[PATCH v3 0/4] MMC pinmux configuration fixes

[PATCH v3 0/4] MMC pinmux configuration fixes

[Judith Mendez]

This series fixes MMC pin input/output and pullup/pulldown settings
across AM62x, AM62Ax, and AM62Lx boards.

All patches have been tested on their appropriate SK & EVM boards.
BeaglePlay and Pocketbeagle boards have also been tested.

Changes since v3:
- Include Moteen's review tags
- Add changelogs & links
- Switch out io expander patch for the correct AM62Lx patch 4/4
- Fixup cover letter description

Link to v1:
https://lore.kernel.org/linux-devicetree/20260729195958.671147-1-jm@ti.com/
Link to v2:
https://lore.kernel.org/linux-devicetree/20260805004821.416613-1-jm@ti.com/

According to review on v2 of the patch series, I included
Fixes tags for all patches. For patch 3/4, blaming
the original commits that introduced the "bug" will cause bad
backport conflicts so I tried to blame superficially and only
fix the files as they are currently structed, LMK if this is not
good enough.

Judith Mendez (4):
  arm64: dts: ti: k3-am62a: Fix MMC0_CLK register address
  arm64: dts: ti: k3-am62a: Set MMC clock pins as OUTPUT
  arm64: dts: ti: k3-am62: Set MMC clock pins as OUTPUT
  arm64: dts: ti: k3-am62l-evm: Remove unnecessary internal pullups for
    MMC0

 arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts         | 2 +-
 arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts | 2 +-
 arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts   | 6 +++---
 arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi   | 2 +-
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts          | 5 ++---
 arch/arm64/boot/dts/ti/k3-am62l3-evm.dts         | 4 ++--
 arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi   | 2 +-
 7 files changed, 11 insertions(+), 12 deletions(-)

-- 
2.54.0

[PATCH v3 1/4] arm64: dts: ti: k3-am62a: Fix MMC0_CLK register address

[Judith Mendez]

MMC0_CLKLB and MMC0_CLK have incorrectly swapped register addresses
as per datasheet [0]. Set the correct MMC0_CLK address and drop the
unneeded MMC0_CLKLB pin configuration.

[0] https://www.ti.com/lit/gpn/am62a7 Rev. E: Table 5-1. Pin Attributes

Fixes: e041ec6e86e7 ("arm64: dts: ti: k3-am62a7-sk: Enable eMMC support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Moteen Shah <m-shah@ti.com>
---
Changes since v2:
- Add Moteen's review tag
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index d3b3675e7a8fc..b04636cab71c7 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -328,8 +328,7 @@ AM62AX_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPMC0_CSn3.I2C2_SDA */
 	main_mmc0_pins_default: main-mmc0-default-pins {
 		pinctrl-single,pins = <
 			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(0x218, 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 */
-- 
2.54.0

[PATCH v3 2/4] arm64: dts: ti: k3-am62a: Set MMC clock pins as OUTPUT

[Judith Mendez]

MMC clock pins must be configured as OUTPUT-only per TRM [0] with
receiver disabled (RXACTIVE bit = 0). Change MMC CLK pins from
PIN_INPUT to PIN_OUTPUT to match documentation.

[0] https://www.ti.com/lit/pdf/spruj16 Rev. C: Table 12-257. MMCSDi I/O Signals

Fixes: e041ec6e86e7 ("arm64: dts: ti: k3-am62a7-sk: Enable eMMC support")
Fixes: 38c4a08c820c ("arm64: dts: ti: Add support for AM62A7-SK")
Cc: <stable@vger.kernel.org>
Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Moteen Shah <m-shah@ti.com>
---
Changes since v2:
- Add Moteen's review tag
---
 arch/arm64/boot/dts/ti/k3-am62a7-sk.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
index b04636cab71c7..e63c5200a2370 100644
--- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
@@ -328,7 +328,7 @@ AM62AX_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPMC0_CSn3.I2C2_SDA */
 	main_mmc0_pins_default: main-mmc0-default-pins {
 		pinctrl-single,pins = <
 			AM62AX_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
-			AM62AX_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
+			AM62AX_IOPAD(0x218, PIN_OUTPUT, 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 */
@@ -344,7 +344,7 @@ AM62AX_IOPAD(0x1f8, PIN_INPUT_PULLUP, 0) /* (AC2) MMC0_DAT7 */
 	main_mmc1_pins_default: main-mmc1-default-pins {
 		pinctrl-single,pins = <
 			AM62AX_IOPAD(0x23c, PIN_INPUT, 0) /* (A21) MMC1_CMD */
-			AM62AX_IOPAD(0x234, PIN_INPUT, 0) /* (B22) MMC1_CLK */
+			AM62AX_IOPAD(0x234, PIN_OUTPUT, 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 */
-- 
2.54.0

