3 Commits

Author	SHA1	Message	Date
Benjamin Herrenschmidt	d7a88c7eb4	powerpc/scom: Enable 64-bit addresses ... 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>	2013-11-06 14:13:49 +11:00
Benjamin Herrenschmidt	aaa63093dd	powerpc/scom: Change scom_read() and scom_write() to return errors ... 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>	2013-10-11 16:53:34 +11:00
Benjamin Herrenschmidt	ab814b938d	powerpc: Add SCOM infrastructure ... 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>	2011-04-20 17:01:19 +10:00