platform_hardware_libhardware

History

Glenn Kasten a635449697 Use audio_channel_mask_t consistently Change-Id: Ib832c0b707b1e0b82adf4ab3d4d18a2dc459d240		2012-06-25 10:45:43 -07:00
..
audio	Use audio_channel_mask_t consistently	2012-06-25 10:45:43 -07:00
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	Introduce HWC_DEVICE_API_VERSION_1_0	2012-06-18 15:53:25 -07:00
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	remove triggering suspend from power hal	2012-05-03 19:01:02 -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/.