What is the purpose of function omap_get_config()

What is the purpose of function omap_get_config()

[章杰]

Hello,

   I am porting a lcd panel to OMAP2430. It didn't enter the probe
entry of the omapfb. I found that it did not register the device in
fb.c located in arch/arm/plat-omap. Because the function
 omap_get_config( OMAP_TAG_LCD, struct omap_lcd_config )
 which is invoked before platform_device_register returns NULL.

So I wonder the purpose of omap_get_config and where it gets the
configuration. Can anybody tell me in detail? Thanks very much!

Jerry

Re: What is the purpose of function omap_get_config()

[Tony Lindgren]

* 章杰 <zhj8407@gmail.com> [081105 04:31]:
> Hello,
> 
>    I am porting a lcd panel to OMAP2430. It didn't enter the probe
> entry of the omapfb. I found that it did not register the device in
> fb.c located in arch/arm/plat-omap. Because the function
>  omap_get_config( OMAP_TAG_LCD, struct omap_lcd_config )
>  which is invoked before platform_device_register returns NULL.
> 
> So I wonder the purpose of omap_get_config and where it gets the
> configuration. Can anybody tell me in detail? Thanks very much!

The omap specific ATAGs will be going away soon, so please rely only
on the configuration in your board-*.c file.

Tony
--
To unsubscribe from this list: send the line "unsubscribe linux-omap" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: What is the purpose of function omap_get_config()

[章杰]

Hello,

    Thanks for your attention.

     I gotta know the purpose of function omap_get_config. I added an
item related to OMAP_TAG_LCD to my board file, so it can register the
fb device successfully.

     But I have another question. When I compile the frame buffer into
kernel, there is not any output information in my serial terminal
since
Uncompressing Linux............................................................................................
done, booting the kernel. If I compile it as module, it is fine.
However, debugging the module is not convenient on my board. I need to
add it to root filesystem and burn it to the flash.

     I used u-boot as my bootloader. The bootargs is set to be
" noinitrd console=ttyS0,115200n8 root=/dev/mtdblock4 rootfstype=jffs2
init=/linuxrc mem=64M ".

    How can I solve this problem? Thanks very much !

Jerry

2008/11/6 Tony Lindgren <tony@atomide.com>:
> * 章杰 <zhj8407@gmail.com> [081105 04:31]:
>> Hello,
>>
>>    I am porting a lcd panel to OMAP2430. It didn't enter the probe
>> entry of the omapfb. I found that it did not register the device in
>> fb.c located in arch/arm/plat-omap. Because the function
>>  omap_get_config( OMAP_TAG_LCD, struct omap_lcd_config )
>>  which is invoked before platform_device_register returns NULL.
>>
>> So I wonder the purpose of omap_get_config and where it gets the
>> configuration. Can anybody tell me in detail? Thanks very much!
>
> The omap specific ATAGs will be going away soon, so please rely only
> on the configuration in your board-*.c file.
>
> Tony
>