Re: [PATCH mvebu-dt64] arm64: dts: marvell: armada-37xx: Add DTS file for Turris Mox

From: Gregory CLEMENT
Date: Thu Aug 30 2018 - 11:11:26 EST

Hi Marek,

On jeu., aoÃt 30 2018, Marek BehÃn <marek.behun@xxxxxx> wrote:

> This adds support for the Turris Mox board from CZ.NIC.
>
> Turris Mox is as modular router based on the Armada 3720 SOC (same as
> EspressoBin).
>
> The basic module can be extended by different modules.
> When those modules are connected, U-Boot shall patch this device-tree
> by enabling nodes corresponding to those modules.

could you resubmit it adding the other mvebu maintainer and the arm linux
kernel mailing as mentioned in the MAINTAINER file?

Thanks,

Gregory

>
> Signed-off-by: Marek BehÃn <marek.behun@xxxxxx>
> ---
> .../arm/marvell/armada-3720-turris-mox.txt | 6 +
> arch/arm64/boot/dts/marvell/Makefile | 1 +
> .../boot/dts/marvell/armada-3720-turris-mox.dts | 817 +++++++++++++++++++++
> 3 files changed, 824 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/marvell/armada-3720-turris-mox.txt
> create mode 100644 arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
>
> diff --git
> a/Documentation/devicetree/bindings/arm/marvell/armada-3720-turris-mox.txt
> b/Documentation/devicetree/bindings/arm/marvell/armada-3720-turris-mox.txt
> new file mode 100644
> index 000000000000..408fc07a9bbf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/marvell/armada-3720-turris-mox.txt
> @@ -0,0 +1,6 @@
> +CZ.NIC's Turris Mox SOHO router Device Tree Bindings
> +----------------------------------------------------
> +
> +Required root node property:
> +
> +compatible: must contain "cznic,turris-mox"
> diff --git a/arch/arm64/boot/dts/marvell/Makefile b/arch/arm64/boot/dts/marvell/Makefile
> index ea9d49f2a911..1dd89d1bf8ad 100644
> --- a/arch/arm64/boot/dts/marvell/Makefile
> +++ b/arch/arm64/boot/dts/marvell/Makefile
> @@ -2,6 +2,7 @@
> # Mvebu SoC Family
> dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-db.dtb
> dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-espressobin.dtb
> +dtb-$(CONFIG_ARCH_MVEBU) += armada-3720-turris-mox.dtb
> dtb-$(CONFIG_ARCH_MVEBU) += armada-7040-db.dtb
> dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-db.dtb
> dtb-$(CONFIG_ARCH_MVEBU) += armada-8040-mcbin.dtb
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> new file mode 100644
> index 000000000000..9267ae96f14f
> --- /dev/null
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> @@ -0,0 +1,817 @@
> +// SPDX-License-Identifier: GPL-2.0+ or X11
> +/*
> + * Device Tree file for CZ.NIC Turris Mox Board
> + * 2018 by Marek Behun <marek.behun@xxxxxx>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/input/input.h>
> +#include "armada-372x.dtsi"
> +
> +/ {
> + model = "CZ.NIC Turris Mox Board";
> + compatible = "cznic,turris-mox", "marvell,armada3720",
> + "marvell,armada3710";
> +
> + aliases {
> + spi0 = &spi0;
> + };
> +
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> +
> + memory@0 {
> + device_type = "memory";
> + reg = <0x00000000 0x00000000 0x00000000 0x20000000>;
> + };
> +
> + leds {
> + compatible = "gpio-leds";
> + red {
> + gpios = <&gpiosb 21 GPIO_ACTIVE_LOW>;
> + linux,default-trigger = "heartbeat";
> + };
