This patch skips the deep C1(AFTR -Arm off top running) state for
exynos5440 SoC as this soc does not support this state. The cpu's
only allows the basic C0 state.
The C1 state is filtered by re-initialising the driver state_count
value to 1.
Suggested-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch enables the selection of samsung pm related stuffs
when SAMSUNG_PM config is enabled and not just when generic PM
config is enabled. Power management for s3c64XX and s3c24XX
is enabled by default and for other platform depends on S5P_PM.
This patch also fixes the following compilation error's when compiling
a platform like exynos5440 which does not select pm stuffs.

arch/arm/mach-exynos/built-in.o: In function '__virt_to_phys':
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
linux/arch/arm/include/asm/memory.h:175: undefined reference to 's3c_cpu_resume'
arch/arm/mach-exynos/built-in.o: In function 'exynos5_init_irq':
linux/arch/arm/mach-exynos/common.c:492: undefined reference to 's3c_irq_wake'
linux/arch/arm/mach-exynos/common.c:492: undefined reference to 's3c_irq_wake'
arch/arm/mach-exynos/built-in.o: In function 'exynos4_init_irq':
linux/arch/arm/mach-exynos/common.c:476: undefined reference to 's3c_irq_wake'
linux/arch/arm/mach-exynos/common.c:476: undefined reference to 's3c_irq_wake'
arch/arm/plat-samsung/built-in.o: In function 's3c_irqext_wake':
linux/arch/arm/plat-samsung/pm.c:144: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:144: undefined reference to 's3c_irqwake_eintallow'
arch/arm/plat-samsung/built-in.o: In function 's3c_pm_enter':
linux/arch/arm/plat-samsung/pm.c:263: undefined reference to 's3c_irqwake_intallow'
linux/arch/arm/plat-samsung/pm.c:263: undefined reference to 's3c_irqwake_intallow'
linux/arch/arm/plat-samsung/pm.c:264: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:264: undefined reference to 's3c_irqwake_eintallow'
linux/arch/arm/plat-samsung/pm.c:275: undefined reference to 's3c_pm_save_core'
linux/arch/arm/plat-samsung/pm.c:279: undefined reference to 's3c_pm_configure_extint'
linux/arch/arm/plat-samsung/pm.c:310: undefined reference to 's3c_pm_restore_core'
make: *** [vmlinux] Error 1
Signed-off-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The en_core_tk_irqen flag is set in all the cpuidle driver which
means it is not necessary to specify this flag.

Remove the flag and the code related to it.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>  # for mach-omap2/*
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>

A trivial patch to replace for_each_cpu(cpu_id, cpu_online_mask) by
the corresponding macro.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The cpuidle_register_driver return value is not checked.
The init function returns always -EIO when cpuidle_register_device
fails but the error could be different.

This patch fixes that by checking the cpuidle_register_driver properly
and returning the correct value when cpuidle_register_device fails.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The states are defined in the driver. We can get rid of the
intermediate cpuidle states initialization and the memcpy by
directly initializing the driver states.
Signed-off-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NAmit Daniel Kachhap <amit.daniel@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Cortex A9 based exynos4 has a memory mapped SCU while the Cortex
A15 based exynos5 does not. Hence, remove the call to scu_enable
for exynos5.
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NInderpal Singh <inderpal.singh@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

In idle state down clocking the arm cores can result in power
savings. Program the power control registers to achieve this and
save these registers across a suspend/resume cycle.
Signed-off-by: NAbhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch adds pmu table setting feature for EXYNOS5250.
Signed-off-by: NJongpill Lee <boyko.lee@samsung.com>
[kgene.kim@samsung.com: re-worked on top of v3.4-rc7]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch enables core cpuidle timekeeping and irq enabling and
remove those redundant parts from the exynos cpuidle drivers
Signed-off-by: NAmit Daniel <amit.kachhap@linaro.org>
Acked-by: NDaniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: NRobert Lee <rob.lee@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch adds support AFTR(ARM OFF TOP RUNNING) mode in
cpuidle driver. L2 cache keeps their data in this mode.
This patch ports the code to the latest interfaces to
save/restore CPU state inclusive of CPU PM notifiers, l2
resume and cpu_suspend/resume.
Signed-off-by: NJaecheol Lee <jc.lee@samsung.com>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: NAmit Daniel Kachhap <amit.kachhap@linaro.org>
[kgene.kim@samsung.com: fixed for non-smp as per Tushar's pointing out]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

  CC      arch/arm/mach-exynos/cpuidle.o
arch/arm/mach-exynos/cpuidle.c:36: error: 'THIS_MODULE' undeclared here (not in a function)
arch/arm/mach-exynos/cpuidle.c: In function 'exynos4_enter_idle':
arch/arm/mach-exynos/cpuidle.c:42: error: storage size of 'before' isn't known
arch/arm/mach-exynos/cpuidle.c:42: error: storage size of 'after' isn't known
arch/arm/mach-exynos/cpuidle.c:46: error: implicit declaration of function 'do_gettimeofday'
arch/arm/mach-exynos/cpuidle.c:52: error: 'USEC_PER_SEC' undeclared (first use in this function)
arch/arm/mach-exynos/cpuidle.c:52: error: (Each undeclared identifier is reported only once
arch/arm/mach-exynos/cpuidle.c:52: error: for each function it appears in.)
arch/arm/mach-exynos/cpuidle.c:42: warning: unused variable 'after'
arch/arm/mach-exynos/cpuidle.c:42: warning: unused variable 'before'
make[1]: *** [arch/arm/mach-exynos/cpuidle.o] Error 1
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
[kgene.kim@samsung.com: Fixed as per Stephen's suggestion]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The arch/arm/mach-exynos4 directory (CONFIG_ARCH_EXYNOS4) has
made for plaforms based on EXYNOS4 SoCs. But since upcoming
Samsung's SoCs such as EXYNOS5 (ARM Cortex A15) can reuse most
codes in current mach-exynos4, one mach-exynos directory will
be used for them.

This patch changes to CONFIG_ARCH_EXYNOS (arch/arm/mach-exynos)
but keeps original CONFIG_ARCH_EXYNOS4 in mach-exynos/Kconfig to
avoid changing in driver side.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch supports cpuidle framework for EXYNOS4210. Currently,
Only one idle state is possible to use, but more idle states can
be added following by this patch.
Signed-off-by: NJaecheol Lee <jc.lee@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>