[PATCH v3 3/4] arm64: dts: ti: k3-am62: Set MMC clock pins as OUTPUT

[Judith Mendez]

MMC clock pins must be configured as OUTPUT-only per TRM [0] with
receiver disabled (RXACTIVE bit = 0). Change MMC CLK pins from
PIN_INPUT to PIN_OUTPUT to match documentation.

[0] https://www.ti.com/lit/pdf/spruiv7 Rev. C: Table 12-246. MMCSDi I/O Signals

Fixes: a0b8da04153e ("arm64: dts: ti: k3-am62*: Move eMMC pinmux to top level board file")
Fixes: 92d8c028aa92 ("arm64: dts: ti: Add k3-am62-pocketbeagle2")
Fixes: f5a731f0787f ("arm64: dts: ti: Add k3-am625-beagleplay")
Fixes: 2517e476b819 ("arm64: dts: ti: Add support for AM6254atl SiP SK")
Fixes: a841581451af ("arm64: dts: ti: Refractor AM625 SK dts")
Cc: <stable@vger.kernel.org>
Signed-off-by: Judith Mendez <jm@ti.com>
Reviewed-by: Moteen Shah <m-shah@ti.com>
---
Changes since v2:
- Add Moteen's Review tag
---
 arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts         | 2 +-
 arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts | 2 +-
 arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts   | 6 +++---
 arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi   | 2 +-
 arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi   | 2 +-
 5 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
index dfd65c00f5b95..7fd508f4eddf1 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
@@ -86,7 +86,7 @@ main_mmc0_pins_default: main-mmc0-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (V3) MMC0_CMD */
-			AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (Y1) MMC0_CLK */
+			AM62X_IOPAD(0x218, PIN_OUTPUT, 0) /* (Y1) MMC0_CLK */
 			AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (V2) MMC0_DAT0 */
 			AM62X_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (V1) MMC0_DAT1 */
 			AM62X_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (W2) MMC0_DAT2 */
diff --git a/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts b/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
index 7a4cffc27bda3..1c691629d4ad0 100644
--- a/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62-pocketbeagle2.dts
@@ -235,7 +235,7 @@ AM62X_IOPAD(0x0020, PIN_OUTPUT, 3) /* (J25) OSPI0_D5.UART6_TXD */
 	main_mmc1_pins_default: main-mmc1-default-pins {
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x23c, PIN_INPUT, 0) /* (A21/C18) MMC1_CMD */
-			AM62X_IOPAD(0x234, PIN_INPUT, 0) /* (B22/A20) MMC1_CLK */
+			AM62X_IOPAD(0x234, PIN_OUTPUT, 0) /* (B22/A20) MMC1_CLK */
 			AM62X_IOPAD(0x230, PIN_INPUT, 0) /* (A22/A19) MMC1_DAT0 */
 			AM62X_IOPAD(0x22c, PIN_INPUT, 0) /* (B21/B19) MMC1_DAT1 */
 			AM62X_IOPAD(0x228, PIN_INPUT, 0) /* (C21/B20) MMC1_DAT2 */
diff --git a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
index c468b9c5fc09a..898e4ca3fd87e 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
+++ b/arch/arm64/boot/dts/ti/k3-am625-beagleplay.dts
@@ -323,7 +323,7 @@ emmc_pins_default: emmc-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x0220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
