ad352acbb9
The sysFS "status" entry conveys a wealth of information about the status of the HW but goes agains the sysFS rule of one topic per file. This patch rectify the situation by adding read-only entries for each of the field formaly displayed by "status". The ABI documentation is kept up to date. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
80 lines
3.2 KiB
Plaintext
80 lines
3.2 KiB
Plaintext
What: /sys/bus/coresight/devices/<memory_map>.etb/enable_sink
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Date: November 2014
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KernelVersion: 3.19
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (RW) Add/remove a sink from a trace path. There can be multiple
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source for a single sink.
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ex: echo 1 > /sys/bus/coresight/devices/20010000.etb/enable_sink
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What: /sys/bus/coresight/devices/<memory_map>.etb/trigger_cntr
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Date: November 2014
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KernelVersion: 3.19
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (RW) Disables write access to the Trace RAM by stopping the
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formatter after a defined number of words have been stored
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following the trigger event. The number of 32-bit words written
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into the Trace RAM following the trigger event is equal to the
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value stored in this register+1 (from ARM ETB-TRM).
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rdp
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Defines the depth, in words, of the trace RAM in powers of
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2. The value is read directly from HW register RDP, 0x004.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/sts
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB status register. The value
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is read directly from HW register STS, 0x00C.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rrp
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB RAM Read Pointer register
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that is used to read entries from the Trace RAM over the APB
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interface. The value is read directly from HW register RRP,
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0x014.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/rwp
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB RAM Write Pointer register
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that is used to sets the write pointer to write entries from
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the CoreSight bus into the Trace RAM. The value is read directly
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from HW register RWP, 0x018.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/trg
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Similar to "trigger_cntr" above except that this value is
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read directly from HW register TRG, 0x01C.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ctl
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB Control register. The value
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is read directly from HW register CTL, 0x020.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ffsr
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB Formatter and Flush Status
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register. The value is read directly from HW register FFSR,
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0x300.
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What: /sys/bus/coresight/devices/<memory_map>.etb/mgmt/ffcr
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Date: March 2016
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KernelVersion: 4.7
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Contact: Mathieu Poirier <mathieu.poirier@linaro.org>
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Description: (R) Shows the value held by the ETB Formatter and Flush Control
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register. The value is read directly from HW register FFCR,
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0x304.
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