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=-7.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,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 DC705C433B4 for ; Thu, 8 Apr 2021 12:38:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AD55760698 for ; Thu, 8 Apr 2021 12:38:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229837AbhDHMim (ORCPT ); Thu, 8 Apr 2021 08:38:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:54876 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231420AbhDHMil (ORCPT ); Thu, 8 Apr 2021 08:38:41 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id D5AA261179; Thu, 8 Apr 2021 12:38:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1617885510; bh=gI7IQRVG/KjeWjtFz9xAONjp1agRGcNgXg+fjKKuvb8=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=f2Og5f+hYv3mMI0NeZRXkjb+OOjv5r7Qb9I+ssY9vp5fUeJSttguhq2kWJYQJli9o bCfu2ZQ/sJhYUxpe2u5JZgoalFf0uYsHnTkZ9owV8sa01Q8rtN59TB9PD7XiyFa9xm 8M/0Sf92f0DFekI70JByVHdLbt+A5jhpV1yiqraBKe1Li5OmTtVmnpE+faUIBAb5k8 SCVqmMCnHvpZgO29oIC6Tt5HjcZmxIHAWbraOn87Gj91HVGNPsLkBXbAEDF+Qyx85d DlcBHYMRRCW5DwGoigJcmkqN+x0w6b7U1lOxerwlGyIa525OZPp1qS29Uw94aWov/o IfEf6u16Izv4Q== Date: Thu, 8 Apr 2021 13:38:12 +0100 From: Mark Brown To: Vladimir Oltean Cc: linux-spi@vger.kernel.org Subject: Re: Default configuration for CS-to-SCK/SCK-to-CS delays Message-ID: <20210408123812.GB4516@sirena.org.uk> References: <20210408094548.o4uj6jzlcrnnacb4@skbuf> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="RASg3xLB4tUQ4RcS" Content-Disposition: inline In-Reply-To: <20210408094548.o4uj6jzlcrnnacb4@skbuf> X-Cookie: Editing is a rewording activity. User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org --RASg3xLB4tUQ4RcS Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Thu, Apr 08, 2021 at 12:45:48PM +0300, Vladimir Oltean wrote: > that there is any universal formula. Hence the question: is there any > default configuration that the driver can perform in order to avoid > having to put it in device tree? Something broadly proportional to the clock rate/peroid for the bus is probably going to work most of the time. --RASg3xLB4tUQ4RcS Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmBu+TMACgkQJNaLcl1U h9AzUwf+MbBrhRQyN+7n03z01X6oCMdNeMLv+ZZfyZN2LjfCutfUItRJFPq/P2Zc uYT84IZAkSnpcFzwKmpMqARFY1TaVyE4kXMyvqOAy+6aoIbKpMZB927Q6jZoLqfz d092qor9Wrp3tIgjUwO/ghP3+uoKjBnwY9DgpLABHIyONYx+eHr2BAUDNlJZXzRV Pp2OHmFrLs4CZuRp6FWwjFGthmnHGJVc7IiECO7cCOgFEEZQQl9yOAYsVu++wOxr wIE5u9spxcsZ7SG3RRXnJjh1Q38g7EXsNCclJaruJ0CNZlOoPhck5QLv0CAyW0cw 2lou0XMpXZz5GMlAFINj+UK/xWUyzg== =ytDx -----END PGP SIGNATURE----- --RASg3xLB4tUQ4RcS--