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| /rk3399_rockchip-uboot/drivers/spi/ |
| H A D | designware_spi.c | 6904f1891df1de1bc1dd54c7bb84e95212d454c4 Thu Mar 22 10:50:45 UTC 2018 Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> UPSTREAM: DW SPI: refactor poll_transfer functions
There is no sense in waiting for RX data in dw_reader function:
there is no chance that RX data will appear in RX FIFO if
RX FIFO is empty after previous TX write in dw_writer function.
So get rid of this waiting. After that we can get rid of dw_reader
return value and make it returning void. After that we can get rid
of dw_reader return value check in poll_transfer function.
With these changes we're getting closer to Linux DW SPI driver.
Change-Id: I2654951199094c51609c5402b5abd62438bbf1dd
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Jagan Teki <jagan@openedev.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
(cherry picked from commit d3d8aaec7401703079f296a6460fe649fb06581b)
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