From patchwork Tue Nov 26 21:10:46 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 294418 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 67D132C00BC for ; Wed, 27 Nov 2013 08:11:23 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932544Ab3KZVLW (ORCPT ); Tue, 26 Nov 2013 16:11:22 -0500 Received: from mail-out.m-online.net ([212.18.0.10]:51148 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932624Ab3KZVLV (ORCPT ); Tue, 26 Nov 2013 16:11:21 -0500 Received: from frontend1.mail.m-online.net (frontend1.mail.intern.m-online.net [192.168.8.180]) by mail-out.m-online.net (Postfix) with ESMTP id 3dTd8859GDz3hkLD; Tue, 26 Nov 2013 22:11:20 +0100 (CET) X-Auth-Info: rDX7237GUfSE60CLjw8fTix/ZC3DnRhkZVxotqi4nc0= Received: from chi.lan (unknown [195.140.253.167]) by smtp-auth.mnet-online.de (Postfix) with ESMTPA id 3dTd871Cbhzbbjk; Tue, 26 Nov 2013 22:11:19 +0100 (CET) From: Marek Vasut To: linux-arm-kernel@lists.infradead.org Cc: linux-pci@vger.kernel.org, Marek Vasut , Bjorn Helgaas , Frank Li , Harro Haan , Jingoo Han , Mohit KUMAR , Pratyush Anand , Richard Zhu , Sascha Hauer , Sean Cross , Shawn Guo , Siva Reddy Kallam , Srikanth T Shivanand , Tim Harvey , Troy Kisky , Yinghai Lu Subject: [PATCH 5/7] PCI: imx6: Split away the link up wait loop Date: Tue, 26 Nov 2013 22:10:46 +0100 Message-Id: <1385500248-6551-5-git-send-email-marex@denx.de> X-Mailer: git-send-email 1.8.4.2 In-Reply-To: <1385500248-6551-1-git-send-email-marex@denx.de> References: <1385500248-6551-1-git-send-email-marex@denx.de> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Split the function that waits for the PCIe link to come up from the rest if the host init function. We will find this change useful in the subsequent patch, since this will be called twice then. Signed-off-by: Marek Vasut Cc: Bjorn Helgaas Cc: Frank Li Cc: Harro Haan Cc: Jingoo Han Cc: Mohit KUMAR Cc: Pratyush Anand Cc: Richard Zhu Cc: Sascha Hauer Cc: Sean Cross Cc: Shawn Guo Cc: Siva Reddy Kallam Cc: Srikanth T Shivanand Cc: Tim Harvey Cc: Troy Kisky Cc: Yinghai Lu --- drivers/pci/host/pci-imx6.c | 32 ++++++++++++++++++++------------ 1 file changed, 20 insertions(+), 12 deletions(-) diff --git a/drivers/pci/host/pci-imx6.c b/drivers/pci/host/pci-imx6.c index a9781e7..5d85fc2 100644 --- a/drivers/pci/host/pci-imx6.c +++ b/drivers/pci/host/pci-imx6.c @@ -304,6 +304,25 @@ static void imx6_pcie_init_phy(struct pcie_port *pp) IMX6Q_GPR8_TX_SWING_LOW, 127 << 25); } +static int imx6_pcie_wait_for_link(struct pcie_port *pp) +{ + int count = 200; + + while (!dw_pcie_link_up(pp)) { + usleep_range(100, 1000); + if (--count) + continue; + + dev_err(pp->dev, "phy link never came up\n"); + dev_dbg(pp->dev, "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n", + readl(pp->dbi_base + PCIE_PHY_DEBUG_R0), + readl(pp->dbi_base + PCIE_PHY_DEBUG_R1)); + return -EINVAL; + } + + return 0; +} + static void imx6_pcie_host_init(struct pcie_port *pp) { int count = 0; @@ -320,18 +339,7 @@ static void imx6_pcie_host_init(struct pcie_port *pp) regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6Q_GPR12_PCIE_CTL_2, 1 << 10); - while (!dw_pcie_link_up(pp)) { - usleep_range(100, 1000); - count++; - if (count >= 200) { - dev_err(pp->dev, "phy link never came up\n"); - dev_dbg(pp->dev, - "DEBUG_R0: 0x%08x, DEBUG_R1: 0x%08x\n", - readl(pp->dbi_base + PCIE_PHY_DEBUG_R0), - readl(pp->dbi_base + PCIE_PHY_DEBUG_R1)); - break; - } - } + imx6_pcie_wait_for_link(pp); return; }