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Message-ID: <badmoityubqmjsxune27vrh2e6htwkhvnak4uj7iiixnxhjpkm@qi56e6kilyt2>
Date: Thu, 13 Nov 2025 22:08:20 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Sudarshan Shetty <tessolveupstream@...il.com>
Cc: andersson@...nel.org, konradybcio@...nel.org, robh@...nel.org,
krzk+dt@...nel.org, conor+dt@...nel.org, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/2] arm64: dts: qcom: talos-evk: Add support for
QCS615 talos evk board
On Fri, Nov 07, 2025 at 04:27:35PM +0530, Sudarshan Shetty wrote:
> Introduce the device tree support for the QCS615-based talos-evk
You can't introduce DT _support_. It's either introducing a DT or
supporting.
> platform, which follows the SMARC (Smart Mobility ARChitecture)
> standard. The platform is composed of two main hardware
> components: the talos-evk-som and the talos-evk-cb.
are those the actual names? I'd say, the platform is composed of the SoM
(following some standard or not) and a Carrier Board.
> The Talos EVK platform supports multiple display configurations
> HDMI and LVDS that share a common carrier board design.
Other way, the Carrier Board supports several (not multiple) display
configurations.
> Both configurations use the same base carrier board hardware,
> while the display output is selected through hardware configuration
> options (DIP switch selection).
drop the "hardware configuration options". DIP-switch is enough.
>
> To avoid duplication, introduce a new include file,
s/introduce/use/
> talos-evk-cb.dtsi, which defines interfaces and peripherals that are
> common to both display variants.
... and two DTs, cb-hdmi and cb-lvds, describing the selected
configuration.
>
> The initial device tree includes basic support for:
Can any of them be non-basic?
> - CPU and memory
> - UART
> - GPIOs
> - Regulators
> - PMIC
> - Early console
> - AT24MAC602 EEPROM
> - MCP2515 SPI to CAN
> - ADV7535 DSI-to-HDMI bridge
> - DisplayPort
What else is present as a part of the platform? Are we missing
something?
>
> Signed-off-by: Sudarshan Shetty <tessolveupstream@...il.com>
> ---
> arch/arm64/boot/dts/qcom/Makefile | 1 +
> arch/arm64/boot/dts/qcom/talos-evk-cb.dtsi | 56 +++
> arch/arm64/boot/dts/qcom/talos-evk-som.dtsi | 443 ++++++++++++++++++++
> arch/arm64/boot/dts/qcom/talos-evk.dts | 89 ++++
> 4 files changed, 589 insertions(+)
> create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-cb.dtsi
> create mode 100644 arch/arm64/boot/dts/qcom/talos-evk-som.dtsi
> create mode 100644 arch/arm64/boot/dts/qcom/talos-evk.dts
>
> diff --git a/arch/arm64/boot/dts/qcom/Makefile b/arch/arm64/boot/dts/qcom/Makefile
> index 5b52f9e4e5f3..282d744acd73 100644
> --- a/arch/arm64/boot/dts/qcom/Makefile
> +++ b/arch/arm64/boot/dts/qcom/Makefile
> @@ -305,6 +305,7 @@ dtb-$(CONFIG_ARCH_QCOM) += sm8650-mtp.dtb
> dtb-$(CONFIG_ARCH_QCOM) += sm8650-qrd.dtb
> dtb-$(CONFIG_ARCH_QCOM) += sm8750-mtp.dtb
> dtb-$(CONFIG_ARCH_QCOM) += sm8750-qrd.dtb
> +dtb-$(CONFIG_ARCH_QCOM) += talos-evk.dtb
> x1e001de-devkit-el2-dtbs := x1e001de-devkit.dtb x1-el2.dtbo
> dtb-$(CONFIG_ARCH_QCOM) += x1e001de-devkit.dtb x1e001de-devkit-el2.dtb
> x1e78100-lenovo-thinkpad-t14s-el2-dtbs := x1e78100-lenovo-thinkpad-t14s.dtb x1-el2.dtbo
> diff --git a/arch/arm64/boot/dts/qcom/talos-evk-cb.dtsi b/arch/arm64/boot/dts/qcom/talos-evk-cb.dtsi
> new file mode 100644
> index 000000000000..81d15ee4f366
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/talos-evk-cb.dtsi
> @@ -0,0 +1,55 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + */
> +/dts-v1/;
> +
> +#include "talos-evk-som.dtsi"
> +
> +/ {
> + model = "Qualcomm QCS615 IQ 615 EVK";
> + compatible = "qcom,talos-evk", "qcom,qcs615", "qcom,sm6150";
> + chassis-type = "embedded";
> +
> + aliases {
> + mmc1 = &sdhc_2;
> + };
> +
> + dp-connector {
> + compatible = "dp-connector";
> + label = "DP0";
> + type = "full-size";
> +
> + hpd-gpios = <&tlmm 104 GPIO_ACTIVE_HIGH>;
> +
> + port {
> + dp0_connector_in: endpoint {
> + remote-endpoint = <&mdss_dp0_out>;
> + };
> + };
> + };
> +};
> +
> +&pon_pwrkey {
> + status = "okay";
> +};
> +
> +&pon_resin {
> + linux,code = <KEY_VOLUMEDOWN>;
> +
> + status = "okay";
> +};
> +
> +&sdhc_2 {
> + pinctrl-0 = <&sdc2_state_on>;
> + pinctrl-1 = <&sdc2_state_off>;
> + pinctrl-names = "default", "sleep";
> +
> + bus-width = <4>;
> + cd-gpios = <&tlmm 99 GPIO_ACTIVE_LOW>;
> +
> + vmmc-supply = <&vreg_l10a>;
> + vqmmc-supply = <&vreg_s4a>;
> +
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/qcom/talos-evk-som.dtsi b/arch/arm64/boot/dts/qcom/talos-evk-som.dtsi
