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Message-ID: <89b235bf116bae9fc573772c4f52cfc3d2d122b8.1763703573.git.adrianhoyin.ng@altera.com> Date: Fri, 21 Nov 2025 14:21:48 +0800 From: adrianhoyin.ng@...era.com To: alexandre.belloni@...tlin.com, Frank.Li@....com, linux-i3c@...ts.infradead.org, linux-kernel@...r.kernel.org Cc: adrianhoyin.ng@...era.com Subject: [PATCH v2 1/3] i3c: add sysfs entry for Device NACK Retry count From: Adrian Ng Ho Yin <adrianhoyin.ng@...era.com> Document sysfs attribute dev_nack_retry_cnt that controls the number of automatic retries performed by the DesignWare I3C controller when a target device returns a NACK Signed-off-by: Adrian Ng Ho Yin <adrianhoyin.ng@...era.com> --- Documentation/ABI/testing/sysfs-bus-i3c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-i3c b/Documentation/ABI/testing/sysfs-bus-i3c index c812ab180ff4..d75339330067 100644 --- a/Documentation/ABI/testing/sysfs-bus-i3c +++ b/Documentation/ABI/testing/sysfs-bus-i3c @@ -161,3 +161,14 @@ Contact: linux-i3c@...r.kernel.org Description: These directories are just symbolic links to /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>. + +What: /sys/bus/i3c/devices/i3c-<bus-id>/<bus-id>-<device-pid>/dev_nack_retry_count +KernelVersion: 6.18 +Contact: linux-i3c@...r.kernel.org +Description: + Expose the dev_nak_retry_count which controls the number of automatic + retries that will be performed by the controller when the target device + returns a NACK response. A value of 0 disables the automatic retries. A + max value of 3 can be configured. + + Valid values: 0-3 -- 2.49.GIT
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