linux/drivers/cpuidle
Lorenzo Pieralisi af3cfdbf56 arm64: kernel: remove ARM64_CPU_SUSPEND config option
ARM64_CPU_SUSPEND config option was introduced to make code providing
context save/restore selectable only on platforms requiring power
management capabilities.

Currently ARM64_CPU_SUSPEND depends on the PM_SLEEP config option which
in turn is set by the SUSPEND config option.

The introduction of CPU_IDLE for arm64 requires that code configured
by ARM64_CPU_SUSPEND (context save/restore) should be compiled in
in order to enable the CPU idle driver to rely on CPU operations
carrying out context save/restore.

The ARM64_CPUIDLE config option (ARM64 generic idle driver) is therefore
forced to select ARM64_CPU_SUSPEND, even if there may be (ie PM_SLEEP)
failed dependencies, which is not a clean way of handling the kernel
configuration option.

For these reasons, this patch removes the ARM64_CPU_SUSPEND config option
and makes the context save/restore dependent on CPU_PM, which is selected
whenever either SUSPEND or CPU_IDLE are configured, cleaning up dependencies
in the process.

This way, code previously configured through ARM64_CPU_SUSPEND is
compiled in whenever a power management subsystem requires it to be
present in the kernel (SUSPEND || CPU_IDLE), which is the behaviour
expected on ARM64 kernels.

The cpu_suspend and cpu_init_idle CPU operations are added only if
CPU_IDLE is selected, since they are CPU_IDLE specific methods and
should be grouped and defined accordingly.

PSCI CPU operations are updated to reflect the introduced changes.

Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2015-01-27 11:35:33 +00:00
..
governors cpuidle: ladder: Better idle duration measurement without using CPUIDLE_FLAG_TIME_INVALID 2014-12-17 02:26:28 +01:00
coupled.c arch: Mass conversion of smp_mb__*() 2014-04-18 14:20:48 +02:00
cpuidle-arm64.c arm64: kernel: remove ARM64_CPU_SUSPEND config option 2015-01-27 11:35:33 +00:00
cpuidle-at91.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-big_little.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
cpuidle-calxeda.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-clps711x.c cpuidle: drop owner assignment from platform_drivers 2014-10-20 16:20:24 +02:00
cpuidle-cps.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
cpuidle-exynos.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-kirkwood.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-mvebu-v7.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-powernv.c powerpc updates for 3.19 batch 2 2014-12-19 12:57:45 -08:00
cpuidle-pseries.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
cpuidle-ux500.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle-zynq.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
cpuidle.c sched: Let the scheduler see CPU idle states 2014-09-24 14:46:58 +02:00
cpuidle.h cpuidle: support multiple drivers 2012-11-15 00:34:23 +01:00
driver.c cpuidle: Invert CPUIDLE_FLAG_TIME_VALID logic 2014-11-12 21:17:27 +01:00
dt_idle_states.c Merge back earlier cpuidle material for 3.19-rc1. 2014-11-21 16:31:42 +01:00
dt_idle_states.h drivers: cpuidle: implement DT based idle states infrastructure 2014-09-25 10:52:20 +02:00
governor.c cpuidle: Replace strnicmp with strncasecmp 2014-09-25 01:17:10 +02:00
Kconfig drivers: cpuidle: CPU idle ARM64 driver 2014-09-25 10:52:21 +02:00
Kconfig.arm ACPI and power management updates for 3.18-rc1 2014-10-09 16:07:43 -04:00
Kconfig.arm64 arm64: kernel: remove ARM64_CPU_SUSPEND config option 2015-01-27 11:35:33 +00:00
Kconfig.mips MIPS: Kconfig: Add missing MIPS_CPS dependencies to PM and cpuidle 2014-10-23 19:58:05 +02:00
Kconfig.powerpc powerpc/powernv/cpuidle: Back-end cpuidle driver for powernv platform. 2014-01-29 17:02:24 +11:00
Makefile drivers: cpuidle: CPU idle ARM64 driver 2014-09-25 10:52:21 +02:00
sysfs.c cpuidle: fix permission for driver name sysfs node 2014-07-19 21:43:28 +02:00