RE: [PATCH 1/2] arm64: dt: imx93-tqma9352-mba93xxca: enable Open Drain for MDIO

[Peng Fan]

> Subject: [PATCH 1/2] arm64: dt: imx93-tqma9352-mba93xxca: enable
> Open Drain for MDIO
> 
> From: Markus Niebel <Markus.Niebel@xxxxxxxxxxxxxxx>
> 
> Follow suggestion from hardware team.

This is a bit vague, my guess:

The board has a pull-up resistor for MDIO pin per PHY design guide.
When MDIO is idle, it needs to be high and open drain is better
to be used here for power saving.

Regards,
Peng.
> 
> Signed-off-by: Markus Niebel <Markus.Niebel@xxxxxxxxxxxxxxx>
> Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
>  .../arm64/boot/dts/freescale/imx93-tqma9352-mba93xxca.dts | 8
> ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/freescale/imx93-tqma9352-
> mba93xxca.dts b/arch/arm64/boot/dts/freescale/imx93-tqma9352-
> mba93xxca.dts
> index 599df32976e24..8e939d716aac8 100644
> --- a/arch/arm64/boot/dts/freescale/imx93-tqma9352-mba93xxca.dts
> +++ b/arch/arm64/boot/dts/freescale/imx93-tqma9352-
> mba93xxca.dts
> @@ -627,8 +627,8 @@ pinctrl_eqos: eqosgrp {
>  		fsl,pins = <
>  			/* PD | FSEL_2 | DSE X4 */
>  			MX93_PAD_ENET1_MDC__ENET_QOS_MDC
> 			0x51e
> -			/* SION | HYS | FSEL_2 | DSE X4 */
> -
> 	MX93_PAD_ENET1_MDIO__ENET_QOS_MDIO
> 	0x4000111e
> +			/* SION | HYS | ODE | FSEL_2 | DSE X4 */
> +
> 	MX93_PAD_ENET1_MDIO__ENET_QOS_MDIO
> 	0x4000191e
>  			/* HYS | FSEL_0 | DSE no drive */
> 
> 	MX93_PAD_ENET1_RD0__ENET_QOS_RGMII_RD0
> 	0x1000
> 
> 	MX93_PAD_ENET1_RD1__ENET_QOS_RGMII_RD1
> 	0x1000
> @@ -659,8 +659,8 @@ pinctrl_fec: fecgrp {
>  		fsl,pins = <
>  			/* PD | FSEL_2 | DSE X4 */
>  			MX93_PAD_ENET2_MDC__ENET1_MDC
> 		0x51e
> -			/* SION | HYS | FSEL_2 | DSE X4 */
> -			MX93_PAD_ENET2_MDIO__ENET1_MDIO
> 		0x4000111e
> +			/* SION | HYS | ODE | FSEL_2 | DSE X4 */
> +			MX93_PAD_ENET2_MDIO__ENET1_MDIO
> 		0x4000191e
>  			/* HYS | FSEL_0 | DSE no drive */
>  			MX93_PAD_ENET2_RD0__ENET1_RGMII_RD0
> 		0x1000
>  			MX93_PAD_ENET2_RD1__ENET1_RGMII_RD1
> 		0x1000
> --
> 2.34.1
>