Commit 49cbb1e0 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior
Browse files

spi/pxa2xx: add support for shared IRQ handler 



This is required in case the interrupt line is shared with other
devices.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarDirk Brandewie <dirk.brandewie@gmail.com>
parent fbd29a14

drivers/spi/pxa2xx_spi.c

+14 −1
Original line number Diff line number Diff line
@@ -742,6 +742,18 @@ static irqreturn_t ssp_int(int irq, void *dev_id) 
{

	struct driver_data *drv_data = dev_id;

	void __iomem *reg = drv_data->ioaddr;

	u32 sccr1_reg = read_SSCR1(reg);

	u32 mask = drv_data->mask_sr;

	u32 status;



	status = read_SSSR(reg);



	/* Ignore possible writes if we don't need to write */

	if (!(sccr1_reg & SSCR1_TIE))

		mask &= ~SSSR_TFS;



	if (!(status & mask))

		return IRQ_NONE;



	if (!drv_data->cur_msg) {
@@ -1512,7 +1524,8 @@ static int __devinit pxa2xx_spi_probe(struct platform_device *pdev) 
		drv_data->mask_sr = SSSR_TINT | SSSR_RFS | SSSR_TFS | SSSR_ROR;

	}



	status = request_irq(ssp->irq, ssp_int, 0, dev_name(dev), drv_data);

	status = request_irq(ssp->irq, ssp_int, IRQF_SHARED, dev_name(dev),

			drv_data);

	if (status < 0) {

		dev_err(&pdev->dev, "cannot get IRQ %d\n", ssp->irq);

		goto out_error_master_alloc;