> + };
> +
> + gpio_keys {
> + compatible = "gpio-keys";
> +
> + reset_button {
> + label = "reset";
> + linux,code = <BTN_MISC>;
> + gpios = <&gpiosb 20 GPIO_ACTIVE_LOW>;
> + debounce-interval = <60>;
> + };
> + };
> +
> + exp_usb3_vbus: usb3-vbus {
> + compatible = "regulator-fixed";
> + regulator-name = "usb3-vbus";
> + regulator-min-microvolt = <5000000>;
> + regulator-max-microvolt = <5000000>;
> + enable-active-high;
> + regulator-always-on;
> + gpio = <&gpiosb 0 GPIO_ACTIVE_HIGH>;
> + };
> +
> + usb3_phy: usb3-phy {
> + compatible = "usb-nop-xceiv";
> + vcc-supply = <&exp_usb3_vbus>;
> + };
> +
> + vsdc_reg: vsdc_reg {
> + compatible = "regulator-gpio";
> + regulator-name = "vsdc";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> +
> + gpios = <&gpiosb 23 GPIO_ACTIVE_HIGH>;
> + gpios-states = <0>;
> + states = <1800000 0x1
> + 3300000 0x0>;
> + enable-active-high;
> + };
> +
> + vsdio_reg: vsdio_reg {
> + compatible = "regulator-gpio";
> + regulator-name = "vsdio";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> +
> + gpios = <&gpiosb 22 GPIO_ACTIVE_HIGH>;
> + gpios-states = <0>;
> + states = <1800000 0x1
> + 3300000 0x0>;
> + enable-active-high;
> + };
> +
> + sfp: sfp {
> + compatible = "sff,sfp+";
> + i2c-bus = <&i2c0>;
> + los-gpio = <&moxtet_sfp 0 GPIO_ACTIVE_HIGH>;
> + tx-fault-gpio = <&moxtet_sfp 1 GPIO_ACTIVE_HIGH>;
> + mod-def0-gpio = <&moxtet_sfp 2 GPIO_ACTIVE_LOW>;
> + tx-disable-gpio = <&moxtet_sfp 3 GPIO_ACTIVE_HIGH>;
> + rate-select0-gpio = <&moxtet_sfp 4 GPIO_ACTIVE_HIGH>;
> + status = "disabled";
> + };
> +};
> +
> +&pinctrl_nb {
> + spi_cs1_pins: spi-cs1-pins {
> + groups = "spi_cs1";
> + function = "spi";
> + };
> +
> + sdio0_pins: sdio0-pins {
> + groups = "sdio0";
> + function = "sdio";
> + };
> +};
> +
> +&pinctrl_sb {
> + sdio_sb_pins: sdio-sb-pins {
> + groups = "sdio_sb";
> + function = "sdio";
> + };
> +
> + smi_pins: smi-pins {
> + groups = "smi";
> + function = "smi";
> + };
> +
> + pcie_pins: pcie1-pins {
> + groups = "pcie1";
> + function = "gpio";
> + };
> +};
> +
> +&i2c0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&i2c1_pins>;
> + status = "okay";
> +
> + rtc@6f {
> + compatible = "microchip,mcp7940x";
> + reg = <0x6f>;
> + };
> +};
> +
> +&pcie0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pcie_pins>;
> + status = "okay";
> + max-link-speed = <2>;
> + reset-gpio = <&gpiosb 3 GPIO_ACTIVE_HIGH>;
> +
> + /* this shall be enabled by u-boot if the PCIe module is present */
> + status = "disabled";
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> +
> +&eth0 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&rgmii_pins>;
> + phy-mode = "rgmii-id";
> + phy = <&phy1>;
> + status = "okay";
> +};
> +
> +&eth1 {
> + phy-mode = "1000base-x";
> + managed = "in-band-status";
> +};
> +
> +&mdio {
> + pinctrl-names = "default";
> + pinctrl-0 = <&smi_pins>;
> + status = "okay";
> +
> + phy1: ethernet-phy@1 {
> + reg = <1>;
> + };
> +
> + switch0@10 {
> + compatible = "marvell,mv88e6190";
> + reg = <0x10 0>;
> + dsa,member = <0 0>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch0phy1: switch0phy1@1 {
> + reg = <0x1>;
> + };
> +
> + switch0phy2: switch0phy2@2 {
> + reg = <0x2>;
> + };
> +
