linux-kernel - Re: [PATCH v4 0/3] Introduce USB charger support in USB phy

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Date:   Wed, 9 Aug 2017 13:34:18 +0800
From:   Baolin Wang <baolin.wang@...aro.org>
To:     Felipe Balbi <balbi@...nel.org>,
        Greg KH <gregkh@...uxfoundation.org>,
        Sebastian Reichel <sre@...nel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Cc:     Jun Li <jun.li@....com>, Peter Chen <peter.chen@...escale.com>,
        Mark Brown <broonie@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        NeilBrown <neilb@...e.com>, patches@...nsource.wolfsonmicro.com,
        Baolin Wang <baolin.wang@...aro.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        USB <linux-usb@...r.kernel.org>,
        device-mainlining@...ts.linuxfoundation.org,
        LKML <linux-kernel@...r.kernel.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH v4 0/3] Introduce USB charger support in USB phy

Hi Felipe,

On 27 July 2017 at 13:14, Baolin Wang <baolin.wang@...aro.org> wrote:
> Currently the Linux kernel does not provide any standard integration of this
> feature that integrates the USB subsystem with the system power regulation
> provided by PMICs meaning that either vendors must add this in their kernels
> or USB gadget devices based on Linux (such as mobile phones) may not behave
> as they should. Thus provide a standard USB charger support in USB phy core
> for doing this in kernel.
>
> Now introduce one user with wm831x_power to support and test the usb charger.
> In future we will also cnvert below power drivers:
> drivers/power/supply/axp288_charger.c
> drivers/power/supply/bq24190_charger.c
> drivers/power/supply/charger-manager.c
> drivers/power/supply/qcom_smbb.c
>
> Changes since v3:
>  - Bail out errors when failed to find usb phy for wm831x_power driver.
> Changes since v2:
>  - Add DT binding documentation for wm831x_power driver.
>  - Change 'usb-phy' as one optional property for wm831x_power driver.
> Changes since v1:
>  - Fix building errors.

Do you have any comments about usb charger support in usb phy core? Thanks.

>
> Baolin Wang (3):
>   include: uapi: usb: Introduce USB charger type and state definition
>   usb: phy: Add USB charger support
>   power: wm831x_power: Support USB charger current limit management
>
>  Documentation/devicetree/bindings/mfd/wm831x.txt |    1 +
>  drivers/power/supply/wm831x_power.c              |   72 ++++++
>  drivers/usb/phy/phy.c                            |  272 ++++++++++++++++++++++
>  include/linux/usb/phy.h                          |   49 ++++
>  include/uapi/linux/usb/charger.h                 |   31 +++
>  5 files changed, 425 insertions(+)
>  create mode 100644 include/uapi/linux/usb/charger.h
>
> --
> 1.7.9.5
>



-- 
Baolin.wang
Best Regards