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authorRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-27 01:42:55 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-08-27 01:42:55 +0200
commitc7878810f2d3a637bafc4fd55126eb9a5548ec77 (patch)
treec3945d713e9c75315e856d17bb3bcd3c8e96805f /arch/arm
parent95b6fcb0a3b6d5ce7853ebe088c344fd016351e7 (diff)
parent51f245b895e3fe4cbac0b2633e54a1830864a83f (diff)
Merge branch 'pm-cpuidle'
* pm-cpuidle: (25 commits) cpuidle: Change struct menu_device field types cpuidle: Add a comment warning about possible overflow cpuidle: Fix variable domains in get_typical_interval() cpuidle: Fix menu_device->intervals type cpuidle: CodingStyle: Break up multiple assignments on single line cpuidle: Check called function parameter in get_typical_interval() cpuidle: Rearrange code and comments in get_typical_interval() cpuidle: Ignore interval prediction result when timer is shorter cpuidle-kirkwood.c: simplify use of devm_ioremap_resource() cpuidle: kirkwood: Make kirkwood_cpuidle_remove function static cpuidle: calxeda: Add missing __iomem annotation SH: cpuidle: Add missing parameter for cpuidle_register() ARM: ux500: cpuidle: Move ux500 cpuidle driver to drivers/cpuidle ARM: ux500: cpuidle: Remove pointless include ARM: ux500: cpuidle: Instantiate the driver from platform device ARM: davinci: cpuidle: Fix target residency cpuidle: Add Kconfig.arm and move calxeda, kirkwood and zynq cpuidle: Check if device is already registered cpuidle: Introduce __cpuidle_device_init() cpuidle: Introduce __cpuidle_unregister_device() ...
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/mach-davinci/cpuidle.c2
-rw-r--r--arch/arm/mach-ux500/Makefile1
-rw-r--r--arch/arm/mach-ux500/cpuidle.c128
3 files changed, 1 insertions, 130 deletions
diff --git a/arch/arm/mach-davinci/cpuidle.c b/arch/arm/mach-davinci/cpuidle.c
index 36aef3a7dedb..f1ac1c94ac0f 100644
--- a/arch/arm/mach-davinci/cpuidle.c
+++ b/arch/arm/mach-davinci/cpuidle.c
@@ -65,7 +65,7 @@ static struct cpuidle_driver davinci_idle_driver = {
.states[1] = {
.enter = davinci_enter_idle,
.exit_latency = 10,
- .target_residency = 100000,
+ .target_residency = 10000,
.flags = CPUIDLE_FLAG_TIME_VALID,
.name = "DDR SR",
.desc = "WFI and DDR Self Refresh",
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index bf9b6be5b180..fe1f3e26b88b 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -4,7 +4,6 @@
obj-y := cpu.o devices.o devices-common.o \
id.o usb.o timer.o pm.o
-obj-$(CONFIG_CPU_IDLE) += cpuidle.o
obj-$(CONFIG_CACHE_L2X0) += cache-l2x0.o
obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o
obj-$(CONFIG_MACH_MOP500) += board-mop500.o board-mop500-sdi.o \
diff --git a/arch/arm/mach-ux500/cpuidle.c b/arch/arm/mach-ux500/cpuidle.c
deleted file mode 100644
index a45dd09daed9..000000000000
--- a/arch/arm/mach-ux500/cpuidle.c
+++ /dev/null
@@ -1,128 +0,0 @@
-/*
- * Copyright (c) 2012 Linaro : Daniel Lezcano <daniel.lezcano@linaro.org> (IBM)
- *
- * Based on the work of Rickard Andersson <rickard.andersson@stericsson.com>
- * and Jonas Aaberg <jonas.aberg@stericsson.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/module.h>
-#include <linux/cpuidle.h>
-#include <linux/spinlock.h>
-#include <linux/atomic.h>
-#include <linux/smp.h>
-#include <linux/mfd/dbx500-prcmu.h>
-#include <linux/platform_data/arm-ux500-pm.h>
-
-#include <asm/cpuidle.h>
-#include <asm/proc-fns.h>
-
-#include "db8500-regs.h"
-#include "id.h"
-
-static atomic_t master = ATOMIC_INIT(0);
-static DEFINE_SPINLOCK(master_lock);
-
-static inline int ux500_enter_idle(struct cpuidle_device *dev,
- struct cpuidle_driver *drv, int index)
-{
- int this_cpu = smp_processor_id();
- bool recouple = false;
-
- if (atomic_inc_return(&master) == num_online_cpus()) {
-
- /* With this lock, we prevent the other cpu to exit and enter
- * this function again and become the master */
- if (!spin_trylock(&master_lock))
- goto wfi;
-
- /* decouple the gic from the A9 cores */
- if (prcmu_gic_decouple()) {
- spin_unlock(&master_lock);
- goto out;
- }
-
- /* If an error occur, we will have to recouple the gic
- * manually */
- recouple = true;
-
- /* At this state, as the gic is decoupled, if the other
- * cpu is in WFI, we have the guarantee it won't be wake
- * up, so we can safely go to retention */
- if (!prcmu_is_cpu_in_wfi(this_cpu ? 0 : 1))
- goto out;
-
- /* The prcmu will be in charge of watching the interrupts
- * and wake up the cpus */
- if (prcmu_copy_gic_settings())
- goto out;
-
- /* Check in the meantime an interrupt did
- * not occur on the gic ... */
- if (prcmu_gic_pending_irq())
- goto out;
-
- /* ... and the prcmu */
- if (prcmu_pending_irq())
- goto out;
-
- /* Go to the retention state, the prcmu will wait for the
- * cpu to go WFI and this is what happens after exiting this
- * 'master' critical section */
- if (prcmu_set_power_state(PRCMU_AP_IDLE, true, true))
- goto out;
-
- /* When we switch to retention, the prcmu is in charge
- * of recoupling the gic automatically */
- recouple = false;
-
- spin_unlock(&master_lock);
- }
-wfi:
- cpu_do_idle();
-out:
- atomic_dec(&master);
-
- if (recouple) {
- prcmu_gic_recouple();
- spin_unlock(&master_lock);
- }
-
- return index;
-}
-
-static struct cpuidle_driver ux500_idle_driver = {
- .name = "ux500_idle",
- .owner = THIS_MODULE,
- .states = {
- ARM_CPUIDLE_WFI_STATE,
- {
- .enter = ux500_enter_idle,
- .exit_latency = 70,
- .target_residency = 260,
- .flags = CPUIDLE_FLAG_TIME_VALID |
- CPUIDLE_FLAG_TIMER_STOP,
- .name = "ApIdle",
- .desc = "ARM Retention",
- },
- },
- .safe_state_index = 0,
- .state_count = 2,
-};
-
-int __init ux500_idle_init(void)
-{
- if (!(cpu_is_u8500_family() || cpu_is_ux540_family()))
- return -ENODEV;
-
- /* Configure wake up reasons */
- prcmu_enable_wakeups(PRCMU_WAKEUP(ARM) | PRCMU_WAKEUP(RTC) |
- PRCMU_WAKEUP(ABB));
-
- return cpuidle_register(&ux500_idle_driver, NULL);
-}
-
-device_initcall(ux500_idle_init);