We intend to share this interrupt with the OTG driver an to ensure
that irqflags match for the shared interrupt handlers we use
request_threaded_irq()
If we don't use request_treaded_irq() then forced threaded irq will
set IRQF_ONESHOT and this won't match with the OTG IRQ handler's
IRQ flags.
NOTE: OTG IRQ handler is yet to be added. This is a preparatory step.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
drivers/usb/dwc3/dwc3-omap.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 59ea35f..6504e94 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -272,16 +272,22 @@ static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
{
struct dwc3_omap *omap = _omap;
u32 reg;
+ int ret = IRQ_NONE;
reg = dwc3_omap_read_irqmisc_status(omap);
+ if (reg)
+ ret = IRQ_HANDLED;
+
dwc3_omap_write_irqmisc_status(omap, reg);
reg = dwc3_omap_read_irq0_status(omap);
+ if (reg)
+ ret = IRQ_HANDLED;
dwc3_omap_write_irq0_status(omap, reg);
- return IRQ_HANDLED;
+ return ret;
}
static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
@@ -497,8 +503,8 @@ static int dwc3_omap_probe(struct platform_device *pdev)
/* check the DMA Status */
reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
- ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0,
- "dwc3-omap", omap);
+ ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
+ NULL, 0, "dwc3-omap", omap);
if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
--
2.7.4
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