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Message-ID: <20180922144103.479b64f6@jawa>
Date: Sat, 22 Sep 2018 14:41:03 +0200
From: Lukasz Majewski <lukma@...x.de>
To: Stefan Agner <stefan@...er.ch>
Cc: Shawn Guo <shawnguo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Sascha Hauer <s.hauer@...gutronix.de>,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org,
Pengutronix Kernel Team <kernel@...gutronix.de>,
Fabio Estevam <festevam@...il.com>,
Fabio Estevam <fabio.estevam@....com>
Subject: Re: [PATCH] ARM: dts: Add support for Liebherr's BK4 device (vf610
based)
Hi Stefan,
Thanks for review,
> On 21.09.2018 08:27, Lukasz Majewski wrote:
> > This commit adds DTS support for BK4 device from Liebherr. It
> > uses vf610 SoC from NXP.
> >
> > Signed-off-by: Lukasz Majewski <lukma@...x.de>
> > ---
> > arch/arm/boot/dts/Makefile | 1 +
> > arch/arm/boot/dts/vf610-bk4.dts | 504
> > ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 505
> > insertions(+) create mode 100644 arch/arm/boot/dts/vf610-bk4.dts
> >
> > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> > index b5bd3de87c33..e6f159895fa9 100644
> > --- a/arch/arm/boot/dts/Makefile
> > +++ b/arch/arm/boot/dts/Makefile
> > @@ -577,6 +577,7 @@ dtb-$(CONFIG_SOC_LS1021A) += \
> > ls1021a-twr.dtb
> > dtb-$(CONFIG_SOC_VF610) += \
> > vf500-colibri-eval-v3.dtb \
> > + vf610-bk4.dtb \
> > vf610-colibri-eval-v3.dtb \
> > vf610m4-colibri.dtb \
> > vf610-cosmic.dtb \
> > diff --git a/arch/arm/boot/dts/vf610-bk4.dts
> > b/arch/arm/boot/dts/vf610-bk4.dts new file mode 100644
> > index 000000000000..4ad7e739a0ad
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/vf610-bk4.dts
> > @@ -0,0 +1,504 @@
> > +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> > +/*
> > + * Copyright 2018
> > + * Lukasz Majewski, DENX Software Engineering, lukma@...x.de
> > + */
> > +
> > +/dts-v1/;
> > +#include "vf610.dtsi"
> > +
> > +/ {
> > + model = "Liebherr BK4 controller";
> > + compatible = "lwn,bk4", "fsl,vf610";
> > +
> > + chosen {
> > + bootargs = "console=ttyLP1,115200";
> > + };
> > +
> > + memory@...00000 {
> > + reg = <0x80000000 0x8000000>;
> > + };
> > +
> > + audio_ext: mclk_osc {
>
> Node name should be somewhat generic. I know its the same in twr
> board, we probably should fix it there. The device tree spec has some
> recommendation, I would suggest using just "oscillator-audio".
So it shall be audio_ext: oscillator-audio { ...
>
> > + compatible = "fixed-clock";
> > + #clock-cells = <0>;
> > + clock-frequency = <24576000>;
> > + };
> > +
> > + enet_ext: eth_osc {
>
> Same here, oscillator-ethernet maybe.
Ok - enet_ext: oscillator-ethernet { ...
>
>
> > + compatible = "fixed-clock";
> > + #clock-cells = <0>;
> > + clock-frequency = <50000000>;
> > + };
> > +
> > + leds {
> > + compatible = "gpio-leds";
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_gpio_leds>;
> > +
> > + /* LED D5 */
> > + led0: heartbeat {
> > + label = "heartbeat";
> > + gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
> > + default-state = "on";
> > + linux,default-trigger = "heartbeat";
> > + };
> > + };
> > +
> > + regulators {
> > + compatible = "simple-bus";
> > + #address-cells = <1>;
> > + #size-cells = <0>;
>
> We stopped using a regulator subnode. Just move the regulators to the
> top and use unique names such as "regulator-3p3v".
Ok.
