Re: [PATCH 2/2] pwm: lpss: Check PWM powerstate after resume on Cherry Trail devices

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Hi,

On 06-10-18 16:16, Andy Shevchenko wrote:
On Sat, Oct 06, 2018 at 10:55:41AM +0200, Hans de Goede wrote:
On 03-10-18 11:22, Rafael J. Wysocki wrote:
On Monday, September 24, 2018 11:40:14 AM CEST Hans de Goede wrote:

Also, why don't you use acpi_device_get_power() instead of evaluating
_PSC directly?  It should make no difference if there are no power
resources, should it?

2) acpi_device_get_power() is not exported to modules

Do we have any side effects if we just export it?
I would think exporting is better than open coding.

acpi_device_get_power() does a lot more then just call the _PSC
method, while as explained we really just want the _PSC method
as that checks the actual D3 bit which we are interested in.

But as Rafael mentioned if the DSDT does not define power-resources
(which in the 3 DSDTs I just checked it doesn't for the PWM node) then
acpi_device_get_power() is equivalent.

So I guess I could change this, but I would prefer to stick with
the direct _PSC call.

Regards,

Hans



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