From patchwork Wed Oct 2 07:20:46 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1170503 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-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.b="x774vBXk"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46jncH2PcBz9sPq for ; Wed, 2 Oct 2019 17:21:03 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726463AbfJBHU6 (ORCPT ); Wed, 2 Oct 2019 03:20:58 -0400 Received: from mail-wm1-f67.google.com ([209.85.128.67]:53115 "EHLO mail-wm1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726435AbfJBHU5 (ORCPT ); Wed, 2 Oct 2019 03:20:57 -0400 Received: by mail-wm1-f67.google.com with SMTP id r19so5919808wmh.2 for ; Wed, 02 Oct 2019 00:20:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=HVeija8izmHAdZ2KAw8CMxpHYhKosiGHrmDwIMpjElY=; b=x774vBXkOgSY/byW+bo39MD70Xbp/IrcihA+0ifIntJCWYERcFOet9cRaxG+jBYseM PYVpsE2WrVND7HnW2NvlfcgJu4mu1uol9iiYnr4u1GRR6NHZjs0nxMVTe915rpBWMNBx uYAfK1BksbFoYliPIJqZL4zZhG6E4M0ePD0dannvLBoxG2swPtL2IE1C+Kz1dEHx836n kAQVK8Je7ersqktwR6Wi4N22f1mDYIzAa7JfEoXpZX4j/oFR59kGaYA5+X/al04KZ4LW Q3X/zK6ar6t/e7IEo46Uz3Uyjx5LTz9yJ24SDVGe+yr1jHlOzexC8LVCxS6mejOJ929P uYLg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=HVeija8izmHAdZ2KAw8CMxpHYhKosiGHrmDwIMpjElY=; b=JAeO0rW6MPSLw+3klOAHnP6zdq2Pc97LONh3N4jVelxguoa0AFnMLxjoD8xWdCX9K3 a7PqnFuly1Qwroeih8MuZG/HFL807MPiqfdhLX48VxecA1bFRc3ZO0sfr/8+MMPSRsRU a1SReg09XS1FXWnpYziWYiXhJWZbWbSrn/kbJiRuwWm7bDbhJMYZaKcORavk8MYMLwUK T5FdBZ4OHlIJ0ahfF1JRV6Zhv9JwFJ4ivDXSug/U7H1YIdTArcO3yPrPoiNvT8h6wOzG z/kzc61s0waqmN8zMCqnoL3kwjbif8tzD690tIiNvxVmJAQay4qHDkeDjMMoEM036rpR /mZQ== X-Gm-Message-State: APjAAAX7D42OL576mFhmTxHR+OuPrwSLxaUnfv9EyJVrX4dBiLY8EijB kf2EQIw0xXTwYLxQ/1f5v+betw== X-Google-Smtp-Source: APXvYqw37EMIlDO3/i8K7x2vCe9aidvUlQNhuE8pYv8+zuHm4N1YQISfuteHZshlR+FRVCbQrseHUA== X-Received: by 2002:a1c:b745:: with SMTP id h66mr1550049wmf.70.1570000852856; Wed, 02 Oct 2019 00:20:52 -0700 (PDT) Received: from debian-brgl.home ([2a01:cb1d:af:5b00:6d6c:8493:1ab5:dad7]) by smtp.gmail.com with ESMTPSA id n18sm3850640wmi.20.2019.10.02.00.20.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 02 Oct 2019 00:20:52 -0700 (PDT) From: Bartosz Golaszewski To: Rob Herring , Mark Rutland , Peter Rosin Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org, Bartosz Golaszewski , Rob Herring Subject: [PATCH v6 1/2] dt-bindings: at24: convert the binding document to yaml Date: Wed, 2 Oct 2019 09:20:46 +0200 Message-Id: <20191002072047.20895-2-brgl@bgdev.pl> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191002072047.20895-1-brgl@bgdev.pl> References: <20191002072047.20895-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org From: Bartosz Golaszewski Convert the binding document for at24 EEPROMs from txt to yaml. The compatible property uses a regex pattern to address all the possible combinations of "vendor,model" strings. Signed-off-by: Bartosz Golaszewski [robh: rework compatible schema, fix missing allOf for $ref, fix errors in example] Signed-off-by: Rob Herring [Bartosz: added comments explaining the compatible property] Signed-off-by: Bartosz Golaszewski --- .../devicetree/bindings/eeprom/at24.txt | 90 +-------- .../devicetree/bindings/eeprom/at24.yaml | 185 ++++++++++++++++++ MAINTAINERS | 2 +- 3 files changed, 187 insertions(+), 90 deletions(-) create mode 100644 Documentation/devicetree/bindings/eeprom/at24.yaml diff --git a/Documentation/devicetree/bindings/eeprom/at24.txt b/Documentation/devicetree/bindings/eeprom/at24.txt