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Commit cbcc062a authored by Yong Wang's avatar Yong Wang Committed by Grant Likely
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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: default avatarYong Wang <yong.y.wang@intel.com>
Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
parent 9d8f86b5

drivers/spi/dw_spi.c

+6 −1
Original line number Diff line number Diff line
@@ -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");