> + switch0phy3: switch0phy3@3 {
> + reg = <0x3>;
> + };
> +
> + switch0phy4: switch0phy4@4 {
> + reg = <0x4>;
> + };
> +
> + switch0phy5: switch0phy5@5 {
> + reg = <0x5>;
> + };
> +
> + switch0phy6: switch0phy6@6 {
> + reg = <0x6>;
> + };
> +
> + switch0phy7: switch0phy7@7 {
> + reg = <0x7>;
> + };
> +
> + switch0phy8: switch0phy8@8 {
> + reg = <0x8>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan1";
> + phy-handle = <&switch0phy1>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan2";
> + phy-handle = <&switch0phy2>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan3";
> + phy-handle = <&switch0phy3>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan4";
> + phy-handle = <&switch0phy4>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "lan5";
> + phy-handle = <&switch0phy5>;
> + };
> +
> + port@6 {
> + reg = <0x6>;
> + label = "lan6";
> + phy-handle = <&switch0phy6>;
> + };
> +
> + port@7 {
> + reg = <0x7>;
> + label = "lan7";
> + phy-handle = <&switch0phy7>;
> + };
> +
> + port@8 {
> + reg = <0x8>;
> + label = "lan8";
> + phy-handle = <&switch0phy8>;
> + };
> +
> + port@9 {
> + reg = <0x9>;
> + label = "cpu";
> + ethernet = <&eth1>;
> + };
> +
> + switch0port10: port@a {
> + reg = <0xa>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch1port9 &switch2port9>;
> + status = "disabled";
> + };
> +
> + port-sfp@a {
> + reg = <0xa>;
> + label = "sfp";
> + sfp = <&sfp>;
> + phy-mode = "sgmii";
> + managed = "in-band-status";
> + status = "disabled";
> + };
> + };
> + };
> +
> + switch0@2 {
> + compatible = "marvell,mv88e6085";
> + reg = <0x2 0>;
> + dsa,member = <0 0>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch0phy1_topaz: switch0phy1@11 {
> + reg = <0x11>;
> + };
> +
> + switch0phy2_topaz: switch0phy2@12 {
> + reg = <0x12>;
> + };
> +
> + switch0phy3_topaz: switch0phy3@13 {
> + reg = <0x13>;
> + };
> +
> + switch0phy4_topaz: switch0phy4@14 {
> + reg = <0x14>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan1";
> + phy-handle = <&switch0phy1_topaz>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan2";
> + phy-handle = <&switch0phy2_topaz>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan3";
> + phy-handle = <&switch0phy3_topaz>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan4";
> + phy-handle = <&switch0phy4_topaz>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "cpu";
> + ethernet = <&eth1>;
> + };
> + };
> + };
> +
> + switch1@11 {
> + compatible = "marvell,mv88e6190";
> + reg = <0x11 0>;
> + dsa,member = <0 1>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch1phy1: switch1phy1@1 {
> + reg = <0x1>;
> + };
> +
> + switch1phy2: switch1phy2@2 {
> + reg = <0x2>;
> + };
> +
> + switch1phy3: switch1phy3@3 {
> + reg = <0x3>;
> + };
> +
> + switch1phy4: switch1phy4@4 {
> + reg = <0x4>;
> + };
> +
> + switch1phy5: switch1phy5@5 {
> + reg = <0x5>;
> + };
> +
> + switch1phy6: switch1phy6@6 {
> + reg = <0x6>;
> + };
> +
> + switch1phy7: switch1phy7@7 {
> + reg = <0x7>;
> + };
> +
> + switch1phy8: switch1phy8@8 {
> + reg = <0x8>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan9";
> + phy-handle = <&switch1phy1>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan10";
