According with i.MX28 Application Processor Reference Manual, Rev. 2, 08/2013 GPIO2_20 register have address 0x80018150, which base adress I should use for map it to user-space?
Thank you and excuse my bad english.
in general this physical base address is used for mapping to user-space,
as described for ioremap function :
For gpio usually is used gpio api, refer to sect. sect.220.127.116.11 API for
GPIO attached Linux Manual.
Retrieving data ...