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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 5C3C6C432BE for ; Wed, 25 Aug 2021 12:47:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4740161183 for ; Wed, 25 Aug 2021 12:47:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231402AbhHYMsU (ORCPT ); Wed, 25 Aug 2021 08:48:20 -0400 Received: from mail-ua1-f50.google.com ([209.85.222.50]:40506 "EHLO mail-ua1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240915AbhHYMsT (ORCPT ); Wed, 25 Aug 2021 08:48:19 -0400 Received: by mail-ua1-f50.google.com with SMTP id y36so14388084uad.7; Wed, 25 Aug 2021 05:47:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=DZzUFmdq2anom2dMHyGc4RtISAvMnamc9GsCNK0ln/Y=; b=QE8P7Zq9EOMdLpphnzr5x27UfASjdHb3KgKTSSBZAkHmjPUx80laA0IwggxSpWM3zd PaBR82lvczg4xrwFEG3rLYkG5e9/IXB8MXCRvm8kI0PvlzU5Z5n8V/Zl7BPeA2qj8ef5 ZBbAG2C06dWSi9MCJO0wTXI0uePXIPVz+uPnnbwxH5VAZZM/FWecxNZsQSVkkYLP0CKg yPIcCwl3QG0nt09HrbxM2u3msaYoCquoncdcqApDuTDVostH4LkQ/BNAO+U0Ka2YEhTw njHUNYWqcJRoN+dWirWZPWqn7N2vlPQ9vQ/TyyMQs3b+mEZDqDHgqt7HZNSreNwS8UDu NJJg== X-Gm-Message-State: AOAM531jWRdE9fYC2grQ3mgTVvEd0NysLaM/2zbj8s9TE0T0f7LXb4wr Iovrsm55LAQzr47EQPYkSEhijNeeiYwjqLqDJOI= X-Google-Smtp-Source: ABdhPJy4tXEuS2V3Pan5F+TEJ1Im3XNO/x5SUh9FCa7fmIrqUxSPuHrsUlaQYpnxK7Rcc4uvFnBIJfYTXr+DwyNzgZ8= X-Received: by 2002:ab0:209a:: with SMTP id r26mr1743786uak.14.1629895653806; Wed, 25 Aug 2021 05:47:33 -0700 (PDT) MIME-Version: 1.0 References: <20210825122757.91133-1-aford173@gmail.com> In-Reply-To: <20210825122757.91133-1-aford173@gmail.com> From: Geert Uytterhoeven Date: Wed, 25 Aug 2021 14:47:21 +0200 Message-ID: Subject: Re: [PATCH] arm64: dts: renesas: beacon: Fix i2c2 speed calcuation To: Adam Ford , Wolfram Sang Cc: Linux-Renesas , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org CC Wolfram On Wed, Aug 25, 2021 at 2:28 PM Adam Ford wrote: > The desired i2c2 speed is 400KHz, but when measured on a scope, it > is incorrect. The driver can use the i2c-scl-rising-time-ns to help > calculate the proper setting to get exactly 400KHz. > > Fixes: 900d9fc3bece ("arm64: dts: renesas: beacon: Correct I2C bus speeds") > Signed-off-by: Adam Ford > > diff --git a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi > index 2692cc64bff6..987357c58390 100644 > --- a/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi > +++ b/arch/arm64/boot/dts/renesas/beacon-renesom-baseboard.dtsi > @@ -328,6 +328,7 @@ &hsusb { > &i2c2 { > status = "okay"; > clock-frequency = <400000>; > + i2c-scl-rising-time-ns = <50>; > pinctrl-0 = <&i2c2_pins>; > pinctrl-names = "default"; > > -- > 2.25.1