Hi, On Wed, Mar 6, 2013 at 12:23 PM, Rajesh Bhaskaran <cb.rajesh.in@gmail.com> wrote:

Hi all ,

I was trying to write a GPIO driver module for Hawkboard , in order to toggle the LEDs connected to the GPIOs .

I am using a OMAP L138 processor , and am trying to do a ioremap of the physical address space to the Kernel's virtual address space . But I guess I am not able to figure out the exact base address of the GPIO bank .

I am basically trying to toggle the GPIO Bank 6 . I went through the OMAP L138 reference manual , but am unable to find the base address . Afterwards I plan to use the ioctl function to toggle the LEDs .

Attaching herewith the link to the OMAP L138 reference manual . Reference manual : www.ti.com/lit/ug/spruh77a/spruh77a.pdf

Could anyone kindly guide me , on the procedure to decipher the Baseaddress of the GPIO Bank 6 from the Reference manual ?

You need to go through the memory map of the device refer[1] for this. In [1] refer table 2-4 you will find the entire memory map including GPIO. For GPIO refer this [2] too. Regards, --Prabhakar Lad http://in.linkedin.com/pub/prabhakar-lad/19/92b/955 [1] http://www.ti.com/lit/ds/sprs586d/sprs586d.pdf [2] http://www.ti.com/lit/ug/sprufl8b/sprufl8b.pdf

Thanks in advance !

Cheers , ~RCB~

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