ARM: OMAP: Add initialisation for the real-time counter.

The real time counter also called master counter, is a free-running
counter. It produces the count used by the CPU local timer peripherals
in the MPU cluster. The timer counts at a rate of 6.144 MHz.

The ratio registers needs to be configured based on system clock
only onetime. After initialisation, hardware takes care of adjusting
the clock in different low power modes to keep counter rate constant.

Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 346fd26f3aa6..4b773fd56978 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -24,6 +24,9 @@ config ARCH_OMAP2PLUS_TYPICAL
 config SOC_HAS_OMAP2_SDRC
         bool "OMAP2 SDRAM Controller support"
 
+config SOC_HAS_REALTIME_COUNTER
+        bool "Real time free running counter"
+
 config ARCH_OMAP2
         bool "TI OMAP2"
         depends on ARCH_OMAP2PLUS
@@ -70,6 +73,7 @@ config SOC_OMAP5
         select ARM_GIC
         select HAVE_SMP
         select ARM_CPU_SUSPEND if PM
+        select SOC_HAS_REALTIME_COUNTER
 
 comment "OMAP Core Type"
         depends on ARCH_OMAP2