spi: atmel: Exposing effective spi speed

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 5d7e2b5ed585 ("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>

diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c
index 7c68d5c..ce5bd06 100644 (file)
--- a/drivers/spi/spi-atmel.c
+++ b/drivers/spi/spi-atmel.c
@@ -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;
 }