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authorPaul Mundt <lethal@linux-sh.org>2010-09-23 20:09:38 +0900
committerPaul Mundt <lethal@linux-sh.org>2010-10-05 01:15:47 +0900
commit44629f57accccbb8e6d443246fe6f51b42f7f781 (patch)
treeb75bab4a39a2be40f58a9d6daac4a208035300fe /drivers/sh/Kconfig
parente8184a47c9cc04380553114815356d1042a27788 (diff)
downloadblackbird-op-linux-44629f57accccbb8e6d443246fe6f51b42f7f781.tar.gz
blackbird-op-linux-44629f57accccbb8e6d443246fe6f51b42f7f781.zip
sh: intc: Implement reverse mapping for IRQs to per-controller IDs.
This implements a scheme roughly analogous to the PowerPC virtual to hardware IRQ mapping, which we use for IRQ to per-controller ID mapping. This makes it possible for drivers to use the IDs directly for lookup instead of hardcoding the vector. The main motivation for this work is as a building block for dynamically allocating virtual IRQs for demuxing INTC events sharing a single INTEVT in addition to a common masking source. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/sh/Kconfig')
-rw-r--r--drivers/sh/Kconfig9
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/sh/Kconfig b/drivers/sh/Kconfig
index 1dc8b7ae35fb..e01ae42774af 100644
--- a/drivers/sh/Kconfig
+++ b/drivers/sh/Kconfig
@@ -22,3 +22,12 @@ config INTC_BALANCING
vectors.
If in doubt, say N.
+
+config INTC_MAPPING_DEBUG
+ bool "Expose IRQ to per-controller id mapping via debugfs"
+ depends on DEBUG_FS
+ help
+ This will create a debugfs entry for showing the relationship
+ between system IRQs and the per-controller id tables.
+
+ If in doubt, say N.
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