From a01ee36288b26f31fc1e912324293104f33211c3 Mon Sep 17 00:00:00 2001 From: Rob Barnes Date: Mon, 14 Sep 2020 07:46:19 -0600 Subject: device/dram: Add method for converting MHz to MT/s Add method for converting DDR4 speed in MHz to MT/s. Checks that MHz is within a speed grade range. BUG=b:167155849 TEST=ddr4-test unit test BRANCH=Zork Change-Id: I1433f028afb794fe3e397b03f5bd0565494c8130 Signed-off-by: Rob Barnes Reviewed-on: https://review.coreboot.org/c/coreboot/+/45343 Tested-by: build bot (Jenkins) Reviewed-by: Paul Fagerburg Reviewed-by: Furquan Shaikh --- src/include/device/dram/ddr4.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'src/include/device/dram/ddr4.h') diff --git a/src/include/device/dram/ddr4.h b/src/include/device/dram/ddr4.h index d22d4bc500..eac8bf8920 100644 --- a/src/include/device/dram/ddr4.h +++ b/src/include/device/dram/ddr4.h @@ -69,4 +69,9 @@ enum cb_err spd_add_smbios17_ddr4(const u8 channel, const u8 slot, const u16 selected_freq, const dimm_attr *info); +/** + * Converts DDR4 clock speed in MHz to the standard reported speed in MT/s + */ +uint16_t ddr4_speed_mhz_to_reported_mts(uint16_t speed_mhz); + #endif /* DEVICE_DRAM_DDR4L_H */ -- cgit v1.2.3