RE: [PATCH 3/6] clk: renesas: r7s9210: Add SPIBSC clock

[Chris Brandt <Chris.Brandt@xxxxxxxxxxx>]

Hi Geert,

> > Well...technically...you don't need the "mtd-rom" partition when using
> > the AXFS file system. But, we can make a rule that you have to use it
> regardless.
> 
> Just wondering, how does AXFS access the FLASH without it being mapped using
> "mtd-rom"?

ioreamp in the driver (the physical address gets passed as an argument).
But, as the DAX people found out, ioremap in a file system drivers is a 
big no-no when you are trying to get a new file system into mainline.
Nicolas (Pitre) also ran into this when he was adding XIP support to 
cramfs last year....hence mtd-rom is mandatory for that.

I would like us to be able to flag a clock as critical without a 
specific use case to look for (ie, looking for mtd-rom).

For RZ/A1, we're all set because we can do it in the board's .dst. Easy!

I just wish it was that easy for RZ/A2 (using the newer renesas-cpg-mssr
driver).


Chris