From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753575Ab0IJMcf (ORCPT ); Fri, 10 Sep 2010 08:32:35 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:52509 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753511Ab0IJMcd (ORCPT ); Fri, 10 Sep 2010 08:32:33 -0400 Date: Fri, 10 Sep 2010 15:31:19 +0300 From: Felipe Balbi To: venki kaps Cc: "Balbi, Felipe" , Ming Lei , "greg@kroah.com" , "linux-usb@vger.kernel.org" , "linux-omap@vger.kernel.org" , "linux-kernel@vger.kernel.org" , David Brownell , Felipe Balbi , "Gadiyar, Anand" Subject: Re: [PATCH] USB: otg: twl4030: fix phy initialization(v1) Message-ID: <20100910123119.GB31230@legolas.emea.dhcp.ti.com> Reply-To: balbi@ti.com References: <20100909060110.GC9098@legolas.emea.dhcp.ti.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Thu, Sep 09, 2010 at 12:28:27PM -0500, venki kaps wrote: >one thing i have not understood, why it requires to power down when >the device is booted without >a USB cable? why would the phy be powered up for no use ? >After booting, just attach/detach the usb cable, then i have not seen >any issue with power numbers in off mode, RETENTION and active states. that's because if you boot without cable the phy is left alive, consuming power for nothing. -- balbi