There is very little data left in fifo, and the controller will
complete the transmission in a short period of time, so
use readl_poll_timeout() for busy wait 10us to accelerate response.
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
---
drivers/spi/spi-rockchip-sfc.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/spi/spi-rockchip-sfc.c b/drivers/spi/spi-rockchip-sfc.c
index 138508d2c736..14f5b9346050 100644
--- a/drivers/spi/spi-rockchip-sfc.c
+++ b/drivers/spi/spi-rockchip-sfc.c
@@ -472,6 +472,16 @@ static int rockchip_sfc_xfer_done(struct rockchip_sfc *sfc, u32 timeout_us)
int ret = 0;
u32 status;
+ /*
+ * There is very little data left in fifo, and the controller will
+ * complete the transmission in a short period of time.
+ */
+ ret = readl_poll_timeout(sfc->regbase + SFC_SR, status,
+ !(status & SFC_SR_IS_BUSY),
+ 0, 10);
+ if (!ret)
+ return 0;
+
ret = readl_poll_timeout(sfc->regbase + SFC_SR, status,
!(status & SFC_SR_IS_BUSY),
20, timeout_us);
--
2.34.1