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Message-Id: <20200320165303.13681-12-mathieu.poirier@linaro.org>
Date: Fri, 20 Mar 2020 10:53:02 -0600
From: Mathieu Poirier <mathieu.poirier@...aro.org>
To: gregkh@...uxfoundation.org
Cc: mike.leach@...aro.org, suzuki.poulose@....com,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v11 11/12] docs: sysfs: coresight: Add sysfs ABI documentation for CTI
From: Mike Leach <mike.leach@...aro.org>
Add API usage document for sysfs API in CTI driver.
Signed-off-by: Mike Leach <mike.leach@...aro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
---
.../testing/sysfs-bus-coresight-devices-cti | 241 ++++++++++++++++++
1 file changed, 241 insertions(+)
create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-cti
diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti b/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti
new file mode 100644
index 000000000000..9d11502b4390
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-cti
@@ -0,0 +1,241 @@
+What: /sys/bus/coresight/devices/<cti-name>/enable
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Enable/Disable the CTI hardware.
+
+What: /sys/bus/coresight/devices/<cti-name>/powered
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Indicate if the CTI hardware is powered.
+
+What: /sys/bus/coresight/devices/<cti-name>/ctmid
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Display the associated CTM ID
+
+What: /sys/bus/coresight/devices/<cti-name>/nr_trigger_cons
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Number of devices connected to triggers on this CTI
+
+What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/name
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Name of connected device <N>
+
+What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_signals
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Input trigger signals from connected device <N>
+
+What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/in_types
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Functional types for the input trigger signals
+ from connected device <N>
+
+What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_signals
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Output trigger signals to connected device <N>
+
+What: /sys/bus/coresight/devices/<cti-name>/triggers<N>/out_types
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Functional types for the output trigger signals
+ to connected device <N>
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/inout_sel
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Select the index for inen and outen registers.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/inen
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Read or write the CTIINEN register selected by inout_sel.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/outen
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Read or write the CTIOUTEN register selected by inout_sel.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/gate
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Read or write CTIGATE register.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/asicctl
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Read or write ASICCTL register.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/intack
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Write the INTACK register.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/appset
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Set CTIAPPSET register to activate channel. Read back to
+ determine current value of register.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/appclear
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Write APPCLEAR register to deactivate channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/apppulse
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Write APPPULSE to pulse a channel active for one clock
+ cycle.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/chinstatus
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Read current status of channel inputs.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/choutstatus
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) read current status of channel outputs.
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/triginstatus
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) read current status of input trigger signals
+
+What: /sys/bus/coresight/devices/<cti-name>/regs/trigoutstatus
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) read current status of output trigger signals.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_attach
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Attach a CTI input trigger to a CTM channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trigin_detach
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Detach a CTI input trigger from a CTM channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_attach
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Attach a CTI output trigger to a CTM channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_detach
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Detach a CTI output trigger from a CTM channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_enable
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Enable CTIGATE for single channel (W) or list enabled
+ channels through the gate (R).
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_gate_disable
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Disable CTIGATE for single channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_set
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Activate a single channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_clear
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Deactivate a single channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_pulse
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Pulse a single channel - activate for a single clock cycle.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trigout_filtered
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) List of output triggers filtered across all connections.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/trig_filter_enable
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Enable or disable trigger output signal filtering.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_inuse
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) show channels with at least one attached trigger signal.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_free
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) show channels with no attached trigger signals.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_sel
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (RW) Write channel number to select a channel to view, read to
+ see selected channel number.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_in
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Read to see input triggers connected to selected view
+ channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_out
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (R) Read to see output triggers connected to selected view
+ channel.
+
+What: /sys/bus/coresight/devices/<cti-name>/channels/chan_xtrigs_reset
+Date: March 2020
+KernelVersion 5.7
+Contact: Mike Leach or Mathieu Poirier
+Description: (W) Clear all channel / trigger programming.
--
2.20.1
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