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 1E19ECF45D4 for ; Tue, 13 Jan 2026 01:20:12 +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:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id: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:In-Reply-To:References: List-Owner; bh=BjXtKmj6aRPnQ9L5xAFt+aSXcUaU00ATQ7s1BIsEOY8=; b=lO6d+CZaP9Gkbk 8STTLAxOGqVgoFGRR7DIi5P5VLEZyYghEIvyIHwXzxo3gW82I7AJMvheAv3Vmfl3d2HziFabMTZM7 CAJYFeQpN5qsB+EydMnBvC/fHRnHZfthmjb4KcncU56DUnRo4KzkkBViv1QF/3J7LIeOE//tkIAJr UXq4Kgjm7LzwavDUiDL4Z2NkjxhYx2w3H0s/JtusDvbxk+CAdty4XN2SXm+HZPIszXaJTA+MjrgIV 5nF7yMnP/DSJZqPJOGC4UzQHaYfd7KEK2K16RiDpuLYt7SF+biBqXfFlp1ZAHHIq0Szg2mRynqOBc b29JNMooqlGEUtgOt4kA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vfT4o-00000006Ndn-04Bx; Tue, 13 Jan 2026 01:20:06 +0000 Received: from mail-pj1-x1036.google.com ([2607:f8b0:4864:20::1036]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vfT4l-00000006Ncs-1TUD for linux-amlogic@lists.infradead.org; Tue, 13 Jan 2026 01:20:04 +0000 Received: by mail-pj1-x1036.google.com with SMTP id 98e67ed59e1d1-34f63ad6f51so2678560a91.0 for ; Mon, 12 Jan 2026 17:20:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1768267201; x=1768872001; darn=lists.infradead.org; h=message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=x3CYlMR0Tmf8RQ5i5U0+ElV7tLxxhG2GMXU9rUaD4oQ=; b=O8l6jzw2rbsblk6VBN8IdxtcVETIHGFspIFV0oAgtyTEnNXBCaxcp04spGE0LbpFqE qiiFLuhVZVgbriBrnakFP7gOi/pVfdowOlNy3Esme81gogm8hNTmlhWttDZV05Eqy961 P4RXedQe4tR47MVwwJLiRAt6GYR0e5Rstc4zyT8jd7s7N8GleyzdLPkYvNi15RRqrLdt Pt+V3AytbtGHfGUwDdCnEPUfCypr64Y7I+f1Rc6dk+QOdEiqFYxlYGx6VdJjY5JyWq/f Ej2O47XKeIOH8gteExkKwTfN77dpqCmWWRTES7dNnlE0paYrYrmNmmOcSmB0qp1WAol/ zVDw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1768267201; x=1768872001; h=message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=x3CYlMR0Tmf8RQ5i5U0+ElV7tLxxhG2GMXU9rUaD4oQ=; b=F0zYpeQKfHGDR+i16nvlu4YU8RRuA/+YAKyfiQd37lXgDXg3diyZ1gmvIsH3+BYSxK I1WScTBp1j7XJf6KFJe3GeMo5nSquhFN6hGHxV6zBsWS+eq2glUuW/CXDto4UmGX+tUz jt/Bc63vo2Ajod5tRXxum2oZJtf+AV2cYO1LjGvuRMfCxjSZAgB9hkqAk3n8M7lYtspA vcbSuGw2+GzvlCOpkvTDJS/76jEe8QFYCGQH+qdGjGFexoUQQ/HlvPm6Is/nJXB7+CsD hpoNZ3hOCnXZFBD1fTWRmJ5fnrpCCoT2YM64WiXjbdKtqT563/9UCU4pKYszWUxejSpQ 0foQ== X-Forwarded-Encrypted: i=1; AJvYcCVfGqaa1Qd2b+9rbIID4cwSKOLvif8WkSxUnZrqgBfZ8ESAs9zGztzWOL45h0EhYjhQcRi9MFRm/ysQLsKM@lists.infradead.org X-Gm-Message-State: AOJu0YxlN6KydXR5G4aJFN7pQGadm+AAjxPuq+JuIm7ynVsZSzOYcMUJ sni2bJPl9WGb8rDTZeYbhR04hgU3hoWKzTjNd1clg1Ke3DnNHb2gDAIJ X-Gm-Gg: AY/fxX7LIfa2QczPXLaK2CZgDjtxn7Ps9Lu03O4na5a5mJJmuCgfqO22fy6cph0YB01 QLZxo5jie9bxPadEOf9MoFZp8X9aPp8+BtdP/yW04+1CSlUEtOUnXDV+/8rK9DdJ9M84nhjUkAo JWALNeE2pWRF24VJV57dLHgK9w8KmdVk9Rrca6585g7IzflyjqcDh/lbmc1a+qIhcOHAsXcgSWt Hn9N/6U6qVVXeer0aUaEFML9IqskKdLKbRaKENxCBNYQSbYhFcE1uI3kCL3aWl2IVrNzvXhBVQ2 slwLqN5XBmPXoBWcKTION0yf+EhwQDk2Rm5iZzA+oSkbKiJl67x7Vhgf33BMavT2TttVNY2Nd8X