From e12325f699e6fb396870e9479007fb0069574235 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Thu, 9 Apr 2020 19:34:29 +0200 Subject: arm64: tegra: Hook up EMC cooling device The external memory controller can be used as a cooling device for the LPDDR chips. Hook it up to the "mem" thermal zone of the SOCTHERM block so that temperature polling can be enabled on the EMC when a given temperature is exceeded. Signed-off-by: Thierry Reding --- arch/arm64/boot/dts/nvidia/tegra210.dtsi | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi index 3fa92dd8350b..a550e7b828e6 100644 --- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi @@ -895,7 +895,7 @@ #iommu-cells = <1>; }; - external-memory-controller@7001b000 { + emc: external-memory-controller@7001b000 { compatible = "nvidia,tegra210-emc"; reg = <0x0 0x7001b000 0x0 0x1000>, <0x0 0x7001e000 0x0 0x1000>, @@ -904,6 +904,7 @@ clock-names = "emc"; interrupts = ; nvidia,memory-controller = <&mc>; + #cooling-cells = <2>; }; sata@70020000 { @@ -1561,6 +1562,18 @@ <&soctherm TEGRA124_SOCTHERM_SENSOR_MEM>; trips { + dram_nominal: mem-nominal-trip { + temperature = <50000>; + hysteresis = <1000>; + type = "passive"; + }; + + dram_throttle: mem-throttle-trip { + temperature = <70000>; + hysteresis = <1000>; + type = "active"; + }; + mem-shutdown-trip { temperature = <103000>; hysteresis = <0>; @@ -1569,10 +1582,15 @@ }; cooling-maps { - /* - * There are currently no cooling maps, - * because there are no cooling devices. - */ + dram-passive { + cooling-device = <&emc 0 0>; + trip = <&dram_nominal>; + }; + + dram-active { + cooling-device = <&emc 1 1>; + trip = <&dram_throttle>; + }; }; }; -- cgit v1.2.3