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 CONFIG_SYS_MPUCLK <desired clock freq in Hz>
Signed-off-by: Mark Jackson mpfj@newflow.co.uk --- Changes in v3: - Changed from V_MPUCLK to CONFIG_SYS_MPUCLK - Added entry in README
Changes in v2: - Tweaked after comments from Peter Korsgaard
README | 4 ++++ arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 7 +++++-- 2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/README b/README index d8cb394..ddf6df2 100644 --- a/README +++ b/README @@ -3820,6 +3820,10 @@ 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 Hz). + + 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..5f2939b 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 550000000 +#endif +#define MPUPLL_M (CONFIG_SYS_MPUCLK/1000000) #define MPUPLL_N (OSC-1) #define MPUPLL_M2 1