From patchwork Tue Sep 1 15:09:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 310395 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=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT 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 41B6CC433E2 for ; Tue, 1 Sep 2020 16:04:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 10DA9206A5 for ; Tue, 1 Sep 2020 16:04:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976250; bh=zEVh5qL9qm/yB6jpYys63bBeSyhHRkjD+rP54dVUYwI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=de9cA6sRcxxL9baIaCDGioOF9mV/lHsFzsTxi0tjDZdinehox18E99iZJNvxPhVaI VO0Tl6lXTZEPv8mH7KtORJpJhwpwPDyPPJ4am5uJFIEwyLLMlZC8/u19zBLnlfg4dl /26/IGDxQdwlhfD/nI14uIjLgWRCujtudKMxuxHM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726913AbgIAQEF (ORCPT ); Tue, 1 Sep 2020 12:04:05 -0400 Received: from mail.kernel.org ([198.145.29.99]:55228 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728474AbgIAPmY (ORCPT ); Tue, 1 Sep 2020 11:42:24 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4123A206EB; Tue, 1 Sep 2020 15:42:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974943; bh=zEVh5qL9qm/yB6jpYys63bBeSyhHRkjD+rP54dVUYwI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0WZSiJtEYiCoB7ouazKCjk6SQ1AOSWw9R2er6QgFEmiL+noDD+rLYoFFpoU0if3qM wTdmUE4F9IU86skO5AsMQzD0nL24DZzPz/iDDF2JSX+nN8ijYcC0GH+X0I3dgvW+op qS72X7poj4jTgbqUe2LKMaPwKah/IUPE4fxS5o10= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Amelie Delaunay , Alain Volmat , Mark Brown , Sasha Levin Subject: [PATCH 5.8 120/255] spi: stm32: fix stm32_spi_prepare_mbr in case of odd clk_rate Date: Tue, 1 Sep 2020 17:09:36 +0200 Message-Id: <20200901151006.480047165@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Amelie Delaunay [ Upstream commit 9cc61973bf9385b19ff5dda4a2a7e265fcba85e4 ] Fix spi->clk_rate when it is odd to the nearest lowest even value because minimum SPI divider is 2. Signed-off-by: Amelie Delaunay Signed-off-by: Alain Volmat Link: https://lore.kernel.org/r/1597043558-29668-4-git-send-email-alain.volmat@st.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/spi/spi-stm32.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 7f2113e7b3ddc..9b90a22543fd7 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -442,7 +442,8 @@ static int stm32_spi_prepare_mbr(struct stm32_spi *spi, u32 speed_hz, { u32 div, mbrdiv; - div = DIV_ROUND_UP(spi->clk_rate, speed_hz); + /* Ensure spi->clk_rate is even */ + div = DIV_ROUND_UP(spi->clk_rate & ~0x1, speed_hz); /* * SPI framework set xfer->speed_hz to master->max_speed_hz if