[PATCH v2 14/15] arm64: dts: qcom: Add initial Milos dtsi

[Konrad Dybcio]

On 7/13/25 10:05 AM, Luca Weiss wrote:
> Add a devicetree description for the Milos SoC, which is for example
> Snapdragon 7s Gen 3 (SM7635).
> 
> Signed-off-by: Luca Weiss <luca.weiss at fairphone.com>
> ---

[...]

> +		cpu-map {
> +			cluster0 {
> +				core0 {
> +					cpu = <&cpu0>;
> +				};
> +
> +				core1 {
> +					cpu = <&cpu1>;
> +				};
> +
> +				core2 {
> +					cpu = <&cpu2>;
> +				};
> +
> +				core3 {
> +					cpu = <&cpu3>;
> +				};
> +			};
> +
> +			cluster1 {
> +				core0 {
> +					cpu = <&cpu4>;
> +				};
> +
> +				core1 {
> +					cpu = <&cpu5>;
> +				};
> +
> +				core2 {
> +					cpu = <&cpu6>;
> +				};
> +			};
> +
> +			cluster2 {
> +				core0 {
> +					cpu = <&cpu7>;
> +				};
> +			};
> +		};

I'm getting mixed information about the core topology.. 

What does dmesg say wrt this line?

CPU%u: Booted secondary processor 0x%010lx [0x%08x]\n

> +	pmu-a520 {
> +		compatible = "arm,cortex-a520-pmu";
> +		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
> +	};
> +
> +	pmu-a720 {
> +		compatible = "arm,cortex-a720-pmu";
> +		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
> +	};

See:

9ce52e908bd5 ("arm64: dts: qcom: sm8650: switch to interrupt-cells 4 to add PPI partitions")
2c06e0797c32 ("arm64: dts: qcom: sm8650: add PPI interrupt partitions for the ARM PMUs")

[...]

> +		gcc: clock-controller at 100000 {
> +			compatible = "qcom,milos-gcc";
> +			reg = <0x0 0x00100000 0x0 0x1f4200>;
> +
> +			clocks = <&rpmhcc RPMH_CXO_CLK>,
> +				 <&sleep_clk>,
> +				 <0>, /* pcie_0_pipe_clk */
> +				 <0>, /* pcie_1_pipe_clk */
> +				 <0>, /* ufs_phy_rx_symbol_0_clk */
> +				 <0>, /* ufs_phy_rx_symbol_1_clk */
> +				 <0>, /* ufs_phy_tx_symbol_0_clk */
> +				 <0>; /* usb3_phy_wrapper_gcc_usb30_pipe_clk */
> +			protected-clocks = <GCC_PCIE_1_AUX_CLK>, <GCC_PCIE_1_AUX_CLK_SRC>,
> +					<GCC_PCIE_1_CFG_AHB_CLK>, <GCC_PCIE_1_MSTR_AXI_CLK>,
> +					<GCC_PCIE_1_PHY_RCHNG_CLK>, <GCC_PCIE_1_PHY_RCHNG_CLK_SRC>,
> +					<GCC_PCIE_1_PIPE_CLK>, <GCC_PCIE_1_PIPE_CLK_SRC>,
> +					<GCC_PCIE_1_PIPE_DIV2_CLK>, <GCC_PCIE_1_PIPE_DIV2_CLK_SRC>,
> +					<GCC_PCIE_1_SLV_AXI_CLK>, <GCC_PCIE_1_SLV_Q2A_AXI_CLK>;

Does access control disallow accessing these on your prod-fused
device?

[...]

> +		usb_1: usb at a600000 {
> +			compatible = "qcom,milos-dwc3", "qcom,snps-dwc3";
> +			reg = <0x0 0x0a600000 0x0 0x10000>;

size = 0xfc_000

[...]

> +
> +			clocks = <&gcc GCC_CFG_NOC_USB3_PRIM_AXI_CLK>,
> +				 <&gcc GCC_USB30_PRIM_MASTER_CLK>,
> +				 <&gcc GCC_AGGRE_USB3_PRIM_AXI_CLK>,
> +				 <&gcc GCC_USB30_PRIM_SLEEP_CLK>,
> +				 <&gcc GCC_USB30_PRIM_MOCK_UTMI_CLK>,
> +				 <&rpmhcc RPMH_CXO_CLK>;
> +			clock-names = "cfg_noc",
> +				      "core",
> +				      "iface",
> +				      "sleep",
> +				      "mock_utmi",
> +				      "xo";
> +
> +			assigned-clocks = <&gcc GCC_USB30_PRIM_MOCK_UTMI_CLK>,
> +					  <&gcc GCC_USB30_PRIM_MASTER_CLK>;
> +			assigned-clock-rates = <19200000>, <133333333>;

Set the latter to 200000000 - your device doesn't have USB3, but the
next person may lose their hair about tracking down why it doesn't
work on theirs

[...]

