[PATCH v2 13/17] dt-bindings: mtd: nvmem-cells: Fix example

Rob Herring robh at kernel.org
Thu Nov 10 08:59:06 PST 2022

On Fri, Nov 04, 2022 at 05:47:14PM +0100, Miquel Raynal wrote:
> There is no such thing as a "ranges" property within an nvmem-cells
> node. There is no use of it, it is anyway not pictured anywhere that
> this is valid, so drop it from the example.

For a memory mapped device such as parallel NOR flash. It would be 
perfectly fine to translate a nvmem cell 'reg' address to a CPU address. 
If the partitions are not memory mapped, then it's a gray area. Whether 
it makes sense to translate just to just the absolute offset of the 
flash device, maybe or maybe not. At a minimum, 'ranges' just means 
can translate to the parent address space. The Linux DT translate code 
only supports the full translation to CPU addresses, but then it mainly 
just supports creating resources.


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