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

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Message-ID: <20201221090244.GA53991@dell>
Date:   Mon, 21 Dec 2020 09:02:44 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org,
        Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/4] mfd: qca639x: add support for QCA639x powerup
 sequence

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.

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

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
Linaro.org │ Open source software for Arm SoCs
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