>
> > +
> > + reg_3p3v: regulator@0 {
> > + compatible = "regulator-fixed";
> > + reg = <0>;
> > + regulator-name = "3P3V";
> > + regulator-min-microvolt = <3300000>;
> > + regulator-max-microvolt = <3300000>;
> > + regulator-always-on;
> > + };
> > +
> > + reg_vcc_3v3_mcu: regulator@1 {
> > + compatible = "regulator-fixed";
> > + reg = <1>;
> > + regulator-name = "vcc_3v3_mcu";
> > + regulator-min-microvolt = <3300000>;
> > + regulator-max-microvolt = <3300000>;
> > + };
> > + };
> > +};
> > +
> > +&adc0 {
> > + vref-supply = <®_vcc_3v3_mcu>;
> > + status = "okay";
> > +};
> > +
> > +&adc1 {
> > + vref-supply = <®_vcc_3v3_mcu>;
> > + status = "okay";
> > +};
> > +
> > +&can0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_can0>;
> > + status = "okay";
> > +};
> > +
> > +&can1 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_can1>;
> > + status = "okay";
> > +};
> > +
> > +&clks {
> > + clocks = <&sxosc>, <&fxosc>, <&enet_ext>, <&audio_ext>;
> > + clock-names = "sxosc", "fxosc", "enet_ext", "audio_ext";
> > +};
> > +
> > +&dspi0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_dspi0>;
> > + bus-num = <0>;
> > + status = "okay";
> > +
> > + spidev0@0 {
> > + compatible = "fsl,vf610-dspi";
>
> I don't think this is right. A subnode of the dspi controller should
> use a device tree binding of SPI device. What is connected to that
> SPI in your case?
The dspi IP block provides SPI communication with variety of devices
(connected via external cable).
From SW point of view, the spidev driver is used. User space program(s)
via the /dev/spidevX.Y device communicate with connected HW.
I would need "just" to add:
+ { .compatible = "fsl,vf610-dspi" },
in drivers/spi/spidev.c
I'm wondering what is the actual policy - such "adjustments" are in the
end very board specific.
>
> > + spi-max-frequency = <30000000>;
> > + reg = <0>;
> > + fsl,spi-cs-sck-delay = <200>;
> > + fsl,spi-sck-cs-delay = <400>;
> > + };
> > +};
> > +
> > +&dspi3 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_dspi3>;
> > + bus-num = <3>;
> > + status = "okay";
> > +
> > + spidev3@0 {
> > + compatible = "fsl,vf610-dspi";
>
> Same here...
>
> > + spi-max-frequency = <30000000>;
> > + reg = <0>;
> > + fsl,spi-slave-mode;
> > + };
> > +};
> > +
> > +&edma0 {
> > + status = "okay";
> > +};
> > +
> > +&edma1 {
> > + status = "okay";
> > +};
> > +
> > +&esdhc1 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_esdhc1>;
> > + bus-width = <4>;
> > + cd-gpios = <&gpio3 2 GPIO_ACTIVE_LOW>;
> > + status = "okay";
> > +};
> > +
> > +&fec0 {
> > + phy-mode = "rmii";
> > + phy-handle = <ðphy0>;
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_fec0>;
> > + status = "okay";
> > +
> > + mdio {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + ethphy0: ethernet-phy@1 {
> > + reg = <1>;
> > + clocks = <&clks VF610_CLK_ENET_50M>;
> > + clock-names = "rmii-ref";
> > + };
> > + };
> > +};
> > +
> > +&fec1 {
> > + phy-mode = "rmii";
> > + phy-handle = <ðphy1>;
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_fec1>;
> > + status = "okay";
> > +
> > + mdio {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + ethphy1: ethernet-phy@1 {
> > + reg = <1>;
> > + clocks = <&clks VF610_CLK_ENET_50M>;
> > + clock-names = "rmii-ref";
> > + };
> > + };
> > +};
> > +
> > +&i2c2 {
> > + clock-frequency = <400000>;
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_i2c2>;
> > + status = "okay";
> > +
> > + eeprom: eeprom@50 {
> > + compatible = "at24,24c256";
> > + reg = <0x50>;
> > + };
> > +
> > + rtc: rtc@68 {
> > + compatible = "stm,rv4162";
> > + reg = <0x68>;
> > + };
> > +};
> > +
> > +&iomuxc {
>
> This node should go to the very end since it is so large..
I'm not sure - last time I've submitted DTS for imx6q board the
maintainer required to make it _all_ alphabetically sorted.
(I haven't heard about the rule to put some node to the end of file
because of its size).
>
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_bk4_common>;
> > +
> > + pinctrl_bk4_common: commongrp {
>
> Are those pins all controlled from user space?
Yes, they are used by user space programs.
> If they are controlled
> by a particular kernel driver, you should add those pins to the
> pinctrl node assigned to the particular device tree node.
Yes, I'm aware of that.
