[U-Boot] [PATCH] Allow AM335x MPU core clock speed to be specified in the board config file
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@newflow.co.uk --- arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h index d748dd2..acfa355 100644 --- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h +++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h @@ -22,7 +22,11 @@ #define OSC (V_OSCK/1000000)
/* MAIN PLL Fdll = 550 MHZ, */ +#ifdef V_MPUCLK +#define MPUPLL_M (V_MPUCLK/1000000) +#else #define MPUPLL_M 550 +#endif #define MPUPLL_N (OSC-1) #define MPUPLL_M2 1
"Mark" == Mark Jackson mpfj-list@mimc.co.uk writes:
Mark> Allow AM335x MPU core clock speed to be specified in the board config file. Mark> To use, add the following to the board's config file:-
Mark> #define V_MPUCLK <desired clock freq in Hz>
Mark> Signed-off-by: Mark Jackson mpfj@newflow.co.uk Mark> --- Mark> arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 4 ++++ Mark> 1 file changed, 4 insertions(+)
Mark> diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h Mark> index d748dd2..acfa355 100644 Mark> --- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h Mark> +++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h Mark> @@ -22,7 +22,11 @@ Mark> #define OSC (V_OSCK/1000000)
Mark> /* MAIN PLL Fdll = 550 MHZ, */ Mark> +#ifdef V_MPUCLK Mark> +#define MPUPLL_M (V_MPUCLK/1000000) Mark> +#else Mark> #define MPUPLL_M 550 Mark> +#endif
It would imho be more readable to do:
/* default to 550 MHz */ #ifndef V_MPUCLK #define V_MPUCLK 550000000 #endif
and then always use it below.
participants (2)
-
Mark Jackson -
Peter Korsgaard