Hi folks,
While looking into SPI boot failures on our am335x based boards I needed to enable the debug UART to understand where u-boot was getting stuck. I first enabled the following config options:
* CONFIG_DEBUG_UART=y * CONFIG_DEBUG_UART_BASE=0x44e09000 * CONFIG_DEBUG_UART_CLOCK=48000000 * CONFIG_DEBUG_UART_OMAP=y * CONFIG_DEBUG_UART_SHIFT=2 * CONFIG_DEBUG_UART_ANNOUNCE=y
With these options enabled the debug UART did not function, no output was printed at all.
This was fixed by reverting commit 0dba45864b2a ("arm: Init the debug UART"), as was discussed in another recent thread [1].
[1]: https://lore.kernel.org/all/CAJs94EYv55QBjvqB94Bwy-wv2_u7tJ+AMP0Ho_XAC8eqjT8...
Has anyone had chance to look into this further?
It would be good to get this fixed so that the debug UART can be used on these boards by simply enabling the correct config options. I'm happy to help look into this if anyone has any pointers on where to start.
Thanks,