Re: [PATCH v7 0/9] coresight: ctcu: Enable byte-cntr function for TMC ETR

[Jie Gan]

On 10/13/2025 1:49 PM, Jie Gan wrote:
> The byte-cntr function provided by the CTCU device is used to count the
> trace data entering the ETR. An interrupt is triggered if the data size
> exceeds the threshold set in the BYTECNTRVAL register. The interrupt
> handler counts the number of triggered interruptions.

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> Enable both ETR0 and ETR1:
> echo 0x10000 0x10000 > /sys/bus/coresight/devices/ctcu0/irq_threshold
>
> Reset the BYTECNTR register for etr0:
> echo 0 > /sys/bus/coresight/devices/ctcu0/irq_threshold

Gentle reminder.

> Changes in V7:
> 1. rebased on tag next-20251010
> 2. updated info for sysfs node document
> Link to V6 - https://lore.kernel.org/all/20250908-enable-byte-cntr-for-tmc-v6-0-1db9e621441a@xxxxxxxxxxxxxxxx/
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