>
> --
> Stefan
>
> > + fsl,pins = <
> > + /* One_Wire_PSU_EN */
> > + VF610_PAD_PTC29__GPIO_102
> > 0x1183
> > + /* SPI */
> > + VF610_PAD_PTB26__GPIO_96
> > 0x1183
> > + VF610_PAD_PTE14__GPIO_119
> > 0x1183
> > + VF610_PAD_PTE4__GPIO_109
> > 0x1181
> > + /* Feedback_Lines */
> > + VF610_PAD_PTC31__GPIO_104
> > 0x1181
> > + VF610_PAD_PTA7__GPIO_134
> > 0x1181
> > + VF610_PAD_PTD9__GPIO_88
> > 0x1181
> > + VF610_PAD_PTE1__GPIO_106
> > 0x1183
> > + VF610_PAD_PTB2__GPIO_24
> > 0x1181
> > + VF610_PAD_PTB3__GPIO_25
> > 0x1181
> > + VF610_PAD_PTB1__GPIO_23
> > 0x1181
> > + /* SDHC */
> > + VF610_PAD_PTE19__GPIO_124
> > 0x1183
> > + VF610_PAD_PTB23__GPIO_93
> > 0x1181
> > + /* GPI */
> > + VF610_PAD_PTE2__GPIO_107
> > 0x1181
> > + VF610_PAD_PTE3__GPIO_108
> > 0x1181
> > + VF610_PAD_PTE5__GPIO_110
> > 0x1181
> > + VF610_PAD_PTE6__GPIO_111
> > 0x1181
> > + /* GPO */
> > + VF610_PAD_PTE0__GPIO_105
> > 0x1183
> > + VF610_PAD_PTE7__GPIO_112
> > 0x1183
> > + /* RS485 */
> > + VF610_PAD_PTB8__GPIO_30
> > 0x1183
> > + VF610_PAD_PTB9__GPIO_31
> > 0x1183
> > + VF610_PAD_PTE8__GPIO_113
> > 0x1183
> > + /* MPBUS MPB_EN */
> > + VF610_PAD_PTE28__GPIO_133
> > 0x1183
> > + /* LEDS */
> > + VF610_PAD_PTE15__GPIO_120
> > 0x1183
> > + VF610_PAD_PTA12__GPIO_5
> > 0x1183
> > + VF610_PAD_PTA16__GPIO_6
> > 0x1183
> > + VF610_PAD_PTE9__GPIO_114
> > 0x1183
> > + VF610_PAD_PTE20__GPIO_125
> > 0x1183
> > + VF610_PAD_PTE23__GPIO_128
> > 0x1183
> > + VF610_PAD_PTE16__GPIO_121
> > 0x1183
> > + /* MISC */
> > + VF610_PAD_PTE10__GPIO_115
> > 0x1183
> > + VF610_PAD_PTE11__GPIO_116
> > 0x1183
> > + VF610_PAD_PTE17__GPIO_122
> > 0x1183
> > + VF610_PAD_PTC30__GPIO_103
> > 0x1183
> > + VF610_PAD_PTB0__GPIO_22
> > 0x1181
> > + /* RESETINFO */
> > + VF610_PAD_PTE26__GPIO_131
> > 0x1183
> > + VF610_PAD_PTD6__GPIO_85
> > 0x1181
> > + VF610_PAD_PTE27__GPIO_132
> > 0x1181
> > + VF610_PAD_PTE13__GPIO_118
> > 0x1181
> > + VF610_PAD_PTE21__GPIO_126
> > 0x1181
> > + VF610_PAD_PTE22__GPIO_127
> > 0x1181
> > + /* EE_5V_EN */
> > + VF610_PAD_PTE18__GPIO_123
> > 0x1183
> > + /* EE_5V_OC_N */
> > + VF610_PAD_PTE25__GPIO_130
> > 0x1181
> > + >;
> > + };
> > +
> > + pinctrl_can0: can0grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB14__CAN0_RX
> > 0x1181
> > + VF610_PAD_PTB15__CAN0_TX
> > 0x1182
> > + >;
> > + };
> > +
> > + pinctrl_can1: can1grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB16__CAN1_RX
> > 0x1181
> > + VF610_PAD_PTB17__CAN1_TX
> > 0x1182
> > + >;
> > + };
> > +
> > + pinctrl_dspi0: dspi0grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB18__DSPI0_CS1
> > 0x1182
> > + VF610_PAD_PTB19__DSPI0_CS0
> > 0x1182
> > + VF610_PAD_PTB20__DSPI0_SIN
> > 0x1181
> > + VF610_PAD_PTB21__DSPI0_SOUT
> > 0x1182
> > + VF610_PAD_PTB22__DSPI0_SCK
> > 0x1182
> > + >;
> > + };
> > +
> > + pinctrl_dspi3: dspi3grp {
> > + fsl,pins = <
> > + VF610_PAD_PTD10__DSPI3_CS0
