From: David E. Box Date: Wed, 27 Aug 2014 21:40:39 +0000 (-0700) Subject: x86/iosf: Add Kconfig prompt for IOSF_MBI selection X-Git-Tag: firefly_0821_release~176^2~3049^2~9 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aa8e4f22ab7773352ba3895597189b8097f2c307;p=firefly-linux-kernel-4.4.55.git x86/iosf: Add Kconfig prompt for IOSF_MBI selection Fixes an error in having the iosf build as 'default m'. On X86 SoC's the iosf sideband is the only way to access information for some registers, as opposed to through MSR's on other Intel architectures. While selecting IOSF_MBI is preferred, it does mean carrying extra code on non-SoC architectures. This exports the selection to the user, allowing those driver writers to compile out iosf code if it's not being built. Signed-off-by: David E. Box Link: http://lkml.kernel.org/r/1409175640-32426-2-git-send-email-david.e.box@linux.intel.com Signed-off-by: H. Peter Anvin --- diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 5d0bf1aa9dcb..a99988f991ed 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2433,9 +2433,19 @@ config X86_DMA_REMAP depends on STA2X11 config IOSF_MBI - tristate - default m + tristate "Intel System On Chip IOSF Sideband support" depends on PCI + ---help--- + Enables sideband access to mailbox registers on SoC's. The sideband is + available on the following platforms. This list is not meant to be + exclusive. + - BayTrail + - Cherryview + - Braswell + - Quark + + You should say Y if you are running a kernel on one of these + platforms. config PMC_ATOM def_bool y