From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753995AbcCMIQH (ORCPT ); Sun, 13 Mar 2016 04:16:07 -0400 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:56516 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752010AbcCMIP5 (ORCPT ); Sun, 13 Mar 2016 04:15:57 -0400 From: Mark Brown To: Laxman Dewangan , Mark Brown Cc: linux-kernel@vger.kernel.org In-Reply-To: Message-Id: Date: Sun, 13 Mar 2016 15:15:47 +0700 X-SA-Exim-Connect-IP: 2a01:348:6:8808:7e7a:91ff:fede:4a45 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "regulator: pwm: Fix calculation of voltage-to-duty cycle" to the regulator tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: Yes (on mezzanine.sirena.org.uk) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch regulator: pwm: Fix calculation of voltage-to-duty cycle has been applied to the regulator tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >>From 1aaab34878ac14efede3f0e737b99447745699d1 Mon Sep 17 00:00:00 2001 From: Laxman Dewangan Date: Tue, 8 Mar 2016 16:23:21 +0530 Subject: [PATCH] regulator: pwm: Fix calculation of voltage-to-duty cycle With following equation for calculating voltage_to_duty_cycle_percentage 100 - (((req_uV * 100) - (min_uV * 100)) / diff); we get 0% for max_uV and 100% for min_uV. Correcting this to ((req_uV * 100) - (min_uV * 100)) / diff; to get proper duty cycle. Signed-off-by: Laxman Dewangan Signed-off-by: Mark Brown --- drivers/regulator/pwm-regulator.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 3aca067b9901..4d8eb3506dc8 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -115,7 +115,7 @@ static int pwm_voltage_to_duty_cycle_percentage(struct regulator_dev *rdev, int int max_uV = rdev->constraints->max_uV; int diff = max_uV - min_uV; - return 100 - (((req_uV * 100) - (min_uV * 100)) / diff); + return ((req_uV * 100) - (min_uV * 100)) / diff; } static int pwm_regulator_get_voltage(struct regulator_dev *rdev) -- 2.7.0