diff options
author | Christoph Niedermaier <cniedermaier@dh-electronics.com> | 2021-08-02 16:10:38 +0200 |
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committer | Shawn Guo <shawnguo@kernel.org> | 2021-08-09 15:39:58 +0800 |
commit | a0c1748f365328f0b0ce104edf3f8a6fb5ab4f2c (patch) | |
tree | d3e81a3f386a2743589086fc74e7424646da1dd3 /arch/arm/boot | |
parent | 317d26e92161c434a25d14584d35630894061b50 (diff) | |
download | lwn-a0c1748f365328f0b0ce104edf3f8a6fb5ab4f2c.tar.gz lwn-a0c1748f365328f0b0ce104edf3f8a6fb5ab4f2c.zip |
ARM: dts: imx6qdl-dhcom: Add DHSOM based DRC02 board
Add DT for DH DRC02 unit, which is a universal controller device.
The system has two ethernet ports, two CANs, RS485 and RS232, USB,
capacitive buttons and an OLED display.
Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Fabio Estevam <festevam@denx.de>
Cc: Marek Vasut <marex@denx.de>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: kernel@dh-electronics.com
To: linux-arm-kernel@lists.infradead.org
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'arch/arm/boot')
-rw-r--r-- | arch/arm/boot/dts/Makefile | 3 | ||||
-rw-r--r-- | arch/arm/boot/dts/imx6qdl-dhcom-drc02.dtsi | 139 | ||||
-rw-r--r-- | arch/arm/boot/dts/imx6s-dhcom-drc02.dts | 30 |
3 files changed, 171 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile index 199bc106627c..bcd1f3853b7d 100644 --- a/arch/arm/boot/dts/Makefile +++ b/arch/arm/boot/dts/Makefile @@ -610,7 +610,8 @@ dtb-$(CONFIG_SOC_IMX6Q) += \ imx6qp-tx6qp-8137-mb7.dtb \ imx6qp-vicutp.dtb \ imx6qp-wandboard-revd1.dtb \ - imx6qp-zii-rdu2.dtb + imx6qp-zii-rdu2.dtb \ + imx6s-dhcom-drc02.dtb dtb-$(CONFIG_SOC_IMX6SL) += \ imx6sl-evk.dtb \ imx6sl-tolino-shine2hd.dtb \ diff --git a/arch/arm/boot/dts/imx6qdl-dhcom-drc02.dtsi b/arch/arm/boot/dts/imx6qdl-dhcom-drc02.dtsi new file mode 100644 index 000000000000..3d0a50a9ab21 --- /dev/null +++ b/arch/arm/boot/dts/imx6qdl-dhcom-drc02.dtsi @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2021 DH electronics GmbH + */ + +/ { + chosen { + stdout-path = "serial0:115200n8"; + }; +}; + +/* + * Special SoM hardware required which uses the pins from micro SD card. The + * pins SD3_DAT0 and SD3_DAT1 are muxed as can2 Tx and Rx. The signals for can2 + * Tx and Rx are routed to the DHCOM UART1 rts/cts pins. Therefore the micro SD + * card must be disabled and the uart1 rts/cts must be output on other DHCOM + * pins, see uart1 and usdhc3 node below. + */ +&can2 { + status = "okay"; +}; + +&gpio1 { + /* + * NOTE: On DRC02, the RS485_RX_En is controlled by a separate + * GPIO line, however the i.MX6 UART driver assumes RX happens + * during TX anyway and that it only controls drive enable DE + * line. Hence, the RX is always enabled here. + */ + rs485-rx-en-hog { + gpio-hog; + gpios = <18 0>; /* GPIO Q */ + line-name = "rs485-rx-en"; + output-low; + }; +}; + +&gpio3 { + gpio-line-names = + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", "", + "", "", "", "DRC02-In1", "", "", "", ""; +}; + +&gpio4 { + gpio-line-names = + "", "", "", "", "", "DHCOM-E", "DRC02-In2", "DHCOM-H", + "DHCOM-I", "DRC02-HW0", "", "", "", "", "", "", + "", "", "", "", "DRC02-Out1", "", "", "", + "", "", "", "", "", "", "", ""; +}; + +&gpio6 { + gpio-line-names = + "", "", "", "DRC02-Out2", "", "", "SOM-HW1", "", + "", "", "", "", "", "", "DRC02-HW2", "DRC02-HW1", + "", "", "", "", "", "", "", "", + "", "", "", "", "", "", "", ""; +}; + +&i2c1 { + eeprom@50 { + compatible = "atmel,24c04"; + reg = <0x50>; + pagesize = <16>; + }; +}; + +&uart1 { + /* + * Due to the use of can2 the signals for can2 Tx and Rx are routed to + * DHCOM UART1 rts/cts pins. Therefore this UART have to use DHCOM GPIOs + * for rts/cts. So configure DHCOM GPIO I as rts and GPIO M as cts. + */ + /delete-property/ uart-has-rtscts; + cts-gpios = <&gpio7 0 GPIO_ACTIVE_HIGH>; /* GPIO M */ + pinctrl-0 = <&pinctrl_uart1 &pinctrl_dhcom_i &pinctrl_dhcom_m>; + pinctrl-names = "default"; + rts-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>; /* GPIO I */ +}; + +&uart5 { + /* + * On DRC02 this UART is used as RS485 interface and RS485_TX_En is + * controlled by DHCOM GPIO P. So remove rts/cts pins and the property + * uart-has-rtscts from this UART and add the DHCOM GPIO P pin via + * rts-gpios. The RS485_RX_En is controlled by DHCOM GPIO Q, see gpio1 + * node above. + */ + /delete-property/ uart-has-rtscts; + linux,rs485-enabled-at-boot-time; + pinctrl-0 = <&pinctrl_uart5_core &pinctrl_dhcom_p &pinctrl_dhcom_q>; + pinctrl-names = "default"; + rts-gpios = <&gpio7 13 GPIO_ACTIVE_HIGH>; /* GPIO P */ +}; + +&usdhc2 { /* SD card */ + status = "okay"; +}; + +&usdhc3 { + /* + * Due to the use of can2 the micro SD card on module have to be + * disabled, because the pins SD3_DAT0 and SD3_DAT1 are muxed as + * can2 Tx and Rx. + */ + status = "disabled"; +}; + +&iomuxc { + pinctrl-0 = < + /* + * The following DHCOM GPIOs are used on this board. + * Therefore, they have been removed from the list below. + * I: uart1 rts + * M: uart1 cts + * P: uart5 rs485-tx-en + * Q: uart5 rs485-rx-en + */ + &pinctrl_hog_base + &pinctrl_dhcom_a &pinctrl_dhcom_b &pinctrl_dhcom_c + &pinctrl_dhcom_d &pinctrl_dhcom_e &pinctrl_dhcom_f + &pinctrl_dhcom_g &pinctrl_dhcom_h + &pinctrl_dhcom_j &pinctrl_dhcom_k &pinctrl_dhcom_l + &pinctrl_dhcom_n &pinctrl_dhcom_o + &pinctrl_dhcom_r + &pinctrl_dhcom_s &pinctrl_dhcom_t &pinctrl_dhcom_u + &pinctrl_dhcom_v &pinctrl_dhcom_w &pinctrl_dhcom_int + >; + pinctrl-names = "default"; + + pinctrl_uart5_core: uart5-core-grp { + fsl,pins = < + MX6QDL_PAD_CSI0_DAT14__UART5_TX_DATA 0x1b0b1 + MX6QDL_PAD_CSI0_DAT15__UART5_RX_DATA 0x1b0b1 + >; + }; +}; diff --git a/arch/arm/boot/dts/imx6s-dhcom-drc02.dts b/arch/arm/boot/dts/imx6s-dhcom-drc02.dts new file mode 100644 index 000000000000..4077b607c29e --- /dev/null +++ b/arch/arm/boot/dts/imx6s-dhcom-drc02.dts @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2021 DH electronics GmbH + * + * DHCOM iMX6 variant: + * DHCM-iMX6S-C0800-R102-F0409-E-CAN2-RTC-I-01D2 + * DHCOM PCB number: 493-400 or newer + * DRC02 PCB number: 568-100 or newer + */ +/dts-v1/; + +/* + * The kernel only distinguishes between i.MX6 Quad and DualLite, + * but the Solo is actually a DualLite with only one CPU. So use + * DualLite for the Solo and disable one CPU node. + */ + +#include "imx6dl.dtsi" +#include "imx6qdl-dhcom-som.dtsi" +#include "imx6qdl-dhcom-drc02.dtsi" + +/ { + model = "DH electronics i.MX6S DHCOM on DRC02"; + compatible = "dh,imx6s-dhcom-drc02", "dh,imx6s-dhcom-som", + "fsl,imx6dl"; + + cpus { + /delete-node/ cpu@1; + }; +}; |