[mirror_ubuntu-artful-kernel.git] / drivers / staging / android / Kconfig

menu "Android"

config ANDROID
	bool "Android Drivers"
	default N
	---help---
	  Enable support for various drivers needed on the Android platform

if ANDROID

config ANDROID_BINDER_IPC
	bool "Android Binder IPC Driver"
	depends on MMU
	default n
	---help---
	  Binder is used in Android for both communication between processes,
	  and remote method invocation.

	  This means one Android process can call a method/routine in another
	  Android process, using Binder to identify, invoke and pass arguments
	  between said processes.

config ASHMEM
	bool "Enable the Anonymous Shared Memory Subsystem"
	default n
	depends on SHMEM
	---help---
	  The ashmem subsystem is a new shared memory allocator, similar to
	  POSIX SHM but with different behavior and sporting a simpler
	  file-based API.

	  It is, in theory, a good memory allocator for low-memory devices,
	  because it can discard shared memory units when under memory pressure.

config ANDROID_LOGGER
	tristate "Android log driver"
	default n
	---help---
	  This adds support for system-wide logging using four log buffers.

	  These are:

	      1: main
	      2: events
	      3: radio
	      4: system

	  Log reading and writing is performed via normal Linux reads and
	  optimized writes. This optimization avoids logging having too
	  much overhead in the system.

config ANDROID_TIMED_OUTPUT
	bool "Timed output class driver"
	default y

config ANDROID_TIMED_GPIO
	tristate "Android timed gpio driver"
	depends on GPIOLIB && ANDROID_TIMED_OUTPUT
	default n

config ANDROID_LOW_MEMORY_KILLER
	bool "Android Low Memory Killer"
	default N
	---help---
	  Registers processes to be killed when memory is low

config ANDROID_INTF_ALARM_DEV
	bool "Android alarm driver"
	depends on RTC_CLASS
	default n
	---help---
	  Provides non-wakeup and rtc backed wakeup alarms based on rtc or
	  elapsed realtime, and a non-wakeup alarm on the monotonic clock.
	  Also exports the alarm interface to user-space.

config SYNC
	bool "Synchronization framework"
	default n
	select ANON_INODES
	---help---
	  This option enables the framework for synchronization between multiple
	  drivers.  Sync implementations can take advantage of hardware
	  synchronization built into devices like GPUs.

config SW_SYNC
	bool "Software synchronization objects"
	default n
	depends on SYNC
	---help---
	  A sync object driver that uses a 32bit counter to coordinate
	  syncrhronization.  Useful when there is no hardware primitive backing
	  the synchronization.

config SW_SYNC_USER
	bool "Userspace API for SW_SYNC"
	default n
	depends on SW_SYNC
	---help---
	  Provides a user space API to the sw sync object.
	  *WARNING* improper use of this can result in deadlocking kernel
	  drivers from userspace.

source "drivers/staging/android/ion/Kconfig"

endif # if ANDROID

endmenu
Commit	Line	Data
355b0502 GKH	1	menu "Android"
	2
	3	config ANDROID
	4	bool "Android Drivers"
355b0502 GKH	5	default N
	6	---help---
	7	Enable support for various drivers needed on the Android platform
	8
	9	if ANDROID
	10
	11	config ANDROID_BINDER_IPC
	12	bool "Android Binder IPC Driver"
31507f74	13	depends on MMU
355b0502	14	default n
d7f9729f CJB	15	---help---
	16	Binder is used in Android for both communication between processes,
	17	and remote method invocation.
	18
	19	This means one Android process can call a method/routine in another
	20	Android process, using Binder to identify, invoke and pass arguments
	21	between said processes.
355b0502	22
11980c2a RL	23	config ASHMEM
	24	bool "Enable the Anonymous Shared Memory Subsystem"
	25	default n
2c0fb1c9	26	depends on SHMEM
d7f9729f	27	---help---
11980c2a RL	28	The ashmem subsystem is a new shared memory allocator, similar to
	29	POSIX SHM but with different behavior and sporting a simpler
	30	file-based API.
	31
d7f9729f CJB	32	It is, in theory, a good memory allocator for low-memory devices,
	33	because it can discard shared memory units when under memory pressure.
	34
355b0502 GKH	35	config ANDROID_LOGGER
	36	tristate "Android log driver"
	37	default n
d7f9729f CJB	38	---help---
	39	This adds support for system-wide logging using four log buffers.
	40
	41	These are:
	42
	43	1: main
	44	2: events
	45	3: radio
	46	4: system
	47
	48	Log reading and writing is performed via normal Linux reads and
	49	optimized writes. This optimization avoids logging having too
	50	much overhead in the system.
355b0502	51
355b0502 GKH	52	config ANDROID_TIMED_OUTPUT
	53	bool "Timed output class driver"
	54	default y
	55
	56	config ANDROID_TIMED_GPIO
	57	tristate "Android timed gpio driver"
76ec9d18	58	depends on GPIOLIB && ANDROID_TIMED_OUTPUT
355b0502 GKH	59	default n
	60
	61	config ANDROID_LOW_MEMORY_KILLER
	62	bool "Android Low Memory Killer"
	63	default N
	64	---help---
d7f9729f	65	Registers processes to be killed when memory is low
355b0502	66
ef2353d2	67	config ANDROID_INTF_ALARM_DEV
fe8d2727 JS	68	bool "Android alarm driver"
fe8d2727 JS	69	depends on RTC_CLASS
58a38ff3	70	default n
d7f9729f	71	---help---
fe8d2727 JS	72	Provides non-wakeup and rtc backed wakeup alarms based on rtc or
fe8d2727 JS	73	elapsed realtime, and a non-wakeup alarm on the monotonic clock.
ef2353d2	74	Also exports the alarm interface to user-space.
fe8d2727	75
7ad530bf EG	76	config SYNC
	77	bool "Synchronization framework"
	78	default n
	79	select ANON_INODES
fb51b500	80	---help---
7ad530bf EG	81	This option enables the framework for synchronization between multiple
	82	drivers. Sync implementations can take advantage of hardware
	83	synchronization built into devices like GPUs.
	84
9d1906e6 EG	85	config SW_SYNC
	86	bool "Software synchronization objects"
	87	default n
	88	depends on SYNC
fb51b500	89	---help---
9d1906e6 EG	90	A sync object driver that uses a 32bit counter to coordinate
	91	syncrhronization. Useful when there is no hardware primitive backing
	92	the synchronization.
	93
	94	config SW_SYNC_USER
	95	bool "Userspace API for SW_SYNC"
	96	default n
	97	depends on SW_SYNC
fb51b500	98	---help---
9d1906e6 EG	99	Provides a user space API to the sw sync object.
	100	WARNING improper use of this can result in deadlocking kernel
	101	drivers from userspace.
	102
c30707be RSZ	103	source "drivers/staging/android/ion/Kconfig"
c30707be RSZ	104
355b0502 GKH	105	endif # if ANDROID
	106
	107	endmenu