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From: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Maxime Ripard
	<maxime.ripard-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Cc: Karsten Merker <merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>,
	Ian Campbell
	<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	dev-3kdeTeqwOZ9EV1b7eY7vFQ@public.gmane.org
Subject: Re: [PATCH] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator
Date: Tue, 11 Nov 2014 19:35:48 +0100	[thread overview]
Message-ID: <54625704.7030100@redhat.com> (raw)
In-Reply-To: <20141111173435.GJ14919@lukather>

Hi,

On 11/11/2014 06:34 PM, Maxime Ripard wrote:
> On Sun, Nov 09, 2014 at 10:05:26PM +0100, Hans de Goede wrote:
>> Hi,
>>
>> On 11/09/2014 02:28 PM, Karsten Merker wrote:
>>> On the LeMaker Banana Pi, probing the external ethernet PHY connected
>>> to the SoC's internal GMAC module sometimes fails.  The PHY power
>>> supply is handled via a GPIO-controlled regulator, and the existing
>>> regulator startup-delay of 50000us is too short to make sure that the
>>> PHY is always fully powered up when it is queried by phylib.  To
>>> guarantee a reliable PHY detection, the startup-delay has to be
>>> increased to 60000us.
>>
>> We should probably just increase it to 100000us to be safe, otherwise:
>>
>> Acked-by: Hans de Goede <hdegoede-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> 
> Soooo, should I merge it or will there be a v2?

It might be easiest if you merge it with the delay increased to 100000 us,
assuming you agree that it is a good idea to add some extra safety margin.

Regards,

Hans

  reply	other threads:[~2014-11-11 18:35 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-09 13:28 [PATCH] ARM: dts: Fix failing ethernet PHY detection on the LeMaker Banana Pi Karsten Merker
     [not found] ` <1415539714-7652-1-git-send-email-merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-11-09 13:28   ` [PATCH] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator Karsten Merker
     [not found]     ` <1415539714-7652-2-git-send-email-merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-11-09 21:05       ` Hans de Goede
     [not found]         ` <545FD716.5060305-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2014-11-11 17:34           ` Maxime Ripard
2014-11-11 18:35             ` Hans de Goede [this message]
2014-11-11 23:01   ` [PATCH V2 0/1] ARM: dts: Fix failing ethernet PHY detection on the LeMaker Banana Pi Karsten Merker
     [not found]     ` <1415746906-20835-1-git-send-email-merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-11-11 23:01       ` [PATCH V2 1/1] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator Karsten Merker
     [not found]         ` <1415746906-20835-2-git-send-email-merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org>
2014-11-12 13:37           ` Maxime Ripard

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