From patchwork Mon Sep 21 16:27:10 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 309437 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=-14.2 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=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 47561C43468 for ; Mon, 21 Sep 2020 16:43:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0DCB7235F9 for ; Mon, 21 Sep 2020 16:43:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600706606; bh=AV4Eaj7jrOJ68D6Rsb5R/SK1Yx16OhK4Q+b+JiZaeQA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GoUaiYhjbzJ74wOS5/88n7xLeLAVAxiIF17dvUnORIYIiSSCUg6mUUZOQEWTw+DIy /JLuZ5iDPuSEnp2E0mgnEwXxxS/DbcoUZNgozW+vbWlpFP2tNjCHZXl7+t8AjD+WEW 23YJ7IHam2hld1wnBDzbqSLL3pfaN3D57JREdjFU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729337AbgIUQnW (ORCPT ); Mon, 21 Sep 2020 12:43:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:47870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729562AbgIUQnV (ORCPT ); Mon, 21 Sep 2020 12:43:21 -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 A1639235F9; Mon, 21 Sep 2020 16:43:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600706600; bh=AV4Eaj7jrOJ68D6Rsb5R/SK1Yx16OhK4Q+b+JiZaeQA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1X5/bZsFJvNVy36cVcrl9pr43Ckvhwl8bQNNP9vsdHetKEWU7BJ6q1yj6EaUYNM6A A1fmSaTEIFcozymyKodQvQniKLO8cFklW0cTZOggNPrPF/607H0Jt1WY4GfsmJP36C eoRfip/IMBGVcUNhh0kBhUC+qnH+Zb9OPJubUt1I= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vincent Whitchurch , Mark Brown , Sasha Levin Subject: [PATCH 5.8 018/118] regulator: pwm: Fix machine constraints application Date: Mon, 21 Sep 2020 18:27:10 +0200 Message-Id: <20200921162037.166382938@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200921162036.324813383@linuxfoundation.org> References: <20200921162036.324813383@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vincent Whitchurch [ Upstream commit 59ae97a7a9e1499c2070e29841d1c4be4ae2994a ] If the zero duty cycle doesn't correspond to any voltage in the voltage table, the PWM regulator returns an -EINVAL from get_voltage_sel() which results in the core erroring out with a "failed to get the current voltage" and ending up not applying the machine constraints. Instead, return -ENOTRECOVERABLE which makes the core set the voltage since it's at an unknown value. For example, with this device tree: fooregulator { compatible = "pwm-regulator"; pwms = <&foopwm 0 100000>; regulator-min-microvolt = <2250000>; regulator-max-microvolt = <2250000>; regulator-name = "fooregulator"; regulator-always-on; regulator-boot-on; voltage-table = <2250000 30>; }; Before this patch: fooregulator: failed to get the current voltage(-22) After this patch: fooregulator: Setting 2250000-2250000uV fooregulator: 2250 mV Signed-off-by: Vincent Whitchurch Link: https://lore.kernel.org/r/20200902130952.24880-1-vincent.whitchurch@axis.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- 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 638329bd0745e..62ad7c4e7e7c8 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -279,7 +279,7 @@ static int pwm_regulator_init_table(struct platform_device *pdev, return ret; } - drvdata->state = -EINVAL; + drvdata->state = -ENOTRECOVERABLE; drvdata->duty_cycle_table = duty_cycle_table; drvdata->desc.ops = &pwm_regulator_voltage_table_ops; drvdata->desc.n_voltages = length / sizeof(*duty_cycle_table);