Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754480Ab3H1SYt (ORCPT ); Wed, 28 Aug 2013 14:24:49 -0400 Received: from mail-oa0-f52.google.com ([209.85.219.52]:35586 "EHLO mail-oa0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752623Ab3H1SYr (ORCPT ); Wed, 28 Aug 2013 14:24:47 -0400 MIME-Version: 1.0 In-Reply-To: References: <1373416455-30358-1-git-send-email-jwerner@chromium.org> <20130710052534.GB15674@arwen.pp.htv.fi> <20130712065734.GE31802@arwen.pp.htv.fi> <20130827184447.GR3005@radagast> Date: Wed, 28 Aug 2013 11:24:46 -0700 X-Google-Sender-Auth: XrC1rFZPo9hl5X8un_AoJJvP0B4 Message-ID: Subject: Re: [PATCH] usb: phy: samsung-usb2: Toggle HSIC GPIO from device tree From: Julius Werner To: Tushar Behera Cc: Felipe Balbi , Julius Werner , LKML , "linux-usb@vger.kernel.org" , devicetree-discuss@lists.ozlabs.org, linux-samsung-soc , Vivek Gautam , Praveen Paneri , Kukjin Kim , Doug Anderson , Olof Johansson , Vincent Palatin Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 923 Lines: 17 I've tried to get the 3503 driver to work in my case for quite some time, but ultimately gave up. For me, playing around with the load order was not enough to solve all issues. When you try to build a permanent, clean solution for this, you should definitely also test the case where the hub has already been initialized and configured by firmware before the kernel booted, because that brought on another bunch of issues for me. I think it ultimately only works reliably when you first reset the hub, then reset the HSIC port on the PHY side before the USB core gets a chance to talk to it again (thus one of the drivers needs to be directly connected to and call the other). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/