This is required in case the interrupt line is shared with other
devices.
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brande...@gmail.com>
---
drivers/spi/pxa2xx_spi.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c
index 6f2f061..6d40995 100644
--- a/drivers/spi/pxa2xx_spi.c
+++ b/drivers/spi/pxa2xx_spi.c
@@ -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 __init 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;
--
1.7.3.2
------------------------------------------------------------------------------
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