From patchwork Thu Jul 14 07:31:07 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 12917425 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C5CB5C433EF for ; Thu, 14 Jul 2022 07:53:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=KyxSVA5ALHTNiyZRvrCPKT1+1/nkPPfgRu1Yeahi8hQ=; b=s1ZhC2+8UNB3Uu dHm5kYDhfBNjo7B/GOfZAmL6X1dCSeNcK/gBFmB7bhcjfhTzX8LNiRfREVuQGkIHZpdUDY+dk8lC3 A6kMkz1tZ0l9/nzZ7mXDOuHbuCRCx8rPYvaBk67tKiCmfog/5q7/P2FrvSgTPNzioaIKiZNdtFARn 9dOa43O9pdl5lAVWQhZJXWqAAKUDZiPR416V5MHpB0AcUZMgssyPhQeeoA+e//sFERYl6lrabFYkd haPTI42/OlQ93N1jWh4hAoUfh2rKn6gBLKarfM9iKPHwjViwiUeExd5XUBnOBpDWcXFv7VdlcXM3r BMVDYhCG7KB518NXMxYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBteT-00C2bj-4h; Thu, 14 Jul 2022 07:52:49 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oBtZ2-00Bymz-SD for linux-arm-kernel@lists.infradead.org; Thu, 14 Jul 2022 07:47:14 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id A5AAF20217F; Thu, 14 Jul 2022 09:47:11 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 6C20D202182; Thu, 14 Jul 2022 09:47:11 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 20E5D180222A; Thu, 14 Jul 2022 15:47:10 +0800 (+08) From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, robh+dt@kernel.org, broonie@kernel.org, lorenzo.pieralisi@arm.com, festevam@gmail.com, francesco.dolcini@toradex.com Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com Subject: [PATCH v15 15/17] PCI: imx6: Disable clocks in reverse order of enable Date: Thu, 14 Jul 2022 15:31:07 +0800 Message-Id: <1657783869-19194-16-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1657783869-19194-1-git-send-email-hongxing.zhu@nxp.com> References: <1657783869-19194-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220714_004713_083202_0B46C8D1 X-CRM114-Status: UNSURE ( 9.24 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Bjorn Helgaas imx6_pcie_clk_enable() enables clocks in the order: pcie_phy pcie_bus pcie imx6_pcie_enable_ref_clk Change imx6_pcie_clk_disable() to disable them in the reverse order. Link: https://lore.kernel.org/r/1656645935-1370-16-git-send-email-hongxing.zhu@nxp.com Signed-off-by: Bjorn Helgaas Reviewed-by: Lucas Stach Acked-by: Richard Zhu --- drivers/pci/controller/dwc/pci-imx6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index afb4d58fd693..6d7ae141ec58 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -655,10 +655,10 @@ static int imx6_pcie_clk_enable(struct imx6_pcie *imx6_pcie) static void imx6_pcie_clk_disable(struct imx6_pcie *imx6_pcie) { + imx6_pcie_disable_ref_clk(imx6_pcie); clk_disable_unprepare(imx6_pcie->pcie); - clk_disable_unprepare(imx6_pcie->pcie_phy); clk_disable_unprepare(imx6_pcie->pcie_bus); - imx6_pcie_disable_ref_clk(imx6_pcie); + clk_disable_unprepare(imx6_pcie->pcie_phy); } static void imx6_pcie_assert_core_reset(struct imx6_pcie *imx6_pcie)