From patchwork Tue Mar 14 21:56:09 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andi Shyti X-Patchwork-Id: 663179 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 580B2C7618D for ; Tue, 14 Mar 2023 21:58:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229456AbjCNV6E (ORCPT ); Tue, 14 Mar 2023 17:58:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229447AbjCNV6D (ORCPT ); Tue, 14 Mar 2023 17:58:03 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 537D73B3ED; Tue, 14 Mar 2023 14:58:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DF3C061A02; Tue, 14 Mar 2023 21:58:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C062CC433D2; Tue, 14 Mar 2023 21:58:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1678831081; bh=FKDGeVBRwaxoOWMBCt8fO3bP4w/Sb6a/4zz73HfW2GM=; h=From:To:Cc:Subject:Date:From; b=Js33LhEUeTfXfH9hZTAVw07WzJTPANlJ7RUdDjxkyxPUSkPT7HEVGPdRYwyUc5ldg bwRPkCAI8QwyGCUyIXNbzn3DE3kEwkc8/7EduQn4uC/IItbgAs+u7lmQautBt4Dejn fdED3Bs80W+2WsscQ9OD3JQS9L9l6UKspUeKOhUQ77/SrjAhcQHtFccdbPhk79ug+O uSQsQNOFyuM4403yFnyWg5Grc1yUvmnpJ/r3LPzhhPedwnT2Hvv4suAojKJewTZQDF FMB4oPr2/eDWi5SMzCwXjWf10pqRdwNWcQAMnbZlzmpI+8sNZHshuhV28E6oUEGCyN L9bLORqYy1gnA== From: Andi Shyti To: linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Wolfram Sang , Rob Herring , Krzysztof Kozlowski , Chris Packham , Ryan Chen , Andi Shyti Subject: [PATCH v4 0/3] Add the clock stretching i2c property Date: Tue, 14 Mar 2023 22:56:09 +0100 Message-Id: <20230314215612.23741-1-andi.shyti@kernel.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Hello, fter a discussion between Krzysztof and Ryan[1], it has become apparent that the i2c binding is lacking the definition of a property that needs to be added at a more generic level. This property is also used by the mpc i2c controller, which has been updated in the second patch. The DTS schema change has been sent as github pull reqest[2][3]. Thanks Krzysztof and Chris for the reviews. Thank you, Andi [1] https://lore.kernel.org/all/c41ee6b5-ddb4-1253-de54-a295b3bab2cc@linaro.org/ [2] https://github.com/devicetree-org/dt-schema/pull/102 [3] https://github.com/devicetree-org/dt-schema/pull/103 Changelog ========= v3 -> v4: - Replaced "i2c-scl-clk-low-timeout-ms" with "i2c-scl-clk-low-timeout-us". Use microseconds instead of milliseconds. - Add tags from Chris. v2 -> v3: - Chris recommended to use of_property_read_u32() instead of of_get_property(). Because there were two use of it I added the suggested cleanup in a separate patch. v1 -> v2: - Removed the binding patch and send through a different channel - To ensure back compatibility, which was broken in v1, the legacy "fsl,timeout" has not been removed and marked as deprecated. In the driver the that property is checked anyway as a fallback in case the main i2c-scl-clk-low-timeout-ms is missing. Andi Shyti (3): dt-bindings: i2c: mpc: Mark "fsl,timeout" as deprecated i2c: mpc: Use of_property_read_u32 instead of of_get_property i2c: mpc: Use i2c-scl-clk-low-timeout-ms i2c property .../devicetree/bindings/i2c/i2c-mpc.yaml | 3 +- drivers/i2c/busses/i2c-mpc.c | 35 ++++++++++++------- 2 files changed, 25 insertions(+), 13 deletions(-)