enabling GPIO acceess on ti8148 platform through U-BOOT

there may be some related information available in http://processors.wiki.ti.com/index.php/DM814x_C6A814x_AM387x_PSP_User_Guide#GPIO_Driver 

Thanks for the reply

But That is not for U-BOOT it is for linux kernel

I am looking to enable GPIOs in bootloader.

Currently there is no GPIO module in U-BOOT for TI8148 as it is there for TI8168.

I have tried to emulate TI8168 GPIO access code in TI8148 but the board hangs.

The exact steps which I did are

1)enable interface clock  for GPIO in PRCM.

2)Enable GPIO bank using GPIO_CTRL block.

3)The set the direction

4)read write the data.

Let me know if I am missing something.

Reagrds,

Prashant. 

Hi Prashant,

First and foremost thing to do is PINMUX configuration for all the GPIO's which you are using. (http://e2e.ti.com/support/embedded/linux/f/354/p/152492/553172.aspx#553172)

http://processors.wiki.ti.com/index.php/DM814x_AM387x_PSP_User_Guide#Modifying_Pin_Mux_settings (This page is for kernel, you can do the similar stuff in u-boot as well)

PS: Don't modify the pinmux settings for lines which are required for booting

Regards

AniKumar

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