[U-Boot] [PATCH 2/4] rockchip: arm64: rk3399: support DDR3-1866 (i.e. 933MHz clock)

[Philipp Tomsich]

The RK3399 is capable of driving DDR3 at 933MHz (i.e. DDR3-1866),
if the PCB layout permits and appropriate memory timings are used.

This changes the sanity checks to allow a DTS to request DDR3-1866
operation.

Signed-off-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
Tested-by: Klaus Goger <klaus.goger at theobroma-systems.com>
---

 arch/arm/mach-rockchip/rk3399/sdram_rk3399.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-rockchip/rk3399/sdram_rk3399.c b/arch/arm/mach-rockchip/rk3399/sdram_rk3399.c
index 4dd84e2..0b87fcf 100644
--- a/arch/arm/mach-rockchip/rk3399/sdram_rk3399.c
+++ b/arch/arm/mach-rockchip/rk3399/sdram_rk3399.c
@@ -1090,7 +1090,7 @@ static int sdram_init(struct dram_info *dram,
 
 	debug("Starting SDRAM initialization...\n");
 
-	if ((dramtype == DDR3 && ddr_freq > 800) ||
+	if ((dramtype == DDR3 && ddr_freq > 933) ||
 	    (dramtype == LPDDR3 && ddr_freq > 933) ||
 	    (dramtype == LPDDR4 && ddr_freq > 800)) {
 		debug("SDRAM frequency is to high!");
-- 
1.9.1