[POWERPC] Add workaround for MPICs with broken register reads

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Some versions of PWRficient 1682M have an interrupt controller in which
the first register in each pair for interrupt sources doesn't always
read with the right polarity/sense values.

To work around this, keep a software copy of the register instead.  Since
it's not modified from the mpic itself, it's a feasible solution.  Still,
keep it under a config option to avoid wasting memory on other platforms.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>

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Olof Johansson 2007-09-08 05:13:19 +10:00 • committed by Paul Mackerras

parent 2099172d61

commit 0d72ba930c

4 changed files with 27 additions and 2 deletions

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10

arch/powerpc/platforms/Kconfig

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1

arch/powerpc/platforms/pasemi/Kconfig

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14

arch/powerpc/sysdev/mpic.c

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4

include/asm-powerpc/mpic.h

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