[PATCH] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator

Hans de Goede hdegoede at redhat.com
Tue Nov 11 10:35:48 PST 2014


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 at redhat.com>
> 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.



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