[U-Boot] arm, arm335x: save_omap_boot_params question

[Sricharan R <r.sricharan@ti.com>]

On Thursday 13 June 2013 10:49 AM, Heiko Schocher wrote:
> Hello Sricharan,
>
> Am 13.06.2013 07:08, schrieb Sricharan R:
>> On Wednesday 12 June 2013 06:19 PM, Tom Rini wrote:
>>> On Wed, Jun 12, 2013 at 02:39:13PM +0200, Heiko Schocher wrote:
>>>> Hello Tom,
>>>>
>>>> Am 12.06.2013 14:28, schrieb Tom Rini:
>>>>> On Wed, Jun 12, 2013 at 10:56:01AM +0200, Heiko Schocher wrote:
>>>>>> Hello tom,
>>>>>>
>>>>>> your
>>>>>>
>>>>>> commit 4596dcc1d4ea5763e0f92cf5becd9fc7d4c6e674
>>>>>> Author: Tom Rini <trini@ti.com>
>>>>>> Date:   Fri May 31 12:31:59 2013 -0400
>>>>>>
>>>>>>     am33xx/omap: Move save_omap_boot_params to omap-common/boot-common.c
>>>>>>
>>>>>> introduced, that all am335x based boards must call
>>>>>> save_omap_boot_params() from the board specific s_init function. I
>>>>>> just stumbled over it, as I updated to current head and my upcoming
>>>>>> am335x based siemens boards didn't boot anymore ... should we think
>>>>>> about to move this s_init() to a common place, and extract board
>>>>>> specific things? Maybe arch/arm/cpu/armv7/omap-common/boot-common.c
>>>>>> is a place for it?
>>>>> I think the first non-am335x_evm board pulled the code we need in board/
>>>>> a bit too far in the board-specific direction.
>>>>>
>>>>> Whacking the WDT (which could be done differently I imagine based on
>>>>> your other patches), calling save_omap_boot_params and UART stuff is
>>>>> common.  Figuring out which DDR and how is not.  I think we can learn
>>>>> from omap-common/hwinit-common.c::s_init but need to have our own in
>>>>> arch/arm/cpu/armv7/am33xx/board.c and declared __weak or wrapped with
>>>>> CONFIG_AM33XX since TI814x (and TI816x) are different.  Or maybe some
>>>>> more thinking share still.
>>>>>
>>>>> Do you have time for this?  Thanks!
>>>> I try to find some ;-)
>>>>
>>>> Maybe something like this:
>>>>
>>>> add in arch/arm/cpu/armv7/am33xx/board.c a weak s_init(), which all
>>>> am35xx boards use, and call in this s_init() a s_init_board() which
>>>> all am335x boards must have defined?
>>> s/s_init_board/sdram_init/ and yes.  If we whack the UART stuff out into
>>> uart_enable (ala ti814x) and add a board_enable_early_pinmux (for the
>>> muxes needed, and put this right after save_omap_...) we might not need
>>> to make s_init __weak.
>>    Just curious here, why the save_omap_boot_params is breaking things
>>    in first place for your SOC. Was it not used before ??
>>
>>    Also regarding DDR, is it emif and DDR3 in all those boards ?
> I am currently porting 3 am335x boards to mainline and worked with
> a few weeks old tree, where the save_omap_boot_params() patch was not
> in mainline.
>
> I am more or less finished the porting and just did a rebase to current
> head ... and due to missing save_omap_boot_params() in my board file,
> spl not found u-boot img in nand ...
>
> In the meantime I posted a patch, which moves save_omap_boot_params()
> to a common place, see here:
>
> [U-Boot] arm, am33xx: move s_init to a common place
> http://patchwork.ozlabs.org/patch/250973/
>
> bye,
> Heiko
 oh ok, understood.. Thanks..

Regards,
 Sricharan