linux-kernel - Re: [PATCH] phy: phy-samsung-usb2: Change phy power on/power off sequence

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Date:	Wed, 25 Jun 2014 08:53:54 +0100
From:	Daniel Drake <drake@...lessm.com>
To:	Kamil Debski <k.debski@...sung.com>
Cc:	linux-kernel@...r.kernel.org,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	linux-usb@...r.kernel.org, kishon@...com,
	Tomasz Figa <t.figa@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	gautam.vivek@...sung.com
Subject: Re: [PATCH] phy: phy-samsung-usb2: Change phy power on/power off sequence

On Tue, Jun 24, 2014 at 4:35 PM, Kamil Debski <k.debski@...sung.com> wrote:
> By reboot I guess that you mean typing "reboot" or by using SysRq magic
> and not power cycling?
>
> If so, I had experienced the same symptoms. I guess that the Ethernet
> chip is not reset properly and fails to enumerate without power cycling
> (it's nRESET pin is connected to P3V3).
>
> I found that removing regulator-always-on from buck8_reg: BUCK8 in the
> dts file fixes this problem.

Yes, that fixes the problem. Thanks!

Tested-by: Daniel Drake <drake@...lessm.com>
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