-			AM62X_IOPAD(0x0218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
+			AM62X_IOPAD(0x0218, PIN_OUTPUT, 0) /* (AB1) MMC0_CLK */
 			AM62X_IOPAD(0x0214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
 			AM62X_IOPAD(0x0210, PIN_INPUT, 0) /* (AA1) MMC0_DAT1 */
 			AM62X_IOPAD(0x020c, PIN_INPUT, 0) /* (AA3) MMC0_DAT2 */
@@ -346,7 +346,7 @@ sd_pins_default: sd-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x023c, PIN_INPUT, 0) /* (A21) MMC1_CMD */
-			AM62X_IOPAD(0x0234, PIN_INPUT, 0) /* (B22) MMC1_CLK */
+			AM62X_IOPAD(0x0234, PIN_OUTPUT, 0) /* (B22) MMC1_CLK */
 			AM62X_IOPAD(0x0230, PIN_INPUT, 0) /* (A22) MMC1_DAT0 */
 			AM62X_IOPAD(0x022c, PIN_INPUT, 0) /* (B21) MMC1_DAT1 */
 			AM62X_IOPAD(0x0228, PIN_INPUT, 0) /* (C21) MMC1_DAT2 */
@@ -358,7 +358,7 @@ AM62X_IOPAD(0x0240, PIN_INPUT, 7) /* (D17) MMC1_SDCD.GPIO1_48 */
 	wifi_pins_default: wifi-default-pins {
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x0120, PIN_INPUT, 0) /* (C24) MMC2_CMD */
-			AM62X_IOPAD(0x0118, PIN_INPUT, 0) /* (D25) MMC2_CLK */
+			AM62X_IOPAD(0x0118, PIN_OUTPUT, 0) /* (D25) MMC2_CLK */
 			AM62X_IOPAD(0x0114, PIN_INPUT, 0) /* (B24) MMC2_DAT0 */
 			AM62X_IOPAD(0x0110, PIN_INPUT, 0) /* (C25) MMC2_DAT1 */
 			AM62X_IOPAD(0x010c, PIN_INPUT, 0) /* (E23) MMC2_DAT2 */
diff --git a/arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi
index 9c83626826453..085b067d96fbb 100644
--- a/arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am625-sk-common.dtsi
@@ -98,7 +98,7 @@ main_mmc0_pins_default: main-mmc0-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
-			AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
+			AM62X_IOPAD(0x218, PIN_OUTPUT, 0) /* (AB1) MMC0_CLK */
 			AM62X_IOPAD(0x214, PIN_INPUT, 0) /* (AA2) MMC0_DAT0 */
 			AM62X_IOPAD(0x210, PIN_INPUT_PULLUP, 0) /* (AA1) MMC0_DAT1 */
 			AM62X_IOPAD(0x20c, PIN_INPUT_PULLUP, 0) /* (AA3) MMC0_DAT2 */
diff --git a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
index ab9e58c2d225e..d2f41e2ed6239 100644
--- a/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am62x-sk-common.dtsi
@@ -194,7 +194,7 @@ main_mmc1_pins_default: main-mmc1-default-pins {
 		bootph-all;
 		pinctrl-single,pins = <
 			AM62X_IOPAD(0x23c, PIN_INPUT, 0) /* (A21/C18) MMC1_CMD */
-			AM62X_IOPAD(0x234, PIN_INPUT, 0) /* (B22/A20) MMC1_CLK */
+			AM62X_IOPAD(0x234, PIN_OUTPUT, 0) /* (B22/A20) MMC1_CLK */
 			AM62X_IOPAD(0x230, PIN_INPUT, 0) /* (A22/A19) MMC1_DAT0 */
 			AM62X_IOPAD(0x22c, PIN_INPUT, 0) /* (B21/B19) MMC1_DAT1 */
 			AM62X_IOPAD(0x228, PIN_INPUT, 0) /* (C21/B20) MMC1_DAT2 */
-- 
2.54.0

[PATCH v3 4/4] arm64: dts: ti: k3-am62l-evm: Remove unnecessary internal pullups for MMC0

[Judith Mendez]

AM62L EVM has external pullups on MMC0 CMD and D0 pins [0]. Remove
internal pullups considering:
- Internal pullups are not required, without internal pullups, RDAT and
  RCMD values of 47K are within spec
- having both pullups (stronger pull) results in unnecessary power
  consumption

