From patchwork Sun Apr 23 08:19:03 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ryder Lee X-Patchwork-Id: 9694583 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C685E6037F for ; Sun, 23 Apr 2017 08:20:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AEFAD26E69 for ; Sun, 23 Apr 2017 08:20:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A259A27E5A; Sun, 23 Apr 2017 08:20:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 7C8FB26E69 for ; Sun, 23 Apr 2017 08:20:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=EH2BOEedlbJbs4IfGcu/o3tBtwJvhowq3322lmYd99M=; b=H5UJZWzzL89eYW P000xiXfHjhMvXMm8D4oKILqa74bRoaH/JKCyWRjWyLbztjoNVQQyj9mWDH7eISTiUc7opQI9/284 A75xbic7m9yliUyfBIxV07AIf82OCAReoKbOP9syms4PRT5JE2FxzuH0l/spAZmclZBegY5V9DlME lvfx9ODiSgF19rh12Ta6GtgqbDmUiI5wNb2uB2m2g/tw1smqKyfHBo/VucybawJl6DRZXj37PNl5L wOtSSglL2Frka4iwxBmDRxyIxLeB687bK7BCK+DiYIcs2kGltN/9i1Aa7sr8c5CAHRLomUgwOfC0G 0nTAvg2CyVhWPxttO+3w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1d2Ckh-0004yV-VA; Sun, 23 Apr 2017 08:20:15 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1d2Ck7-0002ul-V9; Sun, 23 Apr 2017 08:19:44 +0000 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1129408906; Sun, 23 Apr 2017 16:19:17 +0800 Received: from mtkslt306.mediatek.inc (10.21.14.136) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.266.1; Sun, 23 Apr 2017 16:19:15 +0800 From: Ryder Lee To: Bjorn Helgaas , Rob Herring , Arnd Bergmann Subject: [PATCH 2/2] dt-bindings: pcie: Add documentation for Mediatek PCIe Date: Sun, 23 Apr 2017 16:19:03 +0800 Message-ID: <1492935543-18190-3-git-send-email-ryder.lee@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1492935543-18190-1-git-send-email-ryder.lee@mediatek.com> References: <1492935543-18190-1-git-send-email-ryder.lee@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170423_011940_698526_05FCEF32 X-CRM114-Status: GOOD ( 18.12 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Ryder Lee , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Add documentation for PCIe host driver available in MT7623 series SoCs. Signed-off-by: Ryder Lee --- .../bindings/pci/mediatek,mt7623-pcie.txt | 153 +++++++++++++++++++++ 1 file changed, 153 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt diff --git a/Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt b/Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt new file mode 100644 index 0000000..ee93ba2 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/mediatek,mt7623-pcie.txt @@ -0,0 +1,153 @@ +Mediatek MT7623 PCIe controller + +Required properties: +- compatible: Should contain "mediatek,mt7623-pcie". +- device_type: Must be "pci" +- reg: Base addresses and lengths of the pcie controller. +- interrupts: A list of interrupt outputs of the controller. +- #address-cells: Address representation for root ports (must be 3) + - cell 0 specifies the bus and device numbers of the root port: + [23:16]: bus number + [15:11]: device number + - cell 1 denotes the upper 32 address bits and should be 0 + - cell 2 contains the lower 32 address bits and is used to translate to the + CPU address space +- #size-cells: Size representation for root ports (must be 2) +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - free_ck +- power-domains: A phandle and power domain specifier pair to the power domain + which is responsible for collapsing and restoring power to the peripheral +- bus-range: Range of bus numbers associated with this controller +- ranges: Describes the translation of addresses for root ports and standard + PCI regions. The entries must be 6 cells each, where the first three cells + correspond to the address as described for the #address-cells property + above, the fourth cell is the physical CPU address to translate to and the + fifth and six cells are as described for the #size-cells property above. + - The first three entries are expected to translate the addresses for the root + port registers, which are referenced by the assigned-addresses property of + the root port nodes (see below). + - The remaining entries setup the mapping for the standard I/O and memory + regions. + Please refer to the standard PCI bus binding document for a more detailed + explanation. + +In addition, the device tree node must have sub-nodes describing each +PCIe interface, having the following mandatory properties: + +Required properties: +- device_type: Must be "pci" +- assigned-addresses: Address and size of the port configuration registers +- reg: Only the first four bytes are used to refer to the correct bus number + and device number. +- #address-cells: Must be 3 +- #size-cells: Must be 2 +- ranges: Sub-ranges distributed from the PCIe controller node. An empty + property is sufficient. +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - sys_ck +- resets: Must contain an entry for each entry in reset-names. + See ../reset/reset.txt for details. +- reset-names: Must include the following entries: + - pcie-reset +- num-lanes: Number of lanes to use for this port. +- phys: Must contain an entry for each entry in phy-names. +- phy-names: Must include an entry for each sub node. Entries are of the form + "pcie-phyN": where N ranges from 0 to the value specified for port number. + See ../phy/phy-mt7623-pcie.txt for details. + +Examples: + +SoC dtsi: + + pcie: pcie@1a140000 { + compatible = "mediatek,mt7623-pcie"; + device_type = "pci"; + reg = <0 0x1a140000 0 0x1000>; /* PCIe shared registers */ + interrupts = , + , + ; + #address-cells = <3>; + #size-cells = <2>; + clocks = <&topckgen CLK_TOP_ETHIF_SEL>; + clock-names = "free_ck"; + power-domains = <&scpsys MT2701_POWER_DOMAIN_HIF>; + + bus-range = <0x00 0xff>; + ranges = <0x82000000 0 0x1a142000 0 0x1a142000 0 0x1000 /* Por0 registers */ + 0x82000000 0 0x1a143000 0 0x1a143000 0 0x1000 /* Por1 registers */ + 0x82000000 0 0x1a144000 0 0x1a144000 0 0x1000 /* Por2 registers */ + 0x81000000 0 0x1a160000 0 0x1a160000 0 0x00010000 /* I/O space */ + 0x83000000 0 0x60000000 0 0x60000000 0 0x10000000>; /* memory space */ + status = "disabled"; + + pcie@1,0 { + device_type = "pci"; + assigned-addresses = <0x82000800 0 0x1a142000 0 0x1000>; + reg = <0x0800 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + status = "disabled"; + + clocks = <&hifsys CLK_HIFSYS_PCIE0>; + clock-names = "sys_ck"; + resets = <&hifsys MT2701_HIFSYS_PCIE0_RST>; + reset-names = "pcie-reset"; + + num-lanes = <1>; + phys = <&pcie0_phy>; + phy-names = "pcie-phy0"; + }; + + pcie@2,0 { + device_type = "pci"; + assigned-addresses = <0x82001000 0 0x1a143000 0 0x1000>; + reg = <0x1000 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + status = "disabled"; + + clocks = <&hifsys CLK_HIFSYS_PCIE1>; + clock-names = "sys_ck"; + resets = <&hifsys MT2701_HIFSYS_PCIE1_RST>; + reset-names = "pcie-reset"; + + num-lanes = <1>; + phys = <&pcie1_phy>; + phy-names = "pcie-phy1"; + }; + + pcie@3,0 { + device_type = "pci"; + assigned-addresses = <0x82001800 0 0x1a144000 0 0x1000>; + reg = <0x1800 0 0 0 0>; + #address-cells = <3>; + #size-cells = <2>; + ranges; + status = "disabled"; + + clocks = <&hifsys CLK_HIFSYS_PCIE2>; + clock-names = "sys_ck"; + resets = <&hifsys MT2701_HIFSYS_PCIE2_RST>; + reset-names = "pcie-reset"; + + num-lanes = <1>; + phys = <&pcie2_phy>; + phy-names = "pcie-phy2"; + }; + }; + +Board dts: + + &pcie { + status = "okay"; + + pcie@1,0 { + status = "okay"; + }; + }; \ No newline at end of file