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| author | Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> | 2011-09-06 12:16:34 +0400 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-10-04 20:10:50 +0400 |
| commit | 27504be5c10bdc61761ec0126b3645428598ad91 (patch) | |
| tree | 6d1ec938a9bfd9cb80b36f7aefc38aec2f405531 | |
| parent | 387719c2ec995019e0af0dc537ca17c9ebd5b64f (diff) | |
| download | linux-27504be5c10bdc61761ec0126b3645428598ad91.tar.xz | |
spi-topcliff-pch: add tx-memory clear after complete transmitting
Currently, in case of reading date from SPI flash,
command is sent twice.
The cause is that tx-memory clear processing is missing .
This patch adds the tx-momory clear processing.
Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| -rw-r--r-- | drivers/spi/spi-topcliff-pch.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/spi/spi-topcliff-pch.c b/drivers/spi/spi-topcliff-pch.c index 1d23f3831866..7a98caa3aed2 100644 --- a/drivers/spi/spi-topcliff-pch.c +++ b/drivers/spi/spi-topcliff-pch.c @@ -837,6 +837,11 @@ static void pch_spi_start_transfer(struct pch_spi_data *data) dma_sync_sg_for_cpu(&data->master->dev, dma->sg_rx_p, dma->nent, DMA_FROM_DEVICE); + + dma_sync_sg_for_cpu(&data->master->dev, dma->sg_tx_p, dma->nent, + DMA_FROM_DEVICE); + memset(data->dma.tx_buf_virt, 0, PAGE_SIZE); + async_tx_ack(dma->desc_rx); async_tx_ack(dma->desc_tx); kfree(dma->sg_tx_p); |