[PATCH 2/2] arm64: dts: ti: k3-am64: Set MMC1_CLK pin as OUTPUT
From: Sai Sree Kartheek Adivi
Date: Sun Sep 27 2026 - 23:31:33 EST
From: Judith Mendez <jm@xxxxxx>
MMC clock pins must be configured as OUTPUT-only per TRM specification [0]
with receiver disabled (RXACTIVE bit = 0). Change MMC1_CLK from PIN_INPUT
to PIN_OUTPUT in AM64 device trees to match documentation.
[0] https://www.ti.com/lit/pdf/spruim2 Rev. J: Table 12-327. MMCSDi I/O Signals
Signed-off-by: Judith Mendez <jm@xxxxxx>
Signed-off-by: Sai Sree Kartheek Adivi <s-adivi@xxxxxx>
---
arch/arm64/boot/dts/ti/k3-am642-evm.dts | 2 +-
arch/arm64/boot/dts/ti/k3-am642-sk.dts | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index a8c256269859e..677b7ec7c7dae 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -253,7 +253,7 @@ &main_pmx0 {
main_mmc1_pins_default: main-mmc1-default-pins {
pinctrl-single,pins = <
AM64X_IOPAD(0x0294, PIN_INPUT_PULLUP, 0) /* (J19) MMC1_CMD */
- AM64X_IOPAD(0x028c, PIN_INPUT_PULLDOWN, 0) /* (L20) MMC1_CLK */
+ AM64X_IOPAD(0x028c, PIN_OUTPUT, 0) /* (L20) MMC1_CLK */
AM64X_IOPAD(0x0288, PIN_INPUT_PULLUP, 0) /* (K21) MMC1_DAT0 */
AM64X_IOPAD(0x0284, PIN_INPUT_PULLUP, 0) /* (L21) MMC1_DAT1 */
AM64X_IOPAD(0x0280, PIN_INPUT_PULLUP, 0) /* (K19) MMC1_DAT2 */
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 6b50997780448..ea85be05a4111 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -201,7 +201,7 @@ main_mmc1_pins_default: main-mmc1-default-pins {
AM64X_IOPAD(0x029c, PIN_INPUT_PULLUP, 0) /* (C20) MMC1_SDWP */
AM64X_IOPAD(0x0298, PIN_INPUT_PULLUP, 0) /* (D19) MMC1_SDCD */
AM64X_IOPAD(0x0294, PIN_INPUT_PULLUP, 0) /* (J19) MMC1_CMD */
- AM64X_IOPAD(0x028c, PIN_INPUT_PULLDOWN, 0) /* (L20) MMC1_CLK */
+ AM64X_IOPAD(0x028c, PIN_OUTPUT, 0) /* (L20) MMC1_CLK */
AM64X_IOPAD(0x0288, PIN_INPUT_PULLUP, 0) /* (K21) MMC1_DAT0 */
AM64X_IOPAD(0x0284, PIN_INPUT_PULLUP, 0) /* (L21) MMC1_DAT1 */
AM64X_IOPAD(0x0280, PIN_INPUT_PULLUP, 0) /* (K19) MMC1_DAT2 */
--
2.54.0