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| author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-06 10:03:29 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-11-06 10:03:29 +0100 |
| commit | 70324494b6f283311c5339fb1795fdec2d8850d9 (patch) | |
| tree | 5a318c2b60ba6e7861d630310d1930f62b8893ce /drivers/spi | |
| parent | 73b5301b02c8d3456a5ea64c9ed9802a4a376af6 (diff) | |
| parent | e47a682ace0cd56eb8e09b806c2b0f034b491520 (diff) | |
| download | linux-70324494b6f283311c5339fb1795fdec2d8850d9.tar.gz linux-70324494b6f283311c5339fb1795fdec2d8850d9.tar.bz2 linux-70324494b6f283311c5339fb1795fdec2d8850d9.zip | |
Merge branch 'spi-linus' into spi-next
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-omap2-mcspi.c | 39 |
1 files changed, 19 insertions, 20 deletions
diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 51046332677c..643e7e27aa47 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -324,18 +324,13 @@ static void omap2_mcspi_tx_dma(struct spi_device *spi, struct omap2_mcspi *mcspi; struct omap2_mcspi_dma *mcspi_dma; unsigned int count; - u8 * rx; const u8 * tx; - void __iomem *chstat_reg; - struct omap2_mcspi_cs *cs = spi->controller_state; mcspi = spi_master_get_devdata(spi->master); mcspi_dma = &mcspi->dma_channels[spi->chip_select]; count = xfer->len; - rx = xfer->rx_buf; tx = xfer->tx_buf; - chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0; if (mcspi_dma->dma_tx) { struct dma_async_tx_descriptor *tx; @@ -360,19 +355,6 @@ static void omap2_mcspi_tx_dma(struct spi_device *spi, dma_async_issue_pending(mcspi_dma->dma_tx); omap2_mcspi_set_dma_req(spi, 0, 1); - wait_for_completion(&mcspi_dma->dma_tx_completion); - dma_unmap_single(mcspi->dev, xfer->tx_dma, count, - DMA_TO_DEVICE); - - /* for TX_ONLY mode, be sure all words have shifted out */ - if (rx == NULL) { - if (mcspi_wait_for_reg_bit(chstat_reg, - OMAP2_MCSPI_CHSTAT_TXS) < 0) - dev_err(&spi->dev, "TXS timed out\n"); - else if (mcspi_wait_for_reg_bit(chstat_reg, - OMAP2_MCSPI_CHSTAT_EOT) < 0) - dev_err(&spi->dev, "EOT timed out\n"); - } } static unsigned @@ -493,6 +475,7 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer) struct dma_slave_config cfg; enum dma_slave_buswidth width; unsigned es; + void __iomem *chstat_reg; mcspi = spi_master_get_devdata(spi->master); mcspi_dma = &mcspi->dma_channels[spi->chip_select]; @@ -527,8 +510,24 @@ omap2_mcspi_txrx_dma(struct spi_device *spi, struct spi_transfer *xfer) omap2_mcspi_tx_dma(spi, xfer, cfg); if (rx != NULL) - return omap2_mcspi_rx_dma(spi, xfer, cfg, es); - + count = omap2_mcspi_rx_dma(spi, xfer, cfg, es); + + if (tx != NULL) { + chstat_reg = cs->base + OMAP2_MCSPI_CHSTAT0; + wait_for_completion(&mcspi_dma->dma_tx_completion); + dma_unmap_single(mcspi->dev, xfer->tx_dma, xfer->len, + DMA_TO_DEVICE); + + /* for TX_ONLY mode, be sure all words have shifted out */ + if (rx == NULL) { + if (mcspi_wait_for_reg_bit(chstat_reg, + OMAP2_MCSPI_CHSTAT_TXS) < 0) + dev_err(&spi->dev, "TXS timed out\n"); + else if (mcspi_wait_for_reg_bit(chstat_reg, + OMAP2_MCSPI_CHSTAT_EOT) < 0) + dev_err(&spi->dev, "EOT timed out\n"); + } + } return count; } |