> +		pdc: interrupt-controller at b220000 {
> +			compatible = "qcom,milos-pdc", "qcom,pdc";
> +			reg = <0x0 0x0b220000 0x0 0x30000>, <0x0 0x174000f0 0x0 0x64>;

1 per line, please

> +			interrupt-parent = <&intc>;
> +
> +			qcom,pdc-ranges = <0 480 40>, <40 140 11>, <51 527 47>,
> +					  <98 609 31>, <129 63 1>, <130 716 12>,
> +					  <142 251 5>;
> +
> +			#interrupt-cells = <2>;
> +			interrupt-controller;
> +		};
> +
> +		tsens0: thermal-sensor at c228000 {
> +			compatible = "qcom,milos-tsens", "qcom,tsens-v2";
> +			reg = <0x0 0x0c228000 0x0 0x1ff>, /* TM */
> +			      <0x0 0x0c222000 0x0 0x1ff>; /* SROT */

drop the comments

the sizes are 0x1000 for both regions for both controllers

> +
> +			interrupts = <GIC_SPI 506 IRQ_TYPE_LEVEL_HIGH>,

pdc 26

> +				     <GIC_SPI 640 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "uplow",
> +					  "critical";
> +
> +			#qcom,sensors = <15>;
> +
> +			#thermal-sensor-cells = <1>;
> +		};
> +
> +		tsens1: thermal-sensor at c229000 {
> +			compatible = "qcom,milos-tsens", "qcom,tsens-v2";
> +			reg = <0x0 0x0c229000 0x0 0x1ff>, /* TM */
> +			      <0x0 0x0c223000 0x0 0x1ff>; /* SROT */
> +
> +			interrupts = <GIC_SPI 507 IRQ_TYPE_LEVEL_HIGH>,

pdc 27

> +				     <GIC_SPI 641 IRQ_TYPE_LEVEL_HIGH>;
> +			interrupt-names = "uplow",
> +					  "critical";
> +
> +			#qcom,sensors = <14>;
> +
> +			#thermal-sensor-cells = <1>;
> +		};
> +
> +		aoss_qmp: power-management at c300000 {
> +			compatible = "qcom,milos-aoss-qmp", "qcom,aoss-qmp";
> +			reg = <0x0 0x0c300000 0x0 0x400>;
> +
> +			interrupt-parent = <&ipcc>;
> +			interrupts-extended = <&ipcc IPCC_CLIENT_AOP IPCC_MPROC_SIGNAL_GLINK_QMP
> +						     IRQ_TYPE_EDGE_RISING>;
> +
> +			mboxes = <&ipcc IPCC_CLIENT_AOP IPCC_MPROC_SIGNAL_GLINK_QMP>;
> +
> +			#clock-cells = <0>;
> +		};
> +
> +		sram at c3f0000 {
> +			compatible = "qcom,rpmh-stats";
> +			reg = <0x0 0x0c3f0000 0x0 0x400>;
> +		};
> +
> +		spmi_bus: spmi at c400000 {
> +			compatible = "qcom,spmi-pmic-arb";

There's two bus instances on this platform, check out the x1e binding

[...]

> +		intc: interrupt-controller at 17100000 {
> +			compatible = "arm,gic-v3";
> +			reg = <0x0 0x17100000 0x0 0x10000>,	/* GICD */
> +			      <0x0 0x17180000 0x0 0x200000>;	/* GICR * 8 */

drop the comments please

[...]

> +			clocks = <&rpmhcc RPMH_CXO_CLK>, <&gcc GCC_GPLL0>;
> +			clock-names = "xo", "alternate";

1 a line, please

[...]

> +		cpuss0-thermal {
> +			thermal-sensors = <&tsens0 1>;
> +
> +			trips {
> +				cpuss0-hot {
> +					temperature = <110000>;
> +					hysteresis = <1000>;
> +					type = "hot";
> +				};
> +
> +				cpuss0-critical {
> +					temperature = <115000>;
> +					hysteresis = <0>;
> +					type = "critical";
> +				};
> +			};
> +		};

See:

06eadce93697 ("arm64: dts: qcom: x1e80100: Drop unused passive thermal trip points for CPU")

(tldr drop non-critical trips for CPU)

Konrad