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Message-ID: <5hgynbka274jerw5x6ekfuoj45k6bqt2hdbsx2puniqornil4s@pdgavjb2jeci>
Date: Tue, 29 Jul 2025 13:44:30 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
To: Yijie Yang <yijie.yang@....qualcomm.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 3/4] arm64: dts: qcom: Add HAMOA-IOT-SOM platform
On Tue, Jul 29, 2025 at 09:31:59AM +0800, Yijie Yang wrote:
> The HAMOA-IOT-SOM is a compact computing module that integrates a System
> on Chip (SoC) — specifically the x1e80100 — along with essential
> components optimized for IoT applications. It is designed to be mounted on
> carrier boards, enabling the development of complete embedded systems.
>
> This change enables and overlays the following components:
What does this mean, how can it overlay something?
> - Regulators on the SOM
> - Reserved memory regions
> - PCIe6a and its PHY
> - PCIe4 and its PHY
> - USB0 through USB6 and their PHYs
> - ADSP, CDSP
> - WLAN, Bluetooth (M.2 interface)
>
> Written with contributions from Yingying Tang (added PCIe4 and its PHY to
> enable WLAN).
>
> Signed-off-by: Yijie Yang <yijie.yang@....qualcomm.com>
> ---
> arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi | 609 ++++++++++++++++++++++++++++
> 1 file changed, 609 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi b/arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi
> new file mode 100644
> index 0000000000000000000000000000000000000000..5facc5544c3df05b89b25fbcb5cd331e93040f15
> --- /dev/null
> +++ b/arch/arm64/boot/dts/qcom/hamoa-iot-som.dtsi
> @@ -0,0 +1,609 @@
> +// SPDX-License-Identifier: BSD-3-Clause
> +/*
> + * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
> + */
> +
> +#include "x1e80100.dtsi"
> +#include "x1e80100-pmics.dtsi"
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/regulator/qcom,rpmh-regulator.h>
> +
> +/ {
> + compatible = "hamoa-iot-som", "qcom,x1e80100";
> +
> + reserved-memory {
> + linux,cma {
> + compatible = "shared-dma-pool";
> + size = <0x0 0x8000000>;
> + reusable;
> + linux,cma-default;
> + };
> + };
> +};
> +
> +&apps_rsc {
> + /* PMC8380C_B */
> + regulators-0 {
> + compatible = "qcom,pm8550-rpmh-regulators";
> + qcom,pmic-id = "b";
> +
> + vdd-bob1-supply = <&vph_pwr>;
> + vdd-bob2-supply = <&vph_pwr>;
> + vdd-l1-l4-l10-supply = <&vreg_s4c_1p8>;
> + vdd-l2-l13-l14-supply = <&vreg_bob1>;
> + vdd-l5-l16-supply = <&vreg_bob1>;
> + vdd-l6-l7-supply = <&vreg_bob2>;
> + vdd-l8-l9-supply = <&vreg_bob1>;
> + vdd-l12-supply = <&vreg_s5j_1p2>;
> + vdd-l15-supply = <&vreg_s4c_1p8>;
> + vdd-l17-supply = <&vreg_bob2>;
> +
> + vreg_bob1: bob1 {
> + regulator-name = "vreg_bob1";
> + regulator-min-microvolt = <3008000>;
> + regulator-max-microvolt = <3960000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_bob2: bob2 {
> + regulator-name = "vreg_bob2";
> + regulator-min-microvolt = <2504000>;
> + regulator-max-microvolt = <3008000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1b_1p8: ldo1 {
> + regulator-name = "vreg_l1b_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2b_3p0: ldo2 {
> + regulator-name = "vreg_l2b_3p0";
> + regulator-min-microvolt = <3072000>;
> + regulator-max-microvolt = <3100000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l4b_1p8: ldo4 {
> + regulator-name = "vreg_l4b_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l5b_3p0: ldo5 {
> + regulator-name = "vreg_l5b_3p0";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3000000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l6b_1p8: ldo6 {
