From: "Rob Herring (Arm)" <robh@kernel.org>
To: Leo Yan <leo.yan@arm.com>
Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
Mike Leach <mike.leach@arm.com>,
Michal Simek <michal.simek@amd.com>,
coresight@lists.linaro.org, linux-arm-msm@vger.kernel.org,
Wei Xu <xuwei5@hisilicon.com>,
Bjorn Andersson <andersson@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
James Clark <james.clark@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Konrad Dybcio <konradybcio@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>
Subject: Re: [PATCH 1/5] dt-bindings: arm: coresight: Limit static replicator to atclk
Date: Mon, 5 Oct 2026 12:40:43 -0500 [thread overview]
Message-ID: <179122204306.1272624.8336607920043307135.robh@kernel.org> (raw)
In-Reply-To: <20261002-arm_coresight_hi3660_remove_dynamic_funnel_clocks-v1-1-c3edca1c480b@arm.com>
On Fri, 02 Oct 2026 16:07:20 +0100, Leo Yan wrote:
> Static replicators have no programmable registers and need no APB
> programming clock.
>
> The Zynq clock controller registers dbg_trc and dbg_apb and calls
> clk_prepare_enable() for each gate the bootloader left on. This does not
> depend on the CoreSight nodes' clock references, so removing the unused
> consumer entries leaves this protection intact.
>
> Keep atclk optional for SoCs that need to control the trace datapath.
> The unchanged driver still accepts legacy firmware that supplies
> apb_pclk, atclk, or both by name.
>
> Assisted-by: Codex:gpt-6
> Signed-off-by: Leo Yan <leo.yan@arm.com>
> ---
> .../bindings/arm/arm,coresight-static-replicator.yaml | 11 ++---------
> 1 file changed, 2 insertions(+), 9 deletions(-)
>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
next prev parent reply other threads:[~2026-10-05 17:40 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-02 15:07 [PATCH 0/5] arm: coresight: Clean up funnel and replicator clocks Leo Yan
2026-10-02 15:07 ` [PATCH 1/5] dt-bindings: arm: coresight: Limit static replicator to atclk Leo Yan
2026-10-05 17:40 ` Rob Herring (Arm) [this message]
2026-10-02 15:07 ` [PATCH 2/5] dt-bindings: arm: coresight: Allow atclk for static funnel Leo Yan
2026-10-05 17:41 ` Rob Herring (Arm)
2026-10-02 15:07 ` [PATCH 3/5] arm64: dts: hisilicon: Drop PCLK from static CoreSight links Leo Yan
2026-10-02 15:07 ` [PATCH 4/5] ARM: dts: zynq: Use dynamic CoreSight funnel and trim clocks Leo Yan
2026-10-02 15:07 ` [PATCH 5/5] ARM: dts: qcom: apq8064: Drop PCLK from static replicator Leo Yan
2026-10-02 15:21 ` Dmitry Baryshkov
2026-10-02 15:33 ` Leo Yan
2026-10-02 16:05 ` Dmitry Baryshkov
2026-10-05 14:47 ` Leo Yan
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