[PATCH v4] i2c: enable runtime PM for I2C adapter devices enumerated from ACPI

[Mark Brown]

On Sat, Oct 05, 2013 at 11:09:01AM +0300, Mika Westerberg wrote:

> It looks like Windows actually powers the I2C controller off independently
> of the I2C client power state. We should probably do the same in Linux even
> though it is not following what the ACPI spec says (but makes sense with
> serial buses like I2C and SPI).

Sounds like it's probably worth going to the effort of getting the spec
amended...
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