> + regulator-name = "vreg_l6b_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <2960000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l7b_2p8: ldo7 {
> + regulator-name = "vreg_l7b_2p8";
> + regulator-min-microvolt = <2800000>;
> + regulator-max-microvolt = <2800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l8b_3p0: ldo8 {
> + regulator-name = "vreg_l8b_3p0";
> + regulator-min-microvolt = <3072000>;
> + regulator-max-microvolt = <3072000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l9b_2p9: ldo9 {
> + regulator-name = "vreg_l9b_2p9";
> + regulator-min-microvolt = <2960000>;
> + regulator-max-microvolt = <2960000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l10b_1p8: ldo10 {
> + regulator-name = "vreg_l10b_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l12b_1p2: ldo12 {
> + regulator-name = "vreg_l12b_1p2";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-always-on;
> + };
> +
> + vreg_l13b_3p0: ldo13 {
> + regulator-name = "vreg_l13b_3p0";
> + regulator-min-microvolt = <3072000>;
> + regulator-max-microvolt = <3100000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l14b_3p0: ldo14 {
> + regulator-name = "vreg_l14b_3p0";
> + regulator-min-microvolt = <3072000>;
> + regulator-max-microvolt = <3072000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l15b_1p8: ldo15 {
> + regulator-name = "vreg_l15b_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + regulator-always-on;
> + };
> +
> + vreg_l16b_2p9: ldo16 {
> + regulator-name = "vreg_l16b_2p9";
> + regulator-min-microvolt = <2912000>;
> + regulator-max-microvolt = <2912000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l17b_2p5: ldo17 {
> + regulator-name = "vreg_l17b_2p5";
> + regulator-min-microvolt = <2504000>;
> + regulator-max-microvolt = <2504000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380VE_C */
> + regulators-1 {
> + compatible = "qcom,pm8550ve-rpmh-regulators";
> + qcom,pmic-id = "c";
> +
> + vdd-l1-supply = <&vreg_s5j_1p2>;
> + vdd-l2-supply = <&vreg_s1f_0p7>;
> + vdd-l3-supply = <&vreg_s1f_0p7>;
> + vdd-s4-supply = <&vph_pwr>;
> +
> + vreg_s4c_1p8: smps4 {
> + regulator-name = "vreg_s4c_1p8";
> + regulator-min-microvolt = <1856000>;
> + regulator-max-microvolt = <2000000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1c_1p2: ldo1 {
> + regulator-name = "vreg_l1c_1p2";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2c_0p8: ldo2 {
> + regulator-name = "vreg_l2c_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3c_0p8: ldo3 {
> + regulator-name = "vreg_l3c_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380_D */
> + regulators-2 {
> + compatible = "qcom,pmc8380-rpmh-regulators";
> + qcom,pmic-id = "d";
> +
> + vdd-l1-supply = <&vreg_s1f_0p7>;
> + vdd-l2-supply = <&vreg_s1f_0p7>;
> + vdd-l3-supply = <&vreg_s4c_1p8>;
> + vdd-s1-supply = <&vph_pwr>;
> +
> + vreg_l1d_0p8: ldo1 {
> + regulator-name = "vreg_l1d_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2d_0p9: ldo2 {
> + regulator-name = "vreg_l2d_0p9";
> + regulator-min-microvolt = <912000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3d_1p8: ldo3 {
> + regulator-name = "vreg_l3d_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380_E */
> + regulators-3 {
> + compatible = "qcom,pmc8380-rpmh-regulators";
> + qcom,pmic-id = "e";
> +
> + vdd-l2-supply = <&vreg_s1f_0p7>;
> + vdd-l3-supply = <&vreg_s5j_1p2>;
> +
> + vreg_l2e_0p8: ldo2 {
> + regulator-name = "vreg_l2e_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3e_1p2: ldo3 {
> + regulator-name = "vreg_l3e_1p2";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380_F */
> + regulators-4 {
> + compatible = "qcom,pmc8380-rpmh-regulators";
> + qcom,pmic-id = "f";
