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misc: k3_avs: add driver for K3 Adaptive Voltage Scaling Class 0

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Adaptive Voltage Scaling is a technology used in TI SoCs to optimize
the operating voltage based on characterization data written to efuse
during production. Add a driver to support this feature for K3 line of
SoCs, initially for AM65x.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
This commit is contained in:
Tero Kristo
2019-10-24 15:00:46 +05:30
committed by Tom Rini
parent 0be2ecd486
commit 9d233b4e3e
4 changed files with 404 additions and 0 deletions
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9
drivers/misc/Kconfig
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@@ -421,4 +421,13 @@ config MICROCHIP_FLEXCOM
Only one function can be used at a time and is chosen at boot time
according to the device tree.
config K3_AVS0
depends on ARCH_K3 && SPL_DM_REGULATOR
bool "AVS class 0 support for K3 devices"
help
K3 devices have the optimized voltage values for the main voltage
domains stored in efuse within the VTM IP. This driver reads the
optimized voltage from the efuse, so that it can be programmed
to the PMIC on board.
endmenu