From patchwork Thu Mar 7 19:50:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 13586194 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AA970C54E58 for ; Thu, 7 Mar 2024 19:51:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Ymx/aFBc9xUVxM8Diz2sRIpbtY6LbIyfxlWt6ioNtfU=; b=l1UyeprG8ufrvo zaDr6fzqQlWp+Ra8yvU1wtxXezKX+8s1KeS3YGS3cXGg7Ft8yRA0nMdgYQFVRfNXX0s3NRxp64mb0 cCAXMWwcEFOU9MSVLMXHStY7LN9cabims+Xw2reIHhMhVgK/g68nhTVp8w3w+6ho42TbaJZBI04Vk cgJuT6aUc20+CGqFLzAt832Z6EHbMD3G5Xw0gBSOLXByn0m73SXEEQhjfj9EOLEjmdm7x3o1dWlRj nUPNTnBputHHWVLNTG0KjA5Y/QNZ72UVzNbedG+449s0vn4U4ED5P3mXbnoWne2aywBkdxze2TrES D8rWmhcoHQil3jwJZ4hA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1riJlp-000000068jY-2KhW; Thu, 07 Mar 2024 19:51:13 +0000 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1riJle-000000068dF-0oip for linux-arm-kernel@lists.infradead.org; Thu, 07 Mar 2024 19:51:06 +0000 Received: from svr-chch-seg1.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 3A9EB2C04A9; Fri, 8 Mar 2024 08:50:56 +1300 (NZDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail181024; t=1709841056; bh=xxBD7nIRpCKC/svvZNqUfTVZv80HTqUWAxM9FrAVvSQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CNEDOW3V8SXBIDlNITxoSq/hyzsBzTYpbmGAd/yPN66zdrAav5c5ranALa004zsC0 Zuk3ywkA5vI5xj6mo/X77UvMcxF3HC0SsIzxmZRYuW7Hs8e9SzBjJ9Zz4ozJ3T9nlI seARkJlvJMwcWWA+pUwA75D1I7Fn3lVNlTIEetKM0xVMU9ovwk39bgEDdYbeAL7IaT 7NY8dlG4srXSZ+HWI0epAttTOG1URHfnuoeP77BExQVjFNJDwAadYMV/uw5faeCsmS 3lbBupkPKRSUmXpVZ3m9qzCCu+bcNZ3KRQPvYD8he5lCdAKyAefXDl+rIRCmUXlBJJ wUjYE+DYQQfZA== Received: from pat.atlnz.lc (Not Verified[10.32.16.33]) by svr-chch-seg1.atlnz.lc with Trustwave SEG (v8,2,6,11305) id ; Fri, 08 Mar 2024 08:50:55 +1300 Received: from chrisp-dl.ws.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.30]) by pat.atlnz.lc (Postfix) with ESMTP id C709613EE85; Fri, 8 Mar 2024 08:50:55 +1300 (NZDT) Received: by chrisp-dl.ws.atlnz.lc (Postfix, from userid 1030) id BF7542808BA; Fri, 8 Mar 2024 08:50:55 +1300 (NZDT) From: Chris Packham To: andy@kernel.org, geert@linux-m68k.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, andrew@lunn.ch, gregory.clement@bootlin.com, sebastian.hesselbarth@gmail.com, lee@kernel.org Cc: linux-leds@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Chris Packham Subject: [PATCH v6 2/3] dt-bindings: auxdisplay: Add bindings for generic 7-segment LED Date: Fri, 8 Mar 2024 08:50:52 +1300 Message-ID: <20240307195053.1320538-3-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240307195053.1320538-1-chris.packham@alliedtelesis.co.nz> References: <20240307195053.1320538-1-chris.packham@alliedtelesis.co.nz> MIME-Version: 1.0 X-SEG-SpamProfiler-Analysis: v=2.4 cv=BKkQr0QG c=1 sm=1 tr=0 ts=65ea1aa0 a=KLBiSEs5mFS1a/PbTCJxuA==:117 a=K6JAEmCyrfEA:10 a=tBb2bbeoAAAA:8 a=VwQbUJbxAAAA:8 a=gEfo2CItAAAA:8 a=UL8_YvhhsuCliVb0JXoA:9 a=3ZKOabzyN94A:10 a=Oj-tNtZlA1e06AYgeCfH:22 a=AjGcO6oz07-iQ99wixmX:22 a=sptkURWiP4Gy88Gu7hUp:22 X-SEG-SpamProfiler-Score: 0 x-atlnz-ls: pat X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240307_115102_755488_069386BA X-CRM114-Status: GOOD ( 12.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add bindings for a generic 7-segment LED display using GPIOs. Signed-off-by: Chris Packham Reviewed-by: Geert Uytterhoeven Reviewed-by: Rob Herring --- Notes: Changes in v6: - Collect R-by from Geert and Rob Changes in v5: - Preserve formatting, maxItems set to 8, group GPIO specifiers as suggested by Geert Changes in v4: - Add ASCII art diagram showing arrangement of segments Changes in v3: - Set maxItems: 7 - Expand description of segment-gpios property. - Use compatible = "gpio-7-segment" as suggested by Rob Changes in v2: - Use compatible = "generic-gpio-7seg" to keep checkpatch.pl happy .../bindings/auxdisplay/gpio-7-segment.yaml | 55 +++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/auxdisplay/gpio-7-segment.yaml diff --git a/Documentation/devicetree/bindings/auxdisplay/gpio-7-segment.yaml b/Documentation/devicetree/bindings/auxdisplay/gpio-7-segment.yaml new file mode 100644 index 000000000000..328954893c64 --- /dev/null +++ b/Documentation/devicetree/bindings/auxdisplay/gpio-7-segment.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/auxdisplay/gpio-7-segment.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GPIO based LED segment display + +maintainers: + - Chris Packham + +properties: + compatible: + const: gpio-7-segment + + segment-gpios: + description: | + An array of GPIOs one per segment. The first GPIO corresponds to the A + segment, the seventh GPIO corresponds to the G segment. Some LED blocks + also have a decimal point which can be specified as an optional eighth + segment. + + -a- + | | + f b + | | + -g- + | | + e c + | | + -d- dp + + minItems: 7 + maxItems: 8 + +required: + - segment-gpios + +additionalProperties: false + +examples: + - | + + #include + + led-7seg { + compatible = "gpio-7-segment"; + segment-gpios = <&gpio 0 GPIO_ACTIVE_LOW>, + <&gpio 1 GPIO_ACTIVE_LOW>, + <&gpio 2 GPIO_ACTIVE_LOW>, + <&gpio 3 GPIO_ACTIVE_LOW>, + <&gpio 4 GPIO_ACTIVE_LOW>, + <&gpio 5 GPIO_ACTIVE_LOW>, + <&gpio 6 GPIO_ACTIVE_LOW>; + };