/usr/bin/aarch64-linux-gnu-ld.bfd: drivers/gpio/sl28cpld-gpio.o: in function `sl28cpld_gpio_get_function':
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:118: undefined reference to `sl28cpld_read'
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:118:(.text.sl28cpld_gpio_get_function+0x34): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `sl28cpld_read'
/usr/bin/aarch64-linux-gnu-ld.bfd: drivers/gpio/sl28cpld-gpio.o: in function `sl28cpld_gpio_get_value':
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:50: undefined reference to `sl28cpld_read'
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:50:(.text.sl28cpld_gpio_get_value+0x30): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `sl28cpld_read'
/usr/bin/aarch64-linux-gnu-ld.bfd: drivers/gpio/sl28cpld-gpio.o: in function `sl28cpld_gpio_set_value':
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:76: undefined reference to `sl28cpld_update'
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:76:(.text.sl28cpld_gpio_set_value+0x58): relocation truncated to fit: R_AARCH64_JUMP26 against undefined symbol `sl28cpld_update'
/usr/bin/aarch64-linux-gnu-ld.bfd: drivers/gpio/sl28cpld-gpio.o: in function `sl28cpld_gpio_direction_output':
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:106: undefined reference to `sl28cpld_update'
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:106:(.text.sl28cpld_gpio_direction_output+0x5c): relocation truncated to fit: R_AARCH64_JUMP26 against undefined symbol `sl28cpld_update'
/usr/bin/aarch64-linux-gnu-ld.bfd: drivers/gpio/sl28cpld-gpio.o: in function `sl28cpld_gpio_direction_input':
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:87: undefined reference to `sl28cpld_update'
/home/qschulz/work/upstream/u-boot/drivers/gpio/sl28cpld-gpio.c:87:(.text.sl28cpld_gpio_direction_input+0x38): relocation truncated to fit: R_AARCH64_JUMP26 against undefined symbol `sl28cpld_update'
make[1]: *** [scripts/Makefile.spl:527: spl/u-boot-spl] Error 1
make: *** [Makefile:2055: spl/u-boot-spl] Error 2