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@oss.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