From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm1-f43.google.com (mail-wm1-f43.google.com [209.85.128.43]) (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 5ED3A2D061C for ; Tue, 18 Aug 2026 19:12:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.43 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787080331; cv=none; b=ufdQuzIq7NLVigMBpd4VcuXOF2kdLr1HsaJ5Hm0tc88+vPi5SzGdXuTkUWF89iZKCQFMWCJUuK7FZCl/CW9W9JtSOFnmq73fnpexAif6YMGJf2R1CqJIQVmKAG9Q0ADc69mNDBWnweG2QlxKiif9IeC3KkhnuFPGSx7dNPSULW0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787080331; c=relaxed/simple; bh=HO0+RPkmv/54G5SUNBvVRzpPmMsibWjHar2qhfMCDh0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SRVg8Cq5+CTszvcvzuzv6bs0xX2ADnIecfWlRaezVXLRLZxGWFfcIh8XJXqK4FYaZkBkP022FakwWgJT6trp8QRUPrRHR5EE/WQSWv3nwfiERA64HPfzqly4Td3zvRPRv4nTJnyFm2gtjuW3mNDuUBwnKI1+t+Enu+pjlY1CdAE= 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=209.85.128.43 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-f43.google.com with SMTP id 5b1f17b1804b1-4954dff6536so1703035e9.0 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=Ad/h9GfhetZqQ21y9oZQbG7ZUDqXEY+BmobCXU89k/11xK7wTVWhLHU4r+wfkVtX3e dmbhRbqz+RfJWvhwWb3uIlincOxayMmIwOIgUthaopEb8ROoPklb+MlCUmU9uJfJc9fg P2n3Q1GC5Azcwv27f5LijXdNoV2UMO6ILxqLhbihtiCPwqCCIyO9nhS42x/siz72bKfy TiWXbt8gUeWqd983aLhzEvMeYddD/1vE28lKPZsiWqgYAWMYOcqlPhACVTqgMtzk32Md 4q/YrqaIs3anocPF35vsXY9XiXqNp2FFwJHdp0oS9zj8il/CUb8X5CEabRQ5gIeFmCzq gIeA== X-Forwarded-Encrypted: i=1; AHgh+RoP329ig1Mi2dO29f/KqUCyNfvqX/ta5HP2fqrbiKF9gQSvaI/3EVf1bUIHBTbw3YIwXuS5np8/CZ9m@vger.kernel.org X-Gm-Message-State: AOJu0Yzkrs8imBFbA5oXKJqPTb6073s9n3aRdKgKRjOdd1h0x1b91j5G kHu9ud11dTK76P6sax2vNwdpgeYgRvkIkgJY9Wa/xgFBBJ+iZv++9dYG X-Gm-Gg: AR+sD133WiI92+dIpS/u4CPYMSO10R7NtsH5q0ziLBgQ/3NqT/pqgyVNN8lF6oFX03i Dz9Yh0Y/4v0KhOiauHYWrvkomFo/C+qiax/CvNFRNQzrS0pfeh23RT4mlKbOUoZ35aCsp9YZ9mJ /SQKJ8AxOY4qDLPINIgAwMIn3fopLnRc6k4Jiu0rr+bqq+scrAnYZ54JDD8UVRsbcgz8QDm9eQ4 5JFOPXNrnl6NRn+ix5yiPi6hgrEDX5Kk19Y6jag6qauxsXgJj1mHesvCg8MPtkzGqjjCsYaQUKI cFSDWbOIKldib9k4QBIOy6ajuaZZcpJat6MbpS/ydMPVaD9Ed02oLSPYiLuLhupY1yPF6r3lr0s pKnQ2UGcScTcTHl5ASxlz8mZ3ktPPLgiivdN01yfO2E9WMNAaTsbqABXIts9KprfoJs4jfsYR0L vj8O2GH2YRblcoySGM57IPTRMRs3TfkV7ZkzTo1MXaxEQFMylVrinccC4lPmnxItpGaS+NOgzKM 3OUiYbVa9Xrr1ERlkk3vv2Yjzg= 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: 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 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