Ok i solved my problems, but ...
The file /driver/serial/mpc52xx_uart.c in function
mpc52xx_uart_of_enumerate(void) try to keep find the device number with:
...
/* Is a particular device number requested? */
devno = get_property(np, "port-number", NULL);
...
I set the device tree in order to use PSC4 in uart mode enabling:
[EMAIL PROTECTED] { // PSC4
device_type = "serial";
compatible = "mpc5200b-psc-uart\0mpc5200-psc-uart";
port-number = <3>; // Logical port assignment
cell-index = <3>;
reg = <2600 100>;
interrupts = <2 b 0>;
interrupt-parent = <&mpc5200_pic>;
};
But port-number = <3> seems less!
Any idea??
--- Ven 7/11/08, Angelo <[EMAIL PROTECTED]> ha scritto:
> Da: Angelo <[EMAIL PROTECTED]>
> Oggetto: Serial console on board based on Lite5200b
> A: [email protected]
> Data: Venerdì 7 novembre 2008, 13:10
> Hi, I have a board based on the Lite5200b, except that the
> serial console is on PSC4 instead of PSC1.
>
> Using the a custom U-boot (1.2.0) and kernel 2.6.21
> (compiled for powerpc), I managed to get U-boot to output on
> the console on PSC4, but the kernel
> does not.
>
> I had just modified lite5200b.dts in some points:
>
> 1- My memory is 128Mb
> 2- I don't need eth,mdio,ata so I had commented
> 3- Enable PSC4
> 4- Added the chosen node:
>
> chosen {
> linux,stdout-path =
> "/[EMAIL PROTECTED]/[EMAIL PROTECTED]";
> bootargs = "console=ttyPSC4,115200";
> };
>
> Debugging my board i notified that u-boot read & modify
> the device tree blob adding the chosen node:
> chosen{
>
> name = "chosen";
>
> bootargs = "console=ttyPSC3";
> linux,platform = <600>;
> linux,initrd-start = <7e2e000>;
> linux,initrd-end = <7f0fbf2>;
> linux,stdout-path =
> "/[EMAIL PROTECTED]/[EMAIL PROTECTED]";
> };
>
> I follow step by step the kernel start procedure.. and I
> notify that in setup_arch funtion is called
> find_legacy_serial_ports, but when is done
> if(legacy_serial_console >= 0)
> legacy_serial_console is equal to -1.
>
> However, it is not sufficient. What am I missing?
>
> Thank you!
>
>
>
> Unisciti alla community di Io fotografo e video, il
> nuovo corso di fotografia di Gazzetta dello sport:
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