> +
> + vdd-l1-supply = <&vreg_s5j_1p2>;
> + vdd-l2-supply = <&vreg_s5j_1p2>;
> + vdd-l3-supply = <&vreg_s5j_1p2>;
> + vdd-s1-supply = <&vph_pwr>;
> +
> + vreg_s1f_0p7: smps1 {
> + regulator-name = "vreg_s1f_0p7";
> + regulator-min-microvolt = <700000>;
> + regulator-max-microvolt = <1100000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1f_1p0: ldo1 {
> + regulator-name = "vreg_l1f_1p0";
> + regulator-min-microvolt = <1024000>;
> + regulator-max-microvolt = <1024000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2f_1p0: ldo2 {
> + regulator-name = "vreg_l2f_1p0";
> + regulator-min-microvolt = <1024000>;
> + regulator-max-microvolt = <1024000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3f_1p0: ldo3 {
> + regulator-name = "vreg_l3f_1p0";
> + regulator-min-microvolt = <1024000>;
> + regulator-max-microvolt = <1024000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380VE_I */
> + regulators-6 {
> + compatible = "qcom,pm8550ve-rpmh-regulators";
> + qcom,pmic-id = "i";
> +
> + vdd-l1-supply = <&vreg_s4c_1p8>;
> + vdd-l2-supply = <&vreg_s5j_1p2>;
> + vdd-l3-supply = <&vreg_s1f_0p7>;
> + vdd-s1-supply = <&vph_pwr>;
> + vdd-s2-supply = <&vph_pwr>;
> +
> + vreg_s1i_0p9: smps1 {
> + regulator-name = "vreg_s1i_0p9";
> + regulator-min-microvolt = <900000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_s2i_1p0: smps2 {
> + regulator-name = "vreg_s2i_1p0";
> + regulator-min-microvolt = <1000000>;
> + regulator-max-microvolt = <1100000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1i_1p8: ldo1 {
> + regulator-name = "vreg_l1i_1p8";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <1800000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2i_1p2: ldo2 {
> + regulator-name = "vreg_l2i_1p2";
> + regulator-min-microvolt = <1200000>;
> + regulator-max-microvolt = <1200000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3i_0p8: ldo3 {
> + regulator-name = "vreg_l3i_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +
> + /* PMC8380VE_J */
> + regulators-7 {
> + compatible = "qcom,pm8550ve-rpmh-regulators";
> + qcom,pmic-id = "j";
> +
> + vdd-l1-supply = <&vreg_s1f_0p7>;
> + vdd-l2-supply = <&vreg_s5j_1p2>;
> + vdd-l3-supply = <&vreg_s1f_0p7>;
> + vdd-s5-supply = <&vph_pwr>;
> +
> + vreg_s5j_1p2: smps5 {
> + regulator-name = "vreg_s5j_1p2";
> + regulator-min-microvolt = <1256000>;
> + regulator-max-microvolt = <1304000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l1j_0p8: ldo1 {
> + regulator-name = "vreg_l1j_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l2j_1p2: ldo2 {
> + regulator-name = "vreg_l2j_1p2";
> + regulator-min-microvolt = <1256000>;
> + regulator-max-microvolt = <1256000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> +
> + vreg_l3j_0p8: ldo3 {
> + regulator-name = "vreg_l3j_0p8";
> + regulator-min-microvolt = <880000>;
> + regulator-max-microvolt = <920000>;
> + regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
> + };
> + };
> +};
> +
> +&pcie4 {
> + perst-gpios = <&tlmm 146 GPIO_ACTIVE_LOW>;
> + wake-gpios = <&tlmm 148 GPIO_ACTIVE_LOW>;
> +
> + pinctrl-0 = <&pcie4_default>;
> + pinctrl-names = "default";
> +
> + status = "okay";
> +};
> +
> +&pcie4_phy {
> + vdda-phy-supply = <&vreg_l3i_0p8>;
> + vdda-pll-supply = <&vreg_l3e_1p2>;
> +
> + status = "okay";
> +};
> +
> +&pcie6a {
> + perst-gpios = <&tlmm 152 GPIO_ACTIVE_LOW>;
> + wake-gpios = <&tlmm 154 GPIO_ACTIVE_LOW>;
> +
> + pinctrl-0 = <&pcie6a_default>;
> + pinctrl-names = "default";
> +
> + status = "okay";
> +};
> +
> +&pcie6a_phy {
> + vdda-phy-supply = <&vreg_l1d_0p8>;
> + vdda-pll-supply = <&vreg_l2j_1p2>;
> +
> + status = "okay";
