Subject: [linux-sunxi] [PATCH 1/4] ARM: dts: sunxi: Add regulator-boot-on to usb host port regulator nodes

From: [email-masked] (Maxime Ripard)
Date: Tue, 23 Jun 2015 09:16:46 +0200

On Mon, Jun 22, 2015 at 10:28:16AM +0200, Hans de Goede wrote:
> Hi,
> 
> On 22-06-15 02:30, Julian Calaby wrote:
> >Hi Hans,
> >
> >On Sun, Jun 21, 2015 at 1:40 AM, Hans de Goede <[email-masked]> 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.

What happens if the property is set but the regulator is not actually
enabled?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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