From patchwork Tue Jan 29 10:37:03 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [U-Boot, v3, 2/3] mx23: Document the tRAS lockout setting in memory initialization Date: Tue, 29 Jan 2013 00:37:03 -0000 From: Otavio Salvador X-Patchwork-Id: 216492 Message-Id: <1359455824-24058-2-git-send-email-otavio@ossystems.com.br> To: u-boot@lists.denx.de Cc: Fabio Estevam , Marek Vasut , 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 --- Changes in v3: - Revert initialization change and comment the code Changes in v2: - Improve commit message 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 */ writel((1 << 24), MXS_DRAM_BASE + (4 * 8)); #endif }