From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9CC93C33CB2 for ; Wed, 29 Jan 2020 07:25:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7646620716 for ; Wed, 29 Jan 2020 07:25:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726298AbgA2HZa (ORCPT ); Wed, 29 Jan 2020 02:25:30 -0500 Received: from mga07.intel.com ([134.134.136.100]:7883 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726104AbgA2HZ2 (ORCPT ); Wed, 29 Jan 2020 02:25:28 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 28 Jan 2020 23:25:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,376,1574150400"; d="scan'208";a="232324595" Received: from sgsxdev004.isng.intel.com (HELO localhost) ([10.226.88.13]) by orsmga006.jf.intel.com with ESMTP; 28 Jan 2020 23:25:01 -0800 From: "Ramuthevar,Vadivel MuruganX" To: broonie@kernel.org, vigneshr@ti.com, linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: robh+dt@kernel.org, dan.carpenter@oracle.com, cheol.yong.kim@intel.com, qi-ming.wu@intel.com, Ramuthevar Vadivel Murugan Subject: [PATCH v8 1/2] dt-bindings: spi: Add schema for Cadence QSPI Controller driver Date: Wed, 29 Jan 2020 15:24:54 +0800 Message-Id: <20200129072455.35807-2-vadivel.muruganx.ramuthevar@linux.intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20200129072455.35807-1-vadivel.muruganx.ramuthevar@linux.intel.com> References: <20200129072455.35807-1-vadivel.muruganx.ramuthevar@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Ramuthevar Vadivel Murugan Add dt-bindings documentation for Cadence-QSPI controller to support spi based flash memories. Signed-off-by: Ramuthevar Vadivel Murugan --- .../devicetree/bindings/spi/cdns,qspi-nor.yaml | 147 +++++++++++++++++++++ 1 file changed, 147 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml diff --git a/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml new file mode 100644 index 000000000000..1a4d6e8d0d0b --- /dev/null +++ b/Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml @@ -0,0 +1,147 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/spi/cdns,qspi-nor.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Cadence QSPI Flash Controller support + +maintainers: + - Ramuthevar Vadivel Murugan + +allOf: + - $ref: "spi-controller.yaml#" + +description: | + Binding Documentation for Cadence QSPI controller,This controller is + present in the Intel LGM, Altera SoCFPGA and TI SoCs and this driver + has been tested On Intel's LGM SoC. + + - compatible : should be one of the following: + Generic default - "cdns,qspi-nor". + For TI 66AK2G SoC - "ti,k2g-qspi", "cdns,qspi-nor". + For TI AM654 SoC - "ti,am654-ospi", "cdns,qspi-nor". + For Intel LGM SoC - "intel,lgm-qspi", "cdns,qspi-nor". + +properties: + compatible: + oneOf: + - items: + - enum: + - ti,k2g-qspi + - const: cdns,qspi-nor + + - items: + - enum: + - ti,am654-ospi + - const: cdns,qspi-nor + + - items: + - enum: + - intel,lgm-qspi + - const: cdns,qspi-nor + + - items: + - const: cdns,qspi-nor + + reg: + maxItems: 2 + + interrupts: + maxItems: 1 + + clocks: + maxItems: 1 + + cdns,fifo-depth: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Size of the data FIFO in words. + + cdns,fifo-width: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Bus width of the data FIFO in bytes. + + cdns,trigger-address: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + 32-bit indirect AHB trigger address. + + cdns,rclk-en: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Flag to indicate that QSPI return clock is used to latch the read data + rather than the QSPI clock. Make sure that QSPI return clock is populated + on the board before using this property. + +# subnode's properties +patternProperties: + "^.*@[0-9a-fA-F]+$": + type: object + description: + flash device uses the subnodes below defined properties. + + cdns,read-delay: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Delay for read capture logic, in clock cycles. + + cdns,tshsl-ns: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Delay in nanoseconds for the length that the master mode chip select + outputs are de-asserted between transactions. + + cdns,tsd2d-ns: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Delay in nanoseconds between one chip select being de-activated + and the activation of another. + + cdns,tchsh-ns: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Delay in nanoseconds between last bit of current transaction and + deasserting the device chip select (qspi_n_ss_out). + + cdns,tslch-ns: + $ref: /schemas/types.yaml#/definitions/uint32 + description: | + Delay in nanoseconds between setting qspi_n_ss_out low and + first bit transfer. + +required: + - compatible + - reg + - interrupts + - clocks + - cdns,fifo-depth + - cdns,fifo-width + - cdns,trigger-address + +examples: + - | + qspi: spi@ff705000 { + compatible = "cdns,qspi-nor"; + #address-cells = <1>; + #size-cells = <0>; + reg = <0xff705000 0x1000>, + <0xffa00000 0x1000>; + interrupts = <0 151 4>; + clocks = <&qspi_clk>; + cdns,fifo-depth = <128>; + cdns,fifo-width = <4>; + cdns,trigger-address = <0x00000000>; + + flash0: n25q00@0 { + compatible = "jedec,spi-nor"; + reg = <0x0>; + cdns,read-delay = <4>; + cdns,tshsl-ns = <50>; + cdns,tsd2d-ns = <50>; + cdns,tchsh-ns = <4>; + cdns,tslch-ns = <4>; + }; + }; + -- 2.11.0