From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailrelay005.isp.belgacom.be (mailrelay005.isp.belgacom.be [195.238.6.171]) by ozlabs.org (Postfix) with ESMTP id 7C4E2DE477 for ; Fri, 25 Jul 2008 01:52:45 +1000 (EST) From: Laurent Pinchart To: Kumar Gala Subject: Re: [PATCHv2] cpm_uart: Fix break generation Date: Thu, 24 Jul 2008 17:52:39 +0200 References: <200806261338.19358.laurentp@cse-semaphore.com> <200807241621.58719.laurentp@cse-semaphore.com> In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart6878992.uEPgOi7UoZ"; protocol="application/pgp-signature"; micalg=pgp-sha1 Message-Id: <200807241752.42543.laurentp@cse-semaphore.com> Cc: scottwood@freescale.com, linuxppc-dev@ozlabs.org, linux-serial@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --nextPart6878992.uEPgOi7UoZ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Thursday 24 July 2008, Kumar Gala wrote: >=20 > On Jul 24, 2008, at 9:21 AM, Laurent Pinchart wrote: >=20 > > When generating a break condition on a serial port, the CPM must be =20 > > told beforehand how long the break should be. Unfortunately, this =20 > > information is not available through the current serial break handling > > API. This patch works around the problem by requesting a 32767 characte= rs > > break followed by a 0 characters break after the requested duration. The > > CPM will stop the first break when the second one is requested. This mi= ght > > not work with future CPM revisions. >=20 > What do you mean by future CPM revision? Do you mean QE? I was thinking about minor revisions of the CPM2 silicon as described in ht= tp://www.freescale.com/files/32bit/doc/app_note/AN2291.pdf =2D-=20 Laurent Pinchart CSE Semaphore Belgium Chaussee de Bruxelles, 732A B-1410 Waterloo Belgium T +32 (2) 387 42 59 =46 +32 (2) 387 42 75 --nextPart6878992.uEPgOi7UoZ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) iEYEABECAAYFAkiIpUoACgkQ8y9gWxC9vpcd8QCgzP/gG1JAui9gBkJYZ7weLSYW DKQAoLaXn+17pop5qEiejRBSCZmhjQOa =Z40o -----END PGP SIGNATURE----- --nextPart6878992.uEPgOi7UoZ--