[ARM] 3992/1: i.MX/MX1 CPU Frequency scaling support

Support to change MX1 CPU frequency at runtime.
Tested on PiKRON's PiMX1 board and seems to be fully
stable up to 200 MHz end even as low as 8 MHz.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 10 insertions, 1 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 1a59110784c6..63e7c0c582df 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -732,7 +732,7 @@ config XIP_PHYS_ADDR
 
 endmenu
 
-if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP)
+if (ARCH_SA1100 || ARCH_INTEGRATOR || ARCH_OMAP || ARCH_IMX )
 
 menu "CPU Frequency scaling"
 
@@ -759,6 +759,15 @@ config CPU_FREQ_INTEGRATOR
 
           If in doubt, say Y.
 
+config CPU_FREQ_IMX
+        tristate "CPUfreq driver for i.MX CPUs"
+        depends on ARCH_IMX && CPU_FREQ
+        default n
+        help
+          This enables the CPUfreq driver for i.MX CPUs.
+
+          If in doubt, say N.
+
 endmenu
 
 endif