From mboxrd@z Thu Jan 1 00:00:00 1970 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=-20.4 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,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A75B1C11F6D for ; Sun, 4 Jul 2021 23:23:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8AC74613F3 for ; Sun, 4 Jul 2021 23:23:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235001AbhGDXZQ (ORCPT ); Sun, 4 Jul 2021 19:25:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:57578 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231300AbhGDXPR (ORCPT ); Sun, 4 Jul 2021 19:15:17 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 5E669613F1; Sun, 4 Jul 2021 23:12:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625440361; bh=D3D6XPU+wiqf0XUCXJoRP0z41QiQhDjJilDE8NdqY+Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L519fOgKF5q9EHY3s8JDjbYvXHhVKAnSQ3qLjb/WCFOzo6gxV3GcTozZe3q3suj4U zyqnTxR+VUhV6oTyuFDjcrQFCjiAlIAuHEzoZd71/XaLzLtueXQXmRTvx7CGI9QPEZ jeQ3bFmv+68ksbTG5ybGayLw8AsXVFWnKrlDmN/v6Jf48/BnznHmEkFCbQI5jiT8Z3 GXC0decqp3GZ9xjOAXhFsur3fKUknGT+11vze6YF9ty4PTskAC1LjQsAWkKGT0Zc5a suc7Bu0zQdY+vI7Ryd0l7tpT6sxBA39F3CeO1SnjiAgeKyIA4dDHLlrellAf39mUMB tf4QdbXFtwtAw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Axel Lin , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 4.4 15/15] regulator: da9052: Ensure enough delay time for .set_voltage_time_sel Date: Sun, 4 Jul 2021 19:12:21 -0400 Message-Id: <20210704231222.1492037-15-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210704231222.1492037-1-sashal@kernel.org> References: <20210704231222.1492037-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Axel Lin [ Upstream commit a336dc8f683e5be794186b5643cd34cb28dd2c53 ] Use DIV_ROUND_UP to prevent truncation by integer division issue. This ensures we return enough delay time. Also fix returning negative value when new_sel < old_sel. Signed-off-by: Axel Lin Link: https://lore.kernel.org/r/20210618141412.4014912-1-axel.lin@ingics.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/da9052-regulator.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c index 12a25b40e473..fa9cb7df79de 100644 --- a/drivers/regulator/da9052-regulator.c +++ b/drivers/regulator/da9052-regulator.c @@ -258,7 +258,8 @@ static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev, case DA9052_ID_BUCK3: case DA9052_ID_LDO2: case DA9052_ID_LDO3: - ret = (new_sel - old_sel) * info->step_uV / 6250; + ret = DIV_ROUND_UP(abs(new_sel - old_sel) * info->step_uV, + 6250); break; } -- 2.30.2