> new file mode 100644
> index 000000000000..9e6198892c11
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/talos-evk-som.dtsi
> @@ -0,0 +1,443 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + */
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +#include "sm6150.dtsi"
> +#include "pm8150.dtsi"
> +/ {
> + aliases {
> + mmc0 = &sdhc_1;
> + serial0 = &uart0;
> + };
> +
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> +
> + clocks {
> + sleep_clk: sleep-clk {
> + compatible = "fixed-clock";
> + clock-frequency = <32764>;
> + #clock-cells = <0>;
> + };
> +
> + xo_board_clk: xo-board-clk {
> + compatible = "fixed-clock";
> + clock-frequency = <38400000>;
> + #clock-cells = <0>;
> + };
> + };
> +
> + regulator-usb2-vbus {
> + compatible = "regulator-fixed";
> + regulator-name = "USB2_VBUS";
> + gpio = <&pm8150_gpios 10 GPIO_ACTIVE_HIGH>;
> + pinctrl-0 = <&usb2_en>;
> + pinctrl-names = "default";
> + enable-active-high;
> + regulator-always-on;
> + };
> +
> + vreg_v3p3_can: regulator-v3p3-can {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg-v3p3-can";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + vreg_v5p0_can: regulator-v5p0-can {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg-v5p0-can";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +};
> +
> +&apps_rsc {
> + regulators-0 {
> + compatible = "qcom,pm8150-rpmh-regulators";
> + qcom,pmic-id = "a";
> +
> + vreg_s3a: smps3 {
> + regulator-name = "vreg_s3a";
> + regulator-min-microvolt = <600000>;
> + regulator-max-microvolt = <650000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_s4a: smps4 {
> + regulator-name = "vreg_s4a";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1829000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_s5a: smps5 {
> + regulator-name = "vreg_s5a";
> + regulator-min-microvolt = <1896000>;
> + regulator-max-microvolt = <2040000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_s6a: smps6 {
> + regulator-name = "vreg_s6a";
> + regulator-min-microvolt = <1304000>;
> + regulator-max-microvolt = <1404000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1a: ldo1 {
> + regulator-name = "vreg_l1a";
> + regulator-min-microvolt = <488000>;
> + regulator-max-microvolt = <852000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2a: ldo2 {
> + regulator-name = "vreg_l2a";
> + regulator-min-microvolt = <1650000>;
> + regulator-max-microvolt = <3100000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3a: ldo3 {
> + regulator-name = "vreg_l3a";
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1248000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l5a: ldo5 {
> + regulator-name = "vreg_l5a";
> + regulator-min-microvolt = <875000>;
> + regulator-max-microvolt = <975000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l7a: ldo7 {
> + regulator-name = "vreg_l7a";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1900000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l8a: ldo8 {
> + regulator-name = "vreg_l8a";
> + regulator-min-microvolt = <1150000>;
> + regulator-max-microvolt = <1350000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l10a: ldo10 {
> + regulator-name = "vreg_l10a";
> + regulator-min-microvolt = <2950000>;
> + regulator-max-microvolt = <3312000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l11a: ldo11 {
> + regulator-name = "vreg_l11a";
> + regulator-min-microvolt = <1232000>;
> + regulator-max-microvolt = <1260000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l12a: ldo12 {
> + regulator-name = "vreg_l12a";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1890000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l13a: ldo13 {
> + regulator-name = "vreg_l13a";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3230000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l15a: ldo15 {
> + regulator-name = "vreg_l15a";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1904000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l16a: ldo16 {
> + regulator-name = "vreg_l16a";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3312000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_LPM>;
> + regulator-allow-set-load;
> + regulator-allowed-modes = <RPMH_REGULATOR_MODE_LPM
> + RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l17a: ldo17 {
> + regulator-name = "vreg_l17a";
> + regulator-min-microvolt = <2950000>;
> + regulator-max-microvolt = <3312000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +};
> +
> +&i2c5 {
> + status = "okay";
No clock-frequency? Why not add one, disabling the warning?
