[RFC PATCH 0/4] ARM: keystone: pm: switch to use generic pm domains

[Grygorii Strashko <grygorii.strashko@ti.com>]

Hi Santosh, Kevin,

This serie is just another try to enable Runtime PM for Keystone 2.
It switches Keystone 2 PM code to use Generic PM domains
instead of PM  clock domains because of the lack of DT support
for the last.


Keystone 2 PM domain should be specified per device for which
Runtime PM has to be enabled and handles the list of functional clocks
to enable/disable device.

Example:
 qmss_domain: qmss_pm_controller {
	compatible = "ti,keystone-pm-controller";
	clocks = <&chipclk13>;
	#power-domain-cells = <0>;
 };

 qmss: qmss@2a40000 {
	compatible = "ti,keystone-navigator-qmss";
	...
	power-domains = <&qmss_domain>;

Thanks for your comments!

PS: patch 1 was reused from [1].
Patch 4 is added to illustrate Keystone 2 PM doamins configuration in DT.

Based on:
- "[PATCH v5 00/11] PM / Domains: Generic OF-based support"
  http://www.spinics.net/lists/devicetree/msg49962.html

Links on related discussion:
[1] "[PATCH/RFC 0/4] of: Register clocks for Runtime PM with PM core"
  https://lkml.org/lkml/2014/4/24/1118

[2] "[RFC PATCH 0/2] use named clocks list to register clocks for PM clock domain"
  https://lkml.org/lkml/2014/6/12/436

[3] "[RFC PATCH 0/3] PM / clock_ops: allow to specify custom pm_clk_notifier callback"
  https://lkml.org/lkml/2014/7/25/630


Geert Uytterhoeven (1):
  PM / clock_ops: Add pm_clk_add_clk()

Grygorii Strashko (3):
  ARM: keystone: pm: switch to use generic pm domains
  ARM: keystone: pm: remove unused clk pm domain code
  ARM: dts: k2hk-evm: add pm domains for net, qmss and knav_dmas

 .../devicetree/bindings/power/ti,keystone-gpc.txt  |  37 ++++++
 arch/arm/boot/dts/k2hk-evm.dts                     |  31 +++++
 arch/arm/mach-keystone/Kconfig                     |   1 +
 arch/arm/mach-keystone/pm_domain.c                 | 136 +++++++++++++++------
 drivers/base/power/clock_ops.c                     |  41 +++++--
 include/linux/pm_clock.h                           |   8 ++
 6 files changed, 206 insertions(+), 48 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/power/ti,keystone-gpc.txt

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1.9.1