From patchwork Fri Dec 6 13:41:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Brandt X-Patchwork-Id: 11276325 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 524B3138D for ; Fri, 6 Dec 2019 14:03:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 397A62464E for ; Fri, 6 Dec 2019 14:03:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726287AbfLFODV (ORCPT ); Fri, 6 Dec 2019 09:03:21 -0500 Received: from pbmsgap02.intersil.com ([192.157.179.202]:49438 "EHLO pbmsgap02.intersil.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726272AbfLFODU (ORCPT ); Fri, 6 Dec 2019 09:03:20 -0500 Received: from pps.filterd (pbmsgap02.intersil.com [127.0.0.1]) by pbmsgap02.intersil.com (8.16.0.27/8.16.0.27) with SMTP id xB6Dgi2p000754; Fri, 6 Dec 2019 08:42:56 -0500 Received: from pbmxdp01.intersil.corp (pbmxdp01.pb.intersil.com [132.158.200.222]) by pbmsgap02.intersil.com with ESMTP id 2wkkffmn5f-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Fri, 06 Dec 2019 08:42:56 -0500 Received: from pbmxdp02.intersil.corp (132.158.200.223) by pbmxdp01.intersil.corp (132.158.200.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.1531.3; Fri, 6 Dec 2019 08:42:55 -0500 Received: from localhost.localdomain (132.158.202.109) by pbmxdp02.intersil.corp (132.158.200.223) with Microsoft SMTP Server id 15.1.1531.3 via Frontend Transport; Fri, 6 Dec 2019 08:42:53 -0500 From: Chris Brandt To: Mark Brown , Rob Herring , "Mark Rutland" , Geert Uytterhoeven , Michael Turquette , Stephen Boyd CC: , , , , Mason Yang , Sergei Shtylyov , Chris Brandt Subject: [PATCH v2 2/6] dt-bindings: spi: Document Renesas SPIBSC bindings Date: Fri, 6 Dec 2019 08:41:58 -0500 Message-ID: <20191206134202.18784-3-chris.brandt@renesas.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191206134202.18784-1-chris.brandt@renesas.com> References: <20191206134202.18784-1-chris.brandt@renesas.com> MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-12-06_03:,, signatures=0 X-Proofpoint-Spam-Details: rule=junk_notspam policy=junk score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1911200000 definitions=main-1912060118 X-Proofpoint-Spam-Reason: mlx Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Document the bindings used by the Renesas SPI bus space controller. Signed-off-by: Chris Brandt --- v2: * change to YAML format * add interrupts property * Used more terms directly from the hardware manual --- .../bindings/spi/renesas,spibsc.yaml | 115 ++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/renesas,spibsc.yaml diff --git a/Documentation/devicetree/bindings/spi/renesas,spibsc.yaml b/Documentation/devicetree/bindings/spi/renesas,spibsc.yaml new file mode 100644 index 000000000000..afbdc0824cc6 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/renesas,spibsc.yaml @@ -0,0 +1,115 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/renesas,spibsc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Renesas SPI Bus Space Controller (SPIBSC) Device Tree Bindings + +description: | + Otherwise referred to as the "SPI Multi I/O Bus Controller" in SoC hardware + manuals. This controller was designed specifically for accessing Serial flash + devices such as SPI Flash, HyperFlash and OctaFlash. The HW can operate in two + modes. One mode allows for normal byte by byte access (refereed to as + "Manual Mode"). The other mode allows for direct memory mapped access (read + only) to the flash area by the CPU (refereed to as "External Address Space + Read Mode"). + +allOf: + - $ref: spi-controller.yaml# + +maintainers: + - Chris Brandt + +properties: + compatible: + oneOf: + - items: + - enum: + - renesas,r7s72100-spibsc # RZ/A1 + - renesas,r7s9210-spibsc # RZ/A2 + + reg: + minItems: 2 + maxItems: 2 + items: + - description: Registers + - description: Memory Mapped Address Space + + interrupts: + description: Some HW versions do not contain interrupts + maxItems: 1 + + clocks: + maxItems: 1 + + flash: + description: | + (Optional) In order to use the HW for R/W access ("Manual Mode"), a "flash" + subnode must be present with a "compatible" property that contains + "jedec,spi-nor". If a spi-nor property is not found, the HW is assumed to be + already operating in "External Address Space Read Mode". + +required: + - compatible + - reg + - clocks + - '#address-cells' + - '#size-cells' + +examples: + - | + # This example is for "Manual Mode" + spibsc: spi@1f800000 { + compatible = "renesas,r7s9210-spibsc"; + reg = <0x1f800000 0x100>, <0x20000000 0x10000000>; + clocks = <&cpg CPG_MOD 83>; + power-domains = <&cpg>; + interrupts = ; + #address-cells = <1>; + #size-cells = <0>; + + flash@0 { + compatible = "jedec,spi-nor"; + reg = <0>; + spi-max-frequency = <40000000>; + + partitions { + compatible = "fixed-partitions"; + #address-cells = <1>; + #size-cells = <1>; + + partition@0000000 { + label = "u-boot"; + reg = <0x00000000 0x80000>; + }; + }; + }; + + # This example is for "External Address Space Read Mode" + spibsc: spi@1f800000 { + compatible = "renesas,r7s9210-spibsc"; + reg = <0x1f800000 0x100>, <0x20000000 0x10000000>; + clocks = <&cpg CPG_MOD 83>; + power-domains = <&cpg>; + interrupts = ; + #address-cells = <1>; + #size-cells = <0>; + }; + flash@20000000 { + compatible = "mtd-rom"; + probe-type = "direct-mapped"; + reg = <0x20000000 0x4000000>; + bank-width = <4>; + device-width = <1>; + #address-cells = <1>; + #size-cells = <1>; + + partition@80000 { + label ="uboot_env"; + reg = <0x00080000 0x010000>; + read-only; + }; + }; + +...