[0] https://www.ti.com/lit/zip/SPRCAL6

Fixes: 00fb4c73b67d ("arm64: dts: ti: k3-am62l: add initial reference board file")
Cc: <stable@vger.kernel.org>
Signed-off-by: Judith Mendez <jm@ti.com>
---
Changes since v2:
- Add patch
---
 arch/arm64/boot/dts/ti/k3-am62l3-evm.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
index 84a0cfaaf196a..964387eb51788 100644
--- a/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am62l3-evm.dts
@@ -253,9 +253,9 @@ AM62LX_IOPAD(0x01e0, PIN_INPUT_PULLUP, 0) /* (D8) I2C2_SDA */
 
 	mmc0_pins_default: mmc0-default-pins {
 		pinctrl-single,pins = <
-			AM62LX_IOPAD(0x0214, PIN_INPUT_PULLUP, 0) /* (D2) MMC0_CMD */
+			AM62LX_IOPAD(0x0214, PIN_INPUT, 0) /* (D2) MMC0_CMD */
 			AM62LX_IOPAD(0x020c, PIN_OUTPUT, 0) /* (B2) MMC0_CLK */
-			AM62LX_IOPAD(0x0208, PIN_INPUT_PULLUP, 0) /* (D3) MMC0_DAT0 */
+			AM62LX_IOPAD(0x0208, PIN_INPUT, 0) /* (D3) MMC0_DAT0 */
 			AM62LX_IOPAD(0x0204, PIN_INPUT_PULLUP, 0) /* (D4) MMC0_DAT1 */
 			AM62LX_IOPAD(0x0200, PIN_INPUT_PULLUP, 0) /* (C1) MMC0_DAT2 */
 			AM62LX_IOPAD(0x01fc, PIN_INPUT_PULLUP, 0) /* (C2) MMC0_DAT3 */
-- 
2.54.0

Re: [PATCH v3 3/4] arm64: dts: ti: k3-am62: Set MMC clock pins as OUTPUT

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:

Pre-existing issues:
- [Medium] The patch incompletely applies a required hardware fix for AM62x SoCs. While it updates MMC clock pins to PIN_OUTPUT to comply with the AM62x TRM (RXACTIVE = 0) on TI evaluation boards and Beagle boards, it misses several third-party AM62x device trees (e.g., Toradex Verdin, PHYTEC phyCORE/phyBOARD, and TQ-Systems). This leaves these boards in violation of the SoC hardware specification, which requires the receiver to be disabled.
--

--- Patch [3]: [PATCH v3 3/4] arm64: dts: ti: k3-am62: Set MMC clock pins as OUTPUT ---
commit 139fe185686919a76207d40e04e2f122da9dca42
Author: Judith Mendez <jm@ti.com>

arm64: dts: ti: k3-am62: Set MMC clock pins as OUTPUT

This commit updates the device trees for TI evaluation and Beagle boards
to configure MMC clock pins as OUTPUT-only. This complies with the AM62x
TRM requirement to keep the receiver disabled (RXACTIVE = 0).

> diff --git a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> index dfd65c00f5b95..7fd508f4eddf1 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62-lp-sk.dts
> @@ -86,7 +86,7 @@ main_mmc0_pins_default: main-mmc0-default-pins {
>  		bootph-all;
>  		pinctrl-single,pins = <
>  			AM62X_IOPAD(0x220, PIN_INPUT, 0) /* (V3) MMC0_CMD */
> -			AM62X_IOPAD(0x218, PIN_INPUT, 0) /* (Y1) MMC0_CLK */
> +			AM62X_IOPAD(0x218, PIN_OUTPUT, 0) /* (Y1) MMC0_CLK */

[Severity: Medium]
This is a pre-existing issue, but this patch seems to miss several third-party
AM62x boards that also leave the MMC clock pins incorrectly configured as
PIN_INPUT.

Should these device trees also be updated to comply with the hardware
specification and prevent potential signal integrity issues?

