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authorDavid Brownell <dbrownell@users.sourceforge.net>2008-07-23 21:26:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 10:47:13 -0700
commit9483a578df27fe7603605d565eefe039c1ba5845 (patch)
treee8f071d503b26d23d22556ec5d115cd67a45d47c
parentd7ce20b2024d318b9ba88859226af1441270d99f (diff)
downloadlinux-9483a578df27fe7603605d565eefe039c1ba5845.tar.bz2
add HAVE_CLK to Kconfig, for driver dependencies
Flag platforms as HAVE_CLK (or not) in Kconfig, based on whether they support <linux/clk.h> calls, so that otherwise portable drivers which need those calls can list that dependency. Something like this is a prerequisite for merging the musb_hdrc driver, currently used on platforms including Davinci, OMAP2430, OMAP3xx ... and the discrete TUSB6010 chip, which doesn't have a natural platform dependency. (Used with OMAP 2420 in current Nokia N8x0 tablets.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: Russell King <rmk@arm.linux.org.uk> Acked-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--arch/Kconfig7
-rw-r--r--arch/arm/Kconfig13
-rw-r--r--arch/avr32/Kconfig1
-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/sh/Kconfig1
5 files changed, 23 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index ad89a33d8c6e..4d5ebbc1e72b 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -42,3 +42,10 @@ config HAVE_DMA_ATTRS
config USE_GENERIC_SMP_HELPERS
def_bool n
+
+config HAVE_CLK
+ def_bool n
+ help
+ The <linux/clk.h> calls support software clock gating and
+ thus are a key power management tool on many systems.
+
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index d048f6887d0b..6fb4f03369f2 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -198,12 +198,14 @@ choice
config ARCH_AAEC2000
bool "Agilent AAEC-2000 based"
select ARM_AMBA
+ select HAVE_CLK
help
This enables support for systems based on the Agilent AAEC-2000
config ARCH_INTEGRATOR
bool "ARM Ltd. Integrator family"
select ARM_AMBA
+ select HAVE_CLK
select ICST525
help
Support for ARM's Integrator platform.
@@ -211,6 +213,7 @@ config ARCH_INTEGRATOR
config ARCH_REALVIEW
bool "ARM Ltd. RealView family"
select ARM_AMBA
+ select HAVE_CLK
select ICST307
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
@@ -221,6 +224,7 @@ config ARCH_VERSATILE
bool "ARM Ltd. Versatile family"
select ARM_AMBA
select ARM_VIC
+ select HAVE_CLK
select ICST307
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
@@ -262,6 +266,8 @@ config ARCH_EP93XX
select ARM_AMBA
select ARM_VIC
select GENERIC_GPIO
+ select HAVE_CLK
+ select HAVE_CLK
select HAVE_GPIO_LIB
help
This enables support for the Cirrus EP93xx series of CPUs.
@@ -381,6 +387,7 @@ config ARCH_NS9XXX
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select HAVE_CLK
help
Say Y here if you intend to run this kernel on a NetSilicon NS9xxx
System.
@@ -430,6 +437,7 @@ config ARCH_ORION5X
config ARCH_PNX4008
bool "Philips Nexperia PNX4008 Mobile"
+ select HAVE_CLK
help
This enables support for Philips PNX4008 mobile platform.
@@ -438,6 +446,7 @@ config ARCH_PXA
depends on MMU
select ARCH_MTD_XIP
select GENERIC_GPIO
+ select HAVE_CLK
select HAVE_GPIO_LIB
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
@@ -468,6 +477,7 @@ config ARCH_SA1100
select GENERIC_GPIO
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
+ select HAVE_CLK
select TICK_ONESHOT
select HAVE_GPIO_LIB
help
@@ -476,6 +486,7 @@ config ARCH_SA1100
config ARCH_S3C2410
bool "Samsung S3C2410, S3C2412, S3C2413, S3C2440, S3C2442, S3C2443"
select GENERIC_GPIO
+ select HAVE_CLK
help
Samsung S3C2410X CPU based systems, such as the Simtec Electronics
BAST (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or
@@ -503,12 +514,14 @@ config ARCH_DAVINCI
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
select GENERIC_GPIO
+ select HAVE_CLK
help
Support for TI's DaVinci platform.
config ARCH_OMAP
bool "TI OMAP"
select GENERIC_GPIO
+ select HAVE_CLK
select HAVE_GPIO_LIB
select GENERIC_TIME
select GENERIC_CLOCKEVENTS
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index 45d63c986015..df4adefedb42 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -10,6 +10,7 @@ config AVR32
# With EMBEDDED=n, we get lots of stuff automatically selected
# that we usually don't need on AVR32.
select EMBEDDED
+ select HAVE_CLK
select HAVE_OPROFILE
select HAVE_KPROBES
help
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 737ebf9d12bb..4d7e2ba10bae 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -843,6 +843,7 @@ source "crypto/Kconfig"
config PPC_CLOCK
bool
default n
+ select HAVE_CLK
config PPC_LIB_RHEAP
bool
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 3e7384f4619c..8879938f3356 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -8,6 +8,7 @@ mainmenu "Linux/SuperH Kernel Configuration"
config SUPERH
def_bool y
select EMBEDDED
+ select HAVE_CLK
select HAVE_IDE
select HAVE_OPROFILE
help