Commit e12325f6 authored by Thierry Reding's avatar Thierry Reding
Browse files

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: default avatarThierry Reding <treding@nvidia.com>
parent cd9350c5

arch/arm64/boot/dts/nvidia/tegra210.dtsi

+23 −5
Original line number Diff line number Diff line
@@ -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 = <GIC_SPI 78 IRQ_TYPE_LEVEL_HIGH>;

		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>;

				};

			};

		};

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