linux-kernel - Re: [PATCH 13/18] power: supply: bq24190_charger: Export 5V boost converter as regulator

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Date:   Tue, 8 Aug 2017 11:57:13 -0700
From:   Liam Breck <liam@...workimprov.net>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        Sebastian Reichel <sre@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        platform-driver-x86@...r.kernel.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-i2c@...r.kernel.org, Tony Lindgren <tony@...mide.com>,
        linux-pm@...r.kernel.org, devel@...verdev.osuosl.org
Subject: Re: [PATCH 13/18] power: supply: bq24190_charger: Export 5V boost
 converter as regulator

On Tue, Aug 8, 2017 at 2:00 AM, Hans de Goede <hdegoede@...hat.com> wrote:
> Hi,
>
> On 08-08-17 10:39, Liam Breck wrote:
>>
>> Hi Hans,
>>
>> On Sun, Aug 6, 2017 at 5:35 AM, Hans de Goede <hdegoede@...hat.com> wrote:
>>>
>>> Register the 5V boost converter as a regulator named
>>> "regulator-bq24190-usb-vbus". Note the name includes "bq24190" because
>>> the bq24190 family is also used on ACPI devices where there are no
>>> device-tree phandles, so regulator_get will fallback to the name and thus
>>> it must be unique on the system.
>>
>>
>> What we're enabling here is 5V boost for otg host mode, not vbus
>> generally, so maybe the name should indicate that...
>>
>> regulator-bq24190-usb-5volt
>> regulator-bq24190-usb-host
>> regulator-bq24190-usb-otg-5v
>
>
> I picked vbus because that gets used a lot already in similar cases,
> but I agree that we should probably come up with a better name.
>
> I like "regulator-bq24190-usb-otg-5v", shall I use that for v2?

There is this upstream, with "otg-vbus":
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=61274eff0ddee8f10deaa5f79085e981db52930a

Related search:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/?qt=grep&q=otg+regulator

I don't think it needs a "regulator-" prefix, and maybe the driver
name is a suffix. We could also recommend the "regulator-name" value
for OTG here:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/Documentation/devicetree/bindings/regulator/regulator.txt

a. Make the above patch wrong :-)
usb-otg-5v (generic)
usb-otg-5v-bq2419x (specific)

b. Follow a weak precedent
otg-vbus (generic)
otg-vbus-bq2419x (specific)