> +
> + eeprom@57 {
> + compatible = "atmel,24c02";
> + reg = <0x57>;
> + pagesize = <16>;
> + };
> +
> + eeprom@5f {
> + compatible = "atmel,24mac602";
> + reg = <0x5f>;
> + pagesize = <16>;
> + };
> +};
> +
> +&mdss {
> + status = "okay";
> +};
> +
> +&mdss_dp0 {
> + status = "okay";
> +};
> +
> +&mdss_dp0_out {
> + link-frequencies = /bits/ 64 <1620000000 2700000000 5400000000>;
> + remote-endpoint = <&dp0_connector_in>;
> +};
> +
> +&mdss_dp_phy {
> + vdda-phy-supply = <&vreg_l11a>;
> + vdda-pll-supply = <&vreg_l5a>;
> +
> + status = "okay";
> +};
> +
> +&mdss_dsi0 {
> + vdda-supply = <&vreg_l11a>;
> +
> + status = "okay";
> +};
> +
> +&mdss_dsi0_out {
> + remote-endpoint = <&adv7535_in>;
If ADV7535 isn't a part of the SoM, why is this property here?
> + data-lanes = <0 1 2 3>;
> +};
> +
> +&mdss_dsi0_phy {
> + vdds-supply = <&vreg_l5a>;
> +
> + status = "okay";
> +};
> +
> +&pcie {
> + perst-gpios = <&tlmm 101 GPIO_ACTIVE_LOW>;
> + wake-gpios = <&tlmm 100 GPIO_ACTIVE_HIGH>;
> +
> + pinctrl-0 = <&pcie_default_state>;
> + pinctrl-names = "default";
> +
> + status = "okay";
> +};
> +
> +&pcie_phy {
> + vdda-phy-supply = <&vreg_l5a>;
> + vdda-pll-supply = <&vreg_l12a>;
> +
> + status = "okay";
> +};
> +
> +&pm8150_gpios {
> + usb2_en: usb2-en-state {
> + pins = "gpio10";
> + function = "normal";
> + output-enable;
> + power-source = <0>;
> + };
> +};
> +
> +&qupv3_id_0 {
> + status = "okay";
> +};
Is there a need to also enable GPI_DMA?
> +
> +&qupv3_id_1 {
> + status = "okay";
> +};
> +
> +&remoteproc_adsp {
> + firmware-name = "qcom/qcs615/adsp.mbn";
> +
> + status = "okay";
> +};
> +
> +&remoteproc_cdsp {
> + firmware-name = "qcom/qcs615/cdsp.mbn";
> +
> + status = "okay";
> +};
> +
> +&sdhc_1 {
> + pinctrl-0 = <&sdc1_state_on>;
> + pinctrl-1 = <&sdc1_state_off>;
> + pinctrl-names = "default", "sleep";
> +
> + bus-width = <8>;
> + mmc-ddr-1_8v;
> + mmc-hs200-1_8v;
> + mmc-hs400-1_8v;
> + mmc-hs400-enhanced-strobe;
> + vmmc-supply = <&vreg_l17a>;
> + vqmmc-supply = <&vreg_s4a>;
> +
> + non-removable;
> + no-sd;
> + no-sdio;
> +
> + status = "okay";
> +};
> +
> +&spi6 {
> + status = "okay";
> +
> + can@0 {
> + compatible = "microchip,mcp2515";
> + reg = <0>;
> + clock-frequency = <20000000>;
> + interrupts-extended = <&tlmm 87 IRQ_TYPE_LEVEL_LOW>;
> + spi-max-frequency = <10000000>;
> + vdd-supply = <&vreg_v3p3_can>;
> + xceiver-supply = <&vreg_v5p0_can>;
> + };
> +};
> +
> +&tlmm {
> + pcie_default_state: pcie-default-state {
> + clkreq-pins {
> + pins = "gpio90";
> + function = "pcie_clk_req";
> + drive-strength = <2>;
> + bias-pull-up;
> + };
> +
> + perst-pins {
> + pins = "gpio101";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-pull-down;
> + };
> +
> + wake-pins {
> + pins = "gpio100";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-pull-up;
> + };
> + };
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> +
> +&usb_1_hsphy {
> + vdd-supply = <&vreg_l5a>;
> + vdda-pll-supply = <&vreg_l12a>;
> + vdda-phy-dpdm-supply = <&vreg_l13a>;
> +
> + status = "okay";
> +};
> +
> +&usb_qmpphy {
> + vdda-phy-supply = <&vreg_l5a>;
> + vdda-pll-supply = <&vreg_l12a>;
> +
> + status = "okay";
> +};
> +
> +&usb_1 {
> + status = "okay";
> +};
> +
> +&usb_1_dwc3 {
> + dr_mode = "host";
> +};
> +
> +&usb_hsphy_2 {
So, the labels are usb_1_hsphy, but usb_hsphy_2? That's not logical,
please fix one of them. Then please fix the order of nodes here.
