From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kevin Hilman Subject: Re: [PATCH] ARM64: dts: Mediatek: mt8173-evb: fix access MMC fail issue Date: Mon, 22 Feb 2016 16:32:54 -0800 Message-ID: <7h37skw9jd.fsf@baylibre.com> References: <1455861643-24307-1-git-send-email-eddie.huang@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1455861643-24307-1-git-send-email-eddie.huang-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> (Eddie Huang's message of "Fri, 19 Feb 2016 14:00:43 +0800") Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Eddie Huang Cc: Matthias Brugger , Henry Chen , Chaotian Jing , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org List-Id: linux-mediatek@lists.infradead.org Eddie Huang writes: > MT8173 E1 chip has one bug that if turn off USB power domain, vcore > power will also be off, thus cause modules using vcore power domain > fail, like MMC. The E1 chip only found on MT8173-evb board and this > board only has E1 chip, so implement this as a board specific > workaround. > > Pwrapper use vcore power, so add pwrapper using USB power domain to > keep USB power domain not to zero and disabled. > > Signed-off-by: Eddie Huang Tested-by: Kevin Hilman I verified that this gets my mt8173-evb booting again when I enable MMC support. Thanks, Kevin -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html From mboxrd@z Thu Jan 1 00:00:00 1970 From: khilman@baylibre.com (Kevin Hilman) Date: Mon, 22 Feb 2016 16:32:54 -0800 Subject: [PATCH] ARM64: dts: Mediatek: mt8173-evb: fix access MMC fail issue In-Reply-To: <1455861643-24307-1-git-send-email-eddie.huang@mediatek.com> (Eddie Huang's message of "Fri, 19 Feb 2016 14:00:43 +0800") References: <1455861643-24307-1-git-send-email-eddie.huang@mediatek.com> Message-ID: <7h37skw9jd.fsf@baylibre.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Eddie Huang writes: > MT8173 E1 chip has one bug that if turn off USB power domain, vcore > power will also be off, thus cause modules using vcore power domain > fail, like MMC. The E1 chip only found on MT8173-evb board and this > board only has E1 chip, so implement this as a board specific > workaround. > > Pwrapper use vcore power, so add pwrapper using USB power domain to > keep USB power domain not to zero and disabled. > > Signed-off-by: Eddie Huang Tested-by: Kevin Hilman I verified that this gets my mt8173-evb booting again when I enable MMC support. Thanks, Kevin From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756441AbcBWAc6 (ORCPT ); Mon, 22 Feb 2016 19:32:58 -0500 Received: from mail-pa0-f48.google.com ([209.85.220.48]:33088 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755859AbcBWAc4 (ORCPT ); Mon, 22 Feb 2016 19:32:56 -0500 From: Kevin Hilman To: Eddie Huang Cc: Matthias Brugger , Henry Chen , Chaotian Jing , , , , , Subject: Re: [PATCH] ARM64: dts: Mediatek: mt8173-evb: fix access MMC fail issue Organization: BayLibre References: <1455861643-24307-1-git-send-email-eddie.huang@mediatek.com> Date: Mon, 22 Feb 2016 16:32:54 -0800 In-Reply-To: <1455861643-24307-1-git-send-email-eddie.huang@mediatek.com> (Eddie Huang's message of "Fri, 19 Feb 2016 14:00:43 +0800") Message-ID: <7h37skw9jd.fsf@baylibre.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Eddie Huang writes: > MT8173 E1 chip has one bug that if turn off USB power domain, vcore > power will also be off, thus cause modules using vcore power domain > fail, like MMC. The E1 chip only found on MT8173-evb board and this > board only has E1 chip, so implement this as a board specific > workaround. > > Pwrapper use vcore power, so add pwrapper using USB power domain to > keep USB power domain not to zero and disabled. > > Signed-off-by: Eddie Huang Tested-by: Kevin Hilman I verified that this gets my mt8173-evb booting again when I enable MMC support. Thanks, Kevin