spi: bcm2835: enable shared interrupt support

Add shared interrupt support for this driver.

Signed-off-by: Martin Sperl <kernel@martin.sperl.org>

diff --git a/drivers/spi/spi-bcm2835.c b/drivers/spi/spi-bcm2835.c
index e5c5146..c2e7a2d 100644 (file)
--- a/drivers/spi/spi-bcm2835.c
+++ b/drivers/spi/spi-bcm2835.c
@@ -379,6 +379,10 @@ static irqreturn_t bcm2835_spi_interrupt(int irq, void *dev_id)
        if (bs->tx_len && cs & BCM2835_SPI_CS_DONE)
                bcm2835_wr_fifo_blind(bs, BCM2835_SPI_FIFO_SIZE);
 
+       /* check if we got interrupt enabled */
+       if (!(bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_INTR))
+               return IRQ_NONE;
+
        /* Read as many bytes as possible from FIFO */
        bcm2835_rd_fifo(bs);
        /* Write as many bytes as possible to FIFO */
@@ -1335,7 +1339,8 @@ static int bcm2835_spi_probe(struct platform_device *pdev)
        bcm2835_wr(bs, BCM2835_SPI_CS,
                   BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX);
 
-       err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0,
+       err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt,
+                              IRQF_SHARED,
                               dev_name(&pdev->dev), ctlr);
        if (err) {
                dev_err(&pdev->dev, "could not request IRQ: %d\n", err);