Hi Alexander,
device_type = "memory";
reg = <0x0 0x40000000>;
};
chosen {
- stdout-path = "serial0:115200n8";
Nack. By default graphical output is quite unusable on this board, so we
want to output to serial.
If your Linux submitted device tree doesn't contain this part, please
fix it there.
+ bootargs = "console=ttyPS0,115200 earlyprintk root=/dev/mmcblk0p2
rootwait";
This is even worse. Please don't prepopulate any bootargs, otherwise
people may end up assuming that they're actually getting used.
The older one is much cleaner I agree, thank you. I'll just need to test
with both u-boot and linux.
};
gpio-leds {
compatible = "gpio-leds";
- led_r {
- label = "led_r";
- gpios = <&gpio0 0x72 0x1>;
- default-state = "on";
- linux,default-trigger = "heartbeat";
- };
-
- led_g {
- label = "led_g";
- gpios = <&gpio0 0x73 0x1>;
- default-state = "on";
- linux,default-trigger = "heartbeat";
- };
-
- led_b {
- label = "led_b";
- gpios = <&gpio0 0x74 0x1>;
- default-state = "on";
- linux,default-trigger = "heartbeat";
- };
Why remove them? They're hard wired on the board, no?
No this RGB LED is connected to PL, that's for sure.
ps-clk-frequency = <33333333>;
- fclk-enable = <0xf>;
Why?
IIRC on my Z-Turn, I had to take a PL clock back into the PS as AXI
reference clock. See "Connect clocks" here:
https://wiki.hackerspace.pl/projects:zturn-hackers:helloworld
So we need to have the PL clock enabled, no? Or is that only needed for
PL AXI peripherals?
As far as I understand M_AXI_GPn connects AXI slaves implemented on PL
to AXI and S_AXI_HPn provides access for AXI slaves in PS to PL slaves.
So both involve PL and can be disconnected if PL is not clocked.
};
&qspi {
@@ -152,8 +114,8 @@
reg = <0x49>;
};
- adxl345@53 {
- compatible = "adi,adxl34x", "adxl34x";
+ accelerometer@53 {
+ compatible = "adi,adxl345", "adxl345";
You can't just remove compatibles. Device trees are supposed to be
compatible with whatever used them before someone thought they want to
prettify them, so in this case you'd have to add the concrete names in
the list before the abstract ones:
compatible = "adi,adxl345", "adxl345", "adi,adxl34x", "adxl34x";
Yes sorry, I didn't realize that Linux kernel had both.
Best,
Anton
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