spi: atmel: add tracing to custom .transfer_one_message callback

Driver specific implementations for .transfer_one_message need to call
the tracing stuff themself. This is necessary to make spi tracing
actually useful.
Signed-off-by: Uwe Kleine-König <uwe@kleine-koenig.org>
Link: https://lore.kernel.org/r/20190801204710.27309-1-uwe@kleine-koenig.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-atmel.c

@@ -23,6 +23,7 @@
 #include <linux/gpio/consumer.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/pm_runtime.h>
+#include <trace/events/spi.h>
 
 /* SPI register offsets */
 #define SPI_CR					0x0000
@@ -1409,9 +1410,13 @@ static int atmel_spi_transfer_one_message(struct spi_master *master,
 	msg->actual_length = 0;
 
 	list_for_each_entry(xfer, &msg->transfers, transfer_list) {
+		trace_spi_transfer_start(msg, xfer);
+
 		ret = atmel_spi_one_transfer(master, msg, xfer);
 		if (ret)
 			goto msg_done;
+
+		trace_spi_transfer_stop(msg, xfer);
 	}
 
 	if (as->use_pdc)