jetson tx2 module rtc supply voltage

Hi
I would like to know how much is the tx2 module’s RTC supply voltage?
When i remove the battery(MS621F-3.0V) tx2 module A50 pin shows a 2.5v which cannot fully charge the battery
Is it variable through the driver or fixed by CPU ?

Try to add the to the ldo4 in your device tree.

				regulator-min-microvolt = <3000000>;
				regulator-max-microvolt = <3000000>;
spmic_ldo4: ldo4 {
					regulator-name = "vdd-rtc";
					regulator-always-on;
					regulator-boot-on;
					maxim,active-fps-source = <MAX77620_FPS_SRC_DEF>;
				};

Hi ShaneCCC

Thanks for reply!

Additional question about the PMIC:
We need to choose a suitable battery for tx2 RTC function to continue working for 2 weeks and we have to know the specific parameter of RTC part of PMIC.However it is unlikely we can get this information from Maxim quickly and easily since we haven’t do any business with Maxim so far.Can you just provide a piture about the RTC current consumption of this PMIC?

Please refer to this topic: https://devtalk.nvidia.com/default/topic/1025653/?comment=5216700