Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda

Source file repositories/reference/linux-study-clean/Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda

File Facts

System
Linux kernel
Corpus path
Documentation/ABI/testing/sysfs-bus-coresight-devices-tpda
Extension
[no extension]
Size
3260 bytes
Lines
70
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: Documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

What:		/sys/bus/coresight/devices/<tpda-name>/trig_async_enable
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Enable/disable cross trigger synchronization sequence interface.

What:		/sys/bus/coresight/devices/<tpda-name>/trig_flag_ts_enable
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Enable/disable cross trigger FLAG packet request interface.

What:		/sys/bus/coresight/devices/<tpda-name>/trig_freq_enable
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Enable/disable cross trigger FREQ packet request interface.

What:		/sys/bus/coresight/devices/<tpda-name>/freq_ts_enable
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Enable/disable the timestamp for all FREQ packets.

What:		/sys/bus/coresight/devices/<tpda-name>/cmbchan_mode
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Configure the CMB/MCMB channel mode for all enabled ports.
		Value 0 means raw channel mapping mode. Value 1 means channel pair marking mode.

What:		/sys/bus/coresight/devices/<tpda-name>/global_flush_req
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Set global (all ports) flush request bit. The bit remains set until a
		global flush request sequence completes.

What:		/sys/bus/coresight/devices/<tpda-name>/syncr_mode
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Set mode the of the syncr counter.
		mode 0 - COUNT[11:0] value represents the approximate number of bytes moved between two ASYNC packet requests
		mode 1 - the bits COUNT[11:7] are used as a power of 2. for example, we could insert an async packet every 8K
		data by writing a value 13 to the COUNT[11:7] field.

What:		/sys/bus/coresight/devices/<tpda-name>/syncr_count
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Set value the of the syncr counter.
		Range: 0-4095

What:		/sys/bus/coresight/devices/<tpda-name>/port_flush_req
Date:		December 2025
KernelVersion:	6.20
Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Tao Zhang <tao.zhang@oss.qualcomm.com>, Jie Gan <jie.gan@oss.qualcomm.com>
Description:
		(RW) Configure the bit i to requests a flush operation of port i on the TPDA.
		The requested bit(s) remain set until the flush request completes.

Annotation

Implementation Notes