From 5b342c5ab7cde6c543faf46e30bb501feaa2e435 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Wed, 18 Mar 2020 02:16:00 +0200 Subject: 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 Tested-by: Michael Walle Link: https://lore.kernel.org/r/20200318001603.9650-10-olteanv@gmail.com Signed-off-by: Mark Brown --- drivers/spi/spi-fsl-dspi.c | 55 ++++++++++++++++++++++++---------------------- 1 file changed, 29 insertions(+), 26 deletions(-) (limited to 'drivers/spi') 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) { -- cgit v1.2.3