Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758414AbcK3RH4 (ORCPT ); Wed, 30 Nov 2016 12:07:56 -0500 Received: from mail-wj0-f194.google.com ([209.85.210.194]:34163 "EHLO mail-wj0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758268AbcK3RHo (ORCPT ); Wed, 30 Nov 2016 12:07:44 -0500 MIME-Version: 1.0 In-Reply-To: <20161130162353.GC1441@katana> References: <1466439771-2741-1-git-send-email-cedric.madianga@gmail.com> <1466439771-2741-3-git-send-email-cedric.madianga@gmail.com> <20160722070219.GB1605@katana> <20161130162353.GC1441@katana> From: "M'boumba Cedric Madianga" Date: Wed, 30 Nov 2016 18:07:41 +0100 Message-ID: Subject: Re: [PATCH v3 2/5] i2c: Add STM32F4 I2C driver To: Wolfram Sang Cc: Wolfram Sang , Patrice Chotard , Maxime Coquelin , Rob Herring , linux@armlinux.org.uk, linux-i2c@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, alexandre.torgue@st.com Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 994 Lines: 38 Hi, 2016-11-30 17:23 GMT+01:00 Wolfram Sang : > Hi, > >> I was too busy in another project but now I am ready to complete the >> upstream of the STM32F4 I2C driver. > > Nice. > >> >> +static void stm32f4_i2c_set_periph_clk_freq(struct stm32f4_i2c_dev *i2c_dev) >> >> +{ >> >> + u32 clk_rate, cr2, freq; >> >> + >> >> + cr2 = readl_relaxed(i2c_dev->base + STM32F4_I2C_CR2); >> >> + cr2 &= ~STM32F4_I2C_CR2_FREQ_MASK; >> >> + >> >> + clk_rate = clk_get_rate(i2c_dev->clk); >> >> + freq = clk_rate / MHZ_TO_HZ; >> >> + >> >> + if (freq > STM32F4_I2C_MAX_FREQ) >> >> + freq = STM32F4_I2C_MAX_FREQ; >> >> + if (freq < STM32F4_I2C_MIN_FREQ) >> >> + freq = STM32F4_I2C_MIN_FREQ; >> > >> > clamp() to enforce the range? >> Sorry but what do you mean by "clamp()" ? > > The kernel has a clamp() function which would fit this purpose, I think. Ok I got it. I will fix it in the V4. Thanks > > Regards, > > Wolfram >