arm: mvebu: set 38x and 39x AVS on lower frequency
Reduce Auto Voltage Scaling VDD limit when core frequency is lower than
1600MHz. This reduces core voltage level from 1.25V to 1.15V, which
saves power.
The code is taken from Marvell's U-Boot 2013.01 revision 18.06.
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Tested-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index d54de51..3cb27b7 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -126,6 +126,9 @@
ddr3_init();
#endif
+ /* Initialize Auto Voltage Scaling */
+ mv_avs_init();
+
/*
* Return to the BootROM to continue the Marvell xmodem
* UART boot protocol. As initiated by the kwboot tool.