[U-Boot] [PATCH] OMAP3: igep0020: Add pad config for WIFI/BT GPIOs

[Anders Hedlund]

2012/10/29 Enric Balletbo Serra <eballetbo at gmail.com>:
> 2012/10/29 Anders Hedlund <anders.j.hedlund at gmail.com>:
>> 2012/10/29 Enric Balletbo Serra <eballetbo at gmail.com>:
>>> Hi,
>>>
>>> 2012/10/28 Anders Hedlund <anders.j.hedlund at gmail.com>:
>>>> This adds support for WIFI/BT GPIOs which were previously missing.
>>>>
>>>> Signed-off-by: Anders Hedlund <anders.j.hedlund at gmail.com>
>>>> Cc: Enric Balletbo i Serra <eballetbo at iseebcn.com>
>>>> Cc: Jonas Zetterberg <jozz at jozz.se>
>>>> ---
>>>>  board/isee/igep0020/igep0020.h |    6 ++++++
>>>>  1 file changed, 6 insertions(+)
>>>>
>>>> diff --git a/board/isee/igep0020/igep0020.h b/board/isee/igep0020/igep0020.h
>>>> index 3335ecc..283b75e 100644
>>>> --- a/board/isee/igep0020/igep0020.h
>>>> +++ b/board/isee/igep0020/igep0020.h
>>>> @@ -132,6 +132,12 @@ static void setup_net_chip(void);
>>>>         MUX_VAL(CP(MMC1_DAT1),      (IEN  | PTU | EN  | M0)) /* MMC1_DAT1 */\
>>>>         MUX_VAL(CP(MMC1_DAT2),      (IEN  | PTU | EN  | M0)) /* MMC1_DAT2 */\
>>>>         MUX_VAL(CP(MMC1_DAT3),      (IEN  | PTU | EN  | M0)) /* MMC1_DAT3 */\
>>>> +       MUX_VAL(CP(CAM_HS),         (IDIS | PTU | DIS | M4)) /* GPIO_94 */\
>>>> +       MUX_VAL(CP(CAM_VS),         (IDIS | PTU | DIS | M4)) /* GPIO_95 */\
>>>> +       MUX_VAL(CP(MMC2_DAT4),      (IDIS | PTU | DIS | M4)) /* GPIO_136 */\
>>>> +       MUX_VAL(CP(MMC2_DAT5),      (IDIS | PTU | DIS | M4)) /* GPIO_137 */\
>>>> +       MUX_VAL(CP(MMC2_DAT6),      (IDIS | PTU | DIS | M4)) /* GPIO_138 */\
>>>> +       MUX_VAL(CP(MMC2_DAT7),      (IDIS | PTU | DIS | M4)) /* GPIO_139 */\
>>>>         MUX_VAL(CP(UART3_TX_IRTX),  (IDIS | PTD | DIS | M0)) /* UART3_TX */\
>>>>         MUX_VAL(CP(UART3_RX_IRRX),  (IEN  | PTD | DIS | M0)) /* UART3_RX */\
>>>>         MUX_VAL(CP(I2C1_SCL),       (IEN  | PTU | EN  | M0)) /* I2C1_SCL */\
>>>> --
>>>> 1.7.10.4
>>>>
>>>
>>> Thanks for the patch but u-boot should only mux the pins they use, as
>>> u-boot does not use wifi this is not applicable here.
>>>
>>> Did you have problems with wifi ? Then we should check if these pins
>>> are muxe'd at kernel level, I think so.
>>
>> Yes. In linux kernel v3.6 WIFI/BT does not work due to this issue. I
>> also have a fix for this but in my oppinion this kind of HW
>> configuration should be made in the boot loader.
>
> This was discussed before in this ML, and the result of the discussion
> was that bootloaders should set only the minimum required for the
> uboot functionality and kernel boot. So the way to fix this problem is
> muxing these pins in kernel.

Ok. Thanks for this info. I'll withdraw this patch and make one of the
linux kernel instead.

Br,
Anders

>
> Cheers,
>    Enric
>
>>
>> Br,
>> Anders
>>
>>>
>>> Cheers,
>>>    Enric