From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ee0-x233.google.com (mail-ee0-x233.google.com [IPv6:2a00:1450:4013:c00::233]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 82BBC2C009A for ; Wed, 13 Nov 2013 06:23:29 +1100 (EST) Received: by mail-ee0-f51.google.com with SMTP id t10so3395868eei.10 for ; Tue, 12 Nov 2013 11:23:24 -0800 (PST) Received: from [192.168.0.100] (adsl-ull-89-173.40-151.net24.it. [151.40.173.89]) by mx.google.com with ESMTPSA id k7sm71073731eeg.13.2013.11.12.11.23.21 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 12 Nov 2013 11:23:22 -0800 (PST) From: neorf3k Content-Type: text/plain; charset=windows-1252 Subject: Problem reading and programming memory location... Message-Id: <985685C7-0122-4D45-96D1-4412E9774A5D@gmail.com> Date: Tue, 12 Nov 2013 20:23:20 +0100 To: Linux Ppc Dev List Dev List Mime-Version: 1.0 (Mac OS X Mail 7.0 \(1822\)) List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , we have tried to read and program an 8bit register with 32bit address. = we have mapped it with: ioremap, kmalloc etc=85 and then using: outb, = iowrite8 etc.. but when we write to it, the value doesn=92t change=85 = with other memory location is ok. That is an 8 bit register, located at 0x10020000 in a mpc5200b = architecture. we are using kernel 2.6.33.=20 what could be? Thank you Lorenzo=