Accessing SRAM from Linux on T-Series Processors
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We are going to attach an SRAM on the IFC interface of T1042 processor. I want to know how can we configure IFC in u-boot to support SRAM in addition to other NOR flashes already present on difference chip selects of IFC controller.
In addition to that, how can I access the SRAM afterwards in Linux? Is there any existing generic driver for SRAMs, do I need to write my own driver or can I access the memory mapped SRAM from /dev/mem in userspace? Which one of the mentioned three options is feasible?
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Look at attached file it is .dts file for the T1042d4rdb board.
Find the localbus alias in this file.
See the AN5125 about changing the "ranges":
https://www.nxp.com/docs/en/application-note/AN5125.pdf
Have a great day,
Pavel Chubakov
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