I am currently trying to setup my Jetson Nano Devkit, but I encounter some issues when I want to boot it on SD card (My issue is concerning devkit with eMMC and auxiliary SD card).
Initially I made some boot with SDK manager and flash.sh to be comfortable with it. Later on, I modified the device tree for 40 pin-header and it seems like everything worked but when I tried to modify sdhci@700d0400 in DT in order to enable SD card (mmcblk1p1) it result in the following error (dmesg):
Screen 1 – Error message (When booting from SD Card & When reading hotplugged SD from eMMC boot):
Before modifying the device tree nothing was recognized by Nano so I feel like my modification goes in the right direction. However, it seems like there is still something missing. My main objective is to boot from SD card but I think that the first step would be to read it from Nano.
I already tried two SD card but unfortunately, they have the same reference. I can assume that problem is not coming from them but maybe there is some compatibility issue as for some SD card and RPi? (I already ordered another reference to check it in few days)
Moreover, those SD card have been checked on both Linux host and Windows and they are both working well.
The “Jetson Nano devkit” is a specific term to indicate this is developer kit from NVIDIA. If this is the board made by you, then it is called a custom board.
So, is this a custom board made by you or it is really the nvidia devloper kit?
then actually I cannot help tell you what is needed to modify since I don’t know the hardware design from Waveshare.
But I can review if the method to “update” device tree is correct or not. For example, some users have correctly put the value in device tree, but they don’t know how to update it on device…
Anyway, if the problem never happens on any official developer kit before it must be linked to the hardware of this specific board.
Concerning device tree, if after flashing my OS I can find out my updated dtb file with the right configuration in filesystem : boot/dtb/kernel_tegra210-p3448-002-p3499-000-b00.dtb , modification must have been taken into account, no ?
Basically I initially downloaded Jetpack 4.6.2 from SDK Manager and then I changed dtb file (*) into dts format thanks to device tree compiler and then back it to dtb.
After I just use flash script with Nano in recovery mode : $ sudo ./flash.sh jetson-nano-emmc mmcblk0p1
Anyway, if the problem never happens on any official developer kit before it must be linked to the hardware of this specific board.
The error never happened on devkit. But the reason is NV devkit does not have a sdcard slot on the carrier board…
Basically I initially downloaded Jetpack 4.6.2 from SDK Manager and then I changed dtb file (*) into dts format thanks to device tree compiler and then back it to dtb.
The steps to update look correct. But the value you put to the device tree is not what I can guarantee.
In fact you are right, there are many misunderstandings, I am a total beginner on this subject.
It seems like error 110 is a timeout, even if SD slot is not placed on carrier board, it could also happen on Nano module SD slot if for example SD card was damaged no ? (On another storage reference like mmc0 i supposed ?)
There can be mistakes in values, I took it from the carrier board manufacturer wiki but to be honest I don’t understand everything that have been added on it. Is there anything that look very strange ?
*My writing is not that good in english, so I would like to apologize if something is not clear or make non-sense.
cd-inverted is for the polarity of the card detection gpio.
If you see sdcard error coming out when you have no sdcard inserted, it could mean card detection goes wrong.
For example, should be no card case, but the gpio tells the driver to start init the device…
But your case looks not likat that.
sdhci@700b0400 indicates the sdmmc3 pin on the jetson nano module. However, as I said before, the rest of connection requires the board vendor to provide.
