With regard to "Error No. 26" (quoted below), has any work been done in the kernel or serial drivers to compensate for this error?
I've observed problems only when both UARTs were enabled, so I suppose one solution is to enable only one UART. Error No. 26: Concurrent writes occur to the UART registers when UAFR[0] is set Detailed Description: The UART Alternate Function Register (UAFR) enables software to write concurrently to both UART1 and UART2 registers with the same write operation. However, this action occurs when the UARTs are individually written to, but in addition, concurrent writes to the UART registers occur as a result of writing to other EUMBAR registers, including the error injection registers, when UAFR[0] is set. Projected Impact: Concurrent writes occur to the UART registers when UAFR(0) is set and EUMBAR registers are written to. Work Arounds: Set UAFR(0) only for concurrent writes to UART registers. Clear this bit immediately afterwards. Projected Solution: No plans to fix. http://www.freescale.com/files/32bit/doc/errata/MPC8245CE.pdf ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
