diff options
| author | Viresh Kumar <viresh.kumar@st.com> | 2011-05-16 06:10:10 +0200 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-05-20 08:43:07 +0200 |
| commit | 43c640157d4366a3ea9ba01f903ea892f46376ee (patch) | |
| tree | 810fde5e02141f59575305e3fa1606b0a57e6d5f /drivers/spi | |
| parent | spi/spi_s3c24xx: Use spi_bitbang_stop instead of spi_unregister_master in s3c... (diff) | |
| download | linux-43c640157d4366a3ea9ba01f903ea892f46376ee.tar.xz linux-43c640157d4366a3ea9ba01f903ea892f46376ee.zip | |
spi/amba-pl022: work in polling or interrupt mode if pl022_dma_probe fails
If pl022_dma_probe fails, we can try to transfer data in polling or interrupt
mode. Also, set platform_info->enable_dma to 0, so that no other code tries to
use dma.
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/amba-pl022.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/spi/amba-pl022.c b/drivers/spi/amba-pl022.c index 8a2b88aee373..6a9e58dd36c7 100644 --- a/drivers/spi/amba-pl022.c +++ b/drivers/spi/amba-pl022.c @@ -1060,7 +1060,7 @@ static int __init pl022_dma_probe(struct pl022 *pl022) pl022->master_info->dma_filter, pl022->master_info->dma_rx_param); if (!pl022->dma_rx_channel) { - dev_err(&pl022->adev->dev, "no RX DMA channel!\n"); + dev_dbg(&pl022->adev->dev, "no RX DMA channel!\n"); goto err_no_rxchan; } @@ -1068,13 +1068,13 @@ static int __init pl022_dma_probe(struct pl022 *pl022) pl022->master_info->dma_filter, pl022->master_info->dma_tx_param); if (!pl022->dma_tx_channel) { - dev_err(&pl022->adev->dev, "no TX DMA channel!\n"); + dev_dbg(&pl022->adev->dev, "no TX DMA channel!\n"); goto err_no_txchan; } pl022->dummypage = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!pl022->dummypage) { - dev_err(&pl022->adev->dev, "no DMA dummypage!\n"); + dev_dbg(&pl022->adev->dev, "no DMA dummypage!\n"); goto err_no_dummypage; } @@ -1090,6 +1090,8 @@ err_no_txchan: dma_release_channel(pl022->dma_rx_channel); pl022->dma_rx_channel = NULL; err_no_rxchan: + dev_err(&pl022->adev->dev, + "Failed to work in dma mode, work without dma!\n"); return -ENODEV; } @@ -2115,7 +2117,7 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) if (platform_info->enable_dma) { status = pl022_dma_probe(pl022); if (status != 0) - goto err_no_dma; + platform_info->enable_dma = 0; } /* Initialize and start queue */ @@ -2151,7 +2153,6 @@ pl022_probe(struct amba_device *adev, const struct amba_id *id) err_init_queue: destroy_queue(pl022); pl022_dma_remove(pl022); - err_no_dma: free_irq(adev->irq[0], pl022); err_no_irq: clk_put(pl022->clk); |