[OpenWrt-Devel] [PATCH] ath79: reduce irq count in irq-ath79-misc.c

[Chuanhong Guo]

Hi!
Dmitry Tunin <hanipouspilot at gmail.com> 于2018年8月22日周三 下午8:31写道：
>
> We probably need to add a SoC check there. Otherwise we'll have two 32
> IRQ domains when using it with PCI.
But this doesn't matter at all :)
> I guess older ones have 8 IRQs and newer ones - 16. We cal leave
> default of 32 for unknown SoCs if there are any.
> ср, 22 авг. 2018 г. в 13:59, Dmitry Tunin <hanipouspilot at gmail.com>:
> >
> > Oops. I looked into newer specs. Some chips now have 16.
> > ср, 22 авг. 2018 г. в 13:50, Dmitry Tunin <hanipouspilot at gmail.com>:
> > >
> > > According to specs this interrupt controller has 8 IRQs (0-7).
> > > If we reuse it for PCI, we need even less (0-4).
> > > We don't need that hude domain there.
> > >
> > > Signed-off-by: Dmitry Tunin <hanipouspilot at gmail.com>
> > > ---
> > >  .../0037-MIPS-ath79-irq-misc-reduce-irq-count.patch         | 13 +++++++++++++
> > >  1 file changed, 13 insertions(+)
> > >  create mode 100644 target/linux/ath79/patches-4.14/0037-MIPS-ath79-irq-misc-reduce-irq-count.patch
> > >
> > > diff --git a/target/linux/ath79/patches-4.14/0037-MIPS-ath79-irq-misc-reduce-irq-count.patch b/target/linux/ath79/patches-4.14/0037-MIPS-ath79-irq-misc-reduce-irq-count.patch
> > > new file mode 100644
> > > index 0000000..b9ab092
> > > --- /dev/null
> > > +++ b/target/linux/ath79/patches-4.14/0037-MIPS-ath79-irq-misc-reduce-irq-count.patch
> > > @@ -0,0 +1,13 @@
> > > +Index: linux-4.14.65/drivers/irqchip/irq-ath79-misc.c
> > > +===================================================================
> > > +--- linux-4.14.65.orig/drivers/irqchip/irq-ath79-misc.c
> > > ++++ linux-4.14.65/drivers/irqchip/irq-ath79-misc.c
> > > +@@ -21,7 +21,7 @@
> > > + #define AR71XX_RESET_REG_MISC_INT_STATUS      0
> > > + #define AR71XX_RESET_REG_MISC_INT_ENABLE      4
> > > +
> > > +-#define ATH79_MISC_IRQ_COUNT                  32
> > > ++#define AR71XX_MISC_IRQ_COUNT                 8
> > > +
> > > + static void ath79_misc_irq_handler(struct irq_desc *desc)
> > > + {
> > > --
> > > 2.7.4
> > >
>
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