From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753866AbaGIHYg (ORCPT ); Wed, 9 Jul 2014 03:24:36 -0400 Received: from metis.ext.pengutronix.de ([92.198.50.35]:48437 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751114AbaGIHYf (ORCPT ); Wed, 9 Jul 2014 03:24:35 -0400 Date: Wed, 9 Jul 2014 09:24:20 +0200 From: Uwe =?iso-8859-1?Q?Kleine-K=F6nig?= To: Stephen Boyd Cc: "linux-arm-kernel@lists.infradead.org" , "devicetree@vger.kernel.org" , Stephen Warren , Arnd Bergmann , "linux-arm-msm@vger.kernel.org" , Peter De Schrijver , Linux Kernel Mailing List , Bjorn Andersson Subject: Re: a case for a common efuse API? Message-ID: <20140709072420.GI7827@pengutronix.de> References: <53BC4DD7.20906@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <53BC4DD7.20906@codeaurora.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-SA-Exim-Connect-IP: 2001:6f8:1178:2:5054:ff:fec0:8e10 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, On Tue, Jul 08, 2014 at 01:00:23PM -0700, Stephen Boyd wrote: > On MSM chips we have some efuses (called qfprom) where we store things > like calibration data, speed bins, etc. I don't have something constructive to say here, just want to point out that on efm32 there is something similar. It's called "Device Information (DI) Page" and contains "calibration values, a unique identification number and other useful data". Currently it is unused in mainline, but in my tree I access it directly to determine cpu type (part number, part family number and Production ID), flash and ram size, and the calibration settings for the ADC. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |