From patchwork Thu Jul 6 15:53:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre Yves MORDRET X-Patchwork-Id: 9828551 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E93C6602BD for ; Thu, 6 Jul 2017 15:54:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D64FA286C5 for ; Thu, 6 Jul 2017 15:54:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C4C4A28681; Thu, 6 Jul 2017 15:54:38 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 625DB28681 for ; Thu, 6 Jul 2017 15:54:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qmDUXXHF5r1kq/K73iEnMoKNsjXVXobA52wfooVHOXU=; b=pkKpexjQnUt8Qg 6if9drcSsm5jPWbG4ZniwSWJk+6q+zC4dzbfFTkO3Fi92V6VlpIQKYmdr65yrLBgEO/lfNCGH3njG fJ/Mo9/vquHWy0HrdQZ10fIIcH7U1TzIHiJITDiPlv+2g7z3yT0pPD3UuswX4nq43goX8U5VGKF8g LlA+RBjI+5UBKqcys8sGodo1dFm1hAhr2Y5QXGFO2z8RnB4wQm0jGX1Fp4/hlVP2B4Mz49M3NUCOx 5rCq4onoEz0mNJojOhMwii1zE1Eyr6Sa2XV+cTJvK1tIwND/dn1gQUiZzuua5EjKOgeRd6Mrz/g2u oW4589ebJkYLJPunr2uA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dT96y-0006pn-03; Thu, 06 Jul 2017 15:54:36 +0000 Received: from mx08-00178001.pphosted.com ([91.207.212.93] helo=mx07-00178001.pphosted.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dT96D-0005tx-70 for linux-arm-kernel@lists.infradead.org; Thu, 06 Jul 2017 15:53:53 +0000 Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx08-.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v66Fmx1W017103; Thu, 6 Jul 2017 17:53:15 +0200 Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-.pphosted.com with ESMTP id 2bhr4k811d-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Thu, 06 Jul 2017 17:53:15 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id AE20EE0; Thu, 6 Jul 2017 15:53:14 +0000 (GMT) Received: from Webmail-eu.st.com (sfhdag5node2.st.com [10.75.127.14]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 8FEC42906; Thu, 6 Jul 2017 15:53:14 +0000 (GMT) Received: from localhost (10.75.127.49) by SFHDAG5NODE2.st.com (10.75.127.14) with Microsoft SMTP Server (TLS) id 15.0.1178.4; Thu, 6 Jul 2017 17:53:14 +0200 From: Pierre-Yves MORDRET To: Wolfram Sang , Rob Herring , Mark Rutland , Maxime Coquelin , Alexandre Torgue , Russell King , , , , Subject: [PATCH v3 2/5] i2c: i2c-stm32f4: use generic definition of speed enum Date: Thu, 6 Jul 2017 17:53:03 +0200 Message-ID: <1499356386-28779-3-git-send-email-pierre-yves.mordret@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1499356386-28779-1-git-send-email-pierre-yves.mordret@st.com> References: <1499356386-28779-1-git-send-email-pierre-yves.mordret@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.49] X-ClientProxiedBy: SFHDAG5NODE2.st.com (10.75.127.14) To SFHDAG5NODE2.st.com (10.75.127.14) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-07-06_10:, , signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170706_085349_649040_19F1298F X-CRM114-Status: GOOD ( 15.72 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pierre-yves.mordret@st.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP This patch uses a more generic definition of speed enum for i2c-stm32f4 driver. Signed-off-by: M'boumba Cedric Madianga Signed-off-by: Pierre-Yves MORDRET Reviewed-by: Ludovic BARRE --- Version history: v3: v2: * None --- --- drivers/i2c/busses/i2c-stm32.h | 20 ++++++++++++++++++++ drivers/i2c/busses/i2c-stm32f4.c | 18 +++++++----------- 2 files changed, 27 insertions(+), 11 deletions(-) create mode 100644 drivers/i2c/busses/i2c-stm32.h diff --git a/drivers/i2c/busses/i2c-stm32.h b/drivers/i2c/busses/i2c-stm32.h new file mode 100644 index 0000000..dab5176 --- /dev/null +++ b/drivers/i2c/busses/i2c-stm32.h @@ -0,0 +1,20 @@ +/* + * i2c-stm32.h + * + * Copyright (C) M'boumba Cedric Madianga 2017 + * Author: M'boumba Cedric Madianga + * + * License terms: GNU General Public License (GPL), version 2 + */ + +#ifndef _I2C_STM32_H +#define _I2C_STM32_H + +enum stm32_i2c_speed { + STM32_I2C_SPEED_STANDARD, /* 100 kHz */ + STM32_I2C_SPEED_FAST, /* 400 kHz */ + STM32_I2C_SPEED_FAST_PLUS, /* 1 MHz */ + STM32_I2C_SPEED_END, +}; + +#endif /* _I2C_STM32_H */ diff --git a/drivers/i2c/busses/i2c-stm32f4.c b/drivers/i2c/busses/i2c-stm32f4.c index f9dd7e8..b81557d 100644 --- a/drivers/i2c/busses/i2c-stm32f4.c +++ b/drivers/i2c/busses/i2c-stm32f4.c @@ -27,6 +27,8 @@ #include #include +#include "i2c-stm32.h" + /* STM32F4 I2C offset registers */ #define STM32F4_I2C_CR1 0x00 #define STM32F4_I2C_CR2 0x04 @@ -90,12 +92,6 @@ #define STM32F4_I2C_MAX_FREQ 46U #define HZ_TO_MHZ 1000000 -enum stm32f4_i2c_speed { - STM32F4_I2C_SPEED_STANDARD, /* 100 kHz */ - STM32F4_I2C_SPEED_FAST, /* 400 kHz */ - STM32F4_I2C_SPEED_END, -}; - /** * struct stm32f4_i2c_msg - client specific data * @addr: 8-bit slave addr, including r/w bit @@ -159,7 +155,7 @@ static int stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev) i2c_dev->parent_rate = clk_get_rate(i2c_dev->clk); freq = DIV_ROUND_UP(i2c_dev->parent_rate, HZ_TO_MHZ); - if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD) { + if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) { /* * To reach 100 kHz, the parent clk frequency should be between * a minimum value of 2 MHz and a maximum value of 46 MHz due @@ -216,7 +212,7 @@ static void stm32f4_i2c_set_rise_time(struct stm32f4_i2c_dev *i2c_dev) * is not higher than 46 MHz . As a result trise is at most 4 bits wide * and so fits into the TRISE bits [5:0]. */ - if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD) + if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) trise = freq + 1; else trise = freq * 3 / 10 + 1; @@ -230,7 +226,7 @@ static void stm32f4_i2c_set_speed_mode(struct stm32f4_i2c_dev *i2c_dev) u32 val; u32 ccr = 0; - if (i2c_dev->speed == STM32F4_I2C_SPEED_STANDARD) { + if (i2c_dev->speed == STM32_I2C_SPEED_STANDARD) { /* * In standard mode: * t_scl_high = t_scl_low = CCR * I2C parent clk period @@ -808,10 +804,10 @@ static int stm32f4_i2c_probe(struct platform_device *pdev) udelay(2); reset_control_deassert(rst); - i2c_dev->speed = STM32F4_I2C_SPEED_STANDARD; + i2c_dev->speed = STM32_I2C_SPEED_STANDARD; ret = of_property_read_u32(np, "clock-frequency", &clk_rate); if (!ret && clk_rate >= 400000) - i2c_dev->speed = STM32F4_I2C_SPEED_FAST; + i2c_dev->speed = STM32_I2C_SPEED_FAST; i2c_dev->dev = &pdev->dev;