Received: from mail-wm1-f49.google.com (mail-wm1-f49.google.com [209.85.128.49]) (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 EE60F3CB90A for ; Sun, 23 Aug 2026 11:53:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.49 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787486035; cv=none; b=J9msDyVcLQ8nMURIL6niEQigEmgR+BKvBpuJZYl0G/aDPwYp9oNVywk8Hq3T2Y3Ccfuvv+TMfoqVHETrs6XConr9ZEnS8onzaTndjLghlfnxKwys/sLPDe/ZXRtldhl23nFqkt4SS4IDTTiyAdECcVcYMUUT+UPdSauC3+hrqBo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787486035; c=relaxed/simple; bh=dVv3havpeDsTBU4IBCU9QgSQ+lf39jAeKDEpWEAl208=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=qEFDv+Qo/pZrm4Axkmu2WHqwkD1nDY0pkuNREcKYW8XHjwbqFEQVNWvvUoaQYkm/+1r4EG9uOcw1CyvUGvFfidM0Qp2Je8EP0bz6sczQrSa1E9b8WgPuR24hJtivv1iH0ZgWHy9L8ETxPh14SMxfs6MbZF1hAo6iSzTsX0AF8YU= 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=209.85.128.49 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-f49.google.com with SMTP id 5b1f17b1804b1-499b02fc590so15658555e9.2 for ; Sun, 23 Aug 2026 04:53:53 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787486032; x=1788090832; 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=7jThRiaQ/26wqHZ1vL8lEl8IaaxJS8aQBBZUVqHcHFM=; b=KU6kGNrsv6j7/ilEQTCfAki+DG+ajEq4SOBNn07VIRBecxN+lDZgw39Cj+Ou0bGNt5 Sl8YQkAlt4ufzFmi18+a02jZdRg8T3NZZfoZBm1fpCrQrNk1Fx7W8fA4p8YLs4RwWfIg FzfCM5F9hBH3ainlgUP8kLml3PJXqd9E3EE6I7tKf/BXwyvD493WaJYLLrjEwoGyqDUv zch2YfYiDlQQZjsNk7mFIQ0cqdm2urIpGfygzvV6mHyXynbz57jBPzuhB1/F8mzjbTRn me0zIhk5SVH/Ll82TW+zMcWYJPvisotZpwaF+XyQQsSaORNi346+wzVoAp/XGdT30GrY h57w== X-Forwarded-Encrypted: i=1; AHgh+RpUccnzKfuBgtno8VSZU+Aril5VmzQYBCtjQUiHXN1D3isiLdej5xw19Tj+aEEwpYVs++/h47W08VfV@vger.kernel.org X-Gm-Message-State: AFuF++l1iezxY9fiRvM50DplbO1ZLLDoAQpxBHLuvjTIOB+0Bztu1PEc XHDH7YWs7pB0HucZtcws1T9OR3AHWKlfRxySChVsKbHjIT+rhqWVH7sK X-Gm-Gg: AR+sD12siyEx+D3xRQ2QzR1rSNgieeYKZQXVgnh2WGQ2ateAdtyMwPWICAUykyCQPUo K57NCJbCn2adlFAOf+vQ78PnsHpmHvJqYjn3p7xpdu++3qm6fP7VrydFgwO9MuTr4KgekP5VBck PEljaWYsQNGxv8+MXrDs6k2yQXM8dNioKKx2JSmZVrS4WadXC3CuFehd6GQZCENoLhv7pXQBEZE fnhxzNP2KW2qYnIarvVIH3YZ4y1P2yg3f3j3DyxD8mENgcrO5qFEjuQ2PttHjqLdWINrsZu+uBa LNdGRZCHOImewi9OsfI7AeXAAZlePZv0Gs8GkLaQkqWSySpqHR2uOcjWXUFGJ2WQgxGkNDRyvz3 diwHKuLK6QsbskciF0NxoxCMyTY/HKmGvOO4+88v/njgqMcXink5zVaarS6CUu5I8uzUPZGD9Le y7gxo7bWqffpNnW0j05x7jRHq7ifhP5+QDW7TJVXMzpUXVJYoWQd4E/dAdjjPuE1RwSR1MsbdBk nEvZmQE9kpMLPvVfbrZyg/OfppniSyJLGeimK0= X-Received: by 2002:a05:600c:6296:b0:495:4d5c:903e with SMTP id 5b1f17b1804b1-499b8327cd8mr242910645e9.7.1787486032189; Sun, 23 Aug 2026 04:53:52 -0700 (PDT) Received: from threads.localdomain ([83.106.158.114]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-499c355e1ddsm48680935e9.5.2026.08.23.04.53.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 23 Aug 2026 04:53:51 -0700 (PDT) From: Lucas Tanure To: Neil Armstrong , Kevin Hilman , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-kernel@lists.infradead.org, Xianwei Zhao , linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] arm64: dts: amlogic: t7: khadas-vim4: allow the SD card to be power cycled Date: Sun, 23 Aug 2026 12:53:35 +0100 Message-ID: <20260823115335.102219-3-tanure@linux.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260823115335.102219-1-tanure@linux.com> References: <20260823115335.102219-1-tanure@linux.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit SD cards start at 3.3V and switch to 1.8V to reach UHS-I speeds. Some cards refuse that switch, and the SD specification says the only way to recover is to power the card off and start again. SD_3V3 is marked regulator-always-on, so the supply never goes off, the card stays stuck half way through the switch, and the MMC core retries forever: mmc1: error -95 whilst initialising SD card Drop regulator-always-on. regulator-boot-on still turns the supply on at boot, and a card that refuses the switch now falls back to high speed instead of failing to initialise. Fixes: 8c45bf9ae4ef ("arm64: dts: amlogic: t7: khadas-vim4: Add power regulators") Signed-off-by: Lucas Tanure Assisted-by: Claude:claude-fable-5 --- arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts index 75d81ad6830d..c94afaaf8826 100644 --- a/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts +++ b/arch/arm64/boot/dts/amlogic/amlogic-t7-a311d2-khadas-vim4.dts @@ -71,7 +71,6 @@ sd_3v3: regulator-sdcard-3v3 { vin-supply = <&vddao_3v3>; gpio = <&gpio GPIOD_11 GPIO_ACTIVE_LOW>; regulator-boot-on; - regulator-always-on; }; sdio_pwrseq: sdio-pwrseq { -- 2.55.0