> + phy-handle = <&switch1phy2>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan11";
> + phy-handle = <&switch1phy3>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan12";
> + phy-handle = <&switch1phy4>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "lan13";
> + phy-handle = <&switch1phy5>;
> + };
> +
> + port@6 {
> + reg = <0x6>;
> + label = "lan14";
> + phy-handle = <&switch1phy6>;
> + };
> +
> + port@7 {
> + reg = <0x7>;
> + label = "lan15";
> + phy-handle = <&switch1phy7>;
> + };
> +
> + port@8 {
> + reg = <0x8>;
> + label = "lan16";
> + phy-handle = <&switch1phy8>;
> + };
> +
> + switch1port9: port@9 {
> + reg = <0x9>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch0port10>;
> + };
> +
> + switch1port10: port@a {
> + reg = <0xa>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch2port9>;
> + status = "disabled";
> + };
> +
> + port-sfp@a {
> + reg = <0xa>;
> + label = "sfp";
> + sfp = <&sfp>;
> + phy-mode = "sgmii";
> + managed = "in-band-status";
> + status = "disabled";
> + };
> + };
> + };
> +
> + switch1@2 {
> + compatible = "marvell,mv88e6085";
> + reg = <0x2 0>;
> + dsa,member = <0 1>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch1phy1_topaz: switch1phy1@11 {
> + reg = <0x11>;
> + };
> +
> + switch1phy2_topaz: switch1phy2@12 {
> + reg = <0x12>;
> + };
> +
> + switch1phy3_topaz: switch1phy3@13 {
> + reg = <0x13>;
> + };
> +
> + switch1phy4_topaz: switch1phy4@14 {
> + reg = <0x14>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan9";
> + phy-handle = <&switch1phy1_topaz>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan10";
> + phy-handle = <&switch1phy2_topaz>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan11";
> + phy-handle = <&switch1phy3_topaz>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan12";
> + phy-handle = <&switch1phy4_topaz>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch0port10>;
> + };
> + };
> + };
> +
> + switch2@12 {
> + compatible = "marvell,mv88e6190";
> + reg = <0x12 0>;
> + dsa,member = <0 2>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch2phy1: switch2phy1@1 {
> + reg = <0x1>;
> + };
> +
> + switch2phy2: switch2phy2@2 {
> + reg = <0x2>;
> + };
> +
> + switch2phy3: switch2phy3@3 {
> + reg = <0x3>;
> + };
> +
> + switch2phy4: switch2phy4@4 {
> + reg = <0x4>;
> + };
> +
> + switch2phy5: switch2phy5@5 {
> + reg = <0x5>;
> + };
> +
> + switch2phy6: switch2phy6@6 {
> + reg = <0x6>;
> + };
> +
> + switch2phy7: switch2phy7@7 {
> + reg = <0x7>;
> + };
> +
> + switch2phy8: switch2phy8@8 {
> + reg = <0x8>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan17";
> + phy-handle = <&switch2phy1>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan18";
> + phy-handle = <&switch2phy2>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan19";
> + phy-handle = <&switch2phy3>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan20";
> + phy-handle = <&switch2phy4>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "lan21";
> + phy-handle = <&switch2phy5>;
> + };
> +
> + port@6 {
> + reg = <0x6>;
> + label = "lan22";
> + phy-handle = <&switch2phy6>;
> + };
> +
> + port@7 {
> + reg = <0x7>;
> + label = "lan23";
> + phy-handle = <&switch2phy7>;
> + };
> +
> + port@8 {
> + reg = <0x8>;
> + label = "lan24";
