From: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx> Add a note about us using discrete external on-module resistors pulling-up to the on-module +V3.3_1.8_SD (LDO5) rail and explicitly disabling the internal pull-ups due to ERR050080 [1]: IO: Degradation of internal IO pullup/pulldown current capability for IO’s continuously driven in a 3.3V operating mode [1] https://www.nxp.com/webapp/Download?colCode=IMX8MM_0N87W Signed-off-by: Marcel Ziswiler <marcel.ziswiler@xxxxxxxxxxx> --- arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi index 6e1c762fd2e7..97dd7a00d63b 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi @@ -1179,6 +1179,10 @@ pinctrl_usdhc2_pwr_en: usdhc2pwrengrp { <MX8MM_IOMUXC_NAND_CLE_GPIO3_IO5 0x6>; /* SODIMM 76 */ }; + /* + * Note: Due to ERR050080 we use discrete external on-module resistors pulling-up to the + * on-module +V3.3_1.8_SD (LDO5) rail and explicitly disable the internal pull-ups here. + */ pinctrl_usdhc2: usdhc2grp { fsl,pins = <MX8MM_IOMUXC_GPIO1_IO04_USDHC2_VSELECT 0x10>, -- 2.34.1
