diff options
Diffstat (limited to 'drivers/cpuidle')
| -rw-r--r-- | drivers/cpuidle/Kconfig.arm | 11 | ||||
| -rw-r--r-- | drivers/cpuidle/Makefile | 2 | ||||
| -rw-r--r-- | drivers/cpuidle/coupled.c | 2 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-armada-370-xp.c | 93 | ||||
| -rw-r--r-- | drivers/cpuidle/cpuidle-exynos.c | 99 |
5 files changed, 206 insertions, 1 deletions
diff --git a/drivers/cpuidle/Kconfig.arm b/drivers/cpuidle/Kconfig.arm index 97ccc31dbdd8..ae1d78ea7df7 100644 --- a/drivers/cpuidle/Kconfig.arm +++ b/drivers/cpuidle/Kconfig.arm @@ -1,6 +1,11 @@ # # ARM CPU Idle drivers # +config ARM_ARMADA_370_XP_CPUIDLE + bool "CPU Idle Driver for Armada 370/XP family processors" + depends on ARCH_MVEBU + help + Select this to enable cpuidle on Armada 370/XP processors. config ARM_BIG_LITTLE_CPUIDLE bool "Support for ARM big.LITTLE processors" @@ -44,3 +49,9 @@ config ARM_AT91_CPUIDLE depends on ARCH_AT91 help Select this to enable cpuidle for AT91 processors + +config ARM_EXYNOS_CPUIDLE + bool "Cpu Idle Driver for the Exynos processors" + depends on ARCH_EXYNOS + help + Select this to enable cpuidle for Exynos processors diff --git a/drivers/cpuidle/Makefile b/drivers/cpuidle/Makefile index f71ae1b373c5..cd3ab59f8461 100644 --- a/drivers/cpuidle/Makefile +++ b/drivers/cpuidle/Makefile @@ -7,12 +7,14 @@ obj-$(CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED) += coupled.o ################################################################################## # ARM SoC drivers +obj-$(CONFIG_ARM_ARMADA_370_XP_CPUIDLE) += cpuidle-armada-370-xp.o obj-$(CONFIG_ARM_BIG_LITTLE_CPUIDLE) += cpuidle-big_little.o obj-$(CONFIG_ARM_HIGHBANK_CPUIDLE) += cpuidle-calxeda.o obj-$(CONFIG_ARM_KIRKWOOD_CPUIDLE) += cpuidle-kirkwood.o obj-$(CONFIG_ARM_ZYNQ_CPUIDLE) += cpuidle-zynq.o obj-$(CONFIG_ARM_U8500_CPUIDLE) += cpuidle-ux500.o obj-$(CONFIG_ARM_AT91_CPUIDLE) += cpuidle-at91.o +obj-$(CONFIG_ARM_EXYNOS_CPUIDLE) += cpuidle-exynos.o ############################################################################### # POWERPC drivers diff --git a/drivers/cpuidle/coupled.c b/drivers/cpuidle/coupled.c index cb6654bfad77..73fe2f8d7f96 100644 --- a/drivers/cpuidle/coupled.c +++ b/drivers/cpuidle/coupled.c @@ -159,7 +159,7 @@ void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev, atomic_t *a) { int n = dev->coupled->online_count; - smp_mb__before_atomic_inc(); + smp_mb__before_atomic(); atomic_inc(a); while (atomic_read(a) < n) diff --git a/drivers/cpuidle/cpuidle-armada-370-xp.c b/drivers/cpuidle/cpuidle-armada-370-xp.c new file mode 100644 index 000000000000..28587d0f3947 --- /dev/null +++ b/drivers/cpuidle/cpuidle-armada-370-xp.c @@ -0,0 +1,93 @@ +/* + * Marvell Armada 370 and Armada XP SoC cpuidle driver + * + * Copyright (C) 2014 Marvell + * + * Nadav Haklai <nadavh@marvell.com> + * Gregory CLEMENT <gregory.clement@free-electrons.com> + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + * + * Maintainer: Gregory CLEMENT <gregory.clement@free-electrons.com> + */ + +#include <linux/cpu_pm.h> +#include <linux/cpuidle.