2 Oct
2015
2 Oct
'15
2:16 a.m.
Hi Simon,
On 10/02/2015 06:49 AM, Simon Glass wrote:
Add ioremap() to map physical address to uncached virtual address. We need this to convert the reg address from the device tree.
Can we not rely on the 'ranges' property to sort this out?
The ranges translate address across buses/bridges. The address is still physical address. In the case of nios2, the virtual address map of mmu or nonmmu are different, though the physical address should be the same. So we really need sort of ioremap(). You may find a lots of call to ioremap() in linux drivers. It is quite standard. We also want to use the same dts/dtb for both u-boot and linux. I would suggest ioremap() is the way.
Thanks a lot for your review.
Best regards, Thomas