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| Started by | Holger Schurig <holgerschurig@gmail.com> |
|---|---|
| First post | 2015-07-07 12:10 +0200 |
| Last post | 2015-07-07 12:10 +0200 |
| Articles | 1 — 1 participant |
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Re: [PATCH 4.2-rc1 v21 3/6] irqchip: gic: Introduce plumbing for IPI FIQ Holger Schurig <holgerschurig@gmail.com> - 2015-07-07 12:10 +0200
| From | Holger Schurig <holgerschurig@gmail.com> |
|---|---|
| Date | 2015-07-07 12:10 +0200 |
| Subject | Re: [PATCH 4.2-rc1 v21 3/6] irqchip: gic: Introduce plumbing for IPI FIQ |
| Message-ID | <pJxZ8-4kL-17@gated-at.bofh.it> |
> Currently it is not possible to exploit FIQ for systems with a GIC, even > on systems are otherwise capable of it. This patch makes it possible > for IPIs to be delivered using FIQ. I wonder if gic_set_group_irq() can easily be married with mxc_set_irq_fiq(). The driver sound/soc/fsl/imx-pcm-fiq.c uses mxc_set_irq_fiq() to connect an (assembly) FIQ handler with a hardware IRQ. However, the underlying implementation of mxc_set_irq_fiq() is only supported for TZIC and AVIC (see arch/arm/mach-imx/irq-common.c). On my i.MX6, which doesn't have an AVIC/TZIC but a GIC I could use a method to turn a normal IRQ into a FIQ :-) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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