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@theobroma-systems.com Tested-by: Klaus Goger klaus.goger@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!");