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/suspend.h> +#include <linux/platform_device.h> +#include <asm/cpuidle.h> + +#define ARMADA_370_XP_MAX_STATES 3 +#define ARMADA_370_XP_FLAG_DEEP_IDLE 0x10000 + +static int (*armada_370_xp_cpu_suspend)(int); + +static int armada_370_xp_enter_idle(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int ret; + bool deepidle = false; + cpu_pm_enter(); + + if (drv->states[index].flags & ARMADA_370_XP_FLAG_DEEP_IDLE) + deepidle = true; + + ret = armada_370_xp_cpu_suspend(deepidle); + if (ret) + return ret; + + cpu_pm_exit(); + + return index; +} + +static struct cpuidle_driver armada_370_xp_idle_driver = { + .name = "armada_370_xp_idle", + .states[0] = ARM_CPUIDLE_WFI_STATE, + .states[1] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 10, + .power_usage = 50, + .target_residency = 100, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "MV CPU IDLE", + .desc = "CPU power down", + }, + .states[2] = { + .enter = armada_370_xp_enter_idle, + .exit_latency = 100, + .power_usage = 5, + .target_residency = 1000, + .flags = CPUIDLE_FLAG_TIME_VALID | + ARMADA_370_XP_FLAG_DEEP_IDLE, + .name = "MV CPU DEEP IDLE", + .desc = "CPU and L2 Fabric power down", + }, + .state_count = ARMADA_370_XP_MAX_STATES, +}; + +static int armada_370_xp_cpuidle_probe(struct platform_device *pdev) +{ + + armada_370_xp_cpu_suspend = (void *)(pdev->dev.platform_data); + return cpuidle_register(&armada_370_xp_idle_driver, NULL); +} + +static struct platform_driver armada_370_xp_cpuidle_plat_driver = { + .driver = { + .name = "cpuidle-armada-370-xp", + .owner = THIS_MODULE, + }, + .probe = armada_370_xp_cpuidle_probe, +}; + +module_platform_driver(armada_370_xp_cpuidle_plat_driver); + +MODULE_AUTHOR("Gregory CLEMENT <gregory.clement@free-electrons.com>"); +MODULE_DESCRIPTION("Armada 370/XP cpu idle driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/cpuidle/cpuidle-exynos.c b/drivers/cpuidle/cpuidle-exynos.c new file mode 100644 index 000000000000..7c0151263828 --- /dev/null +++ b/drivers/cpuidle/cpuidle-exynos.c @@ -0,0 +1,99 @@ +/* linux/arch/arm/mach-exynos/cpuidle.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/cpuidle.h> +#include <linux/cpu_pm.h> +#include <linux/export.h> +#include <linux/module.h> +#include <linux/platform_device.h> + +#include <asm/proc-fns.h> +#include <asm/suspend.h> +#include <asm/cpuidle.h> + +static void (*exynos_enter_aftr)(void); + +static int idle_finisher(unsigned long flags) +{ + exynos_enter_aftr(); + cpu_do_idle(); + + return 1; +} + +static int exynos_enter_core0_aftr(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + cpu_pm_enter(); + cpu_suspend(0, idle_finisher); + cpu_pm_exit(); + + return index; +} + +static int exynos_enter_lowpower(struct cpuidle_device *dev, + struct cpuidle_driver *drv, + int index) +{ + int new_index = index; + + /* AFTR can only be entered when cores other than CPU0 are offline */ + if (num_online_cpus() > 1 || dev->cpu != 0) + new_index = drv->safe_state_index; + + if (new_index == 0) + return arm_cpuidle_simple_enter(dev, drv, new_index); + else + return exynos_enter_core0_aftr(dev, drv, new_index); +} + +static struct cpuidle_driver exynos_idle_driver = { + .name = "exynos_idle", + .owner = THIS_MODULE, + .states = { + [0] = ARM_CPUIDLE_WFI_STATE, + [1] = { + .enter = exynos_enter_lowpower, + .exit_latency = 300, + .target_residency = 100000, + .flags = CPUIDLE_FLAG_TIME_VALID, + .name = "C1", + .desc = "ARM power down", + }, + }, + .state_count = 2, + .safe_state_index = 0, +}; + +static int exynos_cpuidle_probe(struct platform_device *pdev) +{ + int ret; + + exynos_enter_aftr = (void *)(pdev->dev.platform_data); + + ret = cpuidle_register(&exynos_idle_driver, NULL); + if (ret) { + dev_err(&pdev->dev, "failed to register cpuidle driver\n"); + return ret; + } + + return 0; +} + +static struct platform_driver exynos_cpuidle_driver = { + .probe = exynos_cpuidle_probe, + .driver = { + .name = "exynos_cpuidle", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(exynos_cpuidle_driver); |