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Tue, 06 Jan 2026 08:22:27 -0800 (PST) From: "Markus Schneider-Pargmann (TI.com)" Date: Tue, 06 Jan 2026 17:22:10 +0100 Subject: [PATCH] arm64: dts: ti: k3-am62a7-sk: Disable mmc Schmitt Trigger 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: <20260106-topic-am62a-mmc-pinctrl-v6-19-next-v1-1-1190ac29aadb@baylibre.com> X-B4-Tracking: v=1; b=H4sIALE2XWkC/x3NwQqEIBCA4VeJOTeghgPtqywdzB13B9JEJYLo3 ZM9fpf/v6ByEa7wGi4ofEiVPXXocQD/c+nLKJ9uMMqQ0oqw7Vk8ukjGYYwesyTfyoYHoZ4x8dn QhImtpSmsq4UeyoWDnP/Je7nvBzcHj4l0AAAA X-Change-ID: 20260106-topic-am62a-mmc-pinctrl-v6-19-next-2f3e5563fbb5 To: Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Sverdlin Cc: Vishal Mahaveer , Kevin Hilman , Dhruva Gole , Sebin Francis , Kendall Willis , Akashdeep Kaur , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, "Markus Schneider-Pargmann (TI.com)" X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4118; i=msp@baylibre.com; h=from:subject:message-id; bh=A2mAWoAH+naUozBaIfs4pgf2PbMEbZdWu7l+93SxTY4=; b=owGbwMvMwCXWejAsc4KoVzDjabUkhsxYs93nf6Y+uKp7T/HFWnndZUdsvn+urNgYueV9i3Z9o tmFNVImHaUsDGJcDLJiiiydiaFp/+V3HktetGwzzBxWJpAhDFycAjCRnjSGfxY5wry7Wf97/xNQ 8Ly1935mZZBVWSvjt3n3ua5YNPpVdzH895rjXCDU61o/y6lw6pb169Y5zO+qdTl2lfWv57u90a4 NfAA= X-Developer-Key: i=msp@baylibre.com; a=openpgp; fpr=BADD88DB889FDC3E8A3D5FE612FA6A01E0A45B41 Remove Schmitt Trigger from mmc pins. With Schmitt Trigger enabled u-boot SPL is not able to read u-boot from mmc: Trying to boot from MMC2 Error reading cluster spl_load_image_fat: error reading image u-boot.img, err - -22 Error: -22 SPL: Unsupported Boot Device! SPL: failed to boot from all boot devices ### ERROR ### Please RESET the board ### I bisected this issue between u-boot v2025.10 and v2026.01 and found the devicetree merge to be the problem. At a closer look I found the k3-pinctrl.h changes. Disabling the Schmitt Trigger fixes the u-boot SPL failure to read from mmc. Fixes: 5b272127884b ("arm64: dts: ti: k3-pinctrl: Enable Schmitt Trigger by= default") Signed-off-by: Markus Schneider-Pargmann (TI.com) --- arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 36 ++++++++++++++++-------------= ---- 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/= ti/k3-am62a7-sk.dts index e99bdbc2e0cbdf858f1631096f9c2a086191bab3..9129045c8bbd3a83dba6ff6f214= 8a3624b91b546 100644 --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts @@ -315,30 +315,30 @@ AM62AX_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPM= C0_CSn3.I2C2_SDA */ =20 main_mmc0_pins_default: main-mmc0-default-pins { pinctrl-single,pins =3D < - AM62AX_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */ - AM62AX_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLKLB */ - AM62AX_IOPAD(0x21c, PIN_INPUT, 0) /* (AB1) MMC0_CLK */ - AM62AX_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */ - AM62AX_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (AA1) MMC0_DAT1 */ - AM62AX_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (AA3) MMC0_DAT2 */ - AM62AX_IOPAD(0x208, PIN_INPUT_PULLUP, 0) /* (Y4) MMC0_DAT3 */ - AM62AX_IOPAD(0x204, PIN_INPUT_PULLUP, 0) /* (AB2) MMC0_DAT4 */ - AM62AX_IOPAD(0x200, PIN_INPUT_PULLUP, 0) /* (AC1) MMC0_DAT5 */ - AM62AX_IOPAD(0x1fc, PIN_INPUT_PULLUP, 0) /* (AD2) MMC0_DAT6 */ - AM62AX_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (AC2) MMC0_DAT7 */ + AM62AX_IOPAD(0x220, PIN_INPUT_NOST, 0) /* (Y3) MMC0_CMD */ + AM62AX_IOPAD(0x218, PIN_INPUT_NOST, 0) /* (AB1) MMC0_CLKLB */ + AM62AX_IOPAD(0x21c, PIN_INPUT_NOST, 0) /* (AB1) MMC0_CLK */ + AM62AX_IOPAD(0x214, PIN_INPUT_NOST, 0) /* (AA2) MMC0_DAT0 */ + AM62AX_IOPAD(0x210, PIN_INPUT_PULLUP_NOST, 0) /* (AA1) MMC0_DAT1 */ + AM62AX_IOPAD(0x20c, PIN_INPUT_PULLUP_NOST, 0) /* (AA3) MMC0_DAT2 */ + AM62AX_IOPAD(0x208, PIN_INPUT_PULLUP_NOST, 0) /* (Y4) MMC0_DAT3 */ + AM62AX_IOPAD(0x204, PIN_INPUT_PULLUP_NOST, 0) /* (AB2) MMC0_DAT4 */ + AM62AX_IOPAD(0x200, PIN_INPUT_PULLUP_NOST, 0) /* (AC1) MMC0_DAT5 */ + AM62AX_IOPAD(0x1fc, PIN_INPUT_PULLUP_NOST, 0) /* (AD2) MMC0_DAT6 */ + AM62AX_IOPAD(0x1f8, PIN_INPUT_PULLUP_NOST, 0) /* (AC2) MMC0_DAT7 */ >; bootph-all; }; =20 main_mmc1_pins_default: main-mmc1-default-pins { pinctrl-single,pins =3D < - AM62AX_IOPAD(0x23c, PIN_INPUT, 0) /* (A21) MMC1_CMD */ - AM62AX_IOPAD(0x234, PIN_INPUT, 0) /* (B22) MMC1_CLK */ - AM62AX_IOPAD(0x230, PIN_INPUT, 0) /* (A22) MMC1_DAT0 */ - AM62AX_IOPAD(0x22c, PIN_INPUT, 0) /* (B21) MMC1_DAT1 */ - AM62AX_IOPAD(0x228, PIN_INPUT, 0) /* (C21) MMC1_DAT2 */ - AM62AX_IOPAD(0x224, PIN_INPUT, 0) /* (D22) MMC1_DAT3 */ - AM62AX_IOPAD(0x240, PIN_INPUT, 0) /* (D17) MMC1_SDCD */ + AM62AX_IOPAD(0x23c, PIN_INPUT_NOST, 0) /* (A21) MMC1_CMD */ + AM62AX_IOPAD(0x234, PIN_INPUT_NOST, 0) /* (B22) MMC1_CLK */ + AM62AX_IOPAD(0x230, PIN_INPUT_NOST, 0) /* (A22) MMC1_DAT0 */ + AM62AX_IOPAD(0x22c, PIN_INPUT_NOST, 0) /* (B21) MMC1_DAT1 */ + AM62AX_IOPAD(0x228, PIN_INPUT_NOST, 0) /* (C21) MMC1_DAT2 */ + AM62AX_IOPAD(0x224, PIN_INPUT_NOST, 0) /* (D22) MMC1_DAT3 */ + AM62AX_IOPAD(0x240, PIN_INPUT_NOST, 0) /* (D17) MMC1_SDCD */ >; bootph-all; }; --- base-commit: 6cd6c12031130a349a098dbeb19d8c3070d2dfbe change-id: 20260106-topic-am62a-mmc-pinctrl-v6-19-next-2f3e5563fbb5 Best regards, --=20 Markus Schneider-Pargmann (TI.com)