[U-Boot] [PATCH 02/10] mx23: Document the tRAS lockout setting in memory initialization

Otavio Salvador
2013-01-30T12:13:13Z

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 */
writel((1 << 24), MXS_DRAM_BASE + (4 * 8));
#endif
}
--
1.8.1