On 12/09/2013 01:28 AM, priyanka.j...@freescale.com wrote:
> Hello York,
>
> I am not able to find mail which contains your comment on to undefined
> CONFIG_DDR_CLK_FREQ, so replying on original mail.
>
> ----
> You are right that we don't need to define CONFIG_DDR_CLK_FREQ in case of
> single source clocking.
> But as T1040QDS supports both single source clocking and separate clocking
> (for DDR and sysclk) and we intend to keep single u-boot binary for both
> modes, we need a mechanism to decide clocking mode at runtime. We thought of
> implementing it via rcw bit. Please suggest if there is some other good way
> to do so.
I am thinking this pseudo code
#ifdef CONFIG_SINGLE_SOURCE_CLK
if (test)
sys_info->freq_ddrbus = CONFIG_SYS_CLK_FREQ;
else
#endif
#ifdef CONFIG_DDR_CLK_FREQ
sys_info->freq_ddrbus = CONFIG_DDR_CLK_FREQ;
#else
sys_info->freq_ddrbus = sysclk;
#endif
York
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