[PATCH 3/4] arm64: dts: ti: k3-am62l-evm: Disable MMC1 internal pulls on data pins
From: Judith Mendez
Date: Thu Feb 12 2026 - 13:43:05 EST
AM62L EVM has external pullups on MMC1 D1-D3 pins [0]. Remove internal
pullups considering:
- having both internal and external pullups reduces the total pull-up
resistance < 47K resulting in unnecessary power consumption
- mismatched pullup resistace between D0 and D1-D3 may cause potential
issues for modes with tighter timing requirements. The different pull-up
values cause different rise/fall times on each data line.
Fixes: 00fb4c73b67d ("arm64: dts: ti: k3-am62l: add initial reference board file")
[0] https://www.ti.com/lit/zip/SPRCAL6
Signed-off-by: Judith Mendez <jm@xxxxxx>
---
arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
index 5085cd255fcd5..98e58d3e7d752 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 @@ mmc1_pins_default: mmc1-default-pins {
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;
--
2.52.0