RFC: MPC5200 PSC AC97 driver

[Grant Likely]

On Fri, Apr 18, 2008 at 9:43 AM, Peter Czanik <pczanik at fang.fa.gau.hu> wrote:
> Hello,
>
>  factory:/usr/src/linux-2.6.25 # diff -u
> arch/powerpc/kernel/prom_init.c.orig arch/powerpc/kernel/prom_init.c
>  --- arch/powerpc/kernel/prom_init.c.orig        2008-04-18
> 13:55:07.000000000 +0200
>  +++ arch/powerpc/kernel/prom_init.c     2008-04-18 16:26:51.000000000 +0200
>  @@ -2212,6 +2212,7 @@
>
>  static void __init fixup_device_tree_efika(void)
>  {
>  +       int sound_ci = 1;
>        int sound_irq[3] = { 2, 2, 0 };
>        int bcomm_irq[3*16] = { 3,0,0, 3,1,0, 3,2,0, 3,3,0,
>                                3,4,0, 3,5,0, 3,6,0, 3,7,0,
>  @@ -2257,6 +2258,8 @@
>                rv = prom_getprop(node, "interrupts", prop, sizeof(prop));
>                if (rv == PROM_ERROR) {
>                        prom_printf("Adding sound interrupts property\n");
>  +                        prom_setprop(node, "/builtin/sound", "cell-index",
>  +                                     &sound_ci, sizeof(int));
>                        prom_setprop(node, "/builtin/sound", "interrupts",
>                                     sound_irq, sizeof(sound_irq));
>                }

This probably isn't the ideal solution; but I've got no objection to
bringing it in as a work around until someone can make the driver
cleaner.

However, this change needs to be more robust.  It must first check if
the cell-index property already exists before trying to create it
(just like how adding the interrupts property works).

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.