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Linux/drivers/staging/android/Kconfig

  1 menu "Android"
  2 
  3 config ANDROID
  4         bool "Android Drivers"
  5         ---help---
  6           Enable support for various drivers needed on the Android platform
  7 
  8 if ANDROID
  9 
 10 config ANDROID_BINDER_IPC
 11         bool "Android Binder IPC Driver"
 12         depends on MMU
 13         default n
 14         ---help---
 15           Binder is used in Android for both communication between processes,
 16           and remote method invocation.
 17 
 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.
 21 
 22 config ANDROID_BINDER_IPC_32BIT
 23         bool
 24         depends on !64BIT && ANDROID_BINDER_IPC
 25         default y
 26         ---help---
 27           The Binder API has been changed to support both 32 and 64bit
 28           applications in a mixed environment.
 29 
 30           Enable this to support an old 32-bit Android user-space (v4.4 and
 31           earlier).
 32 
 33           Note that enabling this will break newer Android user-space.
 34 
 35 config ASHMEM
 36         bool "Enable the Anonymous Shared Memory Subsystem"
 37         default n
 38         depends on SHMEM
 39         ---help---
 40           The ashmem subsystem is a new shared memory allocator, similar to
 41           POSIX SHM but with different behavior and sporting a simpler
 42           file-based API.
 43 
 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.
 46 
 47 config ANDROID_LOGGER
 48         tristate "Android log driver"
 49         default n
 50         ---help---
 51           This adds support for system-wide logging using four log buffers.
 52 
 53           These are:
 54 
 55               1: main
 56               2: events
 57               3: radio
 58               4: system
 59 
 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.
 63 
 64 config ANDROID_TIMED_OUTPUT
 65         bool "Timed output class driver"
 66         default y
 67 
 68 config ANDROID_TIMED_GPIO
 69         tristate "Android timed gpio driver"
 70         depends on GPIOLIB && ANDROID_TIMED_OUTPUT
 71         default n
 72 
 73 config ANDROID_LOW_MEMORY_KILLER
 74         bool "Android Low Memory Killer"
 75         ---help---
 76           Registers processes to be killed when memory is low
 77 
 78 config ANDROID_INTF_ALARM_DEV
 79         tristate "Android alarm driver"
 80         depends on RTC_CLASS
 81         default n
 82         ---help---
 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.
 86 
 87 config SYNC
 88         bool "Synchronization framework"
 89         default n
 90         select ANON_INODES
 91         select DMA_SHARED_BUFFER
 92         ---help---
 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.
 96 
 97 config SW_SYNC
 98         bool "Software synchronization objects"
 99         default n
100         depends on SYNC
101         ---help---
102           A sync object driver that uses a 32bit counter to coordinate
103           syncrhronization.  Useful when there is no hardware primitive backing
104           the synchronization.
105 
106 config SW_SYNC_USER
107         bool "Userspace API for SW_SYNC"
108         default n
109         depends on SW_SYNC
110         ---help---
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.
114 
115 source "drivers/staging/android/ion/Kconfig"
116 
117 endif # if ANDROID
118 
119 endmenu

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