diff options
| author | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2022-03-24 16:56:48 +0100 |
|---|---|---|
| committer | Philippe Schenker <philippe.schenker@toradex.com> | 2022-07-28 15:07:27 +0200 |
| commit | 9c28adee7fd1abd5e5c30b4b93ce2e5c7ad18826 (patch) | |
| tree | 5f6abdd164ec5188ec2278bc98e9e468395a3d1f | |
| parent | 495decc430f7f53a07a6fac34c1ee7c14181a58c (diff) | |
arm64: dts: imx8mm-verdin: note about disabled sd1 pull-ups
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@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
(cherry picked from commit f84ccff6d8f34b7b1513411bcb172e8c903fc14e)
| -rw-r--r-- | arch/arm64/boot/dts/freescale/imx8mm-verdin.dtsi | 4 |
1 files changed, 4 insertions, 0 deletions
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 @@ <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>, |