> + vdd-supply = <&vreg_l5a>;
> + vdda-pll-supply = <&vreg_l12a>;
> + vdda-phy-dpdm-supply = <&vreg_l13a>;
> +
> + status = "okay";
> +};
> +
> +&usb_2 {
> + status = "okay";
> +};
> +
> +&usb_2_dwc3 {
> + dr_mode = "host";
> +};
> +
> +&ufs_mem_hc {
> + reset-gpios = <&tlmm 123 GPIO_ACTIVE_LOW>;
> + vcc-supply = <&vreg_l17a>;
> + vcc-max-microamp = <600000>;
> + vccq2-supply = <&vreg_s4a>;
> + vccq2-max-microamp = <600000>;
> +
> + status = "okay";
> +};
> +
> +&ufs_mem_phy {
> + vdda-phy-supply = <&vreg_l5a>;
> + vdda-pll-supply = <&vreg_l12a>;
> +
> + status = "okay";
> +};
> +
> +&venus {
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/qcom/talos-evk.dts b/arch/arm64/boot/dts/qcom/talos-evk.dts
> new file mode 100644
> index 000000000000..b694dda422a8
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/talos-evk.dts
> @@ -0,0 +1,89 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + */
> +/dts-v1/;
> +
> +#include "talos-evk-cb.dtsi"
> +
> +/ {
> + hdmi-out {
> + compatible = "hdmi-connector";
> + type = "d";
> +
> + port {
> + hdmi_con_out: endpoint {
> + remote-endpoint = <&adv7535_out>;
> + };
> + };
> + };
> +
> + vreg_v5p0_out: regulator-v5p0-out {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg-v5p0-out";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + regulator-boot-on;
> + regulator-always-on;
> + /* Powered by system 20V rail (USBC_VBUS_IN) */
> + };
> +
> + vreg_v3p3_out: regulator-v3p3-out {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg-v3p3-out";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + vin-supply = <&vreg_v5p0_out>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + vreg_v1p8_out: regulator-v1p8-out {
> + compatible = "regulator-fixed";
> + regulator-name = "vreg-v1p8-out";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + vin-supply = <&vreg_v5p0_out>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +};
> +
> +&i2c1 {
> + clock-frequency = <400000>;
> +
> + status = "okay";
> +
> + bridge: bridge@3d {
> + compatible = "adi,adv7535";
> + reg = <0x3d>;
> + avdd-supply = <&vreg_v1p8_out>;
> + dvdd-supply = <&vreg_v1p8_out>;
> + pvdd-supply = <&vreg_v1p8_out>;
> + a2vdd-supply = <&vreg_v1p8_out>;
> + v3p3-supply = <&vreg_v3p3_out>;
> + interrupts-extended = <&tlmm 26 IRQ_TYPE_LEVEL_LOW>;
> + adi,dsi-lanes = <4>;
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@0 {
> + reg = <0>;
> +
> + adv7535_in: endpoint {
> + remote-endpoint = <&mdss_dsi0_out>;
> + };
> + };
> +
> + port@1 {
> + reg = <1>;
> +
> + adv7535_out: endpoint {
> + remote-endpoint = <&hdmi_con_out>;
> + };
> + };
> + };
> + };
> +};
> --
> 2.34.1
>
--
With best wishes
Dmitry
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