[U-Boot] [PATCH 4/5] omap3_beagle: support findfdt and loadfdt for devicetree support

[Robert Nelson]

On Thu, Jul 11, 2013 at 5:03 PM, Nishanth Menon <nm at ti.com> wrote:
> On 17:02-20130711, Robert Nelson wrote:
>> On Thu, Jul 11, 2013 at 4:52 PM, Nishanth Menon <nm at ti.com> wrote:
>> > For folks not using concatenated device tree with uImage, having
>> > an handy function to find and load device tree is very handy.
>> >
>> > So introduce findfdt and loadfdt and run findfdt by default to make
>> > it easier on user scripts.
>> >
>> > Signed-off-by: Nishanth Menon <nm at ti.com>
>> > ---
>> >  include/configs/omap3_beagle.h |   17 +++++++++++++++++
>> >  1 file changed, 17 insertions(+)
>> >
>> > diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
>> > index bdeee17..7833208 100644
>> > --- a/include/configs/omap3_beagle.h
>> > +++ b/include/configs/omap3_beagle.h
>> > @@ -210,6 +210,8 @@
>> >  #define CONFIG_EXTRA_ENV_SETTINGS \
>> >         "loadaddr=0x80200000\0" \
>> >         "rdaddr=0x81000000\0" \
>> > +       "fdt_high=0xffffffff\0" \
>> > +       "fdtaddr=0x80f80000\0" \
>> >         "usbtty=cdc_acm\0" \
>> >         "bootfile=uImage\0" \
>> >         "ramdisk=ramdisk.gz\0" \
>> > @@ -250,6 +252,19 @@
>> >                 "omapdss.def_disp=${defaultdisplay} " \
>> >                 "root=${nandroot} " \
>> >                 "rootfstype=${nandrootfstype}\0" \
>> > +       "findfdt=" \
>> > +               "if test $beaglerev = AxBx; then " \
>> > +                       "setenv fdtfile omap3-beagle.dtb; fi; " \
>> > +               "if test $beaglerev = Cx; then " \
>> > +                       "setenv fdtfile omap3-beagle.dtb; fi; " \
>> > +               "if test $beaglerev = xMA; then " \
>> > +                       "setenv fdtfile omap3-beagle-xm.dtb; fi; " \
>> > +               "if test $beaglerev = xMB; then " \
>> > +                       "setenv fdtfile omap3-beagle-xm.dtb; fi; " \
>>
>> There is no need for the "xMB" variant, as the gpio pins used for
>> identification where never changed from the xMA when the newer silcon
>> was used for the xMB (i guess if we look at the omap's es revision, we
>> could figure out which are xMB's, but right now that isn't done in
>> u-boot....)
> I suppose then the following is ok to do as well?
> diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
> index c686f40..6094b0f 100644
> --- a/board/ti/beagle/beagle.c
> +++ b/board/ti/beagle/beagle.c
> @@ -369,16 +369,6 @@ int misc_init_r(void)
>                                         TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
>                                         TWL4030_PM_RECEIVER_DEV_GRP_P1);
>                 break;
> -       case REVISION_XM_B:
> -               printf("Beagle xM Rev B\n");
> -               setenv("beaglerev", "xMB");
> -               MUX_BEAGLE_XM();
> -               /* Set VAUX2 to 1.8V for EHCI PHY */
> -               twl4030_pmrecv_vsel_cfg(TWL4030_PM_RECEIVER_VAUX2_DEDICATED,
> -                                       TWL4030_PM_RECEIVER_VAUX2_VSEL_18,
> -                                       TWL4030_PM_RECEIVER_VAUX2_DEV_GRP,
> -                                       TWL4030_PM_RECEIVER_DEV_GRP_P1);
> -               break;
>         case REVISION_XM_C:
>                 printf("Beagle xM Rev C\n");
>                 setenv("beaglerev", "xMC");

Correct, as a cleanup we can nuke that xMB section..

For some bike shed paining we could rename:

Beagle xM Rev A -> Beagle xM Rev A/B

Above that too. ;)

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/