From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 38022390CBA for ; Thu, 3 Sep 2026 22:59:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788476371; cv=none; b=uYciyfpUJNOxTzNtjWJaCteVUoA/6gmFQ142ONMgtFYN9vZh/JuVmO/hRXAOpqOHu4e/ftCcFlPCDOQi5wutBRJ/RudRtGuDDjQFRHubXmnpGIanR6LmYK7DMn32O8aCefoDsgJKA1Cz7NW9l8OdO7EIE0AeeG1xuCXy0942v9Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788476371; c=relaxed/simple; bh=7IyaqAJGrLFMzdCPym0vCbn9/e7JQnUZdtNSrU1p8VM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WjkJNgdY43P1YyczDoHZtVo8iVpN1bPdDCjnC8t9CF0znT3Rehw+659NoBaabzFg6q3C4iHNB65aGPPZUTms6DrpJQ8Sg0EEKQ9lw/IhFjFSQc4+NwvaxaxYUz4EsL6QbgtGqYwMD4+IGHhingtLr/Uq4U/XkvUNXHXHYiFfSyU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.com; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-4921eed3fa2so3327875e9.0 for ; Thu, 03 Sep 2026 15:59:27 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788476366; x=1789081166; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=SYr0H8H+3w2Nj4aKKiG0KJqnlsCXDI1Lpa8vdufXlPs=; b=DLKgeyc+OoPbEZBLSVlKmmj7eKeNFBVt9NbYPFU8jqN+PJ0JvTB93cTtsqrep9jpJK leEGMycJLR2lO4/h0vAFZvkDzhoz1GMqYb9tDbdijdzu6fB55CPIZs5b+3fEISfHKZVY O/yzZ7CceDLyC6DX6Gyg8FVjF4UoQaJ3N9h0KoNjadW+fYVrPoNQzb7V2hHtBpf85db9 L8Q7+p0giOwePdHDvRGsFntcX6Lj73gDp6QEyqIkgnAqbhQIpAwZN8umtCLYwfyINN2Z 2bXfp+u843IA28XkJzrJACpTEyjOk7k9NlPCMX0nncGejQiZNnxQI2P0DY4SwaLpiAUM m7Mw== X-Forwarded-Encrypted: i=1; AKwUvBxCZSXIpA9wXprDIPnJX7VfxNM7/Y6hQL5ZGmPt30pnChDIId+76nXV1KNRQrbWiMYju3tk7GRaUFoFUa0=@vger.kernel.org X-Gm-Message-State: AFuF++nwLFFNV+6JYrDaVbwd/+SlOsHC5QhqR1N8i05sDbdjKNmjzo0h YoXHmia3T52o4S4x7JkVy2gJakKDfl/7EETiiVT3LvlMpOIHbthHjDAQ X-Gm-Gg: AYBFou0pDUrhgE5myzGeKsaTSWb4duGKN4N0ezjtl4qz9if1Ssf4R5nGA3Ubc6YxRQ4 6/aUYwZMLOKJBWNe1H5NNq/zVX866P70fyHmtNeUxvkvcaWkOGXwhGbtcgCKWExEonKLfNRcOsX /4P+Syf/+D+Y+rOAOI55E/mb3b71a/sv9WNrdJv8cCwyZPqpCIiahQjbvwBRSEo7EvPPrLUs0cG 5C5q6INvOO8jmr9wQYj4MfAce6wgU0NRro1ytWXlSWlX0Pd/GXYLYdDRMOH3oNuOTqx4knnk1tO zQqqxvm+4WqZlG6NgSkkh68BYf1ckBy8l39FGSFC0aIgxAXZiMvRcpjerhg5gaKmbZL5RaSfIUk RivlvOk9OjUN7Wkzgunu/MYMZOgpW4w5bbZlfm21XM2fINw6ZTpAex12a0XwBorTQLe7S9llV/t neV64xyx8nO4NPg25x1vF8V8Y7KefZ0XmK46d/+mavZ9FGfM6rTDnVJGWA2n5Z/vRucSBkip/S5 PPQnemuqrZsSHZOH1rgMeVUFA== X-Received: by 2002:a05:6000:2010:b0:485:8a47:5b92 with SMTP id ffacd0b85a97d-4858a475dadmr290268f8f.47.1788476365986; Thu, 03 Sep 2026 15:59:25 -0700 (PDT) Received: from threads.localdomain ([84.68.179.181]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-485885c5bbdsm1686142f8f.36.2026.09.03.15.59.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Sep 2026 15:59:24 -0700 (PDT) From: Lucas Tanure To: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Jerome Brunet , Kevin Hilman , Martin Blumenstingl , Stephen Boyd Cc: Brian Masney , Chuan Liu , Jian Hu , Ronald Claveau , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Claude Fable 5 Subject: [PATCH 1/4] dt-bindings: mmc: amlogic,meson-gx-mmc: document the T7 pipeline clock Date: Thu, 3 Sep 2026 23:59:18 +0100 Message-ID: <20260903225921.2290441-2-tanure@linux.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260903225921.2290441-1-tanure@linux.com> References: <20260903225921.2290441-1-tanure@linux.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The SD/eMMC controllers of the T7 SoC are physically far from the NIC_MATRIX bus fabric, so the hardware design inserts a pipeline stage in the middle of the bus path to help timing closure. This stage is fed by its own gate clock and, when that clock is disabled, a controller that starts a DMA transfer can never complete it. Allow a fourth clock entry, named "pipeline", and require it for the amlogic,t7-mmc compatible. The other controllers of this family keep the existing three clocks. Assisted-by: Claude Fable 5 Signed-off-by: Lucas Tanure --- .../bindings/mmc/amlogic,meson-gx-mmc.yaml | 29 ++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml index 976f36de2091..12342b1d78e5 100644 --- a/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml +++ b/Documentation/devicetree/bindings/mmc/amlogic,meson-gx-mmc.yaml @@ -15,6 +15,23 @@ maintainers: allOf: - $ref: mmc-controller.yaml# + - if: + properties: + compatible: + contains: + const: amlogic,t7-mmc + then: + properties: + clocks: + minItems: 4 + clock-names: + minItems: 4 + else: + properties: + clocks: + maxItems: 3 + clock-names: + maxItems: 3 properties: compatible: @@ -38,13 +55,23 @@ properties: - description: card detect clocks: - maxItems: 3 + minItems: 3 + items: + - description: core clock + - description: clock input 0 of the internal mux + - description: clock input 1 of the internal mux + - description: + clock of the pipeline stage inserted in the bus path between + the controller and the DRAM. Without it, the controller cannot + complete DMA transfers. clock-names: + minItems: 3 items: - const: core - const: clkin0 - const: clkin1 + - const: pipeline resets: maxItems: 1 -- 2.55.0