I'm still trying to get UCC UART to work on my MPC8358 with
the 2.6.33.3 kernel.
When I try to send data to the port, there is no output, not
even any interrupts on the device. What I see is that the UART
driver seems to initialize fine and pushes characters into
the output buffers & descriptors. However, there are no
interrupts hence it just sits there...
My device tree entry for this device now looks like this:
/* ttyQE0 (UCC3) */
serial_qe0: ser...@4000 {
device_type = "serial";
compatible = "ucc_uart";
cell-index = <3>;
reg = <0x2200 0x200>;
interrupts = <34>;
interrupt-parent = <&qeic>;
port-number = <0>;
rx-clock-name = "brg1";
tx-clock-name = "brg1";
};
* Are there any known issues with this driver?
* Is there any way to get a handle on why no data is moving?
* Is there some way to tell if the QE even sees the descriptors?
* The driver and documentation mention a "soft UART" mode for
chips with broken UART hardware. How do I know if my board
has functioning UART hardware?
Note: I have UCC1+UCC2 working great with ethernet.
Thanks for any pointers or ideas
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
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