From patchwork Thu May 11 23:13:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boerge Struempfel X-Patchwork-Id: 680984 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8B883C7EE24 for ; Thu, 11 May 2023 23:14:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239441AbjEKXO1 (ORCPT ); Thu, 11 May 2023 19:14:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239385AbjEKXO0 (ORCPT ); Thu, 11 May 2023 19:14:26 -0400 Received: from mail-ej1-x632.google.com (mail-ej1-x632.google.com [IPv6:2a00:1450:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A87D65BA5; Thu, 11 May 2023 16:14:18 -0700 (PDT) Received: by mail-ej1-x632.google.com with SMTP id a640c23a62f3a-959a3e2dd27so1649526966b.3; Thu, 11 May 2023 16:14:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683846857; x=1686438857; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=k1YaV1mLf8ta46NqCsJ+gUT1ajmBoG4/m5hmiu17DFk=; b=JW7oR2OyYZ62rFL5P9pzdR5DWFAgrbpzmJmlxoUBxtWRZOwPmOahMp5o43VaHDUlC4 pv2mkhlpxKEz7e0vvrVa5PICdu0vXUQVH4KIGVX/R10DkUsGhjESdrSlH4USgc2TADYZ 9SKUEboWvCPdVXNIsUzgiP8/Ks8xAvdEJLJGcXqpF2OYsNNwcPNWhdEFrpOQ9n8dtq8+ JE7sUgrjFL4lTvfjuWGtP8DGIOv1vO3GdXUl+qdOaUbcKJzPQkKieF4ub8t6tv8TP61Y dmpg5Uq6l3Il/z6HPcMxu3R4R0lGRY8s6X9Qm2ZTAOiuSn3I/ta9ZMuR2y9gcmBUmuVY Pitg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683846857; x=1686438857; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=k1YaV1mLf8ta46NqCsJ+gUT1ajmBoG4/m5hmiu17DFk=; b=XDH7+pCLGDjjacJv20rR7rCyI/H3RJvKF1hNsXZDzkd8E9wb0clJK9v3u0kMlpkOvb /pgxbjQzkQoCDy0Jm1Uv3FmOKbIMPH43EyvGd4TzVkzaDOx1vQKre9pEnqeGYGM1XjV2 xmQmXO904efQjRWqGqs4cQuTspetSTCGVBC7G/q2aeKE1voarCfabQ1mfhUOja36091Z GWJ7SiM5r6gr831XPctibl3cED6RKJRqzqsoDRiQzPABilWUtLkS8AerT9RU22tC1WHM 2oFWT/U+bPKa2eiDWKfGBXzUrmHSkg18C+SYGn+Lgpy6haEtLPu32trCizd6gataoq/v 2tsw== X-Gm-Message-State: AC+VfDzb2hAiAHwcRmh/Bv1W3q6pp6Likf24V9J1n0X48BtQNW9LaoEH fr53agzCeBeB+mSBvAVjSuw= X-Google-Smtp-Source: ACHHUZ4zTQ5dUIsmJG0DHK5HLv1IgcRBZF+6ZtK7r+B79fL4gxSiCG5zBaSBtGGy5N4YjlOXhR8GzQ== X-Received: by 2002:a17:907:a407:b0:96a:928c:d382 with SMTP id sg7-20020a170907a40700b0096a928cd382mr986215ejc.48.1683846856728; Thu, 11 May 2023 16:14:16 -0700 (PDT) Received: from wslxew193.fritz.box (p200300c7874f2f0049cdad3080524d03.dip0.t-ipconnect.de. [2003:c7:874f:2f00:49cd:ad30:8052:4d03]) by smtp.gmail.com with ESMTPSA id hx8-20020a170906846800b00965e839f56bsm4543023ejc.182.2023.05.11.16.14.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 May 2023 16:14:16 -0700 (PDT) From: Boerge Struempfel X-Google-Original-From: Boerge Struempfel Cc: boerge.struempfel@gmail.com, bstruempfel@ultratronik.de, andy.shevchenko@gmail.com, Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-spi@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 1/4] spi: dt-bindings: Introduce spi-mosi-idle-low flag Date: Fri, 12 May 2023 01:13:14 +0200 Message-Id: <20230511231317.158214-2-bstruempfel@ultratronik.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230511231317.158214-1-bstruempfel@ultratronik.de> References: <20230511135632.78344-1-bstruempfel@ultratronik.de> <20230511231317.158214-1-bstruempfel@ultratronik.de> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Some spi controller switch the mosi line to high, whenever they are idle. This may not be desired in all use cases. For example neopixel leds can get confused and flicker due to misinterpreting the idle state. Therefore, we introduce a new spi-mode bit, with which the idle behaviour can be overwritten on a per device basis. Signed-off-by: Boerge Struempfel --- .../devicetree/bindings/spi/spi-peripheral-props.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml index 782a014b63a76..46d5acc1fc232 100644 --- a/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml +++ b/Documentation/devicetree/bindings/spi/spi-peripheral-props.yaml @@ -34,6 +34,12 @@ properties: description: The device requires the chip select active high. + spi-mosi-idle-low: + $ref: /schemas/types.yaml#/definitions/flag + description: + The device requires the mosi line to be low when idle and the + chip select is asserted. + spi-lsb-first: $ref: /schemas/types.yaml#/definitions/flag description: