The RK3399-Q7 has multiple build-options for its DRAM configuration, including the timing of the DRAM components populated.
While DDR3-1600 is the standard configuration, custom-configurations are available with DDR3-1333 (for a further cost-optimisation) and with DDR3-1866 (as a premium option).
To simplify our test automation (without the need to maintain 3 different defconfigs) and customer evaluation, we make this selectable via Kconfig.
Signed-off-by: Philipp Tomsich philipp.tomsich@theobroma-systems.com ---
arch/arm/dts/rk3399-puma.dts | 8 +++++++ board/theobroma-systems/puma_rk3399/Kconfig | 37 +++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+)
diff --git a/arch/arm/dts/rk3399-puma.dts b/arch/arm/dts/rk3399-puma.dts index fca14d3..41d32eb 100644 --- a/arch/arm/dts/rk3399-puma.dts +++ b/arch/arm/dts/rk3399-puma.dts @@ -8,7 +8,15 @@
#include <dt-bindings/pwm/pwm.h> #include "rk3399.dtsi" +#if defined(CONFIG_SYS_TSD_PUMA_DDR3_1333) +#include "rk3399-sdram-ddr3-1333.dtsi" +#elif defined(CONFIG_SYS_TSD_PUMA_DDR3_1600) #include "rk3399-sdram-ddr3-1600.dtsi" +#elif defined(CONFIG_SYS_TSD_PUMA_DDR3_1866) +#include "rk3399-sdram-ddr3-1866.dtsi" +#else +#error "Unknown memory timing configuration for the RK3399-Q7" +#endif
/ { model = "Theobroma Systems RK3399-Q7 SoM"; diff --git a/board/theobroma-systems/puma_rk3399/Kconfig b/board/theobroma-systems/puma_rk3399/Kconfig index a645590..1773648 100644 --- a/board/theobroma-systems/puma_rk3399/Kconfig +++ b/board/theobroma-systems/puma_rk3399/Kconfig @@ -12,4 +12,41 @@ config SYS_CONFIG_NAME config BOARD_SPECIFIC_OPTIONS # dummy def_bool y
+if SPL + +choice + prompt "RK3399-Q7 DRAM timings" + default SYS_TSD_PUMA_DDR3_1600 + help + The RK3399-Q7 module is orderable in multiple memory + configurations, which may also differ in the timings used. + + DDR3-1600 is the standard configuration, but both DDR3-1333 + (for potential cost-optimisation) and DDR3-1866 (as a + premium option) are fully validated in the design. + + The setting of this option is used to select the appropriate + timings for inclusion in the device tree controlling DRAM + initialisation during the board-initialisation performed by + the SPL stage. + +config SYS_TSD_PUMA_DDR3_1333 + bool "DDR3-1333 timings" + help + Use DDR3-1333 timings for the DRAM setup of the RK3399-Q7. + +config SYS_TSD_PUMA_DDR3_1600 + bool "DDR3-1600 timings" + help + Use DDR3-1600 timings for the DRAM setup of the RK3399-Q7. + +config SYS_TSD_PUMA_DDR3_1866 + bool "DDR3-1866 timings" + help + Use DDR3-1866 timings for the DRAM setup of the RK3399-Q7. + +endchoice + +endif + endif