Hey NVIDIA Admin, I have custom board that routes the SDMMC pin from jetson nano to an sd card. After reading some NVIDIA documentation, I saw the SDMMC is connected to SDMMC3 and in the kernel sdhci@700400. I saw from the dts converted from my kernel dtb shows that the sdhci shows status=“disabl…

Hi, since I actually use Jetson Nano development kit module for my custom board. How to solve this problem? This is not a legal case. I replied similar case on NX for another user too. [image] Boot Jetson Xavier from microsd when both mmc and microsd includes JetPack images? J…

Hello, Please refer to this post. [image] Jetson nano SD card can use,but kernel prompt error Jetson Nano Hello, The basic device tree change for enabling sdmmc3 https://forums.developer.nvidia.com/t/microsd-card-not-detected-on-jetson-nano-production-module/80776/14 …

Hey @WayneWWW , I already follow the guidelines to change the dtsi, compile it and flash it to my jetson nano. Note my case maybe a little bit different since I actually use Jetson Nano development kit module for my custom board. The SD card that contains my image is in the sdmmc1 the original sd …

Hey @WayneWWW , Ok got it , did not know about it. I have the production module as well, let me try the modified dtb in the production module and get back to you. Previously I thought I will do the development on the devkit first since using sd card has more storage (more than 16GB). Best Regard…

Hi @WayneWWW , I am trying to add the SD card at sdmmc3 in jetson nano production module now. I followed the post you shown before, applying the patch 975882.diff and take the dts from the forum. Using 2 of the mentioned solution I managed to have the sd card working with ultra high-speed and ever…

You need to check the second patch from this link. [image] Jetson nano SD card can use,but kernel prompt error Jetson Nano Hello, The basic device tree change for enabling sdmmc3 https://forums.developer.nvidia.com/t/microsd-card-not-detected-on-jetson-nano-production…

Hi @WayneWWW , I have checked that one, but that one is in common.dtsi I am not sure how it can relate to dts files. In the dts I saw similar one which is : max-clk-limit = <0x61a80>; should I just remove this? But this one also exists in my old dts files and it works fine.

What is your result of below node now? $cat /sys/kernel/debug/mmc1/clock

clock: 50000000 Hz vdd: 21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select: 0 (don’t care) power mode: 2 (on) bus width: 2 (4 bits) timing spec: 2 (sd high-speed) signal voltage: 0 (3.30 V) driver type: 0 (driver type B)

oh sorry that one is the ios, the clock will be : 50000000

Yes, then please remove that line first. Actually, you can just compare what sdhci@700b0400 was like between your original and that one from IMX477 dts.

Kernel Modification for adding extra SD card at SDMMC3

Robotics & Edge Computing Jetson Systems Jetson Nano

WayneWWW January 5, 2021, 8:35am 2

Hello,

Please refer to this post.

And cannot boot up probably means kernel crashed during boot up. Sharing the dmesg may provide more info.

Topic		Replies	Views
Micro-SD card on custom jetson nano Jetson Nano boot , board-design	73	10237	August 9, 2021
Slow SD Card Jetson Nano kernel , gpio , board-design	82	5906	June 16, 2021
I'm trying to use MicroSD on a custom carrier board Jetson Nano board-design	140	9021	August 13, 2021
MicroSD card not detected on Jetson Nano production module Jetson Nano	19	17691	July 26, 2021
I/O Error on SD Card over SDMMC3 Jetson Nano pinmux	4	1998	September 17, 2021
Kernel error occurs when inserting SD card Jetson Nano kernel	15	2776	September 3, 2021
Jetson Nano Enable SDMMC3 for SD card Jetson Nano	7	5415	July 30, 2021
Can't detect SD card Jetson Nano	22	4557	February 6, 2020
SD-MMC (mmc1) on production module Jetson Nano board-design	22	4489	June 21, 2021
Error -84 whilst initialising SD CARD in Jetson Nano EMMC custom board Jetson Nano hw , kernel	26	3983	June 2, 2022

Kernel Modification for adding extra SD card at SDMMC3

Related topics