Commit 4bb16672 authored by Jiri Slaby's avatar Jiri Slaby Committed by Greg Kroah-Hartman

build some drivers only when compile-testing

Some drivers can be built on more platforms than they run on. This is
a burden for users and distributors who package a kernel. They have to
manually deselect some (for them useless) drivers when updating their
configs via oldconfig. And yet, sometimes it is even impossible to
disable the drivers without patching the kernel.

Introduce a new config option COMPILE_TEST and make all those drivers
to depend on the platform they run on, or on the COMPILE_TEST option.
Now, when users/distributors choose COMPILE_TEST=n they will not have
the drivers in their allmodconfig setups, but developers still can
compile-test them with COMPILE_TEST=y.

Now the drivers where we use this new option:
* PTP_1588_CLOCK_PCH: The PCH EG20T is only compatible with Intel Atom
  processors so it should depend on x86.
* FB_GEODE: Geode is 32-bit only so only enable it for X86_32.
* USB_CHIPIDEA_IMX: The OF_DEVICE dependency will be met on powerpc
  systems -- which do not actually support the hardware via that
* INTEL_MID_PTI: It is specific to the Penwell type of Intel Atom

* remove EXPERT dependency

[gregkh - remove chipidea portion, as it's incorrect, and also doesn't
 apply to my driver-core tree]
Signed-off-by: default avatarJiri Slaby <>
Cc: Andrew Morton <>
Cc: Linus Torvalds <>
Cc: Jeff Mahoney <>
Cc: Alexander Shishkin <>
Cc: Florian Tobias Schandinat <>
Cc: Richard Cochran <>
Cc: Ben Hutchings <>
Cc: "Keller, Jacob E" <>
Signed-off-by: default avatarGreg Kroah-Hartman <>
parent b5aef682
......@@ -135,7 +135,7 @@ config PHANTOM
tristate "Parallel Trace Interface for MIPI P1149.7 cJTAG standard"
depends on PCI && TTY
depends on PCI && TTY && (X86_INTEL_MID || COMPILE_TEST)
default n
The PTI (Parallel Trace Interface) driver directs
......@@ -72,6 +72,7 @@ config DP83640_PHY
config PTP_1588_CLOCK_PCH
tristate "Intel PCH EG20T as PTP clock"
depends on X86 || COMPILE_TEST
select PTP_1588_CLOCK
This driver adds support for using the PCH EG20T as a PTP
......@@ -3,7 +3,7 @@
config FB_GEODE
bool "AMD Geode family framebuffer support"
depends on FB && PCI && X86
depends on FB && PCI && (X86_32 || (X86 && COMPILE_TEST))
Say 'Y' here to allow you to select framebuffer drivers for
the AMD Geode family of processors.
......@@ -53,6 +53,20 @@ config CROSS_COMPILE
need to set this unless you want the configured kernel build
directory to select the cross-compiler automatically.
bool "Compile also drivers which will not load"
default n
Some drivers can be compiled on a different platform than they are
intended to be run on. Despite they cannot be loaded there (or even
when they load they cannot be used due to missing HW support),
developers still, opposing to distributors, might want to build such
drivers to compile-test them.
If you are a developer and want to build everything available, say Y
here. If you are a user/distributor, say N here to exclude useless
drivers to be distributed.
string "Local version - append to kernel release"
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