On 4/1/24 17:28, Aurelien Jarno wrote:
On 2024-03-28 17:01, Heinrich Schuchardt wrote:
On 24.03.24 16:00, Aurelien Jarno wrote:
On 2024-03-21 19:11, Heinrich Schuchardt wrote:
The differences between the Milk-V Mars board and the VisionFive 2 board
are small enough that we can support both using the same U-Boot build.
* The model and compatible property are taken from proposed Linux patches.
* The EEPROM is atmel,24c02 according to the vendor U-Boot.
* The second Ethernet port is not available.
From the device tree that have been submitted to the kernel [1] it seems
another difference is that there is a CD gpio for mmc1.
Thank you for reviewing.
On all of Milk-V Mars, VisionFive 2 1.2B, and 1.3A I see GPIO 41 level
changing when removing or inserting an SD card using U-Boot command 'gpio
status -a'. So this seems not to be Milk-V specific.
Could you, please, check.
This already have been answered by others, thanks.
From the schematics, it also seems that the usb0 port is not in
peripheral mode, but in host mode. That said on the submitted kernel
device tree it seems simply disabled.
All three blue-colored USB 3.0 ports are able to read an SD-card in U-Boot.
The black port provides 5V but I could not make it work.
On the schema I found:
USB20: Do not support OTG mode and AVSS_USB0-AVSS_USB2 attached to ground.
Could you, please, specify which node in the device-tree you want to
disable. I cannot see anything disabled for usb@10100000 and usb@0 in the
kernel device-tree.
Disclaimer, I have no such board, but I remember people on IRC trying to
use the device tree from the VF2 on a Milk-V Mars and getting an error
with the USB being in a wrong mode.
The difference I have noticed is not a node but the dr_mode property:
&usb0 {
dr_mode = "peripheral";
status = "okay";
};
Thanks Aurelien for the explanation.
The node usb@10100000 (aka usb0) does not exist in the U-Boot
VisionFive2 device-tree, yet. There isn't any dr_mode property either.
We will have to consider this node once we merge the Linux device-tree.
Best regards
Heinrich
This does not appear on the patches submitted on the Linux side for the MilkV
Mars.
Aurelien
