Messages in this thread |  | | From | Grygorii Strashko <> | Subject | [RFC PATCH 0/4] ARM: keystone: pm: switch to use generic pm domains | Date | Thu, 25 Sep 2014 18:05:33 +0300 |
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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
-- 1.9.1
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