Marc Kleine-Budde 7716fa8068 spi: spi-sun6i: sun6i_spi_transfer_one(): enable RF_RDY interrupt only if needed ...

In sun6i_spi_transfer_one() the RX FIFO Ready (SUN6I_INT_CTL_RF_RDY) is
unconditionally enabled.

A RX interrupt is only needed, if more data than fits into the FIFO is going to
be received during this transfer. As the RX-FIFO is drained during transfer
complete interrupt, enable the RX FIFO Ready interrupt only if the data doesn't
fit into the FIFO.

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20200706143443.9855-11-mkl@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>

2020-07-07 10:41:41 +01:00

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