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Update TGU driver to the latest upstream version (#563)
Update TGU driver to the latest upstream version
2 parents e281393 + 18a8c76 commit e1d76de

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‎Documentation/ABI/testing/sysfs-bus-amba-devices-tgu‎

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What: /sys/bus/amba/devices/<tgu-name>/enable_tgu
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the enable/disable status of TGU
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Accepts only one of the 2 values - 0 or 1.
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0 : disable TGU.
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1 : enable TGU.
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What: /sys/bus/amba/devices/<tgu-name>/step[0:7]_priority[0:3]/reg[0:17]
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the sensed signal with specific step and priority for TGU.
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What: /sys/bus/amba/devices/<tgu-name>/step[0:7]_condition_decode/reg[0:3]
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the decode mode with specific step for TGU.
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What: /sys/bus/amba/devices/<tgu-name>/step[0:7]_condition_select/reg[0:3]
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the next action with specific step for TGU.
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What: /sys/bus/amba/devices/<tgu-name>/step[0:7]_timer/reg[0:1]
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the timer value with specific step for TGU.
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What: /sys/bus/amba/devices/<tgu-name>/step[0:7]_counter/reg[0:1]
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(RW) Set/Get the counter value with specific step for TGU.
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What: /sys/bus/amba/devices/<tgu-name>/reset_tgu
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Date: April 2026
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KernelVersion: 7.1
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Contact: Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
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Description:
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(Write) Write 1 to reset the dataset for TGU.

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

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This file was deleted.

Documentation/devicetree/bindings/arm/qcom,coresight-tgu.yaml renamed to Documentation/devicetree/bindings/arm/qcom,tgu.yaml

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# Copyright (c) 2025 Qualcomm Innovation Center, Inc. All rights reserved.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/arm/qcom,coresight-tgu.yaml#
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$id: http://devicetree.org/schemas/arm/qcom,tgu.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Trigger Generation Unit - TGU
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preprogrammed state/sequence and then produce a trigger or interrupt.
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2020
The primary use case of the TGU is to detect patterns or sequences on a
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given set of signals within some region to indentify the issue in time
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given set of signals within some region to identify the issue in time
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once there is abnormal behavior in the subsystem.
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maintainers:
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- Mao Jinlong <quic_jinlmao@quicinc.com>
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- Sam Chai <quic_songchai@quicinc.com>
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- Mao Jinlong <jinlong.mao@oss.qualcomm.com>
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- Songwei Chai <songwei.chai@oss.qualcomm.com>
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# Need a custom select here or 'arm,primecell' will match on lots of nodes
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select:
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properties:
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compatible:
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contains:
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enum:
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- qcom,coresight-tgu
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- qcom,tgu
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required:
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- compatible
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properties:
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compatible:
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items:
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- const: qcom,coresight-tgu
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- const: qcom,tgu
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- const: arm,primecell
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reg:
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items:
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- const: apb_pclk
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in-ports:
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$ref: /schemas/graph.yaml#/properties/ports
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additionalProperties: false
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properties:
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port:
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description:
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The port mechanism here ensures the relationship between TGU and
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TPDM, as TPDM is one of the inputs for TGU. It will allow TGU to
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function as TPDM's helper and enable TGU when the connected
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TPDM is enabled.
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$ref: /schemas/graph.yaml#/properties/port
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required:
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- compatible
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- reg
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examples:
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- |
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tgu@10b0e000 {
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compatible = "qcom,coresight-tgu", "arm,primecell";
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compatible = "qcom,tgu", "arm,primecell";
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reg = <0x10b0e000 0x1000>;
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clocks = <&aoss_qmp>;
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clock-names = "apb_pclk";
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in-ports {
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port {
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tgu_in_tpdm_swao: endpoint{
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remote-endpoint = <&tpdm_swao_out_tgu>;
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};
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};
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};
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};
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...

‎arch/arm64/configs/qcom.config‎

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CONFIG_CORESIGHT_CTCU=m
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CONFIG_CORESIGHT_DUMMY=m
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CONFIG_CORESIGHT_SOURCE_ETM4X=m
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CONFIG_CORESIGHT_TGU=m
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CONFIG_QCOM_TGU=m
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CONFIG_CORESIGHT_TPDM=m
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CONFIG_CPU_IDLE_THERMAL=y
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# CONFIG_DEBUG_INFO_REDUCED is not set

‎drivers/Makefile‎

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obj-$(CONFIG_USB4) += thunderbolt/
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obj-$(CONFIG_CORESIGHT) += hwtracing/coresight/
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obj-y += hwtracing/intel_th/
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obj-y += hwtracing/qcom/
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obj-$(CONFIG_STM) += hwtracing/stm/
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obj-$(CONFIG_HISI_PTT) += hwtracing/ptt/
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obj-y += android/

‎drivers/hwtracing/Kconfig‎

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source "drivers/hwtracing/ptt/Kconfig"
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source "drivers/hwtracing/qcom/Kconfig"
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endmenu

‎drivers/hwtracing/coresight/Kconfig‎

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module will be called coresight.
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if CORESIGHT
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config CORESIGHT_TGU
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tristate "CoreSight Trigger Generation Unit driver"
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help
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This driver provides support for Trigger Generation Unit that is
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used to detect patterns or sequences on a given set of signals.
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TGU is used to monitor a particular bus within a given region to
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detect illegal transaction sequences or slave responses. It is also
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used to monitor a data stream to detect protocol violations and to
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provide a trigger point for centering data around a specific event
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within the trace data buffer.
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config CORESIGHT_LINKS_AND_SINKS
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tristate "CoreSight Link and Sink drivers"
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help

‎drivers/hwtracing/coresight/Makefile‎

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coresight-cti-sysfs.o
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obj-$(CONFIG_ULTRASOC_SMB) += ultrasoc-smb.o
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obj-$(CONFIG_CORESIGHT_DUMMY) += coresight-dummy.o
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obj-$(CONFIG_CORESIGHT_TGU) += coresight-tgu.o
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obj-$(CONFIG_CORESIGHT_CTCU) += coresight-ctcu.o
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coresight-ctcu-y := coresight-ctcu-core.o coresight-ctcu-byte-cntr.o
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obj-$(CONFIG_CORESIGHT_KUNIT_TESTS) += coresight-kunit-tests.o

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