linux-kernel - Re: [PATCH/RFT v2 12/17] USB: ochi-da8xx: Use a regulator for vbus/overcurrent

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Message-ID: <CAKXjFTNb3TRFRtrJoWKomETkzv1o5XhjSj54z-dFdZUi3oAFsA@mail.gmail.com>
Date:   Tue, 25 Oct 2016 12:52:23 +0200
From:   Axel Haslam <ahaslam@...libre.com>
To:     Sekhar Nori <nsekhar@...com>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Johan Hovold <johan@...nel.org>, robh+dt@...nel.org,
        Alan Stern <stern@...land.harvard.edu>,
        Kevin Hilman <khilman@...libre.com>,
        Sergei Shtylyov <sshtylyov@...mvista.com>,
        David Lechner <david@...hnology.com>,
        manjunath.goudar@...aro.org, Mark Brown <broonie@...nel.org>,
        Alexandre Bailon <abailon@...libre.com>,
        linux-usb@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH/RFT v2 12/17] USB: ochi-da8xx: Use a regulator for vbus/overcurrent

On Tue, Oct 25, 2016 at 12:43 PM, Sekhar Nori <nsekhar@...com> wrote:
> On Monday 24 October 2016 10:16 PM, ahaslam@...libre.com wrote:
>> From: Axel Haslam <ahaslam@...libre.com>
>>
>> Currently, the da8xx ohci driver uses a set of gpios and callbacks in
>> board files to handle vbus and overcurrent irqs form the power supply.
>> However, this does not play nice when moving to a DT based boot were
>> we wont have board files.
>>
>> Instead of requesting and handling the gpio, use the regulator framework
>> to take care of enabling and disabling vbus power. This has the benefit
>> that we dont need to pass any more platform data to the driver:
>>
>> These will be handled by the regulator framework:
>> set_power   ->  regulator_enable/regulator_disable
>> get_power   ->  regulator_is_enabled
>> get_oci     ->  regulator_get_mode
>> ocic_notify ->  regulator notification
>>
>> We can keep the default potpgt and use the regulator start delay instead:
>> potpgt      -> regulator startup delay time
>>
>> The hawk board does not have a GPIO/OVERCURRENT gpio to control vbus,
>> (they should not have been decleared/reserved) so, just remove those
>> definitions from the hwk board file.
>>
>> Signed-off-by: Axel Haslam <ahaslam@...libre.com>
>> ---
>>  arch/arm/mach-davinci/board-da830-evm.c     |  97 ++++++++----------------
>>  arch/arm/mach-davinci/board-omapl138-hawk.c |  96 +-----------------------
>>  arch/arm/mach-davinci/include/mach/da8xx.h  |   2 +-
>>  arch/arm/mach-davinci/usb-da8xx.c           |   3 +-
>>  drivers/usb/host/ohci-da8xx.c               | 111 ++++++++++++++++++----------
>>  include/linux/platform_data/usb-davinci.h   |  19 -----
>>  6 files changed, 105 insertions(+), 223 deletions(-)
>
> Can you separate out the driver enhancement from the platform
> (mach-davinci) changes? They need to go through different trees.
>

Ok, i will do that,  (it might require intermediate code to have
the driver working on each patch)

> Thanks,
> Sekhar
>
>