> +};
> +
> +&qupv3_0 {
> + status = "okay";
> +};
> +
> +&qupv3_1 {
> + status = "okay";
> +};
> +
> +&qupv3_2 {
> + status = "okay";
> +};
> +
> +&remoteproc_adsp {
> + firmware-name = "qcom/x1e80100/adsp.mbn",
> + "qcom/x1e80100/adsp_dtb.mbn";
> +
> + status = "okay";
> +};
> +
> +&remoteproc_cdsp {
> + firmware-name = "qcom/x1e80100/cdsp.mbn",
> + "qcom/x1e80100/cdsp_dtb.mbn";
> +
> + status = "okay";
> +};
> +
> +&tlmm {
> + gpio-reserved-ranges = <34 2>, /* TPM LP & INT */
> + <44 4>; /* SPI (TPM) */
> +
> + pcie4_default: pcie4-default-state {
> + clkreq-n-pins {
> + pins = "gpio147";
> + function = "pcie4_clk";
> + drive-strength = <2>;
> + bias-pull-up;
> + };
> +
> + perst-n-pins {
> + pins = "gpio146";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-disable;
> + };
> +
> + wake-n-pins {
> + pins = "gpio148";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-pull-up;
> + };
> + };
> +
> + pcie6a_default: pcie6a-default-state {
> + clkreq-n-pins {
> + pins = "gpio153";
> + function = "pcie6a_clk";
> + drive-strength = <2>;
> + bias-pull-up;
> + };
> +
> + perst-n-pins {
> + pins = "gpio152";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-disable;
> + };
> +
> + wake-n-pins {
> + pins = "gpio154";
> + function = "gpio";
> + drive-strength = <2>;
> + bias-pull-up;
> +
> + };
> + };
> +};
> +
> +&usb_1_ss0 {
> + status = "okay";
> +};
> +
> +&usb_1_ss0_dwc3 {
> + dr_mode = "otg";
Should not be necessary, otg is a default.
> + usb-role-switch;
This should be a part of the x1e80100.dtsi, but please see commit
7db0ba3e6e6c ("Revert "arm64: dts: qcom: x1e80100: enable OTG on USB-C
controllers"")
> +};
> +
> +&usb_1_ss0_hsphy {
> + vdd-supply = <&vreg_l3j_0p8>;
> + vdda12-supply = <&vreg_l2j_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_1_ss0_qmpphy {
> + vdda-phy-supply = <&vreg_l2j_1p2>;
> + vdda-pll-supply = <&vreg_l1j_0p8>;
> +
> + status = "okay";
> +};
> +
> +&usb_1_ss1 {
> + status = "okay";
> +};
> +
> +&usb_1_ss1_dwc3 {
> + dr_mode = "otg";
> + usb-role-switch;
> +};
> +
> +&usb_1_ss1_hsphy {
> + vdd-supply = <&vreg_l3j_0p8>;
> + vdda12-supply = <&vreg_l2j_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_1_ss1_qmpphy {
> + vdda-phy-supply = <&vreg_l2j_1p2>;
> + vdda-pll-supply = <&vreg_l2d_0p9>;
> +
> + status = "okay";
> +};
> +
> +&usb_1_ss2 {
> + status = "okay";
> +};
> +
> +&usb_1_ss2_dwc3 {
> + dr_mode = "otg";
> + usb-role-switch;
> +};
> +
> +&usb_1_ss2_hsphy {
> + vdd-supply = <&vreg_l3j_0p8>;
> + vdda12-supply = <&vreg_l2j_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_1_ss2_qmpphy {
> + vdda-phy-supply = <&vreg_l2j_1p2>;
> + vdda-pll-supply = <&vreg_l2d_0p9>;
> +
> + status = "okay";
> +};
> +
> +&usb_2 {
> + status = "okay";
> +};
> +
> +&usb_2_dwc3 {
> + dr_mode = "host";
Why? Is it actually host-only?
> +};
> +
> +&usb_2_hsphy {
> + vdd-supply = <&vreg_l2e_0p8>;
> + vdda12-supply = <&vreg_l3e_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_mp {
> + status = "okay";
> +};
> +
> +&usb_mp_hsphy0 {
> + vdd-supply = <&vreg_l2e_0p8>;
> + vdda12-supply = <&vreg_l3e_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_mp_hsphy1 {
> + vdd-supply = <&vreg_l2e_0p8>;
> + vdda12-supply = <&vreg_l3e_1p2>;
> +
> + status = "okay";
> +};
> +
> +&usb_mp_qmpphy0 {
> + vdda-phy-supply = <&vreg_l3e_1p2>;
> + vdda-pll-supply = <&vreg_l3c_0p8>;
> +
> + status = "okay";
> +};
> +
> +&usb_mp_qmpphy1 {
> + vdda-phy-supply = <&vreg_l3e_1p2>;
> + vdda-pll-supply = <&vreg_l3c_0p8>;
> +
> + status = "okay";
> +};
>
> --
> 2.34.1
>
--
With best wishes
Dmitry
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