[U-Boot] [PATCH v2] Allow AM335x MPU core clock speed to be specified in the board config file

[Mark Jackson]

Allow AM335x MPU core clock speed to be specified in the board config file.
To use, add the following to the board's config file:-

#define V_MPUCLK	<desired clock freq in Hz>

Signed-off-by: Mark Jackson <mpfj at newflow.co.uk>
---
Changes in v2:
- Tweaked after comments from Peter Korsgaard

 arch/arm/include/asm/arch-am33xx/clocks_am33xx.h |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index d748dd2..f1a8aa7 100644
--- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
+++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
@@ -21,8 +21,11 @@
 
 #define OSC	(V_OSCK/1000000)
 
-/* MAIN PLL Fdll = 550 MHZ, */
-#define MPUPLL_M	550
+/* MAIN PLL Fdll = 550 MHZ, by default */
+#ifndef V_MPUCLK
+#define V_MPUCLK	550000000
+#endif
+#define MPUPLL_M	(V_MPUCLK/1000000)
 #define MPUPLL_N	(OSC-1)
 #define MPUPLL_M2	1
 
-- 
1.7.9.5