index 22aead844d0f..c94acbb8cb0c 100644 --- a/Documentation/devicetree/bindings/eeprom/at24.txt +++ b/Documentation/devicetree/bindings/eeprom/at24.txt @@ -1,89 +1 @@ -EEPROMs (I2C) - -Required properties: - - - compatible: Must be a "," pair. The following - values are supported (assuming "atmel" as manufacturer): - - "atmel,24c00", - "atmel,24c01", - "atmel,24cs01", - "atmel,24c02", - "atmel,24cs02", - "atmel,24mac402", - "atmel,24mac602", - "atmel,spd", - "atmel,24c04", - "atmel,24cs04", - "atmel,24c08", - "atmel,24cs08", - "atmel,24c16", - "atmel,24cs16", - "atmel,24c32", - "atmel,24cs32", - "atmel,24c64", - "atmel,24cs64", - "atmel,24c128", - "atmel,24c256", - "atmel,24c512", - "atmel,24c1024", - "atmel,24c2048", - - If is not "atmel", then a fallback must be used - with the same and "atmel" as manufacturer. - - Example: - compatible = "microchip,24c128", "atmel,24c128"; - - Supported manufacturers are: - - "catalyst", - "microchip", - "nxp", - "ramtron", - "renesas", - "rohm", - "st", - - Some vendors use different model names for chips which are just - variants of the above. Known such exceptions are listed below: - - "nxp,se97b" - the fallback is "atmel,24c02", - "renesas,r1ex24002" - the fallback is "atmel,24c02" - "renesas,r1ex24016" - the fallback is "atmel,24c16" - "renesas,r1ex24128" - the fallback is "atmel,24c128" - "rohm,br24t01" - the fallback is "atmel,24c01" - - - reg: The I2C address of the EEPROM. - -Optional properties: - - - pagesize: The length of the pagesize for writing. Please consult the - manual of your device, that value varies a lot. A wrong value - may result in data loss! If not specified, a safety value of - '1' is used which will be very slow. - - - read-only: This parameterless property disables writes to the eeprom. - - - size: Total eeprom size in bytes. - - - no-read-rollover: This parameterless property indicates that the - multi-address eeprom does not automatically roll over - reads to the next slave address. Please consult the - manual of your device. - - - wp-gpios: GPIO to which the write-protect pin of the chip is connected. - - - address-width: number of address bits (one of 8, 16). - - - num-addresses: total number of i2c slave addresses this device takes - -Example: - -eeprom@52 { - compatible = "atmel,24c32"; - reg = <0x52>; - pagesize = <32>; - wp-gpios = <&gpio1 3 0>; - num-addresses = <8>; -}; +This file has been moved to at24.yaml. diff --git a/Documentation/devicetree/bindings/eeprom/at24.yaml b/Documentation/devicetree/bindings/eeprom/at24.yaml new file mode 100644 index 000000000000..c56f27fde3b3 --- /dev/null +++ b/Documentation/devicetree/bindings/eeprom/at24.yaml @@ -0,0 +1,185 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Copyright 2019 BayLibre SAS +%YAML 1.2 +--- +$id: "http://devicetree.org/schemas/eeprom/at24.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: I2C EEPROMs compatible with Atmel's AT24 + +maintainers: + - Bartosz Golaszewski + +select: + properties: + compatible: + contains: + pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$" + required: + - compatible + +properties: + $nodename: + pattern: "^eeprom@[0-9a-f]{1,2}$" + + # There are multiple known vendors who manufacture EEPROM chips compatible + # with Atmel's AT24. The compatible string requires either a single item + # if the memory comes from Atmel (in which case the vendor part must be + # 'atmel') or two items with the same 'model' part