From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DCECCC5DF88 for ; Tue, 18 Aug 2026 19:12:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tvVCucHuelOocQCrQXRxt12NlGo7xsCxM6t13Aab7Aw=; b=uEGZaYCMzU4GBp PNnV15JOKkeygTTOKHZx5zQM4MX4mLv+k9tBbyEpNQUDT6JRRd0GYHBXpWF7sHOPkjvJltOCamgWo b+ZYk8vGnwk0J8uyApubyJfWTE2tzFfY6x9hr8V7gzEwadiz8BtwupkmIg08tHaTd/z/ifaLRG255 AAJ6BW2/PF3WOCe2/VSzm51CpBPFoeYVMbSukO1OxyJpDmR6J0TQ9Y1FQlJKPJTh3SK0f80OKkjVf 7Hk70isOJrm87l8U5x8sDVNrx7zJclWA3smDWHU8tFuGi+5f4MEAXbDnBKEMt5vzgpy0/73osvSux lSVNFPHsEZQD71aMl/2w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wwPEN-00000008Z0Q-0E0u; Tue, 18 Aug 2026 19:12:15 +0000 Received: from mail-wm1-f41.google.com ([209.85.128.41]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wwPEI-00000008Yxk-0h5d for linux-amlogic@lists.infradead.org; Tue, 18 Aug 2026 19:12:11 +0000 Received: by mail-wm1-f41.google.com with SMTP id 5b1f17b1804b1-4953e04ef16so2035225e9.2 for ; Tue, 18 Aug 2026 12:12:09 -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=Y/zre8hnplQcl7zkiVIO80G+S3RaJPgkG1G0Ff+ciLMdJEAy09FsWGjf5fDYHch+0q ra5IvERad/ShReYIu3DYTSmKyvkHagltB2gnYt2BEfoAi52UNuypNVQL7y/MAWRXOZ7X v5rnPNmkjWW0nssO0J2/CoryZsGnA7GynLofZ4S4Dz6o9beekqxuI2TEJ7Q4YmJu4tls ixkGVYvj2JF0SKqXchfcDGuUYovlPYuILYpBbIVP3EnXdVduy2mwlrvjzvhxuBko1IG+ 8Pzv9GpFyM2l83KoguRXfqkCBbog/ioXrm++aFi1XDApEIfMl6f0ERlr1JB0sYrOqzlE gjlw== X-Forwarded-Encrypted: i=1; AHgh+RoPGf8gV+1c+/7tw5Y7oQz7r9Z57j0A9Jx9zfn07NYV2FeqrBMvjJBEYVqYt4ciudpypSlyoVggbgVExFtW@lists.infradead.org X-Gm-Message-State: AOJu0Yx92xB/pkbeVl8pRhDVAINnQXE4ke/baWYaMM/gdvfpAu14R0TV NXY6hXhss2SMakfJCKwGMrdLAIygqTBJNJlw5yZr7UpF2tA+JPXFr/vF X-Gm-Gg: AR+sD13GJmWNYJzB/DgYfCXTrnKBjJYOSnpLMh01pOWi/dz79skXbD8m7g97C4kmi/m pMrHtDBWQ2y+cBEehy+4aipFkYFCINf0OcHorBF84OYLkEWK8RhJyuvVNovPEZL1mzfP3WFdD5d z/tMoDvF23KUeolY3JpVNBmE9R8V5mZQ7YsJsUE8rCupJJFMR+Z24flbkDiHiCBFekiaLH2qZq7 eJ/TcXaz8PpJQsNEMOSgqo8aERNrh85XIdUGP1LQwjI2QoZdiGYp+W/9JprBM++gvKTtOP6SXH4 GZfcO7MzIPPtnrjXWVmp6wWBjpT7pa3noJvwlVy6yuZ5AU0RyrtX6N+3XJZ3wHNlC16Zl0sWEKE Or2nTSXtde7F3BZWiX3vhFzT5iuxTw7r0ChltJZhNG+XaBshrV54Fj9Hew642+uvLzPx5wi8+WB TdrOXRW1sVRBb6xOcAkV6keGRgjSXdP9ebx9kGz2EfTxHPihDkN6Kbh18WXjTnkVq7wcMf1IaoL t12XadqTqlZNWa5BrjkX7RA2uk= 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> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260818_121210_213870_3D46A3D9 X-CRM114-Status: GOOD ( 10.14 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org 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 _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic