From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH 1/4] ARM: dts: sunxi: Add regulator-boot-on
 to usb host port regulator nodes
Date: Mon, 22 Jun 2015 10:28:16 +0200
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To: Julian Calaby <julian.calaby-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: Maxime Ripard <maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>, "Mailing List, Arm" <linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>, devicetree <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, linux-sunxi <linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
List-Id: devicetree@vger.kernel.org

Hi,

On 22-06-15 02:30, Julian Calaby wrote:
> Hi Hans,
>
> On Sun, Jun 21, 2015 at 1:40 AM, Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> wrote:
>> u-boot will have turned on the power to the usb host ports, so mark them
>> as regulator-boot-on, this stops the power on the ports from temporarily
>> getting turned off during boot, causing issues with e.g. usb powered
>> harddisks.
>
> Stupid question: shouldn't u-boot set this property?

We could make u-boot set this property but that will require a lot of code on
u-boot's side which is simply not there atm. And traditionally this property
is is simply a part of the dts files as shipped with the kernel.

Regards,

Hans