From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752563Ab2HBMEw (ORCPT ); Thu, 2 Aug 2012 08:04:52 -0400 Received: from hqemgate04.nvidia.com ([216.228.121.35]:10199 "EHLO hqemgate04.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751634Ab2HBMEv (ORCPT ); Thu, 2 Aug 2012 08:04:51 -0400 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Thu, 02 Aug 2012 05:04:51 -0700 Message-ID: <501A69CA.2070507@nvidia.com> Date: Thu, 2 Aug 2012 17:21:38 +0530 From: Laxman Dewangan User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.13) Gecko/20101208 Thunderbird/3.1.7 MIME-Version: 1.0 To: Mark Brown 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 References: <1343906193-8309-1-git-send-email-ldewangan@nvidia.com> <20120802114046.GK29157@opensource.wolfsonmicro.com> In-Reply-To: <20120802114046.GK29157@opensource.wolfsonmicro.com> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 02 August 2012 05:10 PM, Mark Brown wrote: > On Thu, Aug 02, 2012 at 04:46:33PM +0530, Laxman Dewangan wrote: > >> +static const unsigned int tps6586x_sys_voltages[] = { >> + 5000000, >> +}; > 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)