Re: [U-Boot] Supporting two boards which are almost similar
Hi Sudhakar,
On Fri, Jun 25, 2010 at 16:40:19, Sudhakar Rajashekhara wrote:
Hi,
Spectrum digital has two versions of DM6467 EVM, DM6467 and DM6467T. Though there are some video related differences between these two boards, from U-Boot perspective the only difference the developer need to worry is the different oscillator frequency. DM6467 has 27MHz crystal but DM6467T has 33MHz crystal. Both these EVMs are registered as two different boards in mach-types.h. Existing U-Boot has support DM6467 EVM which has 27MHz crystal. How should I go about adding support for DM6467T EVM which has 33MHz crystal? Do I need to add a new configuration file for this or can I make use of the existing configuration file in any way?
One method I was aware of was, using some scripting from the top level Makefile but I believe this is not recommended.
Any other method of achieving this?
Actually I'm just in the process of answering your question. My immediate response would have been "use -t for mkconfig" but this does not (yet) work for boards.cfg versions. So I'm just in the process of testing a mkconfig extension to allow for similar handling of "BOARD_OPTION1_OPTION2" configurations which will be split into 'CONFIG_MK_{BOARD,OPTION1,OPTION2}' defines.
When we have this, we can use a common config file and use #ifdefs for these CONFIG_MK defines.
Stay tuned Detlev
Hi Detlev,
On Tue, Jun 29, 2010 at 16:19:41, Detlev Zundel wrote:
Hi Sudhakar,
On Fri, Jun 25, 2010 at 16:40:19, Sudhakar Rajashekhara wrote:
Hi,
Spectrum digital has two versions of DM6467 EVM, DM6467 and DM6467T. Though there are some video related differences between these two boards, from U-Boot perspective the only difference the developer need to worry is the different oscillator frequency. DM6467 has 27MHz crystal but DM6467T has 33MHz crystal. Both these EVMs are registered as two different boards in mach-types.h. Existing U-Boot has support DM6467 EVM which has 27MHz crystal. How should I go about adding support for DM6467T EVM which has 33MHz crystal? Do I need to add a new configuration file for this or can I make use of the existing configuration file in any way?
One method I was aware of was, using some scripting from the top level Makefile but I believe this is not recommended.
Any other method of achieving this?
Actually I'm just in the process of answering your question. My immediate response would have been "use -t for mkconfig" but this does not (yet) work for boards.cfg versions. So I'm just in the process of testing a mkconfig extension to allow for similar handling of "BOARD_OPTION1_OPTION2" configurations which will be split into 'CONFIG_MK_{BOARD,OPTION1,OPTION2}' defines.
When we have this, we can use a common config file and use #ifdefs for these CONFIG_MK defines.
Stay tuned Detlev
Were you able to do any further investigation on this? I can take up some testing, if that helps?
Thanks, Sudhakar
participants (2)
-
Detlev Zundel -
Sudhakar Rajashekhara