OMAP3+: introduce generic ABB support
authorAndrii Tseglytskyi <andrii.tseglytskyi@ti.com>
Mon, 20 May 2013 22:42:08 +0000 (22:42 +0000)
committerTom Rini <trini@ti.com>
Mon, 10 Jun 2013 12:43:09 +0000 (08:43 -0400)
commit4d0df9c1e94f32a9695be352fead3167fb5135c7
treef1295abc801b55014db970ee1727d8ae206bc232
parenta662e0c345b4cd9f4c2d51796154ad4a345a72a5
OMAP3+: introduce generic ABB support

Adaptive Body Biasing (ABB) modulates transistor bias voltages
dynamically in order to optimize switching speed versus leakage.
Adaptive Body-Bias ldos are present for some voltage domains
starting with OMAP3630. There are three modes of operation:

* Bypass - the default, it just follows the vdd voltage
* Foward Body-Bias - applies voltage bias to increase transistor
  performance at the cost of power.  Used to operate safely at high
  OPPs.
* Reverse Body-Bias - applies voltage bias to decrease leakage and
  save power.  Used to save power at lower OPPs.

Signed-off-by: Andrii Tseglytskyi <andrii.tseglytskyi@ti.com>
Acked-by: Nishanth Menon <nm@ti.com>
arch/arm/cpu/armv7/omap-common/Makefile
arch/arm/cpu/armv7/omap-common/abb.c [new file with mode: 0644]
arch/arm/cpu/armv7/omap5/Makefile
arch/arm/cpu/armv7/omap5/abb.c [new file with mode: 0644]
arch/arm/include/asm/arch-omap3/omap3.h
arch/arm/include/asm/arch-omap4/omap.h
arch/arm/include/asm/arch-omap5/omap.h
arch/arm/include/asm/omap_common.h