linux-kernel - Re: [PATCH v2 00/14] power: sequencing: extend WCN driver to support WCN399x device

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Message-ID: <hnuhw23po45mpla76b7z3ppflrrh6ksgcpay42lh6dcuou5usq@e45oapvn37n6>
Date: Tue, 6 Jan 2026 18:09:54 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...nel.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Jeff Johnson <jjohnson@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Manivannan Sadhasivam <mani@...nel.org>, Vinod Koul <vkoul@...nel.org>,
        Balakrishna Godavarthi <quic_bgodavar@...cinc.com>,
        Matthias Kaehlcke <mka@...omium.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-wireless@...r.kernel.org, ath10k@...ts.infradead.org,
        linux-pm@...r.kernel.org, Krzysztof Kozlowski <krzk@...nel.org>,
        Bartosz Golaszewski <bartosz.golaszewski@....qualcomm.com>,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: Re: [PATCH v2 00/14] power: sequencing: extend WCN driver to support
 WCN399x device

On Tue, Jan 06, 2026 at 03:01:10AM +0200, Dmitry Baryshkov wrote:
> Qualcomm WCN3950, WCN3988 and WCN399x families of WiFi/BT chips preceed
> the later WCN / QCA devices, but they still incorporate a very simple
> PMU on die. It controls internal on-chip power networks, but, most
> importantly, it also requires a certain start-up procedure (first bring
> up VDD_IO, then bring up other voltages). In order to further unify code
> supporting different families of QCA / WCN chips and in order to
> maintain the required power up sequence, properly represent these chips
> in DTs and modify drivers to use power sequencing for these chips.
> 
> Backwards compatibility with the existing DTs is retained by keeping the
> regulator&clock code in the drivers as a fallback.
> 
> As a part of the series I've converted only several boards, verifying
> that all known instances of WCN39xx family works (fixing the issues
> meanwhile). The rest of devices might follow the pattern later.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
> Changes in v2:
> - Split the WCN39xx PMU schema from the qcom,qca6390-pmu.yaml
>   (Krzysztof)
> - Expanded the comment in the WiFi driver (Bartosz)
> - Changed vddrfa1p3-supply to vddrf-supply.
> - Link to v1: https://lore.kernel.org/r/20251231-wcn3990-pwrctl-v1-0-1ff4d6028ad5@oss.qualcomm.com
> 
> ---
> Dmitry Baryshkov (14):
>       regulator: dt-bindings: qcom,wcn3990-pmu: describe PMUs on WCN39xx
>       Bluetooth: qca: enable pwrseq support for WCN39xx devices
>       Bluetooth: qca: fix ROM version reading on WCN3998 chips
>       wifi: ath10k: snoc: support powering on the device via pwrseq
>       power: sequencing: qcom-wcn: add support for WCN39xx

>       arm64: dts: qcom: qrb4210-rb2: Fix UART3 wakeup IRQ storm
>       arm64: dts: qcom: sdm845-db845c: drop CS from SPIO0
>       arm64: dts: qcom: sdm845-db845c: specify power for WiFi CH1
>       arm64: dts: qcom: sm8150: add uart13

Note for the Bjorn: I'd ask to merge these DT patches in this cycle,
while merging the rest of the patches only in the next cycle after
landing all PMU-related driver changes. If it helps, I can submit the
patches above separately.

>       arm64: dts: qcom: qrb2210-rb1: describe WiFi/BT properly
>       arm64: dts: qcom: qrb4210-rb2: describe WiFi/BT properly
>       arm64: dts: qcom: sda660-ifc6560: describe WiFi/BT properly
>       arm64: dts: qcom: sdm845-db845c: describe WiFi/BT properly
>       arm64: dts: qcom: sm8150-hdk: describe WiFi/BT properly

-- 
With best wishes
Dmitry