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[23.128.96.18]) by mx.google.com with ESMTP id x25si13306330edr.508.2020.09.17.04.28.08; Thu, 17 Sep 2020 04:28:32 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b="Ogm/0usc"; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726572AbgIQL0e (ORCPT + 99 others); Thu, 17 Sep 2020 07:26:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58466 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726185AbgIQLZs (ORCPT ); Thu, 17 Sep 2020 07:25:48 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8F564C061756; Thu, 17 Sep 2020 04:25:45 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id m6so1678816wrn.0; Thu, 17 Sep 2020 04:25:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=n7mBa3+CaabyaqB7OhdCT9CLExpPusdRJluP0asp0D0=; b=Ogm/0uscGeh7KAqkm/ldWNn0FW/9aagq7DisuImZNRkAK9HzRblbPJlWYGnmISFJH2 7HO+HlI3U6+xrL5eA2p8OlGNsh16X93j0kXa29nDk3itm7lQK2hVxKFTYBm+85aWXyE/ ZPxooKr1DdVC8+d+gdnZWTkGsvBuqPFJ5BI06Vv4/JBCUfGmfmA9+dywjd9axOeWm0Yt JI83xwNTdbZTGKHIipqYsaOdGzWunRHPZintkX9omNFWAiLk9LJ2i6y4+vLVar7ViGhC Gcnxuin6xACClSWHsSuzGbl+kHARpcCQujCLXOXdvGPkOJVq9iID6xnaM4nQxWZnLUZC gTXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=n7mBa3+CaabyaqB7OhdCT9CLExpPusdRJluP0asp0D0=; b=n+B/4eLW+HQOVzFhV2cR2xYeVz9VgznKw31jr8zDcbCVyIs9xy2kTfj5UZXZR67/Mb AhgJoQ3WnnbXJUnpVKQ4pwYn9glX+0UA0Mb31vyuaWRnaI9XHqIrfZE45CoNt+hY38th UKVZjl/MyZrrqATAXimJhEeKhyJjhYAEadonorvjwLE9mO0N8veP+MlwyMfno6I6TBlT V1oBNsJ9bpMQ0u+oMNB9HmB3wMz1Qq6WaRwYVnbkB6YQ0CVJjWskZuot1+6Wh37IIHiu Ae8GKqdB4WkDVo8otGAUO7WxVQqlCUXT9I5J0AGEC2wHI6sC3YfKixyZX2CzpSiTvwoA /z9Q== X-Gm-Message-State: AOAM533eM8nuTSH74C4Yh9n9VjHJcfDKhjmt1Xk9od1or1j6mq8EAZkW 3MAeTJU6keEZ4/tkAUhiNYU= X-Received: by 2002:a5d:6406:: with SMTP id z6mr30563305wru.133.1600341944228; Thu, 17 Sep 2020 04:25:44 -0700 (PDT) Received: from localhost ([217.111.27.204]) by smtp.gmail.com with ESMTPSA id x16sm37547473wrq.62.2020.09.17.04.25.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2020 04:25:43 -0700 (PDT) Date: Thu, 17 Sep 2020 13:25:41 +0200 From: Thierry Reding To: Dmitry Osipenko Cc: Jonathan Hunter , Laxman Dewangan , Wolfram Sang , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= , Andy Shevchenko , linux-i2c@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v7 06/34] i2c: tegra: Remove i2c_dev.clk_divisor_non_hs_mode member Message-ID: <20200917112541.GR3515672@ulmo> References: <20200908224006.25636-1-digetx@gmail.com> <20200908224006.25636-7-digetx@gmail.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="gMqNd2jlyJQcupG/" Content-Disposition: inline In-Reply-To: <20200908224006.25636-7-digetx@gmail.com> User-Agent: Mutt/1.14.6 (2020-07-11) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --gMqNd2jlyJQcupG/ Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Sep 09, 2020 at 01:39:38AM +0300, Dmitry Osipenko wrote: > The "non_hs_mode" divisor value is fixed, thus there is no need to have > the variable i2c_dev.clk_divisor_non_hs_mode struct member. Let's remove > it and move the mode selection into tegra_i2c_init() where it can be > united with the timing selection. >=20 > Reviewed-by: Micha=C5=82 Miros=C5=82aw > Signed-off-by: Dmitry Osipenko > --- > drivers/i2c/busses/i2c-tegra.c | 46 ++++++++++++++++------------------ > 1 file changed, 21 insertions(+), 25 deletions(-) >=20 > diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegr= a.c > index 720a75439e91..85ed0e02d48c 100644 > --- a/drivers/i2c/busses/i2c-tegra.c > +++ b/drivers/i2c/busses/i2c-tegra.c > @@ -250,7 +250,6 @@ struct tegra_i2c_hw_feature { > * @msg_buf_remaining: size of unsent data in the message buffer > * @msg_read: identifies read transfers > * @bus_clk_rate: current I2C bus clock rate > - * @clk_divisor_non_hs_mode: clock divider for non-high-speed modes > * @is_multimaster_mode: track if I2C controller is in multi-master mode > * @tx_dma_chan: DMA transmit channel > * @rx_dma_chan: DMA receive channel > @@ -281,7 +280,6 @@ struct tegra_i2c_dev { > size_t msg_buf_remaining; > int msg_read; > u32 bus_clk_rate; > - u16 clk_divisor_non_hs_mode; > bool is_multimaster_mode; > struct dma_chan *tx_dma_chan; > struct dma_chan *rx_dma_chan; > @@ -783,6 +781,7 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c_d= ev) > u32 val; > int err; > u32 clk_divisor, clk_multiplier; > + u32 non_hs_mode; > u32 tsu_thd; > u8 tlow, thigh; > =20 > @@ -805,24 +804,33 @@ static int tegra_i2c_init(struct tegra_i2c_dev *i2c= _dev) > if (i2c_dev->is_vi) > tegra_i2c_vi_init(i2c_dev); > =20 > - /* Make sure clock divisor programmed correctly */ > - clk_divisor =3D FIELD_PREP(I2C_CLK_DIVISOR_HSMODE, > - i2c_dev->hw->clk_divisor_hs_mode) | > - FIELD_PREP(I2C_CLK_DIVISOR_STD_FAST_MODE, > - i2c_dev->clk_divisor_non_hs_mode); > - i2c_writel(i2c_dev, clk_divisor, I2C_CLK_DIVISOR); > - > - if (i2c_dev->bus_clk_rate > I2C_MAX_STANDARD_MODE_FREQ && > - i2c_dev->bus_clk_rate <=3D I2C_MAX_FAST_MODE_PLUS_FREQ) { > + switch (i2c_dev->bus_clk_rate) { > + case I2C_MAX_STANDARD_MODE_FREQ + 1 ... I2C_MAX_FAST_MODE_PLUS_FREQ: Is there are particular reason for switching the simple conditional to a switch here? The old variant looks much easier to understand to me. 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