Re: [RFC PATCH v2 1/2] amba: Allow AMBA drivers to use their own runtime PM

2014-09-15 Thread Krzysztof Kozlowski
On pią, 2014-09-12 at 16:13 +0100, Russell King - ARM Linux wrote: > On Fri, Sep 12, 2014 at 04:56:18PM +0200, Krzysztof Kozlowski wrote: > > The AMBA bus driver defines runtime Power Management functions which > > disable and unprepare AMBA bus clock. This is problematic for runtime PM > > because

Re: [RFC PATCH v2 1/2] amba: Allow AMBA drivers to use their own runtime PM

2014-09-12 Thread Russell King - ARM Linux
On Fri, Sep 12, 2014 at 04:56:18PM +0200, Krzysztof Kozlowski wrote: > The AMBA bus driver defines runtime Power Management functions which > disable and unprepare AMBA bus clock. This is problematic for runtime PM > because unpreparing a clock might sleep so it is not interrupt safe. > > However

[RFC PATCH v2 1/2] amba: Allow AMBA drivers to use their own runtime PM

2014-09-12 Thread Krzysztof Kozlowski
The AMBA bus driver defines runtime Power Management functions which disable and unprepare AMBA bus clock. This is problematic for runtime PM because unpreparing a clock might sleep so it is not interrupt safe. However some drivers may want to implement runtime PM functions in interrupt-safe way (