16:38 <Ermine> seems like board vendors tend to hide maskrom lanes, and leave a button for loader mode. Why do they do that? Maskrom is more useful unless you're not going to overwrite bootloader

16:40 <qschulz> Ermine: I assume because the hardware design guide is a bit misleading

16:40 <qschulz> If the Recovery mode button is in the pressed state when the system starts, (that is,

16:40 <qschulz> SARADC_VIN1 remains at low level (0V)), RK3588 enters Loader programming mode.

16:41 <qschulz> Therefore, when the product does not have a button, when SARADC_VIN1 is left floating, it will be

16:41 <qschulz> unstable, which may affect booting. Therefore, the 10Kohm pull-up resistor of SARADC_VIN1 must be retained

16:41 <qschulz> and cannot be deleted to ensure the default normal startup judgment. In order to facilitate development,

16:41 <qschulz> SARADC_VIN1 is recommended to reserve button or reserve test point.

16:41 <qschulz> This is all wrong of course

16:41 <qschulz> as this is simply a button on some ADC channel but has no impact on the BootROM behavior

16:42 <qschulz> only on U-Boot SPL from Rockchip (there's something similar implemented upstream IIRC)

16:42 <qschulz> so it's like "please do this because our vendor U-Boot relies on this to be stable"

16:48 <Ermine> Ah, and everyone got misguided

16:48 <Ermine> kek