Dear Otavio Salvador,
Add a comment about the tRAS lockout setting of HW_DRAM_CTL08 to enable the 'Fast Auto Pre-Charge' found in the memory chip. The setting is applied after memory initialization and it is worth document it.
Signed-off-by: Otavio Salvador otavio@ossystems.com.br
arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c index f8392f6..37b50e9 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c @@ -119,6 +119,7 @@ static void initialize_dram_values(void) writel(dram_vals[i], MXS_DRAM_BASE + (4 * i));
#ifdef CONFIG_MX23
- /* Enable tRAS lockout in HW_DRAM_CTL08 */
This does not explain why it must be here and not in the dram_vals table. It would be nice to explain it here, since it'd prevent others from sending patch stuffing it into the dram_vals table without knowing it must definitelly be here.
But why does it have to be here? I wonder ...
writel((1 << 24), MXS_DRAM_BASE + (4 * 8)); #endif }
Best regards, Marek Vasut