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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: Fredrik Ternerot <fredrikt@axis.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Fredrik Ternerot 2018-11-13 13:46:32 +01:00 committed by Mark Brown
parent 8239185619
commit c0b07605f1
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GPG Key ID: 24D68B725D5487D0
1 changed files with 7 additions and 7 deletions
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14
drivers/spi/spi-pl022.c
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@ -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 */