[U-Boot] [PATCH 6/7] Tegra30: Add generic Tegra30 build support

[Stephen Warren <swarren@wwwdotorg.org>]

On 10/03/2012 03:56 PM, Tom Warren wrote:
> Stephen,
> 
> On Wed, Oct 3, 2012 at 1:38 PM, Stephen Warren <swarren@wwwdotorg.org> wrote:
>> On 10/02/2012 04:45 PM, Tom Warren wrote:
>>> This patch adds basic Tegra30 (T30) build support - no specific
>>> board is targeted.
>>>
>>
>>> diff --git a/board/nvidia/common/board.c b/board/nvidia/common/board.c
>>
>>> +#ifdef CONFIG_USB_EHCI_TEGRA
>>> +#include <asm/arch/usb.h>
>>> +#endif
>>
>> That seems unrelated.
> 
> It's related because I don't have a usb.h file for Tegra30 yet (not
> used/needed), and this is a common file, so I have to #ifdef the
> inclusion or Cardhu won't build. I could put an empty usb.h file in
> arch-tegra30, but I don't like that approach and there's a need for
> this if someone turns off USB support in a Tegra20 build. The code
> further down in the file uses the same #ifdef.

Ah right, that makes sense.

>>> +#ifdef CONFIG_TEGRA30
>>> +#include <asm/arch/pinmux-config-common.h>
>>> +#endif
>> ...
>>>  /*
>>> + * Routine: pinmux_init
>>> + * Description: Do individual peripheral pinmux configs
>>> + */
>>> +static void pinmux_init(void)
>>> +{
>>> +#if defined(CONFIG_TEGRA30)
>>> +     pinmux_config_table(tegra3_pinmux_common,
>>> +             ARRAY_SIZE(tegra3_pinmux_common));
>>> +
>>> +     pinmux_config_table(unused_pins_lowpower,
>>> +             ARRAY_SIZE(unused_pins_lowpower));
>>> +#endif
>>> +}
>>
>> I think that should be done by the Cardhu board file, since the data is
>> Cardhu-specific.
> 
> If I move pinmux_init to cardhu.c, I'll need matching (empty) funcs in
> all the other board files, since it's called in board_early_init_f
> later in board.c. Or it could be made a weak function that's only
> overridden in cardhu files. But all this is more that I wanted to
> change in this first pass of T30/Cardhu support - I didn't want to
> touch any of the Tegra20 builds that I didn't have to.

A weak function certainly seems the way to go; all (or at least most of)
the other per-device pinmux/GPIO setup functions are all implemented
this way now.