From patchwork Thu Jun 24 22:49:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Pali_Roh=C3=A1r?= X-Patchwork-Id: 12343337 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=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,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 A4A65C49EAB for ; Thu, 24 Jun 2021 22:49:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 87A2C613AB for ; Thu, 24 Jun 2021 22:49:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232859AbhFXWwP (ORCPT ); Thu, 24 Jun 2021 18:52:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:54486 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232582AbhFXWwN (ORCPT ); Thu, 24 Jun 2021 18:52:13 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 64A646138C; Thu, 24 Jun 2021 22:49:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1624574993; bh=P00gi1Wtx+KpLLM7s98I0ogOiO2aXZ3GHASm7R/VtvA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g9bBPTgFeD0qqieH/lPBvJiObWbeFCEHUcEWkYen5KPGeK7QBzRy1NGruRfHbAyUM lX+bQ05uQYIT0QRZ4zMyZqjYItXQEeYUR3+rtYnpT9NnVRVx+Byl3tcZy/O5leYFPo RE8E72bwDLEz7/Z0tMyKk2TFo1t8ShjvnmES49GtNHlZEZg6hL8Ri4R6rv9G4TmOnx /yKi4PsdpAG8iuAr4LDnAK9ozaEN1pfuaMGe5eYdHSxz7vtR2N4zqUEeXsi3J5V0HV M1v+ns5GIsH6Zs+ZxQO0pwdXBkuv4paXjAixfKjXe0O/5JUZ9fya34MfkJa6EWVX1U wQv8Ai7t+Ahwg== Received: by pali.im (Postfix) id 87A7896D; Fri, 25 Jun 2021 00:49:51 +0200 (CEST) From: =?utf-8?q?Pali_Roh=C3=A1r?= To: Michael Turquette , Stephen Boyd , Rob Herring , Greg Kroah-Hartman Cc: Andrew Lunn , Gregory Clement , Sebastian Hesselbarth , Vladimir Vid , =?utf-8?q?Marek_Beh=C3=BAn?= , linux-clk@vger.kernel.org, linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 01/10] serial: mvebu-uart: fix calculation of clock divisor Date: Fri, 25 Jun 2021 00:49:00 +0200 Message-Id: <20210624224909.6350-2-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210624224909.6350-1-pali@kernel.org> References: <20210624224909.6350-1-pali@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org The clock divisor should be rounded to the closest value. Signed-off-by: Pali Rohár Fixes: 68a0db1d7da2 ("serial: mvebu-uart: add function to change baudrate") Cc: stable@vger.kernel.org # 0e4cf69ede87 ("serial: mvebu-uart: clarify the baud rate derivation") --- drivers/tty/serial/mvebu-uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/mvebu-uart.c b/drivers/tty/serial/mvebu-uart.c index e0c00a1b0763..f81bfdaa608c 100644 --- a/drivers/tty/serial/mvebu-uart.c +++ b/drivers/tty/serial/mvebu-uart.c @@ -463,7 +463,7 @@ static int mvebu_uart_baud_rate_set(struct uart_port *port, unsigned int baud) * makes use of D to configure the desired baudrate. */ m_divisor = OSAMP_DEFAULT_DIVISOR; - d_divisor = DIV_ROUND_UP(port->uartclk, baud * m_divisor); + d_divisor = DIV_ROUND_CLOSEST(port->uartclk, baud * m_divisor); brdv = readl(port->membase + UART_BRDV); brdv &= ~BRDV_BAUD_MASK;