diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 7292aa8..7e9d265 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1217,7 +1217,7 @@ static const struct platform_device_id atdma_devtypes[] = {
 	}
 };
 
-static inline struct at_dma_platform_data * __init at_dma_get_driver_data(
+static inline const struct at_dma_platform_data * __init at_dma_get_driver_data(
 						struct platform_device *pdev)
 {
 	if (pdev->dev.of_node) {
@@ -1255,7 +1255,7 @@ static int __init at_dma_probe(struct platform_device *pdev)
 	int			irq;
 	int			err;
 	int			i;
-	struct at_dma_platform_data *plat_dat;
+	const struct at_dma_platform_data *plat_dat;
 
 	/* setup platform data for each SoC */
 	dma_cap_set(DMA_MEMCPY, at91sam9rl_config.cap_mask);