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| author | Yong Wang <yong.y.wang@linux.intel.com> | 2010-09-07 15:27:27 +0800 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2010-09-08 10:49:50 -0600 |
| commit | cbcc062abb16d39839b3d8d4e3d20360fc21eb58 (patch) | |
| tree | 8ce802ede9dd14760e9426a75c2c95c4ce2b9474 /drivers/spi/dw_spi.c | |
| parent | 9d8f86b56093d7b06d81d4063d5b9a4cbf887e75 (diff) | |
| download | linux-cbcc062abb16d39839b3d8d4e3d20360fc21eb58.tar.bz2 | |
spi/dw_spi: Allow interrupt sharing
Allow interrupt sharing since exclusive interrupt line for
DW SPI controller is not provided on every platform.
Signed-off-by: Yong Wang <yong.y.wang@intel.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/spi/dw_spi.c')
| -rw-r--r-- | drivers/spi/dw_spi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/dw_spi.c b/drivers/spi/dw_spi.c index d256cb00604c..11fbbf6fb07b 100644 --- a/drivers/spi/dw_spi.c +++ b/drivers/spi/dw_spi.c @@ -396,6 +396,11 @@ static irqreturn_t interrupt_transfer(struct dw_spi *dws) static irqreturn_t dw_spi_irq(int irq, void *dev_id) { struct dw_spi *dws = dev_id; + u16 irq_status, irq_mask = 0x3f; + + irq_status = dw_readw(dws, isr) & irq_mask; + if (!irq_status) + return IRQ_NONE; if (!dws->cur_msg) { spi_mask_intr(dws, SPI_INT_TXEI); @@ -883,7 +888,7 @@ int __devinit dw_spi_add_host(struct dw_spi *dws) dws->dma_inited = 0; dws->dma_addr = (dma_addr_t)(dws->paddr + 0x60); - ret = request_irq(dws->irq, dw_spi_irq, 0, + ret = request_irq(dws->irq, dw_spi_irq, IRQF_SHARED, "dw_spi", dws); if (ret < 0) { dev_err(&master->dev, "can not get IRQ\n"); |