platform_hardware_libhardware

History

Alex Ray ed6b8a7710 modules: camera: Add tracing Change-Id: I00ee447e6b57bc57fd09b6e7d8c62cb07cb37cf0		2013-01-03 21:06:27 -08:00
..
audio	audio: new audio devices enums	2012-09-07 10:32:57 -07:00
audio_remote_submix	Use strong pointers and scope	2012-12-21 12:24:58 -08:00
camera	modules: camera: Add tracing	2013-01-03 21:06:27 -08:00
gralloc	am `8405fe5a`: am `1fbbb08d`: Merge "remove seemed useless gralloc_open() call in fb_device_open()"	2012-06-12 15:18:23 -07:00
hwcomposer	Add multi-display and flip fence to HWC	2012-08-07 12:26:59 -07:00
local_time	Modifications to audio_hal for Android@Home.	2012-02-10 08:58:32 -08:00
nfc	Initial NFC HAL for NCI controllers.	2012-09-14 13:56:58 -07:00
nfc-nci	NFC HAL: Use a separate callback for data.	2012-09-30 11:08:49 -07:00
power	remove triggering suspend from power hal	2012-05-03 19:01:02 -07:00
usbaudio	audio: new audio devices enums	2012-09-07 10:32:57 -07:00
Android.mk	Reference Camera v2 HAL Implementation	2012-11-28 12:35:29 -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/.