[U-Boot] [PATCH 3/8] ZOOM2 Add support for debug board detection.

[Tom <Tom.Rix@windriver.com>]

Dirk Behme wrote:
> Hi Tom,
>
> Tom Rix wrote:
>> https://omapzoom.org/gf/project/omapzoom/wiki/?pagename=GettingStartedWithZoomII_AKA_OMAP34XII_MDP 
>>
>>
>> The zoom2 has an auxillary board that contains the serial, net, jtag and
>> battery simulator. This change supports a runtime check if the debug 
>> board is
>> connected.
>>
>> Signed-off-by: Tom Rix <Tom.Rix@windriver.com>
>> ---
>> board/omap3/zoom2/Makefile | 3 +-
>> board/omap3/zoom2/debug_board.c | 57 
>> +++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 59 insertions(+), 1 deletions(-)
>> create mode 100644 board/omap3/zoom2/debug_board.c
>>
>> diff --git a/board/omap3/zoom2/Makefile b/board/omap3/zoom2/Makefile
>> index 088b8cb..b8fa5a7 100644
>> --- a/board/omap3/zoom2/Makefile
>> +++ b/board/omap3/zoom2/Makefile
>> @@ -25,7 +25,8 @@ include $(TOPDIR)/config.mk
> ...
>> --- /dev/null
>> +++ b/board/omap3/zoom2/debug_board.c
> ...
>> +static void zoom2_debug_board_detect (void)
>> +{
>> + unsigned int val;
>> + /*
>> + * GPIO to query for debug board
>> + * 158 db board query, bank 5, index 30
>> + */
>> + gpio_t *gpio5_base = (gpio_t *) OMAP34XX_GPIO5_BASE;
>> +
>> + val = __raw_readl (&gpio5_base->datain);
>
> Is there any special reason why you use __raw_readl() instead of just 
> readl() here? Looking at ARM's io.h, they seem to map to the same macro?
>
This code will go away once I finish bringing in the kernel's gpio code
I will look for other instances of __raw and conform.
Tom

> Best regards
>
> Dirk