From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f51.google.com (mail-wm1-f51.google.com [209.85.128.51]) (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 1497A3CCA19 for ; Sun, 23 Aug 2026 11:53:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787486035; cv=none; b=kGIspRyOfoaX4Qtm9gHKpOlRGnqbbW/ZrRZ8r6hppLSnOqJ8ZXBGc9Umd7zFPKCKFZ8qXa1s8K5D7dJZcQjaNpeK6QDKfHLbvD4n5hIS2WwtKHQIfM/uWQRd4ZuTYB1SnKEuv9L+pTaWd5pw8X2on7jXlT/+HobDAeaTV7mIGR4= 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=209.85.128.51 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-f51.google.com with SMTP id 5b1f17b1804b1-499b6c02b02so10831745e9.1 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=gnns+YNe51X4qApYFof5b78Ujvp3crJB733U212qhVzKBj0YJ615CZTedB44/9BoK2 9R7jxt/NSSBwcRrrK20VfeDx5wB0044g2yLGSe7P/q8h10vE+0b9M+qh449GdaQD+XUQ k4H7L3rz+5hF8nhTYIoDZqZHNzgKWApgGw1+tEh1TlHNmqHWX+KJETj2RrkeusW7ZEks T1Qf7Sag1zc4FIv1QG1fBAywB/MaUfvdFpXIgkfquE1J+ijoH/MgjEWA5CHxEF/AmD8B J93XnNWXa4VnGs9xJIA7SnjtWPt/uOvodXFGPx27ZJN+xfwXc0FAV17lEDC0Nps8xJj9 cxRw== X-Forwarded-Encrypted: i=1; AHgh+RpJwrZU9j/4iNv9ZnmCL0aAOEurkokYL8MH5XHGOX0sT9OPhhLnmqJW8VsoGOsLx+/VxK1M01u5p8epNyM=@vger.kernel.org X-Gm-Message-State: AFuF++k2IhgTmp11l0IW3OrSy+P0fS+/w8Hfli3mLLLssVDR308TNWPo PzQhPkxPFBAvtZRpk9mscDQNv9L2DGF7PPCsppl7o/HR1QwsKE9FgDDo X-Gm-Gg: AR+sD117dbrItlDhddQqvW49wkIBVKyTy98pMK2UTwiPGME4gN9bAApzajZ66O2Le7K 1dB8qsFibzrBXh33t3BmUeJO8prAEt7t2QNOuZCAsNi+y1i3t0klYq+LLTM+/eoXmHTMQhRi8OX 0pQr5cKWkQApxsC1M/L3BVBrGu2F5KY9GqS5XeOXKq2AvjZBpdFILc8ep/e48MGjt+NO5sHelrD qmicF64sTFgxL2/gVXZ/pq4te0rrlI/EejVoYMvkQwsuapzanKmUATN1lQ4J+1SRpNvSnSUR7UT 1Aic1ZS11IvLiCjJPzwtMhiKlERaNipazXXc1ADhJE+8AYbRp79obyPXie9vDSHWlfiOAS6Z/D2 C+5V60F+8rahpe6GX3fz6k74JvwHmeqjEp7xdtKZp9fPEcYNh7gpFGV3w4d8VMfFBw+7ma4iytn yD6YS0Q8oq0kW6aQccI6oyfAOxfGgiddkz2OIkpPLLEtYoy5isobO4afPEPXr4+1l/G+6MKs7sg FpmnXqyOh6OdTZIo9AD198vZkkduvdv3DS2/uk= 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: 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 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