linux-kernel - Re: [PATCH 2/4] mfd: qca639x: add support for QCA639x powerup sequence

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Date:   Mon, 21 Dec 2020 17:08:44 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Lee Jones <lee.jones@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:DRM DRIVER FOR MSM ADRENO GPU" 
        <linux-arm-msm@...r.kernel.org>,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/4] mfd: qca639x: add support for QCA639x powerup sequence

Hello,

On Mon, 21 Dec 2020 at 12:02, Lee Jones <lee.jones@...aro.org> wrote:
>
> On Sun, 20 Dec 2020, Dmitry Baryshkov wrote:
>
> > Qualcomm QCA639x is a family of WiFi + Bluetooth SoCs, with BT part
> > being controlled through the UART and WiFi being present on PCIe
> > bus. Both blocks share common power sources. So add mfd device driver
> > handling power sequencing of QCA6390/1.
> >
> > Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> > ---
> >  drivers/mfd/Kconfig        |  12 +++
> >  drivers/mfd/Makefile       |   1 +
> >  drivers/mfd/qcom-qca639x.c | 168 +++++++++++++++++++++++++++++++++++++
> >  3 files changed, 181 insertions(+)
> >  create mode 100644 drivers/mfd/qcom-qca639x.c
>
> This is not an MFD, since it utilised neither the MFD API nor
> of_platform_populate() to register child devices.

It would use them if the WiFi part was not on a discoverable bus.

> Suggest you use drivers/power or similar to handle shared power
> sequencing requirements.

What about drivers/soc/qcom? Or drivers/misc?

-- 
With best wishes
Dmitry