From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753628AbbLKMIo (ORCPT ); Fri, 11 Dec 2015 07:08:44 -0500 Received: from sauhun.de ([89.238.76.85]:43233 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751937AbbLKMIn (ORCPT ); Fri, 11 Dec 2015 07:08:43 -0500 Date: Fri, 11 Dec 2015 13:08:32 +0100 From: Wolfram Sang To: Bartosz Golaszewski Cc: linux-i2c , LKML Subject: Re: [RESEND PATCH v2 0/9] eeprom: at24: at24cs series serial number read Message-ID: <20151211120831.GA2742@katana> References: <1449051926-21918-1-git-send-email-bgolaszewski@baylibre.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="opJtzjQTFsWo+cga" Content-Disposition: inline In-Reply-To: <1449051926-21918-1-git-send-email-bgolaszewski@baylibre.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --opJtzjQTFsWo+cga Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Dec 02, 2015 at 11:25:17AM +0100, Bartosz Golaszewski wrote: > Chips from the at24cs EEPROM series have an additional read-only memory area > containing a factory pre-programmed serial number. In order to access it, a > dummy write must be executed before reading the serial number bytes. Can't you instantiate a read-only EEPROM on this second address? Or a seperate driver attaching to this address? What is the advantage of having this in at24? --opJtzjQTFsWo+cga Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAEBAgAGBQJWary/AAoJEBQN5MwUoCm2MvcP/3NEKZJb7+rXxYbK1nej7OY0 gC1zNsJ9XGwrKoDz74/qzPNnasPKiKMxXdRTFcjs5Ydi1YvR+qEglm0lcnDQwUg6 pzhDgjRzTiJC0ilULTHhrRXJ8MjaYF+3fCSSI5dlIKWP49HR/5PbEWnnp33jpGDp VDbBoYW/naTKHbUTaneG0BzcCIapRw7MRRYVx/wHyXKyx9kpDHvebA4uceScllcS dghcd7RmBGvj2+So0eRX8DvsrYvlL14TSDkWuLPOcVrk/vzjbj6cYvi6o+kCV4zK K1apOJc5x37V6umk80GL3w58L7Gol4g0k53svZBcVPhNhQrXWwAPSMTa07to5tuZ gopL6nv5Qd86a6k0T+0L2g+QFdX+F4DWRhBm34csO/V/SjLCT72pV8hCgO4+u3dU NbruiX4QPjlsNbkCerZWMS5zGIWC5u9eMu/DQiqvVuK5Dy+RT5nFQLmwSGZs5/CV /d93H3ZYYzre2wy7/3wqibRDd1i7Kh8n8cL6HzCgeDTzYh6FbMN+x+KJzK/CP9u8 rRSkyrs4P4Ux1nBK3IWqaBWtESMoiEpDPqLaab3lNkzXrVpuehHnaaAyvgs9QyDW +3QGpJwoC03hOOE2zMb+p9zrzNjkzTR5v+MOKGGKDB93zcploEaCGzqsVYpjFgwC YA0q41s3Jp4sOw5E36Qs =Og6a -----END PGP SIGNATURE----- --opJtzjQTFsWo+cga--