diff options
Diffstat (limited to 'drivers/staging/android/Kconfig')
| -rw-r--r-- | drivers/staging/android/Kconfig | 78 |
1 files changed, 71 insertions, 7 deletions
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig index 0ce50d12c30..99e484f845f 100644 --- a/drivers/staging/android/Kconfig +++ b/drivers/staging/android/Kconfig @@ -2,7 +2,6 @@ menu "Android" config ANDROID bool "Android Drivers" - default N ---help--- Enable support for various drivers needed on the Android platform @@ -10,20 +9,57 @@ 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 ANDROID_BINDER_IPC_32BIT + bool + depends on !64BIT && ANDROID_BINDER_IPC + default y + ---help--- + The Binder API has been changed to support both 32 and 64bit + applications in a mixed environment. + + Enable this to support an old 32-bit Android user-space (v4.4 and + earlier). + + Note that enabling this will break newer Android user-space. config ASHMEM bool "Enable the Anonymous Shared Memory Subsystem" default n - depends on SHMEM || TINY_SHMEM - help + 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" @@ -31,24 +67,52 @@ config ANDROID_TIMED_OUTPUT config ANDROID_TIMED_GPIO tristate "Android timed gpio driver" - depends on GENERIC_GPIO && ANDROID_TIMED_OUTPUT + depends on GPIOLIB && ANDROID_TIMED_OUTPUT default n config ANDROID_LOW_MEMORY_KILLER bool "Android Low Memory Killer" - default N ---help--- - Register processes to be killed when memory is low + 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 + ---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 |