where the vendor part of + # the first one is the actual manufacturer and the second item is the + # corresponding 'atmel,' from Atmel. + compatible: + oneOf: + - allOf: + - minItems: 1 + maxItems: 2 + items: + - pattern: "^(atmel|catalyst|microchip|nxp|ramtron|renesas|rohm|st),(24(c|cs|mac)[0-9]+|spd)$" + - pattern: "^atmel,(24(c|cs|mac)[0-9]+|spd)$" + - oneOf: + - items: + pattern: c00$ + - items: + pattern: c01$ + - items: + pattern: cs01$ + - items: + pattern: c02$ + - items: + pattern: cs02$ + - items: + pattern: mac402$ + - items: + pattern: mac602$ + - items: + pattern: c04$ + - items: + pattern: cs04$ + - items: + pattern: c08$ + - items: + pattern: cs08$ + - items: + pattern: c16$ + - items: + pattern: cs16$ + - items: + pattern: c32$ + - items: + pattern: cs32$ + - items: + pattern: c64$ + - items: + pattern: cs64$ + - items: + pattern: c128$ + - items: + pattern: cs128$ + - items: + pattern: c256$ + - items: + pattern: cs256$ + - items: + pattern: c512$ + - items: + pattern: cs512$ + - items: + pattern: c1024$ + - items: + pattern: cs1024$ + - items: + pattern: c2048$ + - items: + pattern: cs2048$ + - items: + pattern: spd$ + # These are special cases that don't conform to the above pattern. + # Each requires a standard at24 model as fallback. + - items: + - const: rohm,br24t01 + - const: atmel,24c01 + - items: + - const: nxp,se97b + - const: atmel,24c02 + - items: + - const: renesas,r1ex24002 + - const: atmel,24c02 + - items: + - const: renesas,r1ex24016 + - const: atmel,24c16 + - items: + - const: renesas,r1ex24128 + - const: atmel,24c128 + + reg: + maxItems: 1 + + pagesize: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: + The length of the pagesize for writing. Please consult the + manual of your device, that value varies a lot. A wrong value + may result in data loss! If not specified, a safety value of + '1' is used which will be very slow. + enum: [ 1, 8, 16, 32, 64, 128, 258 ] + default: 1 + + read-only: + $ref: /schemas/types.yaml#definitions/flag + description: + Disables writes to the eeprom. + + size: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Total eeprom size in bytes. + + no-read-rollover: + $ref: /schemas/types.yaml#definitions/flag + description: + Indicates that the multi-address eeprom does not automatically roll + over reads to the next slave address. Please consult the manual of + your device. + + wp-gpios: + description: + GPIO to which the write-protect pin of the chip is connected. + maxItems: 1 + + address-width: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: + Number of address bits. + default: 8 + enum: [ 8, 16 ] + + num-addresses: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: + Total number of i2c slave addresses this device takes. + default: 1 + minimum: 1 + maximum: 8 + +required: + - compatible + - reg + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + eeprom@52 { + compatible = "microchip,24c32", "atmel,24c32"; + reg = <0x52>; + pagesize = <32>; + wp-gpios = <&gpio1 3 0>; + num-addresses = <8>; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index 296de2b51c83..320fc8bba872 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2699,7 +2699,7 @@ M: Bartosz Golaszewski L: linux-i2c@vger.kernel.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux.git S: Maintained -F: Documentation/devicetree/bindings/eeprom/at24.txt +F: Documentation/devicetree/bindings/eeprom/at24.yaml F: drivers/misc/eeprom/at24.c ATA OVER ETHERNET (AOE) DRIVER