For example, the Toradex Verdin leaves MMC0_CLK configured with PIN_INPUT:

arch/arm64/boot/dts/ti/k3-am62-verdin.dtsi:pinctrl_sdhci0() {
    ...
    AM62X_IOPAD(0x218, PIN_INPUT,        0) /* (AB1) MMC0_CLK  */
    ...
}

The PHYTEC phyCORE and phyBOARD-Lyra boards use PIN_INPUT_PULLDOWN:

arch/arm64/boot/dts/ti/k3-am62-phycore-som.dtsi:main_mmc0_pins_default() {
    ...
    AM62X_IOPAD(0x218, PIN_INPUT_PULLDOWN, 0) /* (AB1) MMC0_CLK */
    ...
}

arch/arm64/boot/dts/ti/k3-am62x-phyboard-lyra.dtsi:main_mmc1_pins_default() {
    ...
    AM62X_IOPAD(0x234, PIN_INPUT_PULLDOWN, 0) /* (B22) MMC1_CLK */
    ...
}

The TQ-Systems boards also leave them configured with PIN_INPUT:

arch/arm64/boot/dts/ti/k3-am625-tqma62xx.dtsi:main_mmc0_pins() {
    ...
    AM62X_IOPAD(0x218, PIN_INPUT, 0)
    ...
}

arch/arm64/boot/dts/ti/k3-am625-tqma62xx-mba62xx.dts:main_mmc1_pins() {
    ...
    AM62X_IOPAD(0x234, PIN_INPUT, 0)
    ...
}

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260805225438.464184-1-jm@ti.com?part=3

Re: [PATCH v3 2/4] arm64: dts: ti: k3-am62a: Set MMC clock pins as OUTPUT

[sashiko-bot]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:

Pre-existing issues:
- [High] Incomplete fix for AM62A TRM MMC clock pin configuration, missing the phyCORE-AM62A SOM.
--

--- Patch [2]: [PATCH v3 2/4] arm64: dts: ti: k3-am62a: Set MMC clock pins as OUTPUT ---
commit b38183ead6a0951c2fe280be51beca049f7e3062
Author: Judith Mendez <jm@ti.com>

arm64: dts: ti: k3-am62a: Set MMC clock pins as OUTPUT

This commit updates the device tree for the AM62A7-SK board to configure the
MMC clock pins as output-only. This matches the TRM requirement to disable
the receiver.

> diff --git a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> index 826fff38cfb77..9b120cd9b0c37 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> +++ b/arch/arm64/boot/dts/ti/k3-am62a7-sk.dts
> @@ -324,7 +324,7 @@ AM62AX_IOPAD(0x0b4, PIN_INPUT_PULLUP, 1) /* (K24) GPMC0_CSn3.I2C2_SDA */
>  	main_mmc0_pins_default: main-mmc0-default-pins {
>  		pinctrl-single,pins = <
>  			AM62AX_IOPAD(0x220, PIN_INPUT, 0) /* (Y3) MMC0_CMD */
> -			AM62AX_IOPAD(0x218, PIN_INPUT, 0) /* (AB1) MMC0_CLK */
> +			AM62AX_IOPAD(0x218, PIN_OUTPUT, 0) /* (AB1) MMC0_CLK */

[Severity: High]
This is a pre-existing issue, but since you are fixing the TRM MMC clock pin
configuration for the AM62A, should we also fix the same violation on the
phyCORE-AM62A SOM?

In arch/arm64/boot/dts/ti/k3-am62a-phycore-som.dtsi in main_mmc0_pins_default:

        main_mmc0_pins_default: main-mmc0-default-pins {
                pinctrl-single,pins = <
                        AM62AX_IOPAD(0x220, PIN_INPUT_PULLUP, 0) /* (Y6) MMC0_CMD */
                        AM62AX_IOPAD(0x218, PIN_INPUT_PULLDOWN, 0) /* (AB7) MMC0_CLK */

The MMC0_CLK pin there retains the receiver-enabled PIN_INPUT_PULLDOWN setting
instead of being updated to PIN_OUTPUT as required by the TRM. Can this cause
signal integrity issues or MMC bus errors on that board?

[ ... ]

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260805225438.464184-1-jm@ti.com?part=2