From nobody Wed Feb 11 18:48:56 2026 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 279AAC6FD1C for ; Sat, 11 Mar 2023 18:22:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229469AbjCKSWd (ORCPT ); Sat, 11 Mar 2023 13:22:33 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229809AbjCKSW3 (ORCPT ); Sat, 11 Mar 2023 13:22:29 -0500 Received: from mail-lf1-x135.google.com (mail-lf1-x135.google.com [IPv6:2a00:1450:4864:20::135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E179C59E7C for ; Sat, 11 Mar 2023 10:21:48 -0800 (PST) Received: by mail-lf1-x135.google.com with SMTP id bi9so10767552lfb.2 for ; Sat, 11 Mar 2023 10:21:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1678558903; h=cc:to:subject:date:from:in-reply-to:message-id:from:to:cc:subject :date:message-id:reply-to; bh=zgZZFa9GT3KgzmxYSLg5VRVJ2/WUIFA9QnWnNW5nD4w=; b=cv8Tww7Hl739LopzBthOGhZy4VlB2lYgMNEJ49Af7R8DnMDgc3eQyxpawmtQGGbnJe 25M5PIR2XqPtsEqsMskeyVnSx6yY2J/bMmEO7Ur24ZGeUPehvNgDWHnrcaKCBnG1sc1O iMwgKaDW1uJuSG7fArGJ+u2X4RWggw5RzIy81LlKRvNjIBC+2S46UpmqZv6WywqWP1Wu nmMt1sS6+skpibAwG5HveoUvKXHXhXIjh0+6ditULRjkO68/MCxHUN+ASOm++biOljZ9 r8+4Pd9a9jfXKPpZ39ihqiP9PQpc55/bC10Q3lzP7xHTRd2vzEz0dvEvwz24rgMYpB+h w2Sg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1678558903; h=cc:to:subject:date:from:in-reply-to:message-id:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=zgZZFa9GT3KgzmxYSLg5VRVJ2/WUIFA9QnWnNW5nD4w=; b=qpnGbVC3qUQmc8IwHC97KbnvZazWW9k/1eKvj2VOQDoWOO1yeC2kIg/U6z4iEl4c5m xX5dsLFALqHFIQpolp42KZRNVcWfFBM8MMhMiM7BtY/U4n9XCurTiyMaPBXt1O55lMD3 WuLuG13CpMhJeIGJRd2HIN8e+ouu3F1oElWGkk3uOzktnFe8nzrVM9kS1R2rmzrmoADw cjIZlpoaeF6oQ/c7wCgmr1kkkneCL58oP9ZM5GmWMJvtUTDz87NJBQIR1Rpo+oPYCKFP 75w6rwN97b5xudonLeqmLfmP4Ld1rklT5gn+vscK5jDfGNdYkKvoXiyqAHV8Sl7SWTJe lNVw== X-Gm-Message-State: AO0yUKU5yzDbDx2oPFyttxb8Foe8LYUBQxY7XDZsP2g1Xn9ZrIHD9cCt sxa/es/tW+tIqn1SqyLhsQp1iZb9uMDRt02L1rc= X-Google-Smtp-Source: AK7set+IdgFrYxey9LQTQHJF5c9vczy+XT0K28uYXRK0qnHbMOYdzDbTIGUYhAnWf+Id39ZczlRudA== X-Received: by 2002:a05:6512:24b:b0:4e1:46e9:ec3e with SMTP id b11-20020a056512024b00b004e146e9ec3emr8784984lfo.61.1678558903223; Sat, 11 Mar 2023 10:21:43 -0800 (PST) Received: from 0001-dt-bindings-synopsys-dw-mshc-common-add-fifo-access-.patch (46-138-144-249.dynamic.spd-mgts.ru. [46.138.144.249]) by smtp.gmail.com with ESMTPSA id w25-20020ac25999000000b004e811e3554dsm386680lfn.185.2023.03.11.10.21.42 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 11 Mar 2023 10:21:43 -0800 (PST) Message-Id: <1678558770.495747-1-sleirsgoevy@gmail.com> In-Reply-To: <1678558770.495747-0-sleirsgoevy@gmail.com> From: Sergey Lisov Date: Sat, 11 Mar 2023 21:15:37 +0300 Subject: [PATCH v2 1/2] dt-bindings: synopsys-dw-mshc-common: add "fifo-access-32bit" property To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Jaehoon Chung Cc: linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Some Samsung Exynos boards using the arm64 architecture have DW MMC controllers configured for a 32-bit data bus but a 64-bit FIFO. On these systems the 64-bit FIFO registers must be accessed in two 32-bit halves. --- .../devicetree/bindings/mmc/synopsys-dw-mshc-common.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc-common.= yaml b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc-common.yaml index 8dfad89c7..d025b38ca 100644 --- a/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc-common.yaml +++ b/Documentation/devicetree/bindings/mmc/synopsys-dw-mshc-common.yaml @@ -57,6 +57,13 @@ properties: force fifo watermark setting accordingly. $ref: /schemas/types.yaml#/definitions/flag =20 + fifo-access-32bit: + description: + Specifies that this device requires accesses to its 64-bit registers + to be done as pairs of 32-bit accesses, even on architectures where + readq is available. + $ref: /schemas/types.yaml#/definitions/flag + dmas: maxItems: 1 =20 --=20 2.38.3