depends on MFD_WM831X
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
-@@ -10,6 +10,7 @@ obj-$(CONFIG_GENERIC_ADC_BATTERY) += gen
- obj-$(CONFIG_PDA_POWER) += pda_power.o
+@@ -11,6 +11,7 @@ obj-$(CONFIG_PDA_POWER) += pda_power.o
obj-$(CONFIG_APM_POWER) += apm_power.o
+ obj-$(CONFIG_AXP20X_POWER) += axp20x_usb_power.o
obj-$(CONFIG_MAX8925_POWER) += max8925_power.o
+obj-$(CONFIG_MXS_POWER) += mxs_power.o
obj-$(CONFIG_WM831X_BACKUP) += wm831x_backup.o