On Tue, 24 Jun 2014, Daniel Thompson wrote: > Modern ARM systems require an EOI to be sent to the interrupt controller > on completion of both IRQ and FIQ. The FIQ code currently does not provide > any API to perform this. This patch provides this API, implemented by > adding a callback to the fiq_chip structure. > > Signed-off-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx> > Cc: Russell King <linux@xxxxxxxxxxxxxxxx> > Cc: Fabio Estevam <festevam@xxxxxxxxx> > Cc: Nicolas Pitre <nico@xxxxxxxxxx> Acked-by: Nicolas Pitre <nico@xxxxxxxxxx> > --- > arch/arm/include/asm/fiq.h | 6 ++++++ > arch/arm/kernel/fiq.c | 9 +++++++++ > 2 files changed, 15 insertions(+) > > diff --git a/arch/arm/include/asm/fiq.h b/arch/arm/include/asm/fiq.h > index a7806ef..e5d9458 100644 > --- a/arch/arm/include/asm/fiq.h > +++ b/arch/arm/include/asm/fiq.h > @@ -21,6 +21,11 @@ > struct fiq_chip { > void (*fiq_enable)(struct irq_data *data); > void (*fiq_disable)(struct irq_data *data); > + > + /* .fiq_eoi() will be called from the FIQ handler. For this > + * reason it must not use spin locks (or any other locks). > + */ > + void (*fiq_eoi)(struct irq_data *data); > }; > > struct fiq_handler { > @@ -43,6 +48,7 @@ extern void release_fiq(struct fiq_handler *f); > extern void set_fiq_handler(void *start, unsigned int length); > extern void enable_fiq(int fiq); > extern void disable_fiq(int fiq); > +extern void eoi_fiq(int fiq); > extern bool has_fiq(int fiq); > extern void fiq_register_mapping(int irq, struct fiq_chip *chip); > > diff --git a/arch/arm/kernel/fiq.c b/arch/arm/kernel/fiq.c > index 567f8fd..edde332 100644 > --- a/arch/arm/kernel/fiq.c > +++ b/arch/arm/kernel/fiq.c > @@ -183,6 +183,15 @@ void disable_fiq(int fiq) > disable_irq(fiq + fiq_start); > } > > +void eoi_fiq(int fiq) > +{ > + struct fiq_data *data = lookup_fiq_data(fiq); > + > + if (data && data->fiq_chip->fiq_eoi) > + data->fiq_chip->fiq_eoi(data->irq_data); > +} > +EXPORT_SYMBOL(eoi_fiq); > + > bool has_fiq(int fiq) > { > struct fiq_data *data = lookup_fiq_data(fiq); > -- > 1.9.3 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/