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David Lin 4e8f561fcd vibrator: fix issue with ledtrig-transient support 
There's a problem with enabling the transient trigger in the HAL, that is
the trigger function exports tree properties - activate, state, and
duration which require to be chown'd to system:system during the init
process. Hence, the trigger will be now enabled in the init process and
the HAL will use the "activate" property to determine if the device has
vibrator support via ledtrig-transient.

Test: device vibrates with the driver supports ledtrig-transient

Change-Id: Ieb195ddc199c6372f5dcf3ca1b2be4fd59724717
Signed-off-by: David Lin <dtwlin@google.com>
2017-03-08 17:41:53 -08:00
..
audio resolve merge conflicts of d20fe45 to stage-aosp-master 2016-10-26 16:02:39 -07:00
audio_remote_submix Fix typo in error logs in r_submix open_input_stream function 2016-04-05 17:20:29 -07:00
camera modules/camera: Fix compiler warnings 2016-08-25 06:20:32 -07:00
consumerir Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
fingerprint Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
gralloc Merge \"Fix google-explicit-constructor warnings in libhardware\" 2016-06-30 23:14:35 +00:00
hwcomposer Add missing includes. 2015-01-28 19:54:13 -08:00
input Only log when actually receiving actual switch events. 2015-11-25 16:51:44 +00:00
local_time Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
nfc Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
nfc-nci Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
power modules/power: Silence compiler warnings 2016-08-25 06:13:52 -07:00
radio Add radio HAL stub to the build list; fix format warning. 2017-02-08 15:04:31 -08:00
sensors Sensors: MultiHal: ignore errors from poll calls 2016-08-08 17:05:52 +00:00
soundtrigger Add "clear" command. 2016-04-08 09:55:16 -07:00
thermal Add else branch to avoide fclose(NULL) 2016-11-16 09:26:53 +08:00
tv_input Begin converting Android.mk to Android.bp 2016-07-12 23:34:37 -07:00
usbaudio Simplify and clarify channel count/mask calculation for stream open routines. 2016-06-13 13:59:59 -06:00
usbcamera Fix google-explicit-constructor warnings in libhardware 2016-06-30 14:21:20 -07:00
vehicle vehicle hal further clarification / HVAC update 2016-04-06 15:37:07 -07:00
vibrator vibrator: fix issue with ledtrig-transient support 2017-03-08 17:41:53 -08:00
vr Add HAL for VR mode. 2016-01-27 17:58:31 -08:00
Android.mk Add radio HAL stub to the build list; fix format warning. 2017-02-08 15:04:31 -08:00
README.android auto import from //depot/cupcake/@135843 2009-03-03 19:32:14 -08:00

README.android 

Default (and possibly architecture dependents) HAL modules go here. 


libhardware.so eventually should contain *just* the HAL hub
(hardware.c), everything in it should be rewritten as modules.

Modules are .so in /system/libs/hw/ and have a well defined naming
convention:

    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.product.board>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.board.platform>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.<ro.arch>.so
    /system/libs/hw/<*_HARDWARE_MODULE_ID>.default.so

They also have a well defined interface which lives in include/hardware/.

A module can have several variants: "default", "arch" and "board", and they're
loaded in the "board", "arch" and "default" order.
The source code for the "board" variant, usually lives under partners/...

The source code for "default" and "arch" would usually
live under hardware/modules/.