From patchwork Tue Oct 9 01:53:09 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanjie Lin X-Patchwork-Id: 980967 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=amlogic.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 42TgHN1tj5z9sRp for ; Tue, 9 Oct 2018 12:53:20 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726846AbeJIJHj (ORCPT ); Tue, 9 Oct 2018 05:07:39 -0400 Received: from mail-sh2.amlogic.com ([58.32.228.45]:7812 "EHLO mail-sh2.amlogic.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725887AbeJIJHi (ORCPT ); Tue, 9 Oct 2018 05:07:38 -0400 Received: from droid10.amlogic.com (10.18.11.213) by mail-sh2.amlogic.com (10.18.11.6) with Microsoft SMTP Server id 15.0.1320.4; Tue, 9 Oct 2018 09:53:39 +0800 From: Hanjie Lin To: Lorenzo Pieralisi , Bjorn Helgaas CC: Yue Wang , Hanjie Lin , Kevin Hilman , Carlo Caione , Jerome Brunet , Rob Herring , Gustavo Pimentel , Shawn Lin , Philippe Ombredanne , Cyrille Pitchen , , , , , Yixun Lan , Liang Yang , Jianxin Pan , Qiufang Dai , Jian Hu , Subject: [PATCH v5 1/2] dt-bindings: PCI: meson: add DT bindings for Amlogic Meson PCIe controller Date: Tue, 9 Oct 2018 09:53:09 +0800 Message-ID: <1539049990-30810-2-git-send-email-hanjie.lin@amlogic.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1539049990-30810-1-git-send-email-hanjie.lin@amlogic.com> References: <1539049990-30810-1-git-send-email-hanjie.lin@amlogic.com> MIME-Version: 1.0 X-Originating-IP: [10.18.11.213] Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Yue Wang The Amlogic Meson PCIe host controller is based on the Synopsys DesignWare PCI core. This patch adds documentation for the DT bindings in Meson PCIe controller. Signed-off-by: Yue Wang Signed-off-by: Hanjie Lin Reviewed-by: Rob Herring --- .../devicetree/bindings/pci/amlogic,meson-pcie.txt | 70 ++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt diff --git a/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt new file mode 100644 index 0000000..12b18f8 --- /dev/null +++ b/Documentation/devicetree/bindings/pci/amlogic,meson-pcie.txt @@ -0,0 +1,70 @@ +Amlogic Meson AXG DWC PCIE SoC controller + +Amlogic Meson PCIe host controller is based on the Synopsys DesignWare PCI core. +It shares common functions with the PCIe DesignWare core driver and +inherits common properties defined in +Documentation/devicetree/bindings/pci/designware-pci.txt. + +Additional properties are described here: + +Required properties: +- compatible: + should contain "amlogic,axg-pcie" to identify the core. +- reg: + should contain the configuration address space. +- reg-names: Must be + - "elbi" External local bus interface registers + - "cfg" Meson specific registers + - "phy" Meson PCIE PHY registers + - "config" PCIe configuration space +- reset-gpios: The GPIO to generate PCIe PERST# assert and deassert signal. +- clocks: Must contain an entry for each entry in clock-names. +- clock-names: Must include the following entries: + - "pclk" PCIe GEN 100M PLL clock + - "port" PCIe_x(A or B) RC clock gate + - "general" PCIe Phy clock + - "mipi" PCIe_x(A or B) 100M ref clock gate +- resets: phandle to the reset lines. +- reset-names: must contain "phy" "port" and "apb" + - "phy" Share PHY reset + - "port" Port A or B reset + - "apb" Share APB reset +- device_type: + should be "pci". As specified in designware-pcie.txt + + +Example configuration: + + pcie: pcie@f9800000 { + compatible = "amlogic,axg-pcie", "snps,dw-pcie"; + reg = <0x0 0xf9800000 0x0 0x400000 + 0x0 0xff646000 0x0 0x2000 + 0x0 0xff644000 0x0 0x2000 + 0x0 0xf9f00000 0x0 0x100000>; + reg-names = "elbi", "cfg", "phy", "config"; + reset-gpios = <&gpio GPIOX_19 GPIO_ACTIVE_HIGH>; + interrupts = ; + #interrupt-cells = <1>; + interrupt-map-mask = <0 0 0 0>; + interrupt-map = <0 0 0 0 &gic GIC_SPI 179 IRQ_TYPE_EDGE_RISING>; + bus-range = <0x0 0xff>; + #address-cells = <3>; + #size-cells = <2>; + device_type = "pci"; + ranges = <0x82000000 0 0 0x0 0xf9c00000 0 0x00300000>; + + clocks = <&clkc CLKID_USB + &clkc CLKID_MIPI_ENABLE + &clkc CLKID_PCIE_A + &clkc CLKID_PCIE_CML_EN0>; + clock-names = "general", + "mipi", + "pclk", + "port"; + resets = <&reset RESET_PCIE_PHY>, + <&reset RESET_PCIE_A>, + <&reset RESET_PCIE_APB>; + reset-names = "phy", + "port", + "apb"; + };