On Wed, Sep 03, 2014 at 02:32:14PM +0100, Daniel Lezcano wrote: > 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 Exynos CPUidle driver to dynamically > > initialize idle states data through the updated device tree source > > files. > > > > Cc: Chander Kashyap <k.chander@xxxxxxxxxxx> > > Cc: Kukjin Kim <kgene.kim@xxxxxxxxxxx> > > Cc: Tomasz Figa <t.figa@xxxxxxxxxxx> > > Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> > > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx> > > Acked-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx> Thanks Daniel ! This patch has a dependency: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/274179.html Bartolomiej do you plan to merge the patch above ? This patch needs also testing, I do not have Exynos boards so I only compile tested it. Lorenzo > > > --- > > arch/arm/boot/dts/exynos4210.dtsi | 11 +++++++++++ > > arch/arm/boot/dts/exynos5250.dtsi | 11 +++++++++++ > > drivers/cpuidle/Kconfig.arm | 1 + > > drivers/cpuidle/cpuidle-exynos.c | 18 +++++++++++++++++- > > 4 files changed, 40 insertions(+), 1 deletion(-) > > > > diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi > > index eab7c7b..69fd1a0 100644 > > --- a/arch/arm/boot/dts/exynos4210.dtsi > > +++ b/arch/arm/boot/dts/exynos4210.dtsi > > @@ -48,12 +48,23 @@ > > device_type = "cpu"; > > compatible = "arm,cortex-a9"; > > reg = <0x900>; > > + cpu-idle-states = <&CLUSTER_SLEEP_0>; > > }; > > > > cpu@901 { > > device_type = "cpu"; > > compatible = "arm,cortex-a9"; > > reg = <0x901>; > > + cpu-idle-states = <&CLUSTER_SLEEP_0>; > > + }; > > + > > + idle-states { > > + CLUSTER_SLEEP_0: cluster-sleep-0 { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <300>; > > + min-residency-us = <100000>; > > + }; > > }; > > }; > > > > diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi > > index 492e1ef..3a758ff 100644 > > --- a/arch/arm/boot/dts/exynos5250.dtsi > > +++ b/arch/arm/boot/dts/exynos5250.dtsi > > @@ -63,12 +63,23 @@ > > compatible = "arm,cortex-a15"; > > reg = <0>; > > clock-frequency = <1700000000>; > > + cpu-idle-states = <&CLUSTER_SLEEP_0>; > > }; > > cpu@1 { > > device_type = "cpu"; > > compatible = "arm,cortex-a15"; > > reg = <1>; > > clock-frequency = <1700000000>; > > + cpu-idle-states = <&CLUSTER_SLEEP_0>; > > + }; > > + > > + idle-states { > > + CLUSTER_SLEEP_0: cluster-sleep-0 { > > + compatible = "arm,idle-state"; > > + entry-latency-us = <1000>; > > + exit-latency-us = <300>; > > + min-residency-us = <100000>; > > + }; > > }; > > }; > > > > diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm > > index e339c7f..04cc229 100644 > > --- a/drivers/cpuidle/Kconfig.arm > > +++ b/drivers/cpuidle/Kconfig.arm > > @@ -55,6 +55,7 @@ config ARM_AT91_CPUIDLE > > config ARM_EXYNOS_CPUIDLE > > bool "Cpu Idle Driver for the Exynos processors" > > depends on ARCH_EXYNOS > > + select DT_IDLE_STATES > > help > > Select this to enable cpuidle for Exynos processors > > > > diff --git a/drivers/cpuidle/cpuidle-exynos.c b/drivers/cpuidle/cpuidle-exynos.c > > index ba9b34b..e66a426 100644 > > --- a/drivers/cpuidle/cpuidle-exynos.c > > +++ b/drivers/cpuidle/cpuidle-exynos.c > > @@ -18,6 +18,8 @@ > > #include <asm/suspend.h> > > #include <asm/cpuidle.h> > > > > +#include "dt_idle_states.h" > > + > > static void (*exynos_enter_aftr)(void); > > > > static int exynos_enter_lowpower(struct cpuidle_device *dev, > > @@ -56,13 +58,27 @@ static struct cpuidle_driver exynos_idle_driver = { > > .safe_state_index = 0, > > }; > > > > +static const struct of_device_id exynos_idle_state_match[] __initconst = { > > + { .compatible = "arm,idle-state", > > + .data = exynos_enter_lowpower }, > > + { }, > > +}; > > + > > static int exynos_cpuidle_probe(struct platform_device *pdev) > > { > > int ret; > > + struct cpuidle_driver *drv = &exynos_idle_driver; > > > > exynos_enter_aftr = (void *)(pdev->dev.platform_data); > > > > - ret = cpuidle_register(&exynos_idle_driver, NULL); > > + /* Start at index 1, index 0 standard WFI */ > > + ret = dt_init_idle_driver(drv, exynos_idle_state_match, 1); > > + if (ret < 0) { > > + dev_err(&pdev->dev, "failed to initialize idle states\n"); > > + return ret; > > + } > > + > > + ret = cpuidle_register(drv, NULL); > > if (ret) { > > dev_err(&pdev->dev, "failed to register cpuidle driver\n"); > > return ret; > > > > > -- > <http://www.linaro.org/> Linaro.org | Open source software for ARM SoCs > > Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook | > <http://twitter.com/#!/linaroorg> Twitter | > <http://www.linaro.org/linaro-blog/> Blog > > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
