From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Wed, 12 Nov 2014 14:37:27 +0100 Subject: [PATCH V2 1/1] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator In-Reply-To: <1415746906-20835-2-git-send-email-merker@debian.org> References: <1415539714-7652-1-git-send-email-merker@debian.org> <1415746906-20835-1-git-send-email-merker@debian.org> <1415746906-20835-2-git-send-email-merker@debian.org> Message-ID: <20141112133727.GO14919@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 > Acked-by: Hans de Goede Merged, thanks. Maxime -- Maxime Ripard, Free Electrons Embedded Linux, Kernel and Android engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: Digital signature URL: