[PATCH v3 1/4] spi: support spi without dma channel to use can_dma()
From: Leilk Liu <hidden>
Date: 2015-07-23 09:11:22
Also in:
linux-devicetree, linux-mediatek, linux-spi, lkml
Subsystem:
spi subsystem, the rest · Maintainers:
Mark Brown, Linus Torvalds
For spi without dma channel and use can_dma(), it can use master->dev for struct device. Change-Id: I5b320e1742767c2ea4368410fb49c6679e28af6b Signed-off-by: Leilk Liu <redacted> --- drivers/spi/spi.c | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index cf8b91b..f725085 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c@@ -539,8 +539,15 @@ static int __spi_map_msg(struct spi_master *master, struct spi_message *msg) if (!master->can_dma) return 0; - tx_dev = master->dma_tx->device->dev; - rx_dev = master->dma_rx->device->dev; + if (master->dma_tx) + 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) { 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) return 0; - tx_dev = master->dma_tx->device->dev; - rx_dev = master->dma_rx->device->dev; + if (master->dma_tx) + 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) { if (!master->can_dma(master, msg->spi, xfer))
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1.8.1.1.dirty