| Message ID | 1409585324-3678-8-git-send-email-lorenzo.pieralisi@arm.com (mailing list archive) |
|---|---|
| State | Superseded, archived |
| Headers | show |
On 09/01/2014 05:28 PM, Lorenzo Pieralisi wrote: > With the introduction of DT based idle states, CPUidle drivers for ARM > can now initialize idle states data through properties in the device tree. > > This patch adds code to the big.LITTLE CPUidle driver to dynamically > initialize idle states data through the updated device tree source file. > > Cc: Chander Kashyap <k.chander@samsung.com> > Acked-by: Catalin Marinas <catalin.marinas@arm.com> > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org> > --- > arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts | 23 +++++++++++++++++++++++ > drivers/cpuidle/Kconfig.arm | 1 + > drivers/cpuidle/cpuidle-big_little.c | 19 +++++++++++++++++++ > 3 files changed, 43 insertions(+) > > diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts > index a25c262..322fd15 100644 > --- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts > +++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts > @@ -38,6 +38,7 @@ > compatible = "arm,cortex-a15"; > reg = <0>; > cci-control-port = <&cci_control1>; > + cpu-idle-states = <&CLUSTER_SLEEP_BIG>; > }; > > cpu1: cpu@1 { > @@ -45,6 +46,7 @@ > compatible = "arm,cortex-a15"; > reg = <1>; > cci-control-port = <&cci_control1>; > + cpu-idle-states = <&CLUSTER_SLEEP_BIG>; > }; > > cpu2: cpu@2 { > @@ -52,6 +54,7 @@ > compatible = "arm,cortex-a7"; > reg = <0x100>; > cci-control-port = <&cci_control2>; > + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; > }; > > cpu3: cpu@3 { > @@ -59,6 +62,7 @@ > compatible = "arm,cortex-a7"; > reg = <0x101>; > cci-control-port = <&cci_control2>; > + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; > }; > > cpu4: cpu@4 { > @@ -66,6 +70,25 @@ > compatible = "arm,cortex-a7"; > reg = <0x102>; > cci-control-port = <&cci_control2>; > + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; > + }; > + > + idle-states { > + CLUSTER_SLEEP_BIG: cluster-sleep-big { > + compatible = "arm,idle-state"; > + local-timer-stop; > + entry-latency-us = <1000>; > + exit-latency-us = <700>; > + min-residency-us = <2000>; > + }; > + > + CLUSTER_SLEEP_LITTLE: cluster-sleep-little { > + compatible = "arm,idle-state"; > + local-timer-stop; > + entry-latency-us = <1000>; > + exit-latency-us = <500>; > + min-residency-us = <2500>; > + }; > }; > }; > > diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm > index 38cff69..e339c7f 100644 > --- a/drivers/cpuidle/Kconfig.arm > +++ b/drivers/cpuidle/Kconfig.arm > @@ -7,6 +7,7 @@ config ARM_BIG_LITTLE_CPUIDLE > depends on MCPM > select ARM_CPU_SUSPEND > select CPU_IDLE_MULTIPLE_DRIVERS > + select DT_IDLE_STATES > help > Select this option to enable CPU idle driver for big.LITTLE based > ARM systems. Driver manages CPUs coordination through MCPM and > diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c > index ef94c3b..85d09bc 100644 > --- a/drivers/cpuidle/cpuidle-big_little.c > +++ b/drivers/cpuidle/cpuidle-big_little.c > @@ -24,6 +24,8 @@ > #include <asm/smp_plat.h> > #include <asm/suspend.h> > > +#include "dt_idle_states.h" > + > static int bl_enter_powerdown(struct cpuidle_device *dev, > struct cpuidle_driver *drv, int idx); > > @@ -73,6 +75,12 @@ static struct cpuidle_driver bl_idle_little_driver = { > .state_count = 2, > }; > > +static const struct of_device_id bl_idle_state_match[] __initconst = { > + { .compatible = "arm,idle-state", > + .data = bl_enter_powerdown }, > + { }, > +}; > + > static struct cpuidle_driver bl_idle_big_driver = { > .name = "big_idle", > .owner = THIS_MODULE, > @@ -190,6 +198,17 @@ static int __init bl_idle_init(void) > if (ret) > goto out_uninit_little; > > + /* Start at index 1, index 0 standard WFI */ > + ret = dt_init_idle_driver(&bl_idle_big_driver, bl_idle_state_match, 1); > + if (ret < 0) > + goto out_uninit_big; > + > + /* Start at index 1, index 0 standard WFI */ > + ret = dt_init_idle_driver(&bl_idle_little_driver, > + bl_idle_state_match, 1); > + if (ret < 0) > + goto out_uninit_big; > + > ret = cpuidle_register(&bl_idle_little_driver, NULL); > if (ret) > goto out_uninit_big; >
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts index a25c262..322fd15 100644 --- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts +++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts @@ -38,6 +38,7 @@ compatible = "arm,cortex-a15"; reg = <0>; cci-control-port = <&cci_control1>; + cpu-idle-states = <&CLUSTER_SLEEP_BIG>; }; cpu1: cpu@1 { @@ -45,6 +46,7 @@ compatible = "arm,cortex-a15"; reg = <1>; cci-control-port = <&cci_control1>; + cpu-idle-states = <&CLUSTER_SLEEP_BIG>; }; cpu2: cpu@2 { @@ -52,6 +54,7 @@ compatible = "arm,cortex-a7"; reg = <0x100>; cci-control-port = <&cci_control2>; + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; }; cpu3: cpu@3 { @@ -59,6 +62,7 @@ compatible = "arm,cortex-a7"; reg = <0x101>; cci-control-port = <&cci_control2>; + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; }; cpu4: cpu@4 { @@ -66,6 +70,25 @@ compatible = "arm,cortex-a7"; reg = <0x102>; cci-control-port = <&cci_control2>; + cpu-idle-states = <&CLUSTER_SLEEP_LITTLE>; + }; + + idle-states { + CLUSTER_SLEEP_BIG: cluster-sleep-big { + compatible = "arm,idle-state"; + local-timer-stop; + entry-latency-us = <1000>; + exit-latency-us = <700>; + min-residency-us = <2000>; + }; + + CLUSTER_SLEEP_LITTLE: cluster-sleep-little { + compatible = "arm,idle-state"; + local-timer-stop; + entry-latency-us = <1000>; + exit-latency-us = <500>; + min-residency-us = <2500>; + }; }; }; diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 38cff69..e339c7f 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -7,6 +7,7 @@ config ARM_BIG_LITTLE_CPUIDLE depends on MCPM select ARM_CPU_SUSPEND select CPU_IDLE_MULTIPLE_DRIVERS + select DT_IDLE_STATES help Select this option to enable CPU idle driver for big.LITTLE based ARM systems. Driver manages CPUs coordination through MCPM and diff --git a/drivers/cpuidle/cpuidle-big_little.c b/drivers/cpuidle/cpuidle-big_little.c index ef94c3b..85d09bc 100644 --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -24,6 +24,8 @@ #include <asm/smp_plat.h> #include <asm/suspend.h> +#include "dt_idle_states.h" + static int bl_enter_powerdown(struct cpuidle_device *dev, struct cpuidle_driver *drv, int idx); @@ -73,6 +75,12 @@ static struct cpuidle_driver bl_idle_little_driver = { .state_count = 2, }; +static const struct of_device_id bl_idle_state_match[] __initconst = { + { .compatible = "arm,idle-state", + .data = bl_enter_powerdown }, + { }, +}; + static struct cpuidle_driver bl_idle_big_driver = { .name = "big_idle", .owner = THIS_MODULE, @@ -190,6 +198,17 @@ static int __init bl_idle_init(void) if (ret) goto out_uninit_little; + /* Start at index 1, index 0 standard WFI */ + ret = dt_init_idle_driver(&bl_idle_big_driver, bl_idle_state_match, 1); + if (ret < 0) + goto out_uninit_big; + + /* Start at index 1, index 0 standard WFI */ + ret = dt_init_idle_driver(&bl_idle_little_driver, + bl_idle_state_match, 1); + if (ret < 0) + goto out_uninit_big; + ret = cpuidle_register(&bl_idle_little_driver, NULL); if (ret) goto out_uninit_big;