platform_hardware_libhardware

History

Todd Poynor 1d1775bb4d hardware: libhardware: Power HAL add power hints Change-Id: I8ab0376e4f5d8ef09d5b1062cbfbb30c30c5bb96 Signed-off-by: Todd Poynor <toddpoynor@google.com>		2012-04-25 11:15:16 -07:00
..
audio	rename audio policy output flags.	2012-04-18 13:58:44 -07:00
gralloc	Rename (IF_)LOGE(_IF) to (IF_)ALOGE(_IF) DO NOT MERGE	2012-01-08 11:03:25 +00:00
hwcomposer	Rename (IF_)LOGD(_IF) to (IF_)ALOGD(_IF) DO NOT MERGE	2012-01-03 22:31:17 +00:00
local_time	Modifications to audio_hal for Android@Home.	2012-02-10 08:58:32 -08:00
nfc	add i2c_device_address member to nfc_pn544_device_t	2012-03-09 08:51:15 -08:00
power	hardware: libhardware: Power HAL add power hints	2012-04-25 11:15:16 -07:00
usbaudio	Update USB audio HAL to use API	2012-04-24 16:46:24 -07:00
Android.mk	usbaudio: add initial usbaudio default HAL	2012-04-12 22:48:10 -07:00
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/.