media: imx: imx7-media-csi: Simplify imx7_csi_rx_fifo_clear()

There's no need to read the CSICR1 register before each write in
imx7_csi_rx_fifo_clear(). Simplify the function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/staging/media/imx/imx7-media-csi.c b/drivers/staging/media/imx/imx7-media-csi.c
index 3d1dd8ef9d87f63eb731de451e88097ac882258b..fb09af335edf95429f29eb7755f51efd044d7c52 100644 (file)
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -294,14 +294,10 @@ static void imx7_csi_dma_reflash(struct imx7_csi *csi)
 
 static void imx7_csi_rx_fifo_clear(struct imx7_csi *csi)
 {
-       u32 cr1;
+       u32 cr1 = imx7_csi_reg_read(csi, CSI_CSICR1) & ~BIT_FCC;
 
-       cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
-       imx7_csi_reg_write(csi, cr1 & ~BIT_FCC, CSI_CSICR1);
-       cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
+       imx7_csi_reg_write(csi, cr1, CSI_CSICR1);
        imx7_csi_reg_write(csi, cr1 | BIT_CLR_RXFIFO, CSI_CSICR1);
-
-       cr1 = imx7_csi_reg_read(csi, CSI_CSICR1);
        imx7_csi_reg_write(csi, cr1 | BIT_FCC, CSI_CSICR1);
 }