Unverified Commit 133eb8e3 authored Oct 10, 2018 by Robin Gong Committed by Mark Brown Oct 12, 2018

spi: imx: use PIO mode if size is small



Use PIO mode instead if size is smaller than fifo size, since
dma may be less efficient.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 5ba5a373

drivers/spi/spi-imx.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -224,6 +224,9 @@ static bool spi_imx_can_dma(struct spi_master master, struct spi_device spi,
		if (spi_imx->slave_mode)
		return false;

		if (transfer->len < spi_imx->devtype_data->fifo_size)
		return false;

		spi_imx->dynamic_burst = 0;

		return true;