From f84ccff6d8f34b7b1513411bcb172e8c903fc14e Mon Sep 17 00:00:00 2001 From: Marcel Ziswiler Date: Thu, 24 Mar 2022 16:56:48 +0100 Subject: [PATCH] arm64: dts: imx8mm-verdin: note about disabled sd1 pull-ups MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Shawn Guo --- 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 6e1c762fd2e76..97dd7a00d63b0 100644 --- a/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi +++ b/arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi @@ -1179,6 +1179,10 @@ ; /* 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 = , -- 2.30.2