From patchwork Wed Sep 10 17:12:38 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Murali Karicheri X-Patchwork-Id: 4879431 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 0285EC0338 for ; Wed, 10 Sep 2014 17:15:10 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4B550201C8 for ; Wed, 10 Sep 2014 17:15:05 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 95C152018E for ; Wed, 10 Sep 2014 17:15:00 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XRlRv-0008OG-5Y; Wed, 10 Sep 2014 17:12:55 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XRlRr-0008DK-41 for linux-arm-kernel@lists.infradead.org; Wed, 10 Sep 2014 17:12:51 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id s8AHCFcP025167; Wed, 10 Sep 2014 12:12:15 -0500 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s8AHCE1X004349; Wed, 10 Sep 2014 12:12:14 -0500 Received: from dflp33.itg.ti.com (10.64.6.16) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.3.174.1; Wed, 10 Sep 2014 12:12:14 -0500 Received: from localhost.localdomain (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id s8AHCD47001437; Wed, 10 Sep 2014 12:12:13 -0500 From: Murali Karicheri To: , , , , , , , , , , Subject: [PATCH v3 1/2] PCI: keystone: remove handle of PCI mode configuration Date: Wed, 10 Sep 2014 13:12:38 -0400 Message-ID: <1410369159-11564-1-git-send-email-m-karicheri2@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140910_101251_367982_E281989B X-CRM114-Status: GOOD ( 14.75 ) X-Spam-Score: -7.5 (-------) Cc: Murali Karicheri X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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_NONE, 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 Keystone PCI hardware supports both RC and EP modes and devcfg register has bits to boot strap the device to either of these modes. It seems proper to add this functionality to the boot loader rather than in the driver as device will be operating in either mode, not both any time. Currently the driver supports only RC mode and hence register configuration in the driver is not needed and driver can assume this is a RC hardware. Also update the DT documentation accordingly. Signed-off-by: Murali Karicheri Acked-by: Arnd Bergmann --- v3 - No change v2 - Added this separate patch to remove pci mode handling .../devicetree/bindings/pci/pci-keystone.txt | 4 +--- drivers/pci/host/pci-keystone.c | 21 ++------------------ 2 files changed, 3 insertions(+), 22 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/pci-keystone.txt b/Documentation/devicetree/bindings/pci/pci-keystone.txt index ceb3e24..bedacf0 100644 --- a/Documentation/devicetree/bindings/pci/pci-keystone.txt +++ b/Documentation/devicetree/bindings/pci/pci-keystone.txt @@ -13,9 +13,7 @@ Required Properties:- compatibility: "ti,keystone-pcie" reg: index 1 is the base address and length of DW application registers. - index 2 is the base address and length of PCI mode configuration - register. - index 3 is the base address and length of PCI device ID register. + index 2 is the base address and length of PCI device ID register. pcie_msi_intc : Interrupt controller device node for MSI IRQ chip interrupt-cells: should be set to 1 diff --git a/drivers/pci/host/pci-keystone.c b/drivers/pci/host/pci-keystone.c index ff8ed25..f1119eb 100644 --- a/drivers/pci/host/pci-keystone.c +++ b/drivers/pci/host/pci-keystone.c @@ -35,10 +35,6 @@ #define MAX_MSI_HOST_IRQS 8 #define MAX_LEGACY_HOST_IRQS 4 -/* RC mode settings masks */ -#define PCIE_RC_MODE BIT(2) -#define PCIE_MODE_MASK (BIT(1) | BIT(2)) - /* DEV_STAT_CTRL */ #define PCIE_CAP_BASE 0x70 @@ -355,7 +351,6 @@ static int __init ks_pcie_probe(struct platform_device *pdev) void __iomem *reg_p; struct phy *phy; int ret = 0; - u32 val; ks_pcie = devm_kzalloc(&pdev->dev, sizeof(*ks_pcie), GFP_KERNEL); @@ -365,18 +360,6 @@ static int __init ks_pcie_probe(struct platform_device *pdev) } pp = &ks_pcie->pp; - /* index 2 is the devcfg register for RC mode settings */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 2); - reg_p = devm_ioremap_resource(dev, res); - if (IS_ERR(reg_p)) - return PTR_ERR(reg_p); - - /* enable RC mode in devcfg */ - val = readl(reg_p); - val &= ~PCIE_MODE_MASK; - val |= PCIE_RC_MODE; - writel(val, reg_p); - /* initialize SerDes Phy if present */ phy = devm_phy_get(dev, "pcie-phy"); if (!IS_ERR_OR_NULL(phy)) { @@ -385,8 +368,8 @@ static int __init ks_pcie_probe(struct platform_device *pdev) return ret; } - /* index 3 is to read PCI DEVICE_ID */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 3); + /* index 2 is to read PCI DEVICE_ID */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 2); reg_p = devm_ioremap_resource(dev, res); if (IS_ERR(reg_p)) return PTR_ERR(reg_p);