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OMAP3: PM: Adding smartreflex driver support.
SmartReflex modules do adaptive voltage control for real-time voltage adjustments. With Smartreflex the power supply voltage can be adapted to the silicon performance(manufacturing process, temperature induced performance, age induced performance etc). There are differnet classes of smartreflex implementation. Class-0: Manufacturing Test Calibration Class-1: Boot-Time Software Calibration Class-2: Continuous Software Calibration Class-3: Continuous Hardware Calibration Class-4: Fully Integrated Power Management OMAP3 has two smartreflex modules one associated with VDD MPU and the other associated with VDD CORE. This patch adds support for smartreflex driver. The driver is designed for Class-1 , Class-2 and Class-3 support and is a platform driver. Smartreflex driver can be enabled through a Kconfig option "SmartReflex support" under "System type"->"TI OMAP implementations" menu. Smartreflex autocompensation feature can be enabled runtime through a debug fs option. To enable smartreflex autocompensation feature echo 1 > /debug/voltage/vdd_<X>/smartreflex/autocomp To disable smartreflex autocompensation feature echo 0 > /debug/voltage/vdd_<X>/smartreflex/autocomp where X can be mpu, core , iva etc. This patch contains code originally in linux omap pm branch. Major contributors to this driver are Lesly A M, Rajendra Nayak, Kalle Jokiniemi, Paul Walmsley, Nishant Menon, Kevin Hilman. Signed-off-by: Thara Gopinath <thara@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
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‎arch/arm/mach-omap2/Makefile

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@@ -62,6 +62,7 @@ obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o voltage.o \
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cpuidle34xx.o pm_bus.o
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obj-$(CONFIG_ARCH_OMAP4) += pm44xx.o pm_bus.o
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obj-$(CONFIG_PM_DEBUG) += pm-debug.o
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obj-$(CONFIG_OMAP_SMARTREFLEX) += smartreflex.o
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AFLAGS_sleep24xx.o :=-Wa,-march=armv6
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AFLAGS_sleep34xx.o :=-Wa,-march=armv7-a

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