kernel: kconfig: move power management options out

Change-Id: I5d7068ca7a5793bb3499f2bf2dc1abc4e337313e
Signed-off-by: Anas Nashif <anas.nashif@intel.com>

1 files changed, 89 insertions, 0 deletions

diff --git a/kernel/Kconfig.power_mgmt b/kernel/Kconfig.power_mgmt
new file mode 100644
index 000000000..e9e3005e3
--- /dev/null
+++ b/kernel/Kconfig.power_mgmt
@@ -0,0 +1,89 @@
+#
+# Copyright (c) 2014-2015 Wind River Systems, Inc.
+# Copyright (c) 2016 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+menuconfig SYS_POWER_MANAGEMENT
+	bool
+	prompt "Power management"
+	default n
+	help
+	This option enables the board to implement extra power management
+	policies whenever the kernel becomes idle. The kernel informs the
+	power management subsystem of the number of ticks until the next kernel
+	timer is due to expire.
+
+if SYS_POWER_MANAGEMENT
+config SYS_POWER_LOW_POWER_STATE
+	bool
+	prompt "Low power state"
+	default n
+	depends on SYS_POWER_LOW_POWER_STATE_SUPPORTED
+	help
+	This option enables the kernel to interface with a power manager
+	application.  This permits the system to enter a custom CPU low power
+	state when the kernel becomes idle. The low power state could be any of
+	the CPU low power states supported by the processor.  Generally the one
+	saving most power.
+
+config SYS_POWER_DEEP_SLEEP
+	bool
+	prompt "Deep sleep state"
+	default n
+	depends on SYS_POWER_DEEP_SLEEP_SUPPORTED
+	help
+	This option enables the kernel to interface with a power manager
+	application. This permits the system to enter a Deep sleep state
+	supported by the SOC where the system clock is turned off while RAM is
+	retained. This state would be entered when the kernel becomes idle for
+	extended periods and would have a high wake latency.  Resume would be
+	from the reset vector same as cold boot. The interface allows
+	restoration of states that were saved at the time of suspend.
+
+config DEVICE_POWER_MANAGEMENT
+	bool
+	prompt "Device power management"
+	default n
+	help
+	This option enables the device power management interface.  The
+	interface consists of hook functions implemented by device drivers
+	that get called by the power manager application when the system
+	is going to suspend state or resuming from suspend state. This allows
+	device drivers to do any necessary power management operations
+	like turning off device clocks and peripherals. The device drivers
+	may also save and restore states in these hook functions.
+
+config TICKLESS_IDLE
+	bool
+	prompt "Tickless idle"
+	default y if TICKLESS_IDLE_SUPPORTED
+	help
+	This option suppresses periodic system clock interrupts whenever the
+	kernel becomes idle. This permits the system to remain in a power
+	saving state for extended periods without having to wake up to
+	service each tick as it occurs.
+
+config TICKLESS_IDLE_THRESH
+	int
+	prompt "Tickless idle threshold"
+	default 3
+	depends on TICKLESS_IDLE
+	help
+	This option enables clock interrupt suppression when the kernel idles
+	for only a short period of time. It specifies the minimum number of
+	ticks that must occur before the next kernel timer expires in order
+	for suppression to happen.
+
+endif