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 BF5E6C07E9C for ; Sun, 4 Jul 2021 23:23:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A88E6613B1 for ; Sun, 4 Jul 2021 23:23:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234610AbhGDXYw (ORCPT ); Sun, 4 Jul 2021 19:24:52 -0400 Received: from mail.kernel.org ([198.145.29.99]:57068 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234359AbhGDXPF (ORCPT ); Sun, 4 Jul 2021 19:15:05 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id B31FB613F1; Sun, 4 Jul 2021 23:12:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1625440341; bh=oELBDiCkfRqdOuU0PT4sHdy7R3CRpNSQfTPY0Vfv2u0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g4M2n6Isumsgp0aP4ODSaBGUMIAVVH5WmitpQH6O8M9y1SwndZNnWRw8KhxIjo7Z9 GxlLoyLs/9Pfjcw0DooNXWFf3k8xg4Xj1YuKzT19TmKJo7+WlYpw6nzR+8KA2ZvDtA 5U3hbEAG6472wBZ0lY+yPMXkkfMkvI5e9tHA6GgXwvA55lfj3P9ksLikyRdF9E7UMW fn055FzXvYfZqLUAPnmgegHC2UadKRCiWorWBbXMm9SC/nKgSeAtqNzBEh5+ZmtqFe 8rtC5fsR2CLpE+90EreJFRt8R4a97D3LjbVRzICwaOeVdlG601vp5JFt6G5zqytCns OwZlerTzgcwwA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Axel Lin , Mark Brown , Sasha Levin Subject: [PATCH AUTOSEL 4.9 20/20] regulator: da9052: Ensure enough delay time for .set_voltage_time_sel Date: Sun, 4 Jul 2021 19:11:55 -0400 Message-Id: <20210704231155.1491795-20-sashal@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210704231155.1491795-1-sashal@kernel.org> References: <20210704231155.1491795-1-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 9ececfef42d6..bd91c95f73e0 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