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<DasChaos>
Hey, i have a more general question? How does rebooting work in a allwinner CPU? Do I need to set a special register or is it working via Watchdog?
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<apritzel>
DasChaos: yes, it's via the watchdog. Program it to the shortest period, disable interrupts and wait (WFI)
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<daschaos>
This is a test from a new client because matrix bridge is terrible 😄
<daschaos>
It seems to work, now my answer can also be send
<gamiee>
welcome chaos
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<daschaos>
apritzel: thanks for the linked snipped is it basically the same for the kernel? I know it will do more for cleanup, but does it also trigger watchdog in the end?
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<mkazantsev>
Hey, did anyone try making 8080 parallel interface work in D1/T113 Display Engine?
<mkazantsev>
Like sending commands to the panel using LCD_CPU_IF_REG's DA and CA bits
<mkazantsev>
My Data/Command line is switching as it should but WR and RD lines are always high
<mkazantsev>
Manual says "When CPU I/F is in IDLE state, it can generate WR/RD timing by setting “Lcd_CPUI/F”. The CS strobe is one DCLK
<mkazantsev>
width, and the WR/RD strobe is half DCLK width.". What does this even mean
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<apritzel>
daschaos: yes, for 32-bit parts we also use the watchdog, AFAIK that's the only way to reset the system. You can reset individual cores, separately, but that doesn't really help for a system reset
<apritzel>
for 64-bit parts the kernel uses a PSCI call, which TF-A then translates into the same watchdog programming
<apritzel>
actually if you boot with UEFI, the UEFI system reset is used, which brings that back on U-Boot's table
<daschaos>
Is uefi aarch64 only?
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<bigunclemax>
Hi, can anyone help me clarify the thermal sensor calibration process for T113/D1 SoCs?
<bigunclemax>
User manual says that read the value from eFuse and write it to the THS_CDATA register
<bigunclemax>
But the BSP driver from TinaLinux does some calculations with this value and only after that writes it to THS_CDATA
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<bigunclemax>
For example, I get 50C in the first case and 26C in the second. At the same time uncalibrated measurement is 38C.
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<apritzel>
bigunclemax: if in doubt, I'd follow the BSP code, not the manual
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<bigunclemax>
apritzel: yes, I think the same. However, when measured the SoCs temperature with a thermal imager, I got a value of about 7-8C more than from a calibrated internal sensor. It seems a little bit strange to me :)
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