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| author | Caesar Wang <wxt@rock-chips.com> | 2017-05-04 09:24:23 +0800 |
|---|---|---|
| committer | Julius Werner <jwerner@chromium.org> | 2017-05-11 04:55:02 +0200 |
| commit | e085a8a359a82bce204fe15325e1aead53aa3edd (patch) | |
| tree | 875d49f8dc195231e946f2cdd3bad68b480cd427 /src/mainboard/google/gru/Kconfig | |
| parent | 65d15c0f11f2cb986c080c521bec67121723e853 (diff) | |
| download | coreboot-e085a8a359a82bce204fe15325e1aead53aa3edd.tar.xz | |
rockchip/rk3399: enable DPLL SSC for DDR EMI test on bob
Spread Spectrum Modulator (SSMOD) is a fully-digital circuit used to
modulate the frequency of the Silicon Creations’ Fractional PLL in order
to reduce EMI.
We need to turn the DPLL spread spectrum feature on to
reduce the EMI noise for DDR on bob.
Change-Id: I75461d4235bcf55324e6664a1220754e770b4786
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-on: https://review.coreboot.org/19557
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Diffstat (limited to 'src/mainboard/google/gru/Kconfig')
| -rw-r--r-- | src/mainboard/google/gru/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/mainboard/google/gru/Kconfig b/src/mainboard/google/gru/Kconfig index 0fce7cc167..0dba3e9bda 100644 --- a/src/mainboard/google/gru/Kconfig +++ b/src/mainboard/google/gru/Kconfig @@ -38,6 +38,7 @@ config BOARD_SPECIFIC_OPTIONS select MAINBOARD_HAS_CHROMEOS select MAINBOARD_HAS_NATIVE_VGA_INIT select RAM_CODE_SUPPORT + select RK3399_SPREAD_SPECTRUM_DDR if BOARD_GOOGLE_BOB select RTC select SOC_ROCKCHIP_RK3399 select SPI_FLASH |