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path: root/arch/powerpc/platforms/powernv/opal-xscom.c
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2014-02-28powerpc/powernv: Fix indirect XSCOM unmanglingBenjamin Herrenschmidt1-9/+12
We need to unmangle the full address, not just the register number, and we also need to support the real indirect bit being set for in-kernel uses. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> CC: <stable@vger.kernel.org> [v3.13]
2013-12-13powerpc/powernv: Fix endian issue in opal_xscom_readAnton Blanchard1-1/+3
opal_xscom_read uses a pointer to return the data so we need to byteswap it on LE builds. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-06powerpc/powernv: Add support for indirect XSCOM via debugfsBenjamin Herrenschmidt1-0/+23
Indirect XSCOM addresses normally have the top bit set (of the 64-bit address). This doesn't work via the normal debugfs interface, so we use a different encoding, which we need to convert before calling OPAL. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-11-06powerpc/scom: Enable 64-bit addressesBenjamin Herrenschmidt1-3/+3
On P8, XSCOM addresses has a special "indirect" form that requires more than 32-bits, so let's use u64 everywhere in the code instead of u32. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2013-10-11powerpc/powernv: Add scom support under OPALv3Benjamin Herrenschmidt1-0/+105
OPAL v3 provides interfaces to access the chips XSCOM, expose this via the existing scom infrastructure. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>