From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1950272AbcHROgz (ORCPT ); Thu, 18 Aug 2016 10:36:55 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:37007 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1767872AbcHROM6 (ORCPT ); Thu, 18 Aug 2016 10:12:58 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Hans de Goede , Maxime Ripard Subject: [PATCH 4.7 107/186] ARM: dts: sunxi: Add a startup delay for fixed regulator enabled phys Date: Thu, 18 Aug 2016 15:58:44 +0200 Message-Id: <20160818135936.827267581@linuxfoundation.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160818135932.219369981@linuxfoundation.org> References: <20160818135932.219369981@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Hans de Goede commit fc51b632c7b047c25807023b76f3877aed19c770 upstream. It seems that recent kernels have a shorter timeout when scanning for ethernet phys causing us to hit a timeout on boards where the phy's regulator gets enabled just before scanning, which leads to non working ethernet. A 10ms startup delay seems to be enough to fix it, this commit adds a 20ms startup delay just to be safe. This has been tested on a sun4i-a10-a1000 and sun5i-a10s-wobo-i5 board, both of which have non-working ethernet on recent kernels without this fix. Signed-off-by: Hans de Goede Signed-off-by: Maxime Ripard Signed-off-by: Greg Kroah-Hartman --- arch/arm/boot/dts/sun4i-a10-a1000.dts | 1 + arch/arm/boot/dts/sun4i-a10-hackberry.dts | 1 + arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts | 1 + arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts | 1 + 4 files changed, 4 insertions(+) --- a/arch/arm/boot/dts/sun4i-a10-a1000.dts +++ b/arch/arm/boot/dts/sun4i-a10-a1000.dts @@ -84,6 +84,7 @@ regulator-name = "emac-3v3"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; + startup-delay-us = <20000>; enable-active-high; gpio = <&pio 7 15 GPIO_ACTIVE_HIGH>; }; --- a/arch/arm/boot/dts/sun4i-a10-hackberry.dts +++ b/arch/arm/boot/dts/sun4i-a10-hackberry.dts @@ -66,6 +66,7 @@ regulator-name = "emac-3v3"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; + startup-delay-us = <20000>; enable-active-high; gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>; }; --- a/arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts +++ b/arch/arm/boot/dts/sun4i-a10-jesurun-q5.dts @@ -80,6 +80,7 @@ regulator-name = "emac-3v3"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; + startup-delay-us = <20000>; enable-active-high; gpio = <&pio 7 19 GPIO_ACTIVE_HIGH>; /* PH19 */ }; --- a/arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts +++ b/arch/arm/boot/dts/sun5i-a10s-wobo-i5.dts @@ -79,6 +79,7 @@ regulator-name = "emac-3v3"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; + startup-delay-us = <20000>; enable-active-high; gpio = <&pio 0 2 GPIO_ACTIVE_HIGH>; };