2 files changed, 5 insertions, 0 deletions
diff --git a/src/avr/gpio.c b/src/avr/gpio.c
index a6b7aa41..fdb18562 100644
--- a/src/avr/gpio.c
+++ b/src/avr/gpio.c
@@ -438,6 +438,10 @@ spi_setup(uint32_t bus, uint8_t mode, uint32_t rate)
     return config;
 }
 
+void spi_prepare(struct spi_config config)
+{
+}
+
 void
 spi_transfer(struct spi_config config, uint8_t receive_data
              , uint8_t len, uint8_t *data)
diff --git a/src/avr/gpio.h b/src/avr/gpio.h
index 515e4c9a..2f769cb9 100644
--- a/src/avr/gpio.h
+++ b/src/avr/gpio.h
@@ -39,6 +39,7 @@ struct spi_config {
     uint8_t spcr, spsr;
 };
 struct spi_config spi_setup(uint32_t bus, uint8_t mode, uint32_t rate);
+void spi_prepare(struct spi_config config);
 void spi_transfer(struct spi_config config, uint8_t receive_data
                   , uint8_t len, uint8_t *data);