[U-Boot] [PATCH 2/4] ARM: dra7xx_evm: Enable support for TI PCF8575

[Simon Glass]

Hi Vignesh,

On 26 July 2016 at 00:33, Vignesh R <vigneshr at ti.com> wrote:
>
>
> On Monday 25 July 2016 07:08 PM, Tom Rini wrote:
>> On Mon, Jul 25, 2016 at 06:40:21PM +0530, Vignesh R wrote:
>>
>>> On DRA7, pcf chip present at address 0x21 on i2c1, is used to
>>> switch between cpsw slave0 and slave1. Hence, enable PCF
>>> driver for the same.
>>>
>>> Signed-off-by: Vignesh R <vigneshr at ti.com>
>>> ---
>>>  include/configs/dra7xx_evm.h | 5 +++++
>>>  1 file changed, 5 insertions(+)
>>>
>>> diff --git a/include/configs/dra7xx_evm.h b/include/configs/dra7xx_evm.h
>>> index 0d51aeb86909..4ad8beaf2f75 100644
>>> --- a/include/configs/dra7xx_evm.h
>>> +++ b/include/configs/dra7xx_evm.h
>>> @@ -328,4 +328,9 @@
>>>  #define CONFIG_EEPROM_CHIP_ADDRESS 0x50
>>>  #define CONFIG_EEPROM_BUS_ADDRESS 0
>>>
>>> +/* PCF Support */
>>> +#ifndef CONFIG_SPL_BUILD
>>> +#define CONFIG_PCF8575_GPIO
>>> +#endif
>>
>> We need to invert the logic and undef on SPL, and pick this up normally
>> via Kconfig.
>>
>
> I tried that initially but, the logic does not seem to work. Since, the
> driver is DM only driver, undef'ing CONFIG_PCF8575_GPIO on
> CONFIG_SPL_BUILD does seem to take any effect, the driver is still being
> compiled for SPL build and results in compile time errors. It seems that
> undef in include/configs/* file does not seem to take effect in
> Makefile, but only takes effect in the code. Any idea what am I missing?

Can you have CONFIG_PCF8575_GPIO and CONFIG_SPL_PCF8575_GPIO?

Then

obj-CONFIG_$(SPL_)PCF8575_GPIO += ...

Regards,
Simon