Messages in this thread | | | Date | Thu, 9 Aug 2012 14:09:51 +0200 | From | "Arend van Spriel" <> | Subject | Re: How to get the irq flags from the dts file |
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On 08/09/2012 12:43 PM, Wei Ni wrote: > Hi, all > I'm working on tegra wlan upstream issue. > The tegra board use the Broadcom 4329 as wlan device, and the driver is > the brcmfmac. > > This wlan driver support out-band-interrupt (OOB), I want to add DT > support to use this OOB. > I can add following lines in the dts file to create platform device and > pass the interrupt resource to the driver. > > wlan { > compatible = "broadcome, brcmf_sdio_pd";
I don't know the DT syntax, but I assume broadcome should be broadcom, right? ;-)
> interrupt-parten = <&gpio>; > interrupts = <144, 0x04>; /* IRQF_TRIGGER_HIGH */ > }; > > In the wlan driver, it will use platform_get_resource() to get the > res->irq, res->flags, the irq number is right, but the flags will be > IORESOURCE_IRQ, not the 0x04 (IRQF_TRIGGER_HIGH). > The wlan driver wish this flags include the IRQF_TRGGER_* information, > and it will use this flags to configure other hw settings. If it is > wrong, the wlan can't work. > > I checked drivers/of/irq.c, in function of_irq_to_resource(), it will > set r->flags = IORESOURCE_IRQ directly, not read the flags from the dtb > file. And I didn't find any of_xx api to get this flags. > > How can I get this flags, does anyone has suggestion?
I did a quick search in the kernel and there are a number of platform drivers that seem to expect the IRQF_TRIGGER_* info by using (res->flags & IRQF_TRIGGER_MASK) and to determine IRQF_SHARED as well.
Gr. AvS
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