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spi: support spi without dma channel to use can_dma()

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For spi without dma channel and use can_dma(), it can
use master->dev for struct device.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Leilk Liu 2015-07-23 17:10:40 +08:00 committed by Mark Brown
parent bc0195aad0
commit c37f45b5f1
1 changed files with 18 additions and 4 deletions
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22
drivers/spi/spi.c
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@ -539,8 +539,15 @@ static int __spi_map_msg(struct spi_master *master, struct spi_message *msg)
if (!master->can_dma) if (!master->can_dma)
return 0; return 0;
tx_dev = master->dma_tx->device->dev; if (master->dma_tx)
rx_dev = master->dma_rx->device->dev; tx_dev = master->dma_tx->device->dev;
else
tx_dev = &master->dev;
if (master->dma_rx)
rx_dev = master->dma_rx->device->dev;
else
rx_dev = &master->dev;
list_for_each_entry(xfer, &msg->transfers, transfer_list) { list_for_each_entry(xfer, &msg->transfers, transfer_list) {
if (!master->can_dma(master, msg->spi, xfer)) if (!master->can_dma(master, msg->spi, xfer))
@ -579,8 +586,15 @@ static int __spi_unmap_msg(struct spi_master *master, struct spi_message *msg)
if (!master->cur_msg_mapped || !master->can_dma) if (!master->cur_msg_mapped || !master->can_dma)
return 0; return 0;
tx_dev = master->dma_tx->device->dev; if (master->dma_tx)
rx_dev = master->dma_rx->device->dev; tx_dev = master->dma_tx->device->dev;
else
tx_dev = &master->dev;
if (master->dma_rx)
rx_dev = master->dma_rx->device->dev;
else
rx_dev = &master->dev;
list_for_each_entry(xfer, &msg->transfers, transfer_list) { list_for_each_entry(xfer, &msg->transfers, transfer_list) {
if (!master->can_dma(master, msg->spi, xfer)) if (!master->can_dma(master, msg->spi, xfer))