[maemo-leste] [PATCH] arm: Remove nokia_rx51 board

[Adam Ford]

On Wed, Jun 16, 2021 at 6:26 AM Ivaylo Dimitrov
<ivo.g.dimitrov.75 at gmail.com> wrote:
>
> Hi,
>
> On 15.06.21 г. 15:34 ч., Tom Rini wrote:
> > On Tue, Jun 15, 2021 at 08:40:30AM +0300, Ivaylo Dimitrov wrote:
> >> Hi,
> >>
> >> On 22.05.21 г. 0:36 ч., Pali Rohár wrote:
> >>> On Friday 21 May 2021 10:44:18 Tom Rini wrote:
> >>>> On Wed, May 19, 2021 at 11:52:03AM -0400, Tom Rini wrote:
> >>>>> On Wed, May 19, 2021 at 03:27:48PM +0200, Pali Rohár wrote:
> >>>>>
> >>>>>> On Tuesday 18 May 2021 21:26:40 Tom Rini wrote:
> >>>>>>> This board has not been converted to CONFIG_DM_USB by the deadline.
> >>>>>>> Remove it.
> >>>>>>
> >>>>>> I'm very disappointed that you want to remove Nokia N900 from U-Boot.
> >>>>>>
> >>>>>> I was waiting waiting half of year because other developers did not
> >>>>>> react to issues which were introduced and neither to patches which I
> >>>>>> sent (+ trying to remind open issues). And also I was waiting another
> >>>>>> half of year until other N900 related patches were merged. So the whole
> >>>>>> slowdown was not caused by me, why it is taking so long.
> >>>>>>
> >>>>>> Now there is still one N900 DM related patch waiting for review. I'm
> >>>>>> converting code step by step.
> >>>>>>
> >>>>>> So the ball is not on my side.
> >>>>>
> >>>>> So, what patch(es) need to be applied to get DM_USB enabled?  Thanks.
> >>>>
> >>>> I don't see any open patches from you that look related to enabling
> >>>> DM_USB on the platform.  If you want to disable USB on the platform for
> >>>> now instead, that's fine too.
> >>>
> >>
> >> I tried to migrate the latest master to DM_USB, but unfortunately the
> >> results are pretty much sad - adding OF_CONTROL (which is a prerequisite to
> >> have DM_USB IIUC) and OF_BOARD (so binary to be compiled), adds ~100k to the
> >> size of the u-boot binary, so it becomes 370284 bytes. Given that we have
> >> less than 256k of storage space for the u-boot, the produced binary cannot
> >> be used on n900 the same way current (no DM_USB) binary is used.

Have you experimented with enabling LTO?  I was successful in enabling
LTO on an OMAP3530 and a DM3730 which really helped reduce the code
size and I didn't notice any obvious regressions.

adam
> >>
> >> As I see it, there are not much options left - u-boot on N900 is not SPL, so
> >> we can't use OF_PLATDATA, which in turn always links libfdt.
> >> Also, if I read the code (usb-uclass.c) correctly, enabling DM_USB requires
> >> the board to be converted to DT and this is way bigger change.
> >>
> >> Please advice on how to proceed.
> >
> > Please post your WIP patches, thanks.
> >
>
> Sorry, I am not sure I understand what patches you want me to post:
>
> WDT patch has already been sent couple of months ago -
> https://lists.denx.de/pipermail/u-boot/2021-March/443868.html
> Do you want it to be rebased and resend?
>
> DM_USB, I just started writing one and I immediately hit the OF_CONTROL
> requirement. Enabling OF_CONTROL requires a full blown migration to DT,
> which is a huge task and not really equal to "Please update the board to
> use CONFIG_DM_USB...". Without OF_CONTROL, I simply get link failures:
>
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> DWARF error: could not find abbrev number 3998
> /tmp/cc0BOqms.ltrans0.ltrans.o: in function `usb_child_post_bind':
> <artificial>:(.text+0x5672): undefined reference to
> `ofnode_read_u32_default'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> <artificial>:(.text+0x568c): undefined reference to
> `ofnode_read_u32_default'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> /tmp/cc0BOqms.ltrans0.ltrans.o: in function `usb_scan_device':
> <artificial>:(.text+0x6c84): undefined reference to `ofnode_first_subnode'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> <artificial>:(.text+0x6c96): undefined reference to `ofnode_read_u32'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> <artificial>:(.text+0x6ca4): undefined reference to `ofnode_next_subnode'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> /tmp/cc0BOqms.ltrans0.ltrans.o:(.u_boot_list_2_uclass_driver_2_usb+0x8):
> undefined reference to `dm_scan_fdt_dev'
> /usr/lib/gcc-cross/arm-linux-gnueabi/8/../../../../arm-linux-gnueabi/bin/ld:
> /tmp/cc0BOqms.ltrans0.ltrans.o:(.u_boot_list_2_uclass_driver_2_usb_hub+0x8):
> undefined reference to `dm_scan_fdt_dev'
>
> Fixing those requires enabling of OF_CONTROL and this in turn means the
> board must be migrated to DT, unless I am missing something. That's why
> my "please advice..." stance.
>
> Thanks,
> Ivo