From: Judith Mendez Date: Mon, 23 Feb 2026 23:37:30 +0000 (-0600) Subject: arm64: dts: ti: k3-am62l3-evm: Disable MMC1 internal pulls on data pins X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=02532ba56362907b6aca3e8289c4a9247ef83325;p=thirdparty%2Flinux.git arm64: dts: ti: k3-am62l3-evm: Disable MMC1 internal pulls on data pins AM62L EVM has external 47K pullups on MMC1 DAT1-DAT3 pins [0]. Disable internal pullups on DAT1-DAT3 so that each line has a single pullup source: - with both pullups enabled, the effective parallel resistance on DAT1-3 (~24.2K) creates a ~2x mismatch vs DAT0 (47K external only). Removing internal pullups results in DAT1-3 matching DAT0 at 47K - 47K external alone is within the recommended range for 1.8V signaling (10K min, 50K recommended max) - both internal and external pullups enabled equals unnecessary power consumption [0] https://www.ti.com/lit/zip/SPRCAL6 Fixes: 00fb4c73b67d ("arm64: dts: ti: k3-am62l: add initial reference board file") Signed-off-by: Judith Mendez Reviewed-by: Moteen Shah Link: https://patch.msgid.link/20260223233731.2690472-3-jm@ti.com Signed-off-by: Vignesh Raghavendra --- diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts index 9d0506d85bae5..a1af4571a815d 100644 --- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts +++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts @@ -272,9 +272,9 @@ AM62LX_IOPAD(0x0230, PIN_INPUT, 0) /* (Y3) MMC1_CMD */ AM62LX_IOPAD(0x0228, PIN_OUTPUT, 0) /* (Y2) MMC1_CLK */ AM62LX_IOPAD(0x0224, PIN_INPUT, 0) /* (AA1) MMC1_DAT0 */ - AM62LX_IOPAD(0x0220, PIN_INPUT_PULLUP, 0) /* (Y4) MMC1_DAT1 */ - AM62LX_IOPAD(0x021c, PIN_INPUT_PULLUP, 0) /* (AA2) MMC1_DAT2 */ - AM62LX_IOPAD(0x0218, PIN_INPUT_PULLUP, 0) /* (AB2) MMC1_DAT3 */ + AM62LX_IOPAD(0x0220, PIN_INPUT, 0) /* (Y4) MMC1_DAT1 */ + AM62LX_IOPAD(0x021c, PIN_INPUT, 0) /* (AA2) MMC1_DAT2 */ + AM62LX_IOPAD(0x0218, PIN_INPUT, 0) /* (AB2) MMC1_DAT3 */ AM62LX_IOPAD(0x0234, PIN_INPUT, 0) /* (B6) MMC1_SDCD */ >; bootph-all;