From patchwork Fri Oct 11 02:12:32 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 3020381 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BF687BF924 for ; Fri, 11 Oct 2013 02:14:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id CB63D20266 for ; Fri, 11 Oct 2013 02:14:32 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B40192025B for ; Fri, 11 Oct 2013 02:14:31 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VUSEk-0003GF-MV; Fri, 11 Oct 2013 02:13:54 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VUSEZ-0002Rt-CQ; Fri, 11 Oct 2013 02:13:43 +0000 Received: from mail-out.m-online.net ([212.18.0.9]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VUSET-0002QK-DA for linux-arm-kernel@lists.infradead.org; Fri, 11 Oct 2013 02:13:40 +0000 Received: from frontend1.mail.m-online.net (unknown [192.168.8.180]) by mail-out.m-online.net (Postfix) with ESMTP id 3cwt3k5SmZz4KK28; Fri, 11 Oct 2013 04:12:50 +0200 (CEST) X-Auth-Info: PlBKVgYnqJ/TAHktan39ZmoXvEVV7MPR71cYF/Cdmlk= Received: from chi.lan (unknown [195.140.253.167]) by smtp-auth.mnet-online.de (Postfix) with ESMTPA id 3cwt3k2ZgGzbbpP; Fri, 11 Oct 2013 04:12:50 +0200 (CEST) From: Marek Vasut To: linux-pci@vger.kernel.org Subject: [PATCH 2/2] PCI: imx6: Fix the clock for PCIe Date: Fri, 11 Oct 2013 04:12:32 +0200 Message-Id: <1381457552-6575-2-git-send-email-marex@denx.de> X-Mailer: git-send-email 1.8.4.rc3 In-Reply-To: <1381457552-6575-1-git-send-email-marex@denx.de> References: <1381457552-6575-1-git-send-email-marex@denx.de> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131010_221337_775466_2FFA1115 X-CRM114-Status: GOOD ( 11.88 ) X-Spam-Score: -1.9 (-) Cc: Marek Vasut , Richard Zhu , Sascha Hauer , Frank Li , Bjorn Helgaas , Sean Cross , Shawn Guo , Yinghai Lu , Tim Harvey , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 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+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The clk #205 are lvds_sel, not lvds_gate , so fix this. Moreover, the PCIe needs lvds_gate for successful operation, so make the PCIe driver enable (set as output) the lvds_gate . Signed-off-by: Marek Vasut Cc: Bjorn Helgaas Cc: Frank Li Cc: Richard Zhu Cc: Sascha Hauer Cc: Sean Cross Cc: Shawn Guo Cc: Tim Harvey Cc: Yinghai Lu --- arch/arm/boot/dts/imx6qdl.dtsi | 6 +++--- drivers/pci/host/pci-imx6.c | 19 ++++++++++++++++++- 2 files changed, 21 insertions(+), 4 deletions(-) diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi index 3d8874a..b8601ea 100644 --- a/arch/arm/boot/dts/imx6qdl.dtsi +++ b/arch/arm/boot/dts/imx6qdl.dtsi @@ -127,9 +127,9 @@ 0x82000000 0 0x01000000 0x01000000 0 0x00f00000>; /* non-prefetchable memory */ num-lanes = <1>; interrupts = <0 123 0x04>; - clocks = <&clks 189>, <&clks 187>, <&clks 205>, <&clks 144>; - clock-names = "pcie_ref_125m", "sata_ref_100m", "lvds_gate", "pcie_axi"; - status = "disabled"; + clocks = <&clks 189>, <&clks 187>, <&clks 205>, <&clks 144>, <&clks 207>; + clock-names = "pcie_ref_125m", "sata_ref_100m", "lvds_sel", "pcie_axi", "lvds_gate"; + status = "okay"; }; pmu { diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index 8e7adce..32b30ca 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -35,6 +35,7 @@ struct imx6_pcie { int power_on_gpio; int wake_up_gpio; int disable_gpio; + struct clk *lvds_sel; struct clk *lvds_gate; struct clk *sata_ref_100m; struct clk *pcie_ref_125m; @@ -255,6 +256,12 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) goto err_pcie_ref; } + ret = clk_prepare_enable(imx6_pcie->lvds_sel); + if (ret) { + dev_err(pp->dev, "unable to enable lvds_sel\n"); + goto err_lvds_sel; + } + ret = clk_prepare_enable(imx6_pcie->lvds_gate); if (ret) { dev_err(pp->dev, "unable to enable lvds_gate\n"); @@ -273,8 +280,10 @@ static int imx6_pcie_deassert_core_reset(struct pcie_port *pp) return 0; err_pcie_axi: - clk_disable_unprepare(imx6_pcie->lvds_gate); + clk_disable_unprepare(imx6_pcie->lvds_sel); err_lvds_gate: + clk_disable_unprepare(imx6_pcie->lvds_gate); +err_lvds_sel: clk_disable_unprepare(imx6_pcie->pcie_ref_125m); err_pcie_ref: clk_disable_unprepare(imx6_pcie->sata_ref_100m); @@ -498,6 +507,14 @@ static int __init imx6_pcie_probe(struct platform_device *pdev) } /* Fetch clocks */ + imx6_pcie->lvds_sel = devm_clk_get(&pdev->dev, "lvds_sel"); + if (IS_ERR(imx6_pcie->lvds_sel)) { + dev_err(&pdev->dev, + "lvds_sel clock select missing or invalid\n"); + ret = PTR_ERR(imx6_pcie->lvds_sel); + goto err; + } + imx6_pcie->lvds_gate = devm_clk_get(&pdev->dev, "lvds_gate"); if (IS_ERR(imx6_pcie->lvds_gate)) { dev_err(&pdev->dev,