From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E623FC433E1 for ; Thu, 20 Aug 2020 17:14:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AEA22208E4 for ; Thu, 20 Aug 2020 17:14:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597943669; bh=0zK3Lt+m6ZwamOH/bqQ5uwj6Q5PlpMUmoiCi8NwHY8Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=J7c+UbTkDoQkI6UO/CalsworcggEe6i2bumTRo2E4HVNNh2U/Hx+HARjVwjeEKH0r SN6NoK4mA9WOVhJDMdu9qXl+lRvu8D5f5ien9wLRjpfzKpQaEGHR75nOdchcAFgwnm h6Ngske0t1Xr6acvKV2L2YTOiwiH2E5PiwQxQaW4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730400AbgHTROC (ORCPT ); Thu, 20 Aug 2020 13:14:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:56628 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728410AbgHTRNc (ORCPT ); Thu, 20 Aug 2020 13:13:32 -0400 Received: from localhost (cpc102320-sgyl38-2-0-cust46.18-2.cable.virginm.net [82.37.168.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A7773208B3; Thu, 20 Aug 2020 17:13:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597943610; bh=0zK3Lt+m6ZwamOH/bqQ5uwj6Q5PlpMUmoiCi8NwHY8Q=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=u4fOlswe5a5q0z42oEZLkWuq7Vs4AOZryh17Uq1QQ71iExivXJHkhFj+P5AbvONWB xQPzPKFtBSSKe4JWKCvnzSBVMlWszH/jQd7E7F+Xx1m6kM05mR4a3g7iLarv63UBsL 4vkVFheYqNdO/gMrpBpaY6DZP6f3QbEbFjqZQUmY= Date: Thu, 20 Aug 2020 18:12:57 +0100 From: Mark Brown To: Eddie James Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, joel@jms.id.au, bradleyb@fuzziesquirrel.com, robh+dt@kernel.org, arnd@arndb.de Subject: Re: [PATCH 2/7] spi: fsi: Fix clock running too fast Message-ID: <20200820171257.GG5854@sirena.org.uk> References: <20200820170228.42053-1-eajames@linux.ibm.com> <20200820170228.42053-3-eajames@linux.ibm.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="1XWsVB21DFCvn2e8" Content-Disposition: inline In-Reply-To: <20200820170228.42053-3-eajames@linux.ibm.com> X-Cookie: Dead? No excuse for laying off work. User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --1XWsVB21DFCvn2e8 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Aug 20, 2020 at 12:02:23PM -0500, Eddie James wrote: > From: Brad Bishop >=20 > Use a clock divider tuned to a 200MHz FSI clock. Use of the previous > divider at 200MHz results in corrupt data from endpoint devices. Ideally > the clock divider would be calculated from the FSI clock, but that > would require some significant work on the FSI driver. Presumably this divider was chosen for FSI clocks that aren't 200MHz - how will those be handled? --1XWsVB21DFCvn2e8 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAl8+rxgACgkQJNaLcl1U h9DW/Qf/b938F90Z7EgEuWYBPnb61c/NU3E60ICCbDXuBP5mOoZo1jtsF9yiB+Xu StiK9pOsuydCJHWaUl4/SRoeV3yb9+Yt5hEjCe3z87bs1D3pRxqpeuD6uz7mcxwa YHqwgcvASbc76xCCIYwS0eumwedVbNnno93kowiM5a50vY3mHVmjfoF97MyJ93aP NkxAtZsTgs2prQUf+S59jFxkciKyAEXCQQYTTUyiHzWriyKAjKqE+QFKRlKxX6d1 FXvf3bQg1rTSC/1sQzFivWhJZLAoxWFTYM7gstE/M8I78RHy2B5eAG+yAuqbvPcM xOw9SvRsLd7b9j7VcFx0Ieuf1COxXA== =TcJ3 -----END PGP SIGNATURE----- --1XWsVB21DFCvn2e8--