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Thu, 15 Jan 2026 01:27:55 -0500 (EST) From: Mathew McBride Date: Thu, 15 Jan 2026 17:26:44 +1100 Subject: [PATCH 2/3] arm64: dts: 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: <20260115-ten64-dts-updates-2025-12-v1-2-a56380bbb2ac@traverse.com.au> References: <20260115-ten64-dts-updates-2025-12-v1-0-a56380bbb2ac@traverse.com.au> In-Reply-To: <20260115-ten64-dts-updates-2025-12-v1-0-a56380bbb2ac@traverse.com.au> To: Shawn Guo , 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=1768458468; l=957; i=matt@traverse.com.au; s=20260115; h=from:subject:message-id; bh=zLFSas7YCXsYAOAsiXQ6e1u69vx7mNvPzVZzPdr1qiQ=; b=HJWk8LxUQ8zZ81AvRm80641xLsA1TdhMt82hQEnpbpSVMcfSVud1oFYQepgOAVPmClj5q/D8X 3UJcYyAzGSrA/QLoc5tcIYIp0WvdLXv27DtTtD+qNYrS/jM9Ux/ptHW 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