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Fri, 6 Feb 2026 00:26:23 -0500 (EST) From: Mathew McBride Date: Fri, 06 Feb 2026 16:26:13 +1100 Subject: [PATCH v2 2/3] arm64: dts: freescale: ten64: reduce maximum SD card speed Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260206-ten64-dts-updates-2025-12-v2-2-2d77f47a89e7@traverse.com.au> References: <20260206-ten64-dts-updates-2025-12-v2-0-2d77f47a89e7@traverse.com.au> In-Reply-To: <20260206-ten64-dts-updates-2025-12-v2-0-2d77f47a89e7@traverse.com.au> To: Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Mathew McBride X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1770355576; l=957; i=matt@traverse.com.au; s=20260115; h=from:subject:message-id; bh=zLFSas7YCXsYAOAsiXQ6e1u69vx7mNvPzVZzPdr1qiQ=; b=g5OszKesyImhC0mgmOQgHoww4sPV1OyqVu4tMfGY2GUzUVW/8PoSJtaqORKskmr0DepmlFn6i KDEEXfD6lVRBpUFMoqcqtun7IXCRynGPOoIUuaV6UHpyL1QVi5tNk3L X-Developer-Key: i=matt@traverse.com.au; a=ed25519; pk=SM+aGm9Y2fPJ2prfH/b5lab73fTBrKL5UsJwdzv7Pbg= There have been user reports of timeouts when using certain SD cards. To improve stability, reduce the maximum SD card frequency to 25MHz. Reducing the maximum frequency will disable most high speed modes like UHS-1. If this issue is resolved in the future (by PCB change or software tuning), we will apply fixups in the bootloader to set the correct parameters. Signed-off-by: Mathew McBride --- arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts b/arch/arm= 64/boot/dts/freescale/fsl-ls1088a-ten64.dts index 35470c0a928f..0a460eebd636 100644 --- a/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts +++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a-ten64.dts @@ -261,6 +261,7 @@ mdio1_phy4: ethernet-phy@1f { =20 &esdhc { status =3D "okay"; + max-frequency =3D <25000000>; }; =20 &i2c0 { --=20 2.51.2