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TPS65023 实现1.35v 电源电压

Other Parts Discussed in Thread: TPS65023

我现在使用电源管理芯片是TPS65023。它提供了ARM内核电源电压CVDD 为1.2 v,主频为297Mhz。

想使我的ARM频率为432 MHZ,所以必须让电源电压为1.35 v。

我使用i2ctools配置寄存器,可以得到1.35 v。

i2cset -f -y 1 0x48 0x05 0x80

i2cset -f -y 1 0x48 0x06 0x16

ok!!!   它是1.35v


但是掉电重启后又回到默认的1.2 v了。

我有看到datasheet上的相关信息:

The CON_CTRL2 register can be used to take control the inductive converters.
RESET(1): CON_CTRL2[6] is reset to its default value by one of these events:
undervoltage lockout (UVLO)
HOT_RESET pulled low
RESPWRON active
VRTC below threshold


我该如何配置uboot 或UBL,让它可以开机就为1.35 v的电压呢?