path: root/arch/powerpc/include/asm
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authorMeador Inge <meador_inge@mentor.com>2011-03-14 10:01:05 +0000
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2011-03-21 11:00:52 +1100
commita99eff39c0549fe68fed150d39ec0c750e5ce1f1 (patch)
treec440adc8e49aea4bed8b666858eaeaf74a91040e /arch/powerpc/include/asm
parent90407c9976939e061f32b0e07602e5ce4887d9e8 (diff)
powerpc: Document the Open PIC device tree binding
This binding documents several properties that have been in use for quite some time, and adds one new property 'pic-no-reset', which controls the runtime initialization behavior of the PIC. More specifically, the presence of 'pic-no-reset' mandates that the PIC shall not be reset during runtime initialization and that any initialization related to interrupt sources shall be limited to sources explicitly referenced in the device tree. This functionality is useful in AMP systems where multiple OSes are sharing the PIC and the reinitialization of the PIC can interfere with OSes that are already up and running. The interrupt specifier definition is based off of Stuart Yoder's FSL MPIC binding. Signed-off-by: Meador Inge <meador_inge@mentor.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Stuart Yoder <stuart.yoder@freescale.com> Cc: Hollis Blanchard <hollis_blanchard@mentor.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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