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 <[email protected]> --- 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
