It allocates some RAM I guess.
ср, 22 авг. 2018 г. в 15:34, Chuanhong Guo <gch981...@gmail.com>:
>
> Hi!
> Dmitry Tunin <hanipouspi...@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 <hanipouspi...@gmail.com>:
> > >
> > > Oops. I looked into newer specs. Some chips now have 16.
> > > ср, 22 авг. 2018 г. в 13:50, Dmitry Tunin <hanipouspi...@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 <hanipouspi...@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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> > openwrt-devel@lists.openwrt.org
> > https://lists.openwrt.org/mailman/listinfo/openwrt-devel
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