6 Enable support for various drivers needed on the Android platform
10 config ANDROID_BINDER_IPC
11 bool "Android Binder IPC Driver"
15 Binder is used in Android for both communication between processes,
16 and remote method invocation.
18 This means one Android process can call a method/routine in another
19 Android process, using Binder to identify, invoke and pass arguments
20 between said processes.
22 config ANDROID_BINDER_IPC_32BIT
24 depends on !64BIT && ANDROID_BINDER_IPC
27 The Binder API has been changed to support both 32 and 64bit
28 applications in a mixed environment.
30 Enable this to support an old 32-bit Android user-space (v4.4 and
33 Note that enabling this will break newer Android user-space.
36 bool "Enable the Anonymous Shared Memory Subsystem"
40 The ashmem subsystem is a new shared memory allocator, similar to
41 POSIX SHM but with different behavior and sporting a simpler
44 It is, in theory, a good memory allocator for low-memory devices,
45 because it can discard shared memory units when under memory pressure.
48 tristate "Android log driver"
51 This adds support for system-wide logging using four log buffers.
60 Log reading and writing is performed via normal Linux reads and
61 optimized writes. This optimization avoids logging having too
62 much overhead in the system.
64 config ANDROID_TIMED_OUTPUT
65 bool "Timed output class driver"
68 config ANDROID_TIMED_GPIO
69 tristate "Android timed gpio driver"
70 depends on GPIOLIB && ANDROID_TIMED_OUTPUT
73 config ANDROID_LOW_MEMORY_KILLER
74 bool "Android Low Memory Killer"
76 Registers processes to be killed when memory is low
78 config ANDROID_INTF_ALARM_DEV
79 bool "Android alarm driver"
83 Provides non-wakeup and rtc backed wakeup alarms based on rtc or
84 elapsed realtime, and a non-wakeup alarm on the monotonic clock.
85 Also exports the alarm interface to user-space.
88 bool "Synchronization framework"
91 select DMA_SHARED_BUFFER
93 This option enables the framework for synchronization between multiple
94 drivers. Sync implementations can take advantage of hardware
95 synchronization built into devices like GPUs.
98 bool "Software synchronization objects"
102 A sync object driver that uses a 32bit counter to coordinate
103 syncrhronization. Useful when there is no hardware primitive backing
107 bool "Userspace API for SW_SYNC"
111 Provides a user space API to the sw sync object.
112 *WARNING* improper use of this can result in deadlocking kernel
113 drivers from userspace.
115 source "drivers/staging/android/ion/Kconfig"