fu+SDwpg068uRPCspX1+GedfQmtalkSyy+mLIthH9aMs3PTazggLdplDiue+v5G8d8G1CQpXAVo 7wk672bqo= X-Google-Smtp-Source: AGHT+IG8txkoiMCUKW9YZHZofyZykPuk3kA3XK9+QfFe6Sd/CcyTQyE/WnqZnbSHsGDn+shRYOq7Gw== X-Received: by 2002:a17:90b:2709:b0:340:bb64:c5e with SMTP id 98e67ed59e1d1-34f68b684c6mr16514934a91.14.1768267201486; Mon, 12 Jan 2026 17:20:01 -0800 (PST) Received: from localhost.localdomain ([47.82.78.41]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-34f5f7c4141sm18533379a91.6.2026.01.12.17.19.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Jan 2026 17:20:01 -0800 (PST) From: Nick Xie X-Google-Original-From: Nick Xie To: neil.armstrong@linaro.org, khilman@baylibre.com, jbrunet@baylibre.com, martin.blumenstingl@googlemail.com, xianwei.zhao@amlogic.com, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-kernel@vger.kernel.org Cc: krzk+dt@kernel.org, conor+dt@kernel.org, robh@kernel.org, nick@khadas.com Subject: [PATCH] arm64: dts: amlogic: S4: fix SD card initialization failure Date: Tue, 13 Jan 2026 09:19:31 +0800 Message-Id: <20260113011931.40424-1-nick@khadas.com> X-Mailer: git-send-email 2.17.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260112_172003_384446_D09A5237 X-CRM114-Status: GOOD ( 10.81 ) 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: , MIME-Version: 1.0 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 The SD controller (sd@fe08a000) requires a clock source capable of generating a 400kHz frequency for the identification phase. Currently, the sd node uses CLKID_SD_EMMC_B as clkin0 and CLKID_FCLK_DIV2 as clkin1. Both of these are high-frequency clocks (e.g., ~1GHz). The internal divider of the SD controller is limited to a maximum value of 64 (2^6). With input frequencies significantly higher than 25.6MHz (400kHz * 64), the driver is unable to generate the required 400kHz clock, causing the probe to fail with -EINVAL. Fix this by reparenting clkin0 to the 24MHz XTAL clock, consistent with the configuration of the sdio and emmc nodes. This allows the divider to successfully generate 400kHz (24MHz / 60). Verified on Khadas VIM1S with SoC S4 S905Y4. Fixes: 3ab9d54b5d847 ("arm64: dts: amlogic: enable some device nodes for S4") Signed-off-by: Nick Xie --- arch/arm64/boot/dts/amlogic/meson-s4.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi index 9d99ed2994dfa..b87bc83b5a9bb 100644 --- a/arch/arm64/boot/dts/amlogic/meson-s4.dtsi +++ b/arch/arm64/boot/dts/amlogic/meson-s4.dtsi @@ -833,7 +833,7 @@ sd: mmc@fe08a000 { reg = <0x0 0xfe08a000 0x0 0x800>; interrupts = ; clocks = <&clkc_periphs CLKID_SDEMMC_B>, - <&clkc_periphs CLKID_SD_EMMC_B>, + <&xtal>, <&clkc_pll CLKID_FCLK_DIV2>; clock-names = "core", "clkin0", "clkin1"; resets = <&reset RESET_SD_EMMC_B>; -- 2.34.1 _______________________________________________ linux-amlogic mailing list linux-amlogic@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-amlogic