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spi: atmel: Exposing effective spi speed

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This patch implements the reporting of the effectively used speed_hz for
the transfer by setting xfer->effective_speed_hz.

See the following patch, which adds this feature to the SPI core for more
information:
commit 5d7e2b5ed5 ("spi: core: allow reporting the effectivly used speed_hz for a transfer")

Signed-off-by: Thomas Kopp <thomas.kopp@microchip.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200921071036.2091-1-thomas.kopp@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Thomas Kopp 2020-09-21 09:10:36 +02:00 committed by Mark Brown
parent 9d36215250
commit 23f370c748
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1 changed files with 1 additions and 0 deletions
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drivers/spi/spi-atmel.c
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@ -858,6 +858,7 @@ static int atmel_spi_set_xfer_speed(struct atmel_spi *as,
csr = spi_readl(as, CSR0 + 4 * chip_select);
csr = SPI_BFINS(SCBR, scbr, csr);
spi_writel(as, CSR0 + 4 * chip_select, csr);
xfer->effective_speed_hz = bus_hz / scbr;
return 0;
}