Re: how to best ioremap() the ranges part of a "simple-bus" device?

Thus wrote rpjday@crashcourse.ca (rpjday@crashcourse.ca):

i'll need to access that device tree entry and effectively ioremap() slave0's physical address to a usable virtual address.

is there a canonical way to do this? short of manually extracting the appropriate device tree node and reading that property and calling ioremap()? is there a wrapper for that sort of operation, which i imagine must be fairly common?

I guess that of_iomap() does what you need here.

oh, and a pointer to a good example in the current kernel source would, of course, be useful.

cm_init() in arch/arm/mach-integrator/core.c searches a dt node and does maps its address space. If you search for of_iomap() in the sources, you'll find plenty of other examples.