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=-8.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=unavailable 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 B77CFC43461 for ; Wed, 9 Sep 2020 08:44:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 357A7215A4 for ; Wed, 9 Sep 2020 08:44:10 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="TEswa85p" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726811AbgIIIoH (ORCPT ); Wed, 9 Sep 2020 04:44:07 -0400 Received: from www.zeus03.de ([194.117.254.33]:57400 "EHLO mail.zeus03.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725984AbgIIIoG (ORCPT ); Wed, 9 Sep 2020 04:44:06 -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=OoxtnzkZoIupkBbAG0Kzm95pAccL XvwPVa0TP2vBwYk=; b=TEswa85p+WsbEgR0+6Ny0R9qnJN4wf10Uh+cqJLBSd46 buFEjwODHNRLCy4YWlEewNFkEGPgzIKTXoBBEHd7ePBtDL6+9xfJJGCsoiLv+Qb6 iZ8llHxNlIEXOw7KPyK0qlVU4Z3qkORgp7SvTyGORujGnpquj9bIQuAeXe96OmY= Received: (qmail 234804 invoked from network); 9 Sep 2020 10:44:04 +0200 Received: by mail.zeus03.de with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 9 Sep 2020 10:44:04 +0200 X-UD-Smtp-Session: l3s3148p1@9Y0zdN2u+oQgAwDPXwesAAPl1NpCEY8B Date: Wed, 9 Sep 2020 10:44:03 +0200 From: Wolfram Sang To: linux-i2c@vger.kernel.org Cc: linux-renesas-soc@vger.kernel.org Subject: Re: [PATCH 1/2] i2c: rcar: improve bus busy detection Message-ID: <20200909084403.GH2272@ninjato> References: <20200829203810.1467-1-wsa+renesas@sang-engineering.com> <20200829203810.1467-2-wsa+renesas@sang-engineering.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="4C6bbPZ6c/S1npyF" Content-Disposition: inline In-Reply-To: <20200829203810.1467-2-wsa+renesas@sang-engineering.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org --4C6bbPZ6c/S1npyF Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Aug 29, 2020 at 10:38:09PM +0200, Wolfram Sang wrote: > I2C doesn't define a timeout for bus busy, so an arbitrary value like > LOOP_TIMEOUT is not a good idea. Let's use the timeout value in struct > adapter which is meant for such cases and is user-configurable (via > IOCTL). To reduce the load, wait 10us instead of 1us which is good > enough for the slow frequencies used by I2C. Finally, use the > poll_timeout helper instead of open coding it. >=20 > Signed-off-by: Wolfram Sang Applied to for-next, thanks! --4C6bbPZ6c/S1npyF Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAl9YldMACgkQFA3kzBSg KbY5tA//XIbXI1M9OoKOrgVDiRn78CBfnhF8VF/kKOYMMAH42wyd10GOYPtBVuS1 7fkpq99K4iYH0517zN+fPm6k+U9wItcjrDjWAzhqzZkmxN/c9+5WWTAEA9Cat67l /mcUiE8hiu6K/wCBBtwHyRRPtHOaRZj7HXqhshoapCCyCRnKwEwM5CR3lpIHd9Ul XQ5y/9nh/ZFO0fF0gNtAkTHOc3GdKQGSDATNFR+Rmf5P2QHUKkT+D3VEf2cCuC5P EE+wtioeyb/n0SB9U5thfRtsVs8HGyj7nggrd3SlyYYORZ+F8q8qS/jMAd5NF2HG 8cEnSH18b+IVxHTQj+5FDqD0PIX7/XY3Q3GBduJCGlWM9eqRvBHIeuIUM+PgRN6i eBYclFgLFnB+Z49bTCbQfzcFTAbgvfamimpFyE01RLXBRM6wAz3NoEn2CkgTDSy8 K+xDwM6bm2D9I25jljQpVZWq2XcawXbttnPLsNzw9kbG5ZbcHnWsmMYxcv3Q4SCt 3l0QqdmuT25IDPLa0ViZQNLySrNw6LrHy+XLnMhQ/PUklN9jNHayTYShQp/wZGZ5 W/Z9/N/ovqq3TbQSNv45+J0C9vQNLsX6lKA+G6nErq2E89ju1rajGZFYtpDzMwff qXxlavwVSuNzt5yOnQmFjOvhj/rayW/0gYIMQNAdKvCzGSngIrQ= =Jgji -----END PGP SIGNATURE----- --4C6bbPZ6c/S1npyF--