From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753554Ab2HBQKx (ORCPT ); Thu, 2 Aug 2012 12:10:53 -0400 Received: from opensource.wolfsonmicro.com ([80.75.67.52]:53952 "EHLO opensource.wolfsonmicro.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751349Ab2HBQKv (ORCPT ); Thu, 2 Aug 2012 12:10:51 -0400 Date: Thu, 2 Aug 2012 17:10:46 +0100 From: Mark Brown To: Laxman Dewangan Cc: "sameo@linux.intel.com" , "grant.likely@secretlab.ca" , "rob.herring@calxeda.com" , Stephen Warren , "linux-kernel@vger.kernel.org" , "linux-doc@vger.kernel.org" , "devicetree-discuss@lists.ozlabs.org" Subject: Re: [PATCH] regulator: tps6586x: add support for SYS rail Message-ID: <20120802161046.GC4537@opensource.wolfsonmicro.com> References: <1343906193-8309-1-git-send-email-ldewangan@nvidia.com> <20120802114046.GK29157@opensource.wolfsonmicro.com> <501A69CA.2070507@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <501A69CA.2070507@nvidia.com> X-Cookie: Is this really happening? User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 02, 2012 at 05:21:38PM +0530, Laxman Dewangan wrote: > On Thursday 02 August 2012 05:10 PM, Mark Brown wrote: > >Is the system rail actually regulated or is it just a nominal 5V? > >Normally it's just the raw, unregulated input switched in with FETs or > >whatever. > It is unregulated with FET. > The typical range (min-max) shows in data sheet > V(SYS) with respect to AGND1: 2.9V(min) 5.5V(max). > althoguh USB or AC have 4.30V(Min) 16.5V(max) OK, so just don't provide any of the voltage related functionality for i thtne.