kernel/arch/powerpc/include/asm/scom.h, branch linux-4.3.yHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-4.3.y2013-11-06T03:13:49Zpowerpc/scom: Enable 64-bit addresses2013-11-06T03:13:49ZBenjamin Herrenschmidtbenh@kernel.crashing.org2013-10-10T08:18:02Zurn:sha1:d7a88c7eb46acb486922822eec3224c0bcab29dc
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>
powerpc/scom: Change scom_read() and scom_write() to return errors2013-10-11T05:53:34ZBenjamin Herrenschmidtbenh@kernel.crashing.org2013-08-29T06:55:45Zurn:sha1:aaa63093dd4c393391a3368e1c7305b0cc620571
scom_read() now returns the read value via a pointer argument and
both functions return an int error code
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
powerpc: Add SCOM infrastructure2011-04-20T07:01:19ZBenjamin Herrenschmidtbenh@kernel.crashing.org2011-04-14T22:31:58Zurn:sha1:ab814b938d1d372bd2ac6268c15d4e0e6a5245c4
SCOM is a side-band configuration bus implemented on some processors.
This code provides a way for code to map and operate on devices via
SCOM, while the details of how that is implemented is left up to a
SCOM "controller" in the platform code.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>