platform_hardware_libhardware

History

Glenn Kasten fad1f606a2 Merge "set_mode and set_phone_state now take audio_mode_t"		2012-01-17 11:33:22 -08:00
..
audio	Merge "set_mode and set_phone_state now take audio_mode_t"	2012-01-17 11:33:22 -08:00
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
nfc	New NFC HAL.	2011-11-04 09:05:22 -07:00
Android.mk	New NFC HAL.	2011-11-04 09:05:22 -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/.