Add a 4G configuration and choose it based on the number of banks
declared in config file. A board with 4 SDRAM banks declared (as
per CONFIG_NR_DRAM_BANKS) will end up with the 2G confiuration.
Signed-off-by: Doug Anderson diand...@chromium.org
Signed-off-by: Akshay Saraswat aksha...@samsung.com
---
Changes since v2:
- Rebased this patch
Changes since v1:
- Rebased this patch
arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c | 10 ++
1 file changed, 10 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
index 4d73b45..7c0b12a 100644
--- a/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
+++ b/arch/arm/cpu/armv7/exynos/dmc_init_ddr3.c
@@ -464,6 +464,16 @@ int ddr3_mem_ctrl_init(struct mem_timings *mem, int reset)
+ DMC_OFFSET);
pmu = (struct exynos5_power *)EXYNOS5420_POWER_BASE;
+ if (CONFIG_NR_DRAM_BANKS 4) {
+ /* Need both controllers. */
+ mem-memcontrol |= DMC_MEMCONTROL_NUM_CHIP_2;
+ mem-chips_per_channel = 2;
+ mem-chips_to_configure = 2;
+ } else {
+ /* 2GB requires a single controller */
+ mem-memcontrol |= DMC_MEMCONTROL_NUM_CHIP_1;
+ }
+
/* Enable PAUSE for DREX */
setbits_le32(clk-pause, ENABLE_BIT);
--
1.9.1
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