From df67a2b72eb6fa205c0954e3f4f416e282e7412b Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Tue, 17 Mar 2015 16:25:12 +0100 Subject: ARM: shmobile: cpuidle: Remove the pointless default driver The default idle driver uses one state with the WFI instruction. The default idle routine invokes WFI when no cpuidle driver is present. The default cpuidle driver is pointless and does not give more than the default idle routine and moreover it pulls all the mathematics tied with the cpuidle governor for nothing, hence consuming more energy. Remove the default driver, the related code and register the driver directly. [compiled only - no board - no test] Signed-off-by: Daniel Lezcano Signed-off-by: Simon Horman --- arch/arm/mach-shmobile/Makefile | 1 - arch/arm/mach-shmobile/common.h | 9 --------- arch/arm/mach-shmobile/cpuidle.c | 37 ------------------------------------- arch/arm/mach-shmobile/pm-sh7372.c | 2 +- 4 files changed, 1 insertion(+), 48 deletions(-) delete mode 100644 arch/arm/mach-shmobile/cpuidle.c diff --git a/arch/arm/mach-shmobile/Makefile b/arch/arm/mach-shmobile/Makefile index d53996e..c604296 100644 --- a/arch/arm/mach-shmobile/Makefile +++ b/arch/arm/mach-shmobile/Makefile @@ -46,7 +46,6 @@ smp-$(CONFIG_ARCH_EMEV2) += smp-emev2.o headsmp-scu.o platsmp-scu.o # PM objects obj-$(CONFIG_SUSPEND) += suspend.o -obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_CPU_FREQ) += cpufreq.o obj-$(CONFIG_PM_RCAR) += pm-rcar.o obj-$(CONFIG_PM_RMOBILE) += pm-rmobile.o diff --git a/arch/arm/mach-shmobile/common.h b/arch/arm/mach-shmobile/common.h index 309025e..1dc0971 100644 --- a/arch/arm/mach-shmobile/common.h +++ b/arch/arm/mach-shmobile/common.h @@ -23,8 +23,6 @@ struct clk; extern int shmobile_clk_init(void); extern void shmobile_handle_irq_intc(struct pt_regs *); extern struct platform_suspend_ops shmobile_suspend_ops; -struct cpuidle_driver; -extern void shmobile_cpuidle_set_driver(struct cpuidle_driver *drv); #ifdef CONFIG_SUSPEND int shmobile_suspend_init(void); @@ -34,12 +32,6 @@ static inline int shmobile_suspend_init(void) { return 0; } static inline void shmobile_smp_apmu_suspend_init(void) { } #endif -#ifdef CONFIG_CPU_IDLE -int shmobile_cpuidle_init(void); -#else -static inline int shmobile_cpuidle_init(void) { return 0; } -#endif - #ifdef CONFIG_CPU_FREQ int shmobile_cpufreq_init(void); #else @@ -51,7 +43,6 @@ extern void __iomem *shmobile_scu_base; static inline void __init shmobile_init_late(void) { shmobile_suspend_init(); - shmobile_cpuidle_init(); shmobile_cpufreq_init(); } diff --git a/arch/arm/mach-shmobile/cpuidle.c b/arch/arm/mach-shmobile/cpuidle.c deleted file mode 100644 index 0afeb5c..0000000 --- a/arch/arm/mach-shmobile/cpuidle.c +++ /dev/null @@ -1,37 +0,0 @@ -/* - * CPUIdle support code for SH-Mobile ARM - * - * Copyright (C) 2011 Magnus Damm - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ - -#include -#include -#include -#include -#include -#include -#include - -static struct cpuidle_driver shmobile_cpuidle_default_driver = { - .name = "shmobile_cpuidle", - .owner = THIS_MODULE, - .states[0] = ARM_CPUIDLE_WFI_STATE, - .safe_state_index = 0, /* C1 */ - .state_count = 1, -}; - -static struct cpuidle_driver *cpuidle_drv = &shmobile_cpuidle_default_driver; - -void __init shmobile_cpuidle_set_driver(struct cpuidle_driver *drv) -{ - cpuidle_drv = drv; -} - -int __init shmobile_cpuidle_init(void) -{ - return cpuidle_register(cpuidle_drv, NULL); -} diff --git a/arch/arm/mach-shmobile/pm-sh7372.c b/arch/arm/mach-shmobile/pm-sh7372.c index c0293ae..9f19052 100644 --- a/arch/arm/mach-shmobile/pm-sh7372.c +++ b/arch/arm/mach-shmobile/pm-sh7372.c @@ -462,7 +462,7 @@ static struct cpuidle_driver sh7372_cpuidle_driver = { static void __init sh7372_cpuidle_init(void) { - shmobile_cpuidle_set_driver(&sh7372_cpuidle_driver); + return cpuidle_register(cpuidle_drv, NULL); } #else static void __init sh7372_cpuidle_init(void) {} -- cgit v1.1