linux-kernel - Re: [PATCH 2/2] remoteproc: qcom_q6v5_wcss: use optional reset for wcss_q6_bcr

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Message-ID: <1ba66817-42e2-4c63-8a94-d2e5c9cb8c34@oss.qualcomm.com>
Date: Mon, 1 Dec 2025 12:21:16 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Alexandru Gagniuc <mr.nuke.me@...il.com>, andersson@...nel.org,
        mathieu.poirier@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-remoteproc@...r.kernel.org,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] remoteproc: qcom_q6v5_wcss: use optional reset for
 wcss_q6_bcr_reset

On 11/29/25 2:32 AM, Alexandru Gagniuc wrote:
> The "wcss_q6_bcr_reset" is not used on IPQ8074, and IPQ6018. Use
> devm_reset_control_get_optional_exclusive() for this reset so that
> probe() does not fail on platforms where it is not used.
> 
> Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
> ---

This reset is not even used (or documented anywhere).. the closest
I can find is "wcss_q6_reset" in qcom,q6v5.txt, initially documented
in:

Fixes: 3a3d4163e0bf ("remoteproc: qcom: Introduce Hexagon V5 based WCSS driver")

which claims it was made for.. IPQ8074

Peeking at the GCC driver, this reset is most likely present as
GCC_WCSS_Q6_BCR

Konrad