> > 0x1181
> > + VF610_PAD_PTD11__DSPI3_SIN
> > 0x1181
> > + VF610_PAD_PTD12__DSPI3_SOUT
> > 0x1182
> > + VF610_PAD_PTD13__DSPI3_SCK
> > 0x1181
> > + >;
> > + };
> > +
> > + pinctrl_esdhc1: esdhc1grp {
> > + fsl,pins = <
> > + VF610_PAD_PTA24__ESDHC1_CLK
> > 0x31ef
> > + VF610_PAD_PTA25__ESDHC1_CMD
> > 0x31ef
> > +
> > VF610_PAD_PTA26__ESDHC1_DAT0 0x31ef
> > +
> > VF610_PAD_PTA27__ESDHC1_DAT1 0x31ef
> > +
> > VF610_PAD_PTA28__ESDHC1_DATA2 0x31ef
> > +
> > VF610_PAD_PTA29__ESDHC1_DAT3 0x31ef
> > + VF610_PAD_PTB28__GPIO_98
> > 0x219d
> > + >;
> > + };
> > +
> > + pinctrl_fec0: fec0grp {
> > + fsl,pins = <
> > + VF610_PAD_PTA6__RMII_CLKIN
> > 0x30dd
> > +
> > VF610_PAD_PTC0__ENET_RMII0_MDC 0x30de
> > + VF610_PAD_PTC1__ENET_RMII0_MDIO
> > 0x30df
> > +
> > VF610_PAD_PTC2__ENET_RMII0_CRS 0x30dd
> > + VF610_PAD_PTC3__ENET_RMII0_RXD1
> > 0x30dd
> > + VF610_PAD_PTC4__ENET_RMII0_RXD0
> > 0x30dd
> > + VF610_PAD_PTC5__ENET_RMII0_RXER
> > 0x30dd
> > + VF610_PAD_PTC6__ENET_RMII0_TXD1
> > 0x30de
> > + VF610_PAD_PTC7__ENET_RMII0_TXD0
> > 0x30de
> > + VF610_PAD_PTC8__ENET_RMII0_TXEN
> > 0x30de
> > + >;
> > + };
> > +
> > + pinctrl_fec1: fec1grp {
> > + fsl,pins = <
> > +
> > VF610_PAD_PTC9__ENET_RMII1_MDC 0x30de
> > + VF610_PAD_PTC10__ENET_RMII1_MDIO
> > 0x30df
> > + VF610_PAD_PTC11__ENET_RMII1_CRS
> > 0x30dd
> > + VF610_PAD_PTC12__ENET_RMII1_RXD1
> > 0x30dd
> > + VF610_PAD_PTC13__ENET_RMII1_RXD0
> > 0x30dd
> > + VF610_PAD_PTC14__ENET_RMII1_RXER
> > 0x30dd
> > + VF610_PAD_PTC15__ENET_RMII1_TXD1
> > 0x30de
> > + VF610_PAD_PTC16__ENET_RMII1_TXD0
> > 0x30de
> > + VF610_PAD_PTC17__ENET_RMII1_TXEN
> > 0x30de
> > + >;
> > + };
> > +
> > + pinctrl_gpio_leds: gpio_leds {
> > + fsl,pins = <
> > + VF610_PAD_PTE12__GPIO_117 0x1183
> > + >;
> > + };
> > +
> > + pinctrl_i2c2: i2c2grp {
> > + fsl,pins = <
> > + VF610_PAD_PTA22__I2C2_SCL
> > 0x34df
> > + VF610_PAD_PTA23__I2C2_SDA
> > 0x34df
> > + >;
> > + };
> > +
> > + pinctrl_nfc: nfcgrp {
> > + fsl,pins = <
> > + VF610_PAD_PTD23__NF_IO7
> > 0x28df
> > + VF610_PAD_PTD22__NF_IO6
> > 0x28df
> > + VF610_PAD_PTD21__NF_IO5
> > 0x28df
> > + VF610_PAD_PTD20__NF_IO4
> > 0x28df
> > + VF610_PAD_PTD19__NF_IO3
> > 0x28df
> > + VF610_PAD_PTD18__NF_IO2
> > 0x28df
> > + VF610_PAD_PTD17__NF_IO1
> > 0x28df
> > + VF610_PAD_PTD16__NF_IO0
> > 0x28df
> > + VF610_PAD_PTB24__NF_WE_B
> > 0x28c2
> > + VF610_PAD_PTB25__NF_CE0_B
> > 0x28c2
> > + VF610_PAD_PTB27__NF_RE_B
> > 0x28c2
> > + VF610_PAD_PTC26__NF_RB_B
> > 0x283d
> > + VF610_PAD_PTC27__NF_ALE
> > 0x28c2
> > + VF610_PAD_PTC28__NF_CLE
> > 0x28c2
> > + >;
> > + };
> > +
> > + pinctrl_uart0: uart0grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB10__UART0_TX
> > 0x21a2
> > + VF610_PAD_PTB11__UART0_RX
> > 0x21a1
> > + >;
> > + };
> > +
> > + pinctrl_uart1: uart1grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB4__UART1_TX
> > 0x21a2
> > + VF610_PAD_PTB5__UART1_RX
