[PATCH 03/11] ARM: clps711x: Adds config option for CPU PLL multiplier

[Alexander Shiyan]

Signed-off-by: Alexander Shiyan <shc_work at mail.ru>
---
 arch/arm/mach-clps711x/Kconfig    |   13 +++++++++++++
 arch/arm/mach-clps711x/lowlevel.c |    4 ++--
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-clps711x/Kconfig b/arch/arm/mach-clps711x/Kconfig
index f0adeda..d2873b4 100644
--- a/arch/arm/mach-clps711x/Kconfig
+++ b/arch/arm/mach-clps711x/Kconfig
@@ -10,6 +10,19 @@ config MACH_CLEP7212
 
 endchoice
 
+menu "CLPS711X specific settings"
+
+config CLPS711X_CPU_PLL_MULT
+	int "CPU PLL multiplier (20-50)"
+	range 20 50
+	default "40"
+	help
+	  Define CPU PLL multiplier. PLL is calculated by formula:
+	    PLL Frequency = (PLL Multiplier / 2) * 3686400 Hz
+	  Default value is 40, for achieve 73 MHz.
+
+endmenu
+
 config BOARDINFO
 	default "Cirrus Logic CLEP7212" if MACH_CLEP7212
 
diff --git a/arch/arm/mach-clps711x/lowlevel.c b/arch/arm/mach-clps711x/lowlevel.c
index 0249c60..245ac93 100644
--- a/arch/arm/mach-clps711x/lowlevel.c
+++ b/arch/arm/mach-clps711x/lowlevel.c
@@ -18,10 +18,10 @@
 #include <mach/clps711x.h>
 
 #define MAIN_CLOCK		3686400
-#define CPU_SPEED		92160000
+#define CPU_SPEED		((CONFIG_CLPS711X_CPU_PLL_MULT * MAIN_CLOCK) / 2)
 #define BUS_SPEED		(CPU_SPEED / 2)
 
-#define PLL_VALUE		(((CPU_SPEED * 2) / MAIN_CLOCK) << 24)
+#define PLL_VALUE		(CONFIG_CLPS711X_CPU_PLL_MULT << 24)
 #define SDRAM_REFRESH_RATE	(64 * (BUS_SPEED / (8192 * 1000)))
 
 void __naked __bare_init barebox_arm_reset_vector(void)
-- 
1.7.3.4