From 89075d3f4f5550638f0bf656046af5ca0306bdd7 Mon Sep 17 00:00:00 2001 From: Otavio Salvador Date: Sat, 23 Feb 2013 02:43:05 +0000 Subject: mx23: Document the tRAS lockout setting in memory initialization 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 --- arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/arm/cpu') diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c index 4a0a5aa..fdac73c 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c @@ -120,6 +120,10 @@ 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 ; it must be the last + * element to be set + */ writel((1 << 24), MXS_DRAM_BASE + (4 * 8)); #endif } -- cgit v1.1