diff --git a/drivers/spi/oc_tiny_spi.c b/drivers/spi/oc_tiny_spi.c
index fc01fb8..6f7b1ed 100644
--- a/drivers/spi/oc_tiny_spi.c
+++ b/drivers/spi/oc_tiny_spi.c
@@ -90,13 +90,10 @@
 	if (!spi_cs_is_valid(bus, cs) || gpio_request(cs, "tiny_spi"))
 		return NULL;
 
-	tiny_spi = malloc(sizeof(*tiny_spi));
+	tiny_spi = spi_alloc_slave(struct tiny_spi_slave, bus, cs);
 	if (!tiny_spi)
 		return NULL;
-	memset(tiny_spi, 0, sizeof(*tiny_spi));
 
-	tiny_spi->slave.bus = bus;
-	tiny_spi->slave.cs = cs;
 	tiny_spi->host = &tiny_spi_host_list[bus];
 	tiny_spi->mode = mode & (SPI_CPOL | SPI_CPHA);
 	tiny_spi->flg = mode & SPI_CS_HIGH ? 1 : 0;