From patchwork Wed Jun 15 23:15:47 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Helgaas X-Patchwork-Id: 12883026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0111C43334 for ; Wed, 15 Jun 2022 23:16:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1355999AbiFOXQn (ORCPT ); Wed, 15 Jun 2022 19:16:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1352759AbiFOXQY (ORCPT ); Wed, 15 Jun 2022 19:16:24 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C20DB3135B; Wed, 15 Jun 2022 16:16:22 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5D3096199D; Wed, 15 Jun 2022 23:16:22 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 92B32C3411A; Wed, 15 Jun 2022 23:16:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1655334981; bh=mrxLuwW6VYNrbcjHq58c7unp1aMAICbpn9ly/gV4ASg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FM5K2aJkpFeURvD/3/dy2vhcGN/VarB0IaQE3Vq93OGfrK8xPLEVBfA4UtVIoh82+ 51oyRBKJnkdrhaxaJq6hzcfHqOzUdWhPR6LVAVFY281iLTIFTMOJsrqxgQmoamFPZK DkD3PC75Vr4iuidfAUxT924WHbpVp03ZvgWvXAtZwE/697yR8UAb49/ybR8YxefThh aRxaN4ulx6mJiv19xe1KxdDkSldawgOqWgpRskRvY+W3FVfe0yJqYY3uL/74MkYAYe fhORMhTEU4nQtYzvnOCmteoi94ODJLKoiInYTbKAJ6EJa/+bhhptM/p88LmoMPduXc Mh7X1va7mk+Gg== From: Bjorn Helgaas To: Richard Zhu , Lucas Stach , Rob Herring , Mark Brown , Lorenzo Pieralisi , Fabio Estevam , Francesco Dolcini Cc: linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, Bjorn Helgaas Subject: [PATCH v12 09/13] PCI: imx6: Turn off regulator when system is in suspend mode Date: Wed, 15 Jun 2022 18:15:47 -0500 Message-Id: <20220615231551.1054753-10-helgaas@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220615231551.1054753-1-helgaas@kernel.org> References: <20220615231551.1054753-1-helgaas@kernel.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Richard Zhu The driver should undo any enables it did itself. The regulator disable shouldn't be basing decisions on regulator_is_enabled(). Move the regulator_disable to the suspend function, turn off regulator when the system is in suspend mode. To keep the balance of the regulator usage counter, disable the regulator in shutdown. Link: https://lore.kernel.org/r/1655189942-12678-6-git-send-email-hongxing.z hu@nxp.com Signed-off-by: Richard Zhu Signed-off-by: Bjorn Helgaas --- drivers/pci/controller/dwc/pci-imx6.c | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 6eddd0b5f628..537b8a2e0e3b 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -670,8 +670,6 @@ static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) { - struct device *dev = imx6_pcie->pci->dev; - switch (imx6_pcie->drvdata->variant) { case IMX7D: case IMX8MQ: @@ -702,14 +700,6 @@ static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie) break; } - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { - int ret = regulator_disable(imx6_pcie->vpcie); - - if (ret) - dev_err(dev, "failed to disable vpcie regulator: %d\n", - ret); - } - /* Some boards don't have PCIe reset GPIO. */ if (gpio_is_valid(imx6_pcie->reset_gpio)) gpio_set_value_cansleep(imx6_pcie->reset_gpio, @@ -722,7 +712,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) struct device *dev = pci->dev; int ret, err; - if (imx6_pcie->vpcie && !regulator_is_enabled(imx6_pcie->vpcie)) { + if (imx6_pcie->vpcie) { ret = regulator_enable(imx6_pcie->vpcie); if (ret) { dev_err(dev, "failed to enable vpcie regulator: %d\n", @@ -796,7 +786,7 @@ static int imx6_pcie_deassert_core_reset(struct imx6_pcie *imx6_pcie) return 0; err_clks: - if (imx6_pcie->vpcie && regulator_is_enabled(imx6_pcie->vpcie) > 0) { + if (imx6_pcie->vpcie) { ret = regulator_disable(imx6_pcie->vpcie); if (ret) dev_err(dev, "failed to disable vpcie regulator: %d\n", @@ -1023,6 +1013,9 @@ static int imx6_pcie_suspend_noirq(struct device *dev) break; } + if (imx6_pcie->vpcie) + regulator_disable(imx6_pcie->vpcie); + return 0; } @@ -1269,6 +1262,8 @@ static void imx6_pcie_shutdown(struct platform_device *pdev) /* bring down link, so bootloader gets clean state in case of reboot */ imx6_pcie_assert_core_reset(imx6_pcie); + if (imx6_pcie->vpcie) + regulator_disable(imx6_pcie->vpcie); } static const struct imx6_pcie_drvdata drvdata[] = {