On Wed, Jun 16, 2021 at 08:10:08AM -0400, Tom Rini wrote:
> On Wed, Jun 16, 2021 at 09:02:16AM +0300, Ivaylo Dimitrov 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.
> > > > 
> > > > 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.
> 
> Please post the patches that bring you to the above link errors, yes,
> thanks.

To be clearer, finish up a patch that completes the migration but is too
large to install on the hardware so that others can take a look.

-- 
Tom