Re: [PATCH] spi: pl022: Add clk_{un}prepare() support in runtime PM

[viresh kumar]

On Mon, Sep 17, 2012 at 7:09 PM, Linus Walleij <linus.walleij@xxxxxxxxxx> wrote:
> This driver does clk_prepare/unprepare at probe
> and removed, so I guess what you're trying to say is that
> on your platform the clk_unprepare() process context call
> is needed to save power?
>
> Please elaborate...

Hi Linus,

Yes, we don't need to call prepare() again atleast for SPEAr. You are correct.
I saw the driver after a long time :)
Can you please elaborate, why can't i see any clk_disable/enable calls anywhere
else from probe. If i remember correctly, earlier we used to enable/disable
clk after transfers and also during suspend/resume.

The amba layer is taking care of interface clock only and not
functional clock. So
i believe that's not the magic code. :)

--
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/