From a9dc05130e1a13cb9f6bf55f46071f4977029273 Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Mon, 15 Jul 2013 09:13:04 -0700 Subject: falco: Enable RTD2132 spread spectrum at 1.0% This may need further tuning but will start at 1.0%. boot on falco and check /sys/firmware/log localhost ~ # grep RTD2132 /sys/firmware/log RTD2132: Enable 1.0% Spread Spectrum I2C: 01:35 (Realtek RTD2132 LVDS Bridge) Change-Id: I96e1c14dbc6a7bfaf1c8deb1806c48bf2fd3e32a Signed-off-by: Duncan Laurie Reviewed-on: https://gerrit.chromium.org/gerrit/61895 Reviewed-on: http://review.coreboot.org/4366 Reviewed-by: Patrick Georgi Tested-by: build bot (Jenkins) --- src/mainboard/google/falco/Kconfig | 1 + src/mainboard/google/falco/devicetree.cb | 8 +++++++- 2 files changed, 8 insertions(+), 1 deletion(-) (limited to 'src') diff --git a/src/mainboard/google/falco/Kconfig b/src/mainboard/google/falco/Kconfig index e3663deed5..b372c4714e 100644 --- a/src/mainboard/google/falco/Kconfig +++ b/src/mainboard/google/falco/Kconfig @@ -21,6 +21,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MONOTONIC_TIMER_MSR + select DRIVERS_I2C_RTD2132 config VBOOT_RAMSTAGE_INDEX hex diff --git a/src/mainboard/google/falco/devicetree.cb b/src/mainboard/google/falco/devicetree.cb index cdd5a2ed05..f5a40e15a3 100644 --- a/src/mainboard/google/falco/devicetree.cb +++ b/src/mainboard/google/falco/devicetree.cb @@ -108,7 +108,13 @@ chip northbridge/intel/haswell end end # LPC bridge device pci 1f.2 on end # SATA Controller - device pci 1f.3 on end # SMBus + device pci 1f.3 on # SMBus + chip drivers/i2c/rtd2132 + # Enable Spread Sprectrum at 1.0% + register "sscg_percent" = "0x10" + device i2c 35 on end + end + end device pci 1f.6 on end # Thermal end end -- cgit v1.2.3