Re: [PATCH 3/3] spi: rspi: Add runtime PM support, using spi core auto_runtime_pm
On Tue, Mar 11, 2014 at 02:35:15PM +0100, Geert Uytterhoeven wrote: > On Tue, Mar 11, 2014 at 2:26 PM, Mark Brown wrote: > > On Tue, Mar 11, 2014 at 02:10:31PM +0100, Geert Uytterhoeven wrote: > >> Can you please elaborate what should be fixed? > >> If I disable CONFIG_PM_RUNTIME, the kernel prints: > >> Runtime PM disabled, clock forced on. > >> and the clock is enabled all the time (verified by looking at the clock > >> registers)? > > That's very SH specific and doesn't apply in the general case (I would > > not be surprised if future SH updates broke it...). > Note that this is from drivers/base/power/clock_ops.c > So what should I do instead? Oh, is this manipulating the clock managed by the power domains? If that's the case don't worry about it, it's fine. I'd thought it was another clock. signature.asc Description: Digital signature
Re: [PATCH 3/3] spi: rspi: Add runtime PM support, using spi core auto_runtime_pm
Hi Mark,
On Tue, Mar 11, 2014 at 2:26 PM, Mark Brown wrote:
> On Tue, Mar 11, 2014 at 02:10:31PM +0100, Geert Uytterhoeven wrote:
>
>> Can you please elaborate what should be fixed?
>
>> If I disable CONFIG_PM_RUNTIME, the kernel prints:
>
>> Runtime PM disabled, clock forced on.
>
>> and the clock is enabled all the time (verified by looking at the clock
>> registers)?
>
> That's very SH specific and doesn't apply in the general case (I would
> not be surprised if future SH updates broke it...).
Note that this is from drivers/base/power/clock_ops.c
So what should I do instead?
Thanks!
Gr{oetje,eeting}s,
Geert
--
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Re: [PATCH 3/3] spi: rspi: Add runtime PM support, using spi core auto_runtime_pm
On Tue, Mar 11, 2014 at 02:10:31PM +0100, Geert Uytterhoeven wrote: > Can you please elaborate what should be fixed? > If I disable CONFIG_PM_RUNTIME, the kernel prints: > Runtime PM disabled, clock forced on. > and the clock is enabled all the time (verified by looking at the clock > registers)? That's very SH specific and doesn't apply in the general case (I would not be surprised if future SH updates broke it...). signature.asc Description: Digital signature
Re: [PATCH 3/3] spi: rspi: Add runtime PM support, using spi core auto_runtime_pm
Hi Mark,
On Tue, Mar 11, 2014 at 11:47 AM, Mark Brown wrote:
> On Tue, Mar 11, 2014 at 10:59:12AM +0100, Geert Uytterhoeven wrote:
>> From: Geert Uytterhoeven
>
> Applied, thanks, though...
>
>> - ret = clk_prepare_enable(rspi->clk);
>> - if (ret < 0) {
>> - dev_err(&pdev->dev, "unable to prepare/enable clock\n");
>> - goto error1;
>> - }
>> + pm_runtime_enable(&pdev->dev);
>
> ...due to the runtime PM API being configurable you're supposed to start
> off with the device runtime enabled (this applies to some of the other
> patches too). I'm not sure that's terribly realistic for these drivers
> though.
Can you please elaborate what should be fixed?
If I disable CONFIG_PM_RUNTIME, the kernel prints:
Runtime PM disabled, clock forced on.
and the clock is enabled all the time (verified by looking at the clock
registers)?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Re: [PATCH 3/3] spi: rspi: Add runtime PM support, using spi core auto_runtime_pm
On Tue, Mar 11, 2014 at 10:59:12AM +0100, Geert Uytterhoeven wrote:
> From: Geert Uytterhoeven
Applied, thanks, though...
> - ret = clk_prepare_enable(rspi->clk);
> - if (ret < 0) {
> - dev_err(&pdev->dev, "unable to prepare/enable clock\n");
> - goto error1;
> - }
> + pm_runtime_enable(&pdev->dev);
...due to the runtime PM API being configurable you're supposed to start
off with the device runtime enabled (this applies to some of the other
patches too). I'm not sure that's terribly realistic for these drivers
though.
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