> > 0x21a1
> > + >;
> > + };
> > +
> > + pinctrl_uart2: uart2grp {
> > + fsl,pins = <
> > + VF610_PAD_PTB6__UART2_TX
> > 0x21a2
> > + VF610_PAD_PTB7__UART2_RX
> > 0x21a1
> > + >;
> > + };
> > +
> > + pinctrl_uart3: uart3grp {
> > + fsl,pins = <
> > + VF610_PAD_PTA20__UART3_TX
> > 0x21a2
> > + VF610_PAD_PTA21__UART3_RX
> > 0x21a1
> > + >;
> > + };
> > +
> > + pinctrl_qspi0: qspi0grp {
> > + fsl,pins = <
> > + VF610_PAD_PTD0__QSPI0_A_QSCK 0x397f
> > + VF610_PAD_PTD1__QSPI0_A_CS0 0x397f
> > + VF610_PAD_PTD2__QSPI0_A_DATA3 0x397f
> > + VF610_PAD_PTD3__QSPI0_A_DATA2 0x397f
> > + VF610_PAD_PTD4__QSPI0_A_DATA1 0x397f
> > + VF610_PAD_PTD5__QSPI0_A_DATA0 0x397f
> > + VF610_PAD_PTD7__QSPI0_B_QSCK 0x397f
> > + VF610_PAD_PTD8__QSPI0_B_CS0 0x397f
> > + VF610_PAD_PTD11__QSPI0_B_DATA1
> > 0x397f
> > + VF610_PAD_PTD12__QSPI0_B_DATA0
> > 0x397f
> > + >;
> > + };
> > +};
> > +
> > +&nfc {
> > + assigned-clocks = <&clks VF610_CLK_NFC>;
> > + assigned-clock-rates = <33000000>;
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_nfc>;
> > + status = "okay";
> > +
> > + nand@0 {
> > + compatible = "fsl,vf610-nfc-nandcs";
> > + reg = <0>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + nand-bus-width = <16>;
> > + nand-ecc-mode = "hw";
> > + nand-ecc-strength = <24>;
> > + nand-ecc-step-size = <2048>;
> > + nand-on-flash-bbt;
> > + };
> > +};
> > +
> > +&uart0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_uart0>;
> > + status = "okay";
> > +};
> > +
> > +&uart1 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_uart1>;
> > + status = "okay";
> > +};
> > +
> > +&uart2 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_uart2>;
> > + status = "okay";
> > +};
> > +
> > +&uart3 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_uart3>;
> > + status = "okay";
> > +};
> > +
> > +&usbdev0 {
> > + disable-over-current;
> > + status = "okay";
> > +};
> > +
> > +&usbh1 {
> > + disable-over-current;
> > + status = "okay";
> > +};
> > +
> > +&usbmisc0 {
> > + status = "okay";
> > +};
> > +
> > +&usbmisc1 {
> > + status = "okay";
> > +};
> > +
> > +&usbphy0 {
> > + status = "okay";
> > +};
> > +
> > +&usbphy1 {
> > + status = "okay";
> > +};
> > +
> > +&qspi0 {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&pinctrl_qspi0>;
> > + status = "okay";
> > +
> > + flash0: n25q128a13@0 {
> > + compatible = "n25q128a13", "jedec,spi-nor";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + spi-max-frequency = <66000000>;
> > + spi-rx-bus-width = <4>;
> > + reg = <0>;
> > + };
> > +
> > + flash1: n25q128a13@1 {
> > + compatible = "n25q128a13", "jedec,spi-nor";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + spi-max-frequency = <66000000>;
> > + spi-rx-bus-width = <2>;
> > + reg = <1>;
> > + };
> > +};
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@...x.de
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