Unverified Commit c0b07605 authored by Fredrik Ternerot's avatar Fredrik Ternerot Committed by Mark Brown
Browse files

spi: pl022: Handle cs_change for last transfer 



Do not deselect cs when cs_change is set for the last transfer in the
message. In this case, cs_change indicates that cs should stay selected
until the next transfer.

Signed-off-by: default avatarFredrik Ternerot <fredrikt@axis.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 82391856

drivers/spi/spi-pl022.c

+7 −7
Original line number Diff line number Diff line
@@ -861,11 +861,10 @@ static void dma_callback(void *data) 


	/* Update total bytes transferred */

	msg->actual_length += pl022->cur_transfer->len;

	if (pl022->cur_transfer->cs_change)

		pl022_cs_control(pl022, SSP_CHIP_DESELECT);



	/* Move to next transfer */

	msg->state = next_transfer(pl022);

	if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change)

		pl022_cs_control(pl022, SSP_CHIP_DESELECT);

	tasklet_schedule(&pl022->pump_transfers);

}
@@ -1333,10 +1332,10 @@ static irqreturn_t pl022_interrupt_handler(int irq, void *dev_id) 
		}

		/* Update total bytes transferred */

		msg->actual_length += pl022->cur_transfer->len;

		if (pl022->cur_transfer->cs_change)

			pl022_cs_control(pl022, SSP_CHIP_DESELECT);

		/* Move to next transfer */

		msg->state = next_transfer(pl022);

		if (msg->state != STATE_DONE && pl022->cur_transfer->cs_change)

			pl022_cs_control(pl022, SSP_CHIP_DESELECT);

		tasklet_schedule(&pl022->pump_transfers);

		return IRQ_HANDLED;

	}
@@ -1544,10 +1543,11 @@ static void do_polling_transfer(struct pl022 *pl022) 


		/* Update total byte transferred */

		message->actual_length += pl022->cur_transfer->len;

		if (pl022->cur_transfer->cs_change)

			pl022_cs_control(pl022, SSP_CHIP_DESELECT);

		/* Move to next transfer */

		message->state = next_transfer(pl022);

		if (message->state != STATE_DONE

		    && pl022->cur_transfer->cs_change)

			pl022_cs_control(pl022, SSP_CHIP_DESELECT);

	}

out:

	/* Handle end of message */

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