This page lists everywhere in the U-Boot source code that Makefiles are testing “CONFIG_” Kbuild options that do not appear to be defined in any Kconfig file.
>>>>> ADI_GPIO2 ./drivers/gpio/Makefile:obj-$(CONFIG_ADI_GPIO2) += adi_gpio2.o >>>>> ALI152X ./drivers/misc/Makefile:obj-$(CONFIG_ALI152X) += ali512x.o >>>>> CMD_INI ./cmd/Makefile:obj-$(CONFIG_CMD_INI) += ini.o >>>>> CMD_MFSL ./cmd/Makefile:obj-$(CONFIG_CMD_MFSL) += mfsl.o >>>>> DATAFLASH_MMC_SELECT ./cmd/Makefile:obj-$(CONFIG_DATAFLASH_MMC_SELECT) += dataflash_mmc_mux.o >>>>> DB8500_GPIO ./drivers/gpio/Makefile:obj-$(CONFIG_DB8500_GPIO) += db8500_gpio.o >>>>> DLVISION_10G ./board/gdsys/common/Makefile:obj-$(CONFIG_DLVISION_10G) += osd.o dp501.o >>>>> DM644X_GPIO ./drivers/gpio/Makefile:obj-$(CONFIG_DM644X_GPIO) += da8xx_gpio.o >>>>> EXYNOS_PWM_BL ./drivers/video/exynos/Makefile:obj-$(CONFIG_EXYNOS_PWM_BL) += exynos_pwm_bl.o >>>>> FTMAC110 ./drivers/net/Makefile:obj-$(CONFIG_FTMAC110) += ftmac110.o >>>>> IO64 ./board/gdsys/common/Makefile:obj-$(CONFIG_IO64) += miiphybb.o >>>>> IOCON ./board/gdsys/common/Makefile:obj-$(CONFIG_IOCON) += osd.o mclink.o dp501.o phy.o ch7301.o >>>>> KALLSYMS ./Makefile:ifeq ($(CONFIG_KALLSYMS),y) ./common/Makefile:obj-$(CONFIG_KALLSYMS) += kallsyms.o >>>>> LAN91C96 ./drivers/net/Makefile:obj-$(CONFIG_LAN91C96) += lan91c96.o >>>>> MACH_DAVINCI_DA830_EVM ./board/davinci/da8xxevm/Makefile:obj-$(CONFIG_MACH_DAVINCI_DA830_EVM) += da830evm.o >>>>> MW_EEPROM ./drivers/mtd/Makefile:obj-$(CONFIG_MW_EEPROM) += mw_eeprom.o >>>>> NAND_FSL_UPM ./drivers/mtd/nand/raw/Makefile:obj-$(CONFIG_NAND_FSL_UPM) += fsl_upm.o >>>>> NAND_KB9202 ./drivers/mtd/nand/raw/Makefile:obj-$(CONFIG_NAND_KB9202) += kb9202_nand.o >>>>> NAND_PLAT ./drivers/mtd/nand/raw/Makefile:obj-$(CONFIG_NAND_PLAT) += nand_plat.o >>>>> NAND_SPEAR ./drivers/mtd/nand/raw/Makefile:obj-$(CONFIG_NAND_SPEAR) += spr_nand.o >>>>> NATSEMI ./drivers/net/Makefile:obj-$(CONFIG_NATSEMI) += natsemi.o >>>>> NS8382X ./drivers/net/Makefile:obj-$(CONFIG_NS8382X) += ns8382x.o >>>>> NS87308 ./drivers/misc/Makefile:obj-$(CONFIG_NS87308) += ns87308.o >>>>> ONENAND_U_BOOT ./Makefile:ALL-$(CONFIG_ONENAND_U_BOOT) += u-boot-onenand.bin >>>>> P2020DS ./board/freescale/common/Makefile:obj-$(CONFIG_P2020DS) += ics307_clk.o >>>>> PINCTRL_QCA953x ./drivers/pinctrl/ath79/Makefile:obj-$(CONFIG_PINCTRL_QCA953x) += pinctrl_qca953x.o >>>>> POWER_BATTERY_TRATS ./drivers/power/battery/Makefile:obj-$(CONFIG_POWER_BATTERY_TRATS) += bat_trats.o >>>>> POWER_BATTERY_TRATS2 ./drivers/power/battery/Makefile:obj-$(CONFIG_POWER_BATTERY_TRATS2) += bat_trats2.o >>>>> POWER_FG_MAX77693 ./drivers/power/mfd/Makefile:obj-$(CONFIG_POWER_FG_MAX77693) += fg_max77693.o >>>>> POWER_MAX8997 ./drivers/power/pmic/Makefile:obj-$(CONFIG_POWER_MAX8997) += pmic_max8997.o >>>>> POWER_MAX8998 ./drivers/power/pmic/Makefile:obj-$(CONFIG_POWER_MAX8998) += pmic_max8998.o >>>>> POWER_MUIC_MAX77693 ./drivers/power/mfd/Makefile:obj-$(CONFIG_POWER_MUIC_MAX77693) += muic_max77693.o >>>>> POWER_MUIC_MAX8997 ./drivers/power/pmic/Makefile:obj-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o >>>>> POWER_PMIC_MAX77693 ./drivers/power/mfd/Makefile:obj-$(CONFIG_POWER_PMIC_MAX77693) += pmic_max77693.o >>>>> RTC_AT91SAM9_RTT ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_AT91SAM9_RTT) += at91sam9_rtt.o >>>>> RTC_DAVINCI ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DAVINCI) += davinci.o >>>>> RTC_DS1302 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS1302) += ds1302.o >>>>> RTC_DS1306 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS1306) += ds1306.o >>>>> RTC_DS1339 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS1339) += ds1307.o >>>>> RTC_DS1556 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS1556) += ds1556.o >>>>> RTC_DS164x ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS164x) += ds164x.o >>>>> RTC_DS174x ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_DS174x) += ds174x.o >>>>> RTC_M41T60 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_M41T60) += m41t60.o >>>>> RTC_M41T94 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_M41T94) += m41t94.o >>>>> RTC_M48T35A ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_M48T35A) += m48t35ax.o >>>>> RTC_MAX6900 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_MAX6900) += max6900.o >>>>> RTC_MX27 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_MX27) += mx27rtc.o >>>>> RTC_RS5C372A ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_RS5C372A) += rs5c372.o >>>>> RTC_S3C24X0 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_S3C24X0) += s3c24x0_rtc.o >>>>> RTC_X1205 ./drivers/rtc/Makefile:obj-$(CONFIG_RTC_X1205) += x1205.o >>>>> S6E8AX0 ./drivers/video/Makefile:obj-$(CONFIG_S6E8AX0) += s6e8ax0.o >>>>> SHA1_CHECK_UB_IMG ./tools/Makefile:CONFIG_SHA1_CHECK_UB_IMG = y ./tools/Makefile:hostprogs-$(CONFIG_SHA1_CHECK_UB_IMG) += ubsha1 >>>>> SYS_FPGA_COMMON ./board/gdsys/common/Makefile:obj-$(CONFIG_SYS_FPGA_COMMON) += fpga.o >>>>> TEST_FDTDEC ./lib/Makefile:obj-$(CONFIG_TEST_FDTDEC) += fdtdec_test.o >>>>> USB_EHCI_FARADAY ./drivers/usb/host/Makefile:obj-$(CONFIG_USB_EHCI_FARADAY) += ehci-faraday.o >>>>> USB_EHCI_RMOBILE ./drivers/usb/host/Makefile:obj-$(CONFIG_USB_EHCI_RMOBILE) += ehci-rmobile.o >>>>> USB_GADGET_FOTG210 ./drivers/usb/gadget/Makefile:obj-$(CONFIG_USB_GADGET_FOTG210) += fotg210.o >>>>> USB_OHCI_DA8XX ./drivers/usb/host/Makefile:obj-$(CONFIG_USB_OHCI_DA8XX) += ohci-da8xx.o >>>>> USB_SL811HS ./drivers/usb/host/Makefile:obj-$(CONFIG_USB_SL811HS) += sl811-hcd.o >>>>> USE_PLUGIN ./board/freescale/mx7ulp_evk/Makefile:extra-$(CONFIG_USE_PLUGIN) := plugin.bin >>>>> XWAY_SWAP_BYTES ./tools/Makefile:CONFIG_XWAY_SWAP_BYTES = y ./tools/Makefile:hostprogs-$(CONFIG_XWAY_SWAP_BYTES) += xway-swap-bytes