[U-Boot] [PATCH 07/13] arm: zynq: Use separate device tree instead of embedded

[Michal Simek]

On 08/31/2015 03:54 PM, Simon Glass wrote:
> Hi Michal,
> 
> On 31 August 2015 at 05:24, Michal Simek <monstr at monstr.eu> wrote:
>> On 08/29/2015 05:10 PM, Simon Glass wrote:
>>> Production boards should not use CONFIG_OF_EMBED. Fix this for the Zybo
>>> boards.
>>
>> Zynq boards?
>>
>> As you see I have enabled OF_EMBED some weeks ago.
>> zynq: Make CONFIG_OF_EMBED default case
>> 98b532b42079a7ffd617ce0330d6778288b7c535
>>
>> What's the reason not to use CONFIG_OF_EMBED for production boards?
>> Strictly speaking none of these boards are production one.
>> I would label them more as refence boards, development boards.
> 
> Well I mean that we should not have boards in the tree that use this
> option, It has been a long-standing convention since device tree
> support was added - see README.fdt-control. I'll send a patch to add
> this note to Kconfig.

ok then do we want to support this option? If this shouldn't be enabled
in any config in the tree? (Note: someone has to enable that and keep
building u-boot to ensure that this feature still work)

The reason why I have enabled that was that using u-boot-dtb.img is
breaking all users because they have to start to change a lot of things.
That's why having OF_EMBED enabled was less painful.
Users which use these boards just don't recognize any change when this
feature is enabled.

...

>>> diff --git a/include/configs/zynq-common.h b/include/configs/zynq-common.h
>>> index e7ab50a..aa4785f 100644
>>> --- a/include/configs/zynq-common.h
>>> +++ b/include/configs/zynq-common.h
>>> @@ -319,7 +319,11 @@
>>>  #define CONFIG_SYS_MMCSD_FS_BOOT_PARTITION     1
>>>  #define CONFIG_SPL_LIBDISK_SUPPORT
>>>  #define CONFIG_SPL_FAT_SUPPORT
>>> -#define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME     "u-boot.img"
>>> +#ifdef CONFIG_OF_CONTROL
>>> +# define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME     "u-boot-dtb.img"
>>> +#else
>>> +# define CONFIG_SPL_FS_LOAD_PAYLOAD_NAME     "u-boot.img"
>>> +#endif
>>>  #endif
>>>
>>>  /* Disable dcache for SPL just for sure */
>>>
>>
>> this was removed by Masahiro long time ago.
>> kconfig: move CONFIG_OF_* to Kconfig
>> sha1: 783e6a72b8278d59854ced41a4696c9a14abbb0b
> 
> What was moved?

Using different names for u-boot image.

Thanks,
Michal

-- 
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Microblaze cpu - http://www.monstr.eu/fdt/
Maintainer of Linux kernel - Xilinx Zynq ARM architecture
Microblaze U-BOOT custodian and responsible for u-boot arm zynq platform


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