdevices, we create a bus, where they can be discovered and configured by userspace software. This patch creates this bus infrastructure, three types of devices (source, output, switch), resource allocation, some callback mechanisms to facilitate communication between the subdevices' drivers and some common sysfs attributes. 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-output-devices')
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diff --git a/Documentation/ABI/testing/sysfs-bus-intel_th-output-devices b/Documentation/ABI/testing/sysfs-bus-intel_th-output-devices
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+What: /sys/bus/intel_th/devices/<intel_th_id>-<device><id>/active
+Date: June 2015
+KernelVersion: 4.3
+Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+Description: (RW) Writes of 1 or 0 enable or disable trace output to this
+ output device. Reads return current status.
+
+What: /sys/bus/intel_th/devices/<intel_th_id>-msc<msc-id>/port
+Date: June 2015
+KernelVersion: 4.3
+Contact: Alexander Shishkin <alexander.shishkin@linux.intel.com>
+Description: (RO) Port number, corresponding to this output device on the
+ switch (GTH).