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-rw-r--r--README4
-rw-r--r--arch/arm/include/asm/arch-am33xx/clocks_am33xx.h7
2 files changed, 9 insertions, 2 deletions
diff --git a/README b/README
index 7f2506a..a73234e 100644
--- a/README
+++ b/README
@@ -3878,6 +3878,10 @@ Low Level (hardware related) configuration options:
If defined, the x86 reset vector code is included. This is not
needed when U-Boot is running from Coreboot.
+- CONFIG_SYS_MPUCLK
+ Defines the MPU clock speed (in MHz).
+
+ NOTE : currently only supported on AM335x platforms.
Freescale QE/FMAN Firmware Support:
-----------------------------------
diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index d748dd2..2d96007 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 CONFIG_SYS_MPUCLK
+#define CONFIG_SYS_MPUCLK 550
+#endif
+#define MPUPLL_M CONFIG_SYS_MPUCLK
#define MPUPLL_N (OSC-1)
#define MPUPLL_M2 1