Unverified Commit 577f1cf7 authored by Jon Lin's avatar Jon Lin Committed by Mark Brown
Browse files

spi: rockchip-sfc: Optimize the judgment mechanism completed by the controller 



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: default avatarJon Lin <jon.lin@rock-chips.com>
Link: https://patch.msgid.link/20241203013513.2628810-1-jon.lin@rock-chips.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent ba257e70

drivers/spi/spi-rockchip-sfc.c

+10 −0
Original line number Diff line number Diff line
@@ -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);