From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lorenzo Pieralisi Subject: [PATCH v7 7/8] drivers: cpuidle: initialize big.LITTLE driver through DT Date: Wed, 13 Aug 2014 16:52:06 +0100 Message-ID: <1407945127-27554-8-git-send-email-lorenzo.pieralisi@arm.com> References: <1407945127-27554-1-git-send-email-lorenzo.pieralisi@arm.com> Content-Type: text/plain; charset=WINDOWS-1252 Content-Transfer-Encoding: quoted-printable Return-path: Received: from service87.mimecast.com ([91.220.42.44]:38783 "EHLO service87.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753422AbaHMPwf (ORCPT ); Wed, 13 Aug 2014 11:52:35 -0400 In-Reply-To: <1407945127-27554-1-git-send-email-lorenzo.pieralisi@arm.com> Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org Cc: devicetree@vger.kernel.org, Lorenzo Pieralisi , Chander Kashyap , Mark Rutland , Sudeep Holla , Catalin Marinas , Charles Garcia Tobin , Nicolas Pitre , Rob Herring , Grant Likely , Peter De Schrijver , Santosh Shilimkar , Daniel Lezcano , Amit Kucheria , Vincent Guittot , Antti Miettinen , Stephen Boyd , Kevin Hilman , Sebastian Capella , Tomasz Figa , Mark Brown , Paul Walmsley , Geoff 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 Signed-off-by: Lorenzo Pieralisi --- arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts | 23 +++++++++++++++++++++++ drivers/cpuidle/Kconfig.arm | 1 + drivers/cpuidle/cpuidle-big_little.c | 23 ++++++++++++++++++++++- 3 files changed, 46 insertions(+), 1 deletion(-) 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 @@ =09=09=09compatible =3D "arm,cortex-a15"; =09=09=09reg =3D <0>; =09=09=09cci-control-port =3D <&cci_control1>; +=09=09=09cpu-idle-states =3D <&CLUSTER_SLEEP_BIG>; =09=09}; =20 =09=09cpu1: cpu@1 { @@ -45,6 +46,7 @@ =09=09=09compatible =3D "arm,cortex-a15"; =09=09=09reg =3D <1>; =09=09=09cci-control-port =3D <&cci_control1>; +=09=09=09cpu-idle-states =3D <&CLUSTER_SLEEP_BIG>; =09=09}; =20 =09=09cpu2: cpu@2 { @@ -52,6 +54,7 @@ =09=09=09compatible =3D "arm,cortex-a7"; =09=09=09reg =3D <0x100>; =09=09=09cci-control-port =3D <&cci_control2>; +=09=09=09cpu-idle-states =3D <&CLUSTER_SLEEP_LITTLE>; =09=09}; =20 =09=09cpu3: cpu@3 { @@ -59,6 +62,7 @@ =09=09=09compatible =3D "arm,cortex-a7"; =09=09=09reg =3D <0x101>; =09=09=09cci-control-port =3D <&cci_control2>; +=09=09=09cpu-idle-states =3D <&CLUSTER_SLEEP_LITTLE>; =09=09}; =20 =09=09cpu4: cpu@4 { @@ -66,6 +70,25 @@ =09=09=09compatible =3D "arm,cortex-a7"; =09=09=09reg =3D <0x102>; =09=09=09cci-control-port =3D <&cci_control2>; +=09=09=09cpu-idle-states =3D <&CLUSTER_SLEEP_LITTLE>; +=09=09}; + +=09=09idle-states { +=09=09=09CLUSTER_SLEEP_BIG: cluster-sleep-big { +=09=09=09=09compatible =3D "arm,idle-state"; +=09=09=09=09local-timer-stop; +=09=09=09=09entry-latency-us =3D <1000>; +=09=09=09=09exit-latency-us =3D <700>; +=09=09=09=09min-residency-us =3D <2000>; +=09=09=09}; + +=09=09=09CLUSTER_SLEEP_LITTLE: cluster-sleep-little { +=09=09=09=09compatible =3D "arm,idle-state"; +=09=09=09=09local-timer-stop; +=09=09=09=09entry-latency-us =3D <1000>; +=09=09=09=09exit-latency-us =3D <500>; +=09=09=09=09min-residency-us =3D <2500>; +=09=09=09}; =09=09}; =09}; =20 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 =09depends on MCPM =09select ARM_CPU_SUSPEND =09select CPU_IDLE_MULTIPLE_DRIVERS +=09select DT_IDLE_STATES =09help =09 Select this option to enable CPU idle driver for big.LITTLE based =09 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 344d79fa..38bdd28 100644 --- a/drivers/cpuidle/cpuidle-big_little.c +++ b/drivers/cpuidle/cpuidle-big_little.c @@ -24,6 +24,8 @@ #include #include =20 +#include "dt_idle_states.h" + static int bl_enter_powerdown(struct cpuidle_device *dev, =09=09=09 struct cpuidle_driver *drv, int idx); =20 @@ -171,7 +173,8 @@ static const struct of_device_id compatible_machine_mat= ch[] =3D { =20 static int __init bl_idle_init(void) { -=09int ret; +=09int ret, i; +=09struct cpuidle_driver *drv; =09struct device_node *root =3D of_find_node_by_path("/"); =20 =09if (!root) @@ -197,6 +200,24 @@ static int __init bl_idle_init(void) =09if (ret) =09=09goto out_uninit_little; =20 +=09/* Start at index 1, index 0 standard WFI */ +=09ret =3D dt_init_idle_driver(&bl_idle_big_driver, 1); +=09if (ret < 0) +=09=09goto out_uninit_big; + +=09/* Start at index 1, index 0 standard WFI */ +=09ret =3D dt_init_idle_driver(&bl_idle_little_driver, 1); +=09if (ret < 0) +=09=09goto out_uninit_big; + +=09drv =3D &bl_idle_big_driver; +=09for (i =3D 1; i < drv->state_count; i++) +=09=09drv->states[i].enter =3D bl_enter_powerdown; + +=09drv =3D &bl_idle_little_driver; +=09for (i =3D 1; i < drv->state_count; i++) +=09=09drv->states[i].enter =3D bl_enter_powerdown; + =09ret =3D cpuidle_register(&bl_idle_little_driver, NULL); =09if (ret) =09=09goto out_uninit_big; --=20 1.9.1