[U-Boot] [PATCH] integrator: rewrite the AP PCI driver

[Linus Walleij]

On Sat, Mar 3, 2012 at 4:28 PM, Wolfgang Denk <wd at denx.de> wrote:
> In message <1327967374-1727-1-git-send-email-linus.walleij at linaro.org> you wrote:
>> The PCI support for the Integrator AP has apparently never
>> been finished and I strongly suspect that it has never worked,
>> so let's fix it. This is a list of the more or less
>> un-splittable changes done in this driver rewrite:
>>
>> - Replace the register definitions stashed into the config
>>   file (!) with a copy if the register file from the Linux
>>   kernels arch/arm/include/asm/hardware/pci_v3.h
>>
>> - Delete the unreadable gigantic macros that perform the
>>   config accesses and replace them with copyedited code from
>>   Linux arch/arm/mach-integrator/pci_v3.c
>>
>> - Rewrite the rest of the setup code to use the
>>   v3_[read|write][lwb]() accessors.
>>
>> - Enable PCI by default in the AP board configuration.
>>
>> - Fix checkpatch warnings and make code more conformant.
>>
>> Tested-by: Will Deacon <will.deacon at arm.com>
>> Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
>
> This commit causes build warnings on a number of boards, for example:
>
> Configuring for integratorap_cm926ejs - Board: integratorap, Options: CM926EJ_S
> pci.c: In function 'pci_init_board':
> pci.c:474:2: warning: implicit declaration of function 'pciauto_config_init' [-Wimplicit-function-declaration]
> pci.c:286:18: warning: variable 'j' set but not used [-Wunused-but-set-variable]
>
> Please fix!

I've submitted two patches that I think solves the issues properly,
thanks for reporting, especially the last one looks like a dangerously
fragile construct that really needed to be removed.

The first one points to some mess in how some PCI autoscan
stuff is declared, I suspect this could need a closer look, there
seems to be some more functions that should have their declarations
moved to <pci.h> but I didn't quite dare to touch them since I
don't have very many test systems.

Thanks,
Linus Walleij