[PATCH v4 02/10] pinctrl: mvebu: dove pinctrl driver
Russell King - ARM Linux
linux at arm.linux.org.uk
Tue Jun 18 11:11:16 EDT 2013
On Tue, Jun 18, 2013 at 05:02:49PM +0200, Linus Walleij wrote:
> Nowadays I would do the above with regmap_update_bits().
> Mutual exclusion for read-modify-write of individual bits in a
> register is one of those cases where doing a regmap over
> a memory-mapped register range makes a lot of sense.
> (drivers/mfd/syscon.c being a nice example)
So, for that solution we need to have some kind of global regmap per
register or somesuch. Then you run into regmap needing a struct
device - well, with a shared register, which struct device do you
use, or do you have to invent one?
That sounds more heavy-weight than is really necessary.
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