How to use Localbus on 5200B w/ 2.6.29.1

[Albrecht Dreß]

Hi all,








<snip>
localbus {
        compatible = "fsl,lpb";
        #address-cells = <2>;
        #size-cells = <1>;
        reg = <0xf0000300 0x32>;
        ranges = < 0 0 0xfc000000 0x02000000
                   3 0 0xf0020000 0x00010000 >;
        fl...@0,0 {
                compatible = "cfi-flash";
                reg = <0 0x0 0x2000000>;  // 32 MB

                #size-cells = <1>;
                #address-cells = <1>;
        };

        my...@3,0 {
                compatible = "mydev";
                reg = <0 0x0 0x100>;              // 256 Bytes, 32 used
                interrupts = <1 3 2>;             // todo - level?
                interrupt-parent = <&mpc5200_pic>;
        };
};
</snip>

I see in /sys/devices

<snip>
# ls -al /sys/devices/
drwxr-xr-x    7 0        0               0 Jan  1 00:00 .
drwxr-xr-x   11 0        0               0 Jan  1 00:00 ..
drwxr-xr-x   31 0        0               0 Jan  1 00:00 f0000000.soc5200

drwxr-xr-x    2 0        0               0 Jan  1 00:00 platform
drwxr-xr-x    5 0        0               0 Jan  1 00:00 system
drwxr-xr-x    8 0        0               0 Jan  1 00:00 virtual
</snip>



In /sys/devices/f0000300.localbus, I see

<snip>
# ls -al /sys/devices/f0000300.localbus/
drwxr-xr-x    4 0        0               0 Jan  1 00:00 .
drwxr-xr-x    7 0        0               0 Jan  1 00:00 ..
-r--r--r--    1 0        0            4096 Jan  1 00:00 devspec
drwxr-xr-x    2 0        0               0 Jan  1 00:00 fc000000.flash
drwxr-xr-x    2 0        0               0 Jan  1 00:00 fc000000.mydev
-r--r--r--    1 0        0            4096 Jan  1 00:00 modalias
-r--r--r--    1 0        0            4096 Jan  1 00:00 name

-rw-r--r--    1 0        0            4096 Jan  1 00:00 uevent
</snip>





Any help would be really welcome!

Thanks in advance,
Albrecht.

I have a question about the definition of the localbus on the Freescale 5200B (I'm testing with the Lite5200B board) with Kernel 2.6.29.1 which I could not figure out with the docs and the list archives... When I use 'compatible = "fsl,mpc5200b-lpb";' in the dts file, the localbus and any nodes below it don't show up in /sys/devices. When I use the following (top-level, not under the soc node) in the dts file bank-width = <1>; // width in bytes of the flash bank device-width = <1>; // one devices on each bank drwxr-xr-x 4 0 0 0 Jan 1 00:00 f0000300.localbus Does this mean that the documentation (and some existing dts files) are inaccurate? What is the proper way to specify the localbus (or, in particular, it's child nodes) on the 5200B? lrwxrwxrwx 1 0 0 0 Jan 1 00:00 subsystem -> ../../bus/of_platform which is also confusing, as both devices appear to have the same address? Any idea what goes wrong here? The flash device itself (mydev isn't present yet...) also doesn't work although mtd is enabled, but that's probably a different problem.

pgpP00KTgQBWJ.pgp
Description: PGP signature

_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev