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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