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=-3.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 D62C9C433E0 for ; Tue, 30 Mar 2021 18:45:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 776D561924 for ; Tue, 30 Mar 2021 18:45:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232856AbhC3Soz (ORCPT ); Tue, 30 Mar 2021 14:44:55 -0400 Received: from www.zeus03.de ([194.117.254.33]:57768 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232866AbhC3SoT (ORCPT ); Tue, 30 Mar 2021 14:44:19 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple; d=sang-engineering.com; h= date:from:to:cc:subject:message-id:references:mime-version :content-type:in-reply-to; s=k1; bh=O4VbJF+YDNgsNTzgNn0mfyiakjki ADsY05pkHFzVjsU=; b=kUI/6wuYWPvLhp7/WmUzjQsFjPaeCxmR6xbgQclkZhYV vKJO0w4YmNXdQb0/fk22a2yiv4e7M15XXg1LtaRaXwrI3CEsRTNPzC+FZAlVMA3w 6gAvw3SyqffiUnNgRkNSBWySVaGxF3oKAArFtO1qIkHkIABZZ0LYPbkuqe4ZzBo= Received: (qmail 301911 invoked from network); 30 Mar 2021 20:44:17 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 30 Mar 2021 20:44:17 +0200 X-UD-Smtp-Session: l3s3148p1@soqxYsW+eJEgAwDPXw7aAOihkzMkaJHc Date: Tue, 30 Mar 2021 20:44:17 +0200 From: Wolfram Sang To: Randy Dunlap Cc: linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org Subject: Re: [PATCH RFC/RFT 1/1] misc: add simple logic analyzer using polling Message-ID: <20210330184417.GA1001@kunai> Mail-Followup-To: Wolfram Sang , Randy Dunlap , linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-gpio@vger.kernel.org References: <20210330085655.12615-1-wsa+renesas@sang-engineering.com> <20210330085655.12615-2-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="YiEDa0DAkWCtVeE4" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org --YiEDa0DAkWCtVeE4 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > > +snipplet which analyzes an I2C bus at 400KHz on a Renesas Salvator-XS = board, >=20 > snippet Thanks! >=20 > > +the following settings are used: The isolated CPU shall be CPU1 becaus= e it is a > > +big core in a big.LITTLE setup. Because CPU1 is the default, we don't = need a > > +parameter. The bus speed is 400kHz. So, the sampling theorem says we n= eed to > > +sample at least at 800kHz. However, falling of both, SDA and SCL, in a= start >=20 > Is "falling" like a falling edge of a signal? Yes. It seems I should make it more clear, then. Thanks for the review, Randy! --YiEDa0DAkWCtVeE4 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmBjcX0ACgkQFA3kzBSg Kbad6w//X72lK6IZh0vnjMP39emDS43pbDRSr2sNWgNjt+Hfd9TF3VBu8grY79ob 7ywAAgQ7iBwCuiQbwGZNV+leIxIt7ENioZZBsMCV4OiiWHfn9LC5gCUWW2OWCqtO H5dLB+sSE5huaYqbzWO7AB0vgH1PhPdMLzJEIvkzkGpV1XcaYJMRyfLcNnUkdjFy bUI2OZZVqeWlYxmyL3ngVk7SvMO79le/2KQYQ65ZI7qaQOprvcg6AODxgqzTQdbi B54K8coC1DhaKH7XWrpZNP7nkDIVC8TmE1otTmt33WvzExdT9rlO7R3WJ2VvKbOp HCD2o4lYYGyXvN1cWAD5CcohuFS/NZRMdOjr0vvZSWOD7bqNqQ3yL0tLhCo2jB4W kUAZKozrpEZfgxFZcEnB6m94ZqcQgSoVsH3ZpIpXkTTUAU7uI4B+3unzTguAve5T jQ66PoEaLnFc+e/wjg1WK0mjL94dVFAC7noeGIwQDvXpTss/LRtAbtkVtMciU+Dq k+RdjCWmdoCVlPIDZKcXxhr3U4HbCodh7g5LITE2QZdDUteY9cZjMP1y1xRV78zd XqcjokDceNaRvStJz6s3WBGCxSj8AHeI5xuHC8LA7QfnSm/wGyH7dHQrRD6aomb/ IzPW7QPR+6tzDdVXPpP65sHJ/Ge/5v5GP2sMMsL7QDMnTwrmXKA= =wZ8q -----END PGP SIGNATURE----- --YiEDa0DAkWCtVeE4--