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-rw-r--r--src/samd21/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/samd21/Makefile b/src/samd21/Makefile
index d1f72fb2..a5135d24 100644
--- a/src/samd21/Makefile
+++ b/src/samd21/Makefile
@@ -21,6 +21,7 @@ src-y += ../lib/samd21/samd21a/gcc/gcc/startup_samd21.c
src-$(CONFIG_USBSERIAL) += samd21/usbserial.c generic/usb_cdc.c
src-$(CONFIG_SERIAL) += samd21/serial.c generic/serial_irq.c
src-$(CONFIG_HAVE_GPIO_I2C) += samd21/i2c.c
+src-$(CONFIG_HAVE_GPIO_SPI) += samd21/spi.c
# Support bootloader offset address
target-y := $(OUT)samd21.ld $(target-y)