> The SPI controller's documentation (I only had access to the RK3399, > RK3368 and PX30 TRMs) specifies that, when operating in master-mode, > the controller will stop the SCLK to avoid RXFIFO overruns and TXFIFO > underruns. Looks like my worries that we'd need to support DMA-330 > (aka PL330) to make any further progress were unfounded. > > This adds a driver-data structure to capture hardware-specific > settings of individual controller instances (after all, we don't know > if all versions are well-behaved) and adds a 'master_manages_fifo' > flag to it. The first use of said flag is in the optimised > receive-only transfer-handler, which can now request 64Kframe > (i.e. 128KByte) bursts of data on each reprogramming of CTRLR1 > (i.e. every time through the loop). > > This improves throughput to 46.85MBit/s (a 94.65% bus-utilisation). > > Signed-off-by: Philipp Tomsich <[email protected]> > --- > > drivers/spi/rk_spi.c | 24 ++++++++++++++++++++++-- > 1 file changed, 22 insertions(+), 2 deletions(-) >
Applied to u-boot-rockchip, thanks! _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
