[PATCH V2 1/1] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator

Maxime Ripard
2014-11-12T13:37:27Z

On Wed, Nov 12, 2014 at 12:01:46AM +0100, 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. Tests
> have shown that to provide a reliable PHY detection, the startup-delay
> has to be increased to at least 60000us. To have a certain safety margin
> and to cater for manufacturing variations between different boards,
> the delay gets set to 100000us as discussed on the linux-arm-kernel
> mailinglist.
>
> Signed-off-by: Karsten Merker <merker@debian.org>
> Acked-by: Hans de Goede <hdegoede@redhat.com>

Merged, thanks.

Maxime

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