drivers: spi: nrfx_spim: self resume until spi_release()

The nrxf_spim driver currently resumes itself for the duration of
a transfer, however, in case SPI_LOCK_ON is used, the driver needs
to keep itself resumed until spi_release() is called. Currently,
this results in unbalanced suspend as the bus puts itself both
after transaction is done, and when spi_release() is called.

This patch makes the driver check if SPI_LOCK_ON is set once
transaction is complete, if yes, selv get one more time to
account for the two puts which will follow.

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>

Author: bjarki-andreasen

drivers/spi/spi_nrfx_spim.c

@@ -403,6 +403,11 @@ static void finish_transaction(const struct device *dev, int error)
 	spi_context_complete(ctx, dev, error);
 	dev_data->busy = false;
 
+	if (dev_data->ctx.config->operation & SPI_LOCK_ON) {
+		/* Keep device resumed until call to spi_release() */
+		(void)pm_device_runtime_get(dev);
+	}
+
 	finalize_spi_transaction(dev, true);
 }