From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomi Valkeinen Subject: i2c issue on Panda with DT boot, v3.10-rc4 Date: Fri, 7 Jun 2013 14:53:54 +0300 Message-ID: <51B1C9D2.6060703@ti.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="----enig2JQAIGSFAVWNSCEQPBEDN" Return-path: Received: from devils.ext.ti.com ([198.47.26.153]:57325 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752230Ab3FGLx5 (ORCPT ); Fri, 7 Jun 2013 07:53:57 -0400 Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-omap Cc: Tony Lindgren ------enig2JQAIGSFAVWNSCEQPBEDN Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi, I was testing DT boot with 3.10-rc1 and Pandaboard, and couldn't get the DVI output's EDID reading to work. Testing with i2cget and i2cdump, I see that I can read individual bytes with i2cget, but using i2cdump doesn't work, it just shows 'XX'es. The same issue is there with 3.10-rc4, although with that one I get timeouts with i2cdump, whereas there were no timeouts with -rc1. # i2cget -y 2 0x50 0x10 0x0a # i2cget -y 2 0x50 0x20 0x0f # i2cget -y 2 0x50 0x30 0x01 # i2cget -y 2 0x50 0x40 0x36 # i2cget -y 2 0x50 0x50 0x4c # i2cdump -y 2 0x50 No size specified (using byte-data access) 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: 00 [ 72.814086] omap_i2c 48060000.i2c: timeout waiting for bus read= y XX [ 73.825134] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 74.835327] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 76.097167] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 77.160736] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 78.174682] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 79.194824] omap_i2c 48060000.i2c: timeout waiting for bus ready XX [ 80.242980] omap_i2c 48060000.i2c: timeout waiting for bus ready i2cdump works fine with non-DT boot (but the i2c bus number is 3). Any ideas? Tomi ------enig2JQAIGSFAVWNSCEQPBEDN Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBAgAGBQJRscnSAAoJEPo9qoy8lh71dEgP/0t/zznzjzePwdWFb47n37yH 1Nwtk1khNi+1mYtfdDZUpFSMfegLprIQQbXIEWncy9mICZxAUiw2oMEtNUCEFYWW 7nIz/STR/ukMguPpYimi8h44aOgOy8r3Z5HZ+VwKV4slpVcHgqhMD2VB/ejryE3N k9Sft7azD+IAeSWsAXP+NRtV97Y10V7XfnShh92PKJr2idPAaah57yD8uaIypCaH FQyjo/2QnX8QoEUnl7B9bVtYf6+E5sIzoiHgw0aGJbh9tXeMhTlkh/k3CfdzkFoU JKspFAE2a5dazqaD2t3deQE00N11P0WLcSe0jOHvAECuMRlKmUq3LnQD2GLBg2gj 7VuKHMeFmXvDSqiOkfY9TuO/2kQm/b+lVSopGO2bPz4CzL9EM7WPZAupdweSCC+/ jhRUieaWVshJR3wUyPNfuFzgC0Btym1ngJcl14e6FY/8vMWKzV4BYn8xO+OUEycn z9XgialTQzcdePs/N7Pl6xkQHuXwvAz5SXCQU/gtqiBBQMrrE+qqTQwyS0p5LbCu tb1g4qCj0/JQ5W+uoiFGLLh+kAbNlbBZepP/Va7pChdgKfkUb2ikK/Hm+tb5PpoT SuBKakYe9y1Agli9RtponkvO63kp9Ybgl3dDFFq5Rdi0usAe6vFCn62BoZy6dC5e czbUpEw4akUHP+lWD7lD =b9gK -----END PGP SIGNATURE----- ------enig2JQAIGSFAVWNSCEQPBEDN--