1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/avr/spi_master.h b/drivers/avr/spi_master.h
index 0bab2dc24..b69c1cbd6 100644
--- a/drivers/avr/spi_master.h
+++ b/drivers/avr/spi_master.h
@@ -41,15 +41,15 @@ extern "C" {
 #endif
 void spi_init(void);
 
-void spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint8_t divisor);
+bool spi_start(pin_t slavePin, bool lsbFirst, uint8_t mode, uint16_t divisor);
 
-spi_status_t spi_write(uint8_t data, uint16_t timeout);
+spi_status_t spi_write(uint8_t data);
 
-spi_status_t spi_read(uint16_t timeout);
+spi_status_t spi_read(void);
 
-spi_status_t spi_transmit(const uint8_t *data, uint16_t length, uint16_t timeout);
+spi_status_t spi_transmit(const uint8_t *data, uint16_t length);
 
-spi_status_t spi_receive(uint8_t *data, uint16_t length, uint16_t timeout);
+spi_status_t spi_receive(uint8_t *data, uint16_t length);
 
 void spi_stop(void);
 #ifdef __cplusplus