summaryrefslogtreecommitdiff
path: root/drivers/spi
diff options
context:
space:
mode:
authorVladimir Oltean <vladimir.oltean@nxp.com>2020-03-18 02:16:00 +0200
committerMark Brown <broonie@kernel.org>2020-03-18 22:45:00 +0000
commit5b342c5ab7cde6c543faf46e30bb501feaa2e435 (patch)
tree5c90efffcbf10fbc74cdfe2f226fa62681d5914a /drivers/spi
parent826b3a6a34619b934cdc33eeb961fcb99ce92c09 (diff)
spi: spi-fsl-dspi: Move invariant configs out of dspi_transfer_one_message
The operating mode (DMA, XSPI, EOQ) is not going to change across the lifetime of the device. So it makes no sense to keep writing to SPI_RSER on each message. Move this configuration to dspi_init instead. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Tested-by: Michael Walle <michael@walle.cc> Link: https://lore.kernel.org/r/20200318001603.9650-10-olteanv@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-fsl-dspi.c55
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index fcc6f20b6631..5873752a091e 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -900,7 +900,6 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
{
struct fsl_dspi *dspi = spi_controller_get_devdata(ctlr);
struct spi_device *spi = message->spi;
- enum dspi_trans_mode trans_mode;
struct spi_transfer *transfer;
int status = 0;
@@ -942,30 +941,11 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
spi_take_timestamp_pre(dspi->ctlr, dspi->cur_transfer,
dspi->progress, !dspi->irq);
- trans_mode = dspi->devtype_data->trans_mode;
- switch (trans_mode) {
- case DSPI_EOQ_MODE:
- regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_EOQFE);
- dspi_fifo_write(dspi);
- break;
- case DSPI_XSPI_MODE:
- regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_CMDTCFE);
- dspi_fifo_write(dspi);
- break;
- case DSPI_DMA_MODE:
- regmap_write(dspi->regmap, SPI_RSER,
- SPI_RSER_TFFFE | SPI_RSER_TFFFD |
- SPI_RSER_RFDFE | SPI_RSER_RFDFD);
+ if (dspi->devtype_data->trans_mode == DSPI_DMA_MODE) {
status = dspi_dma_xfer(dspi);
- break;
- default:
- dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n",
- trans_mode);
- status = -EINVAL;
- goto out;
- }
+ } else {
+ dspi_fifo_write(dspi);
- if (trans_mode != DSPI_DMA_MODE) {
if (dspi->irq) {
wait_for_completion(&dspi->xfer_done);
reinit_completion(&dspi->xfer_done);
@@ -975,11 +955,12 @@ static int dspi_transfer_one_message(struct spi_controller *ctlr,
} while (status == -EINPROGRESS);
}
}
+ if (status)
+ break;
spi_transfer_delay_exec(transfer);
}
-out:
message->status = status;
spi_finalize_current_message(ctlr);
@@ -1170,7 +1151,7 @@ static const struct regmap_config dspi_xspi_regmap_config[] = {
},
};
-static void dspi_init(struct fsl_dspi *dspi)
+static int dspi_init(struct fsl_dspi *dspi)
{
unsigned int mcr;
@@ -1184,6 +1165,26 @@ static void dspi_init(struct fsl_dspi *dspi)
regmap_write(dspi->regmap, SPI_MCR, mcr);
regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR);
+
+ switch (dspi->devtype_data->trans_mode) {
+ case DSPI_EOQ_MODE:
+ regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_EOQFE);
+ break;
+ case DSPI_XSPI_MODE:
+ regmap_write(dspi->regmap, SPI_RSER, SPI_RSER_CMDTCFE);
+ break;
+ case DSPI_DMA_MODE:
+ regmap_write(dspi->regmap, SPI_RSER,
+ SPI_RSER_TFFFE | SPI_RSER_TFFFD |
+ SPI_RSER_RFDFE | SPI_RSER_RFDFD);
+ break;
+ default:
+ dev_err(&dspi->pdev->dev, "unsupported trans_mode %u\n",
+ dspi->devtype_data->trans_mode);
+ return -EINVAL;
+ }
+
+ return 0;
}
static int dspi_slave_abort(struct spi_master *master)
@@ -1339,7 +1340,9 @@ static int dspi_probe(struct platform_device *pdev)
if (ret)
goto out_ctlr_put;
- dspi_init(dspi);
+ ret = dspi_init(dspi);
+ if (ret)
+ goto out_clk_put;
dspi->irq = platform_get_irq(pdev, 0);
if (dspi->irq <= 0) {