dmaengine: sun6i: Remove switch statement from buswidth convertion routine
Since the conversion routine is quite trivial, we don't need this switch, and
we can just use a simple calculation.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
index c771d90..609c5d8 100644
--- a/drivers/dma/sun6i-dma.c
+++ b/drivers/dma/sun6i-dma.c
@@ -248,20 +248,11 @@
static inline int convert_buswidth(enum dma_slave_buswidth addr_width, u8 *width)
{
- switch (addr_width) {
- case DMA_SLAVE_BUSWIDTH_1_BYTE:
- *width = 0;
- break;
- case DMA_SLAVE_BUSWIDTH_2_BYTES:
- *width = 1;
- break;
- case DMA_SLAVE_BUSWIDTH_4_BYTES:
- *width = 2;
- break;
- default:
+ if ((addr_width < DMA_SLAVE_BUSWIDTH_1_BYTE) ||
+ (addr_width > DMA_SLAVE_BUSWIDTH_4_BYTES))
return -EINVAL;
- }
+ *width = addr_width >> 1;
return 0;
}