> + phy-handle = <&switch2phy8>;
> + };
> +
> + switch2port9: port@9 {
> + reg = <0x9>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch1port10 &switch0port10>;
> + };
> +
> + port-sfp@a {
> + reg = <0xa>;
> + label = "sfp";
> + sfp = <&sfp>;
> + phy-mode = "sgmii";
> + managed = "in-band-status";
> + status = "disabled";
> + };
> + };
> + };
> +
> + switch2@2 {
> + compatible = "marvell,mv88e6085";
> + reg = <0x2 0>;
> + dsa,member = <0 2>;
> + interrupt-parent = <&gpiosb>;
> + interrupts = <5 IRQ_TYPE_EDGE_FALLING>;
> + status = "disabled";
> +
> + mdio {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + switch2phy1_topaz: switch2phy1@11 {
> + reg = <0x11>;
> + };
> +
> + switch2phy2_topaz: switch2phy2@12 {
> + reg = <0x12>;
> + };
> +
> + switch2phy3_topaz: switch2phy3@13 {
> + reg = <0x13>;
> + };
> +
> + switch2phy4_topaz: switch2phy4@14 {
> + reg = <0x14>;
> + };
> + };
> +
> + ports {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + port@1 {
> + reg = <0x1>;
> + label = "lan17";
> + phy-handle = <&switch2phy1_topaz>;
> + };
> +
> + port@2 {
> + reg = <0x2>;
> + label = "lan18";
> + phy-handle = <&switch2phy2_topaz>;
> + };
> +
> + port@3 {
> + reg = <0x3>;
> + label = "lan19";
> + phy-handle = <&switch2phy3_topaz>;
> + };
> +
> + port@4 {
> + reg = <0x4>;
> + label = "lan20";
> + phy-handle = <&switch2phy4_topaz>;
> + };
> +
> + port@5 {
> + reg = <0x5>;
> + label = "dsa";
> + phy-mode = "2500base-x";
> + link = <&switch1port10 &switch0port10>;
> + };
> + };
> + };
> +
> +};
> +
> +&sdhci0 {
> + wp-inverted;
> + bus-width = <4>;
> + cd-gpios = <&gpionb 10 GPIO_ACTIVE_HIGH>;
> + vqmmc-supply = <&vsdc_reg>;
> + marvell,pad-type = "sd";
> + status = "okay";
> +};
> +
> +&sdhci1 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&sdio0_pins &sdio_sb_pins>;
> + non-removable;
> + bus-width = <4>;
> + marvell,pad-type = "sd";
> + vqmmc-supply = <&vsdio_reg>;
> + status = "okay";
> +};
> +
> +&spi0 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&spi_quad_pins &spi_cs1_pins>;
> + assigned-clocks = <&nb_periph_clk 7>;
> + assigned-clock-parents = <&tbg 1>;
> + assigned-clock-rates = <20000000>;
> +
> + spi-flash@0 {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + compatible = "jedec,spi-nor";
> + reg = <0>;
> + spi-max-frequency = <2000000>;
> +
> + partition@0 {
> + label = "u-boot";
> + reg = <0x0 0x3f0000>;
> + };
> +
> + partition@3f0000 {
> + label = "u-boot-env";
> + reg = <0x180000 0x10000>;
> + };
> +
> + partition@400000 {
> + label = "Rescue system";
> + reg = <0x190000 0x670000>;
> + };
> + };
> +
> + moxtet@1 {
> + #address-cells = <1>;
> + #size-cells = <0>;
> + compatible = "cznic,moxtet";
> + reg = <1>;
> + devrst-gpio = <&gpiosb 2 GPIO_ACTIVE_LOW>;
> + spi-max-frequency = <1000000>;
> + spi-cpol;
> + spi-cpha;
> +
> + moxtet_sfp: moxtet-sfp@0 {
> + compatible = "cznic,moxtet-gpio";
> + gpio-controller;
> + #gpio-cells = <2>;
> + reg = <0>;
> + moxtet,id = <1>;
> + moxtet,input-mask = <0x7>;
> + moxtet,output-mask = <0x3>;
> + status = "disabled";
> + };
> + };
> +};
> +
> +&usb3 {
> + status = "okay";
> + usb-phy = <&usb3_phy>;
> +};
> --
> 2.16.4
>

--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com