linux-toradex.git/arch/powerpc/include/asm/scom.h, branch v3.17 Linux kernel for Apalis and Colibri modules powerpc/scom: Enable 64-bit addresses 2013-11-06T03:13:49+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2013-10-10T08:18:02+00:00 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> 
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 errors 2013-10-11T05:53:34+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2013-08-29T06:55:45+00:00 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> 
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 infrastructure 2011-04-20T07:01:19+00:00 Benjamin Herrenschmidt benh@kernel.crashing.org 2011-04-14T22:31:58+00:00 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> 
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>