From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f47.google.com (mail-wm1-f47.google.com [209.85.128.47]) (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 61EBA3DEFFE for ; Tue, 18 Aug 2026 19:12:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.47 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787080332; cv=none; b=KwvPziOGpTN0cO1G6OY3UgCVdaRGoR80H7t7cfljZqdjd+MpDgSx40TW9Gf+1EAh1YLhoQHQeh9OCfxr68Pyh5no6GaPVSCtQV2B1iC03jrWjh9Z36Y/Ju4B6+CB/ETxFFUNig37z+kUN+hlWGTZO4LeHZcRn9X3rUqYPgSOJbI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787080332; c=relaxed/simple; bh=HO0+RPkmv/54G5SUNBvVRzpPmMsibWjHar2qhfMCDh0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PVbA1juQOyABxIMRVxPQkgfLIYiG4weZXxz5md78vq8LfdGNVKCWS24WzQy42mTPtkoa7t49vx9ATqimp7plAoCxwTkW+X1K/RZyUusLjxnFjT5u8jt0rvSq/AIxWHxqQzY4ZgAw1BKBBYTyjrNk2IG+2Db/6wCd0fVdwA1/zhY= 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=209.85.128.47 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-f47.google.com with SMTP id 5b1f17b1804b1-49800c6a846so1854725e9.3 for ; Tue, 18 Aug 2026 12:12:10 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787080328; x=1787685128; 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=CMPOR156M0mqts600G+VeeVQ2Hm+QQSFhaSBmB76XDc=; b=WZuGhOad93A+22YV45WXYM2cN4B7Gd/QOrqUYaXjoWG2oGmpPRFkLvHcOVPByvUU/D vErep2zcovSdT4nfwAJqNBjrp5f5/SZmAWrXtzzhP/QtLzPjkmlD0vLYC5GtKif1w/81 i9fYDlp/pQQSxmJwQmHoqZl4pQwW9YSaiFV+/OyhIC9MP+G24feRAe+US+wkZIjc1kks 9K0mVYzRQ43OCDdkDhSLwWRcX8isaG/SOh8dN/Gi/y/h+cvZxqabAOHi+eTRbBkq4sj7 5qXbH6Y3zjT3Xm/QlI1vTLmW9fuLy415cIMe6GHk6XDPbkeTFCrSTjvtUk2YcFA98Utc jfqQ== X-Forwarded-Encrypted: i=1; AHgh+RpASsz9jipu8Ev4T7R/eb8U5zuf0NpoP9n8ljYdxr9lm5FlFNfuifFh0NOtoqc+z7A3WbhFULFavHri5IM=@vger.kernel.org X-Gm-Message-State: AOJu0YzenA6Vo58e0VvQtoisG627vtkTGug/x9J4fIkGoTvoBEV+o0ax xHm8ZjhGIV7q355HdREMTP4zwspxLFknJP+49ZMT+0GjbgaC52Cpfo7R X-Gm-Gg: AR+sD10VWOhUHKbZrKZzezlYsNWOnmyuvKhVrZ4WgUuwpghLr/TdGUWy5oaRZJXN+9t vuIC6Zq4bv0UjxIahXLruyE/KbgQexhI7ogPWtDEIcWi7/2AB0jfEGJjHUf4pwESsWil7s6DgoN 5glDAeCBi/T2aT2ekwS7kIjn/s97wAFV1Wc011jnVhPpM3enG1uneCKsfKUORgACHcPgnvdZ3zx KQ8VObB4dt6R6OPfvdkJNMhE2LZjuYFQykxfLc54mbbJGFcEeT0+V9095AFFxrsfJg5XSM2Jk/0 hPkucSU8UDzdQVynrzDAwFV/6keAoS5Er8LIeRR4uqiQcWlRaiVZiOrKrfooxBaxrIlVZNiLHPa 9SH+rZqaL4RF7W+0UUCQKSlmdS4Aik3BUIEauylFeB4Kh0I0FcDYZ0iKa0bZ8NDei1QTfHzqxI4 DBrhpB9trl0CV5L1wz6dA1RCRaoTOKxkkFCkk22rDEwn5uovhDbsofN6GAMQbHX0v6/q9mgwNuQ 7O8fz4gVgGrToypWJuOyTsfkRA= X-Received: by 2002:a05:600c:5253:b0:499:8ae1:b900 with SMTP id 5b1f17b1804b1-499a8fc25eamr3729925e9.12.1787080328303; Tue, 18 Aug 2026 12:12:08 -0700 (PDT) Received: from threads.localdomain ([83.106.158.114]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-482a5b783c6sm14673154f8f.31.2026.08.18.12.12.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 18 Aug 2026 12:12:07 -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 2/2] arm64: dts: amlogic: t7: khadas-vim4: allow the SD card to be power cycled Date: Tue, 18 Aug 2026 20:11:59 +0100 Message-ID: <20260818191159.11523-3-tanure@linux.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260818191159.11523-1-tanure@linux.com> References: <20260818191159.11523-1-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 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 677069e58f30..3f53630e107f 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