From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hans de Goede Subject: Re: [PATCH] ARM: dts: sunxi: Banana Pi: increase startup-delay for the GMAC PHY regulator Date: Sun, 09 Nov 2014 22:05:26 +0100 Message-ID: <545FD716.5060305@redhat.com> References: <1415539714-7652-1-git-send-email-merker@debian.org> <1415539714-7652-2-git-send-email-merker@debian.org> Reply-To: linux-sunxi-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <1415539714-7652-2-git-send-email-merker-8fiUuRrzOP0dnm+yROfE0A@public.gmane.org> List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , To: Karsten Merker , Maxime Ripard , Ian Campbell Cc: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, dev-3kdeTeqwOZ9EV1b7eY7vFQ@public.gmane.org List-Id: devicetree@vger.kernel.org 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 Regards, Hans