1// SPDX-License-Identifier: GPL-2.0+ 2/* 3 * Copyright (C) 2021 DH electronics GmbH 4 */ 5 6/ { 7 chosen { 8 stdout-path = "serial0:115200n8"; 9 }; 10}; 11 12/* 13 * Special SoM hardware required which uses the pins from micro SD card. The 14 * pins SD3_DAT0 and SD3_DAT1 are muxed as can2 Tx and Rx. The signals for can2 15 * Tx and Rx are routed to the DHCOM UART1 rts/cts pins. Therefore the micro SD 16 * card must be disabled and the uart1 rts/cts must be output on other DHCOM 17 * pins, see uart1 and usdhc3 node below. 18 */ 19&can2 { 20 status = "okay"; 21}; 22 23&gpio1 { 24 /* 25 * NOTE: On DRC02, the RS485_RX_En is controlled by a separate 26 * GPIO line, however the i.MX6 UART driver assumes RX happens 27 * during TX anyway and that it only controls drive enable DE 28 * line. Hence, the RX is always enabled here. 29 */ 30 rs485-rx-en-hog { 31 gpio-hog; 32 gpios = <18 0>; /* GPIO Q */ 33 line-name = "rs485-rx-en"; 34 output-low; 35 }; 36}; 37 38&gpio3 { 39 gpio-line-names = 40 "", "", "", "", "", "", "", "", 41 "", "", "", "", "", "", "", "", 42 "", "", "", "", "", "", "", "", 43 "", "", "", "DRC02-In1", "", "", "", ""; 44}; 45 46&gpio4 { 47 gpio-line-names = 48 "", "", "", "", "", "DHCOM-E", "DRC02-In2", "DHCOM-H", 49 "DHCOM-I", "DRC02-HW0", "", "", "", "", "", "", 50 "", "", "", "", "DRC02-Out1", "", "", "", 51 "", "", "", "", "", "", "", ""; 52}; 53 54&gpio6 { 55 gpio-line-names = 56 "", "", "", "DRC02-Out2", "", "", "SOM-HW1", "", 57 "", "", "", "", "", "", "DRC02-HW2", "DRC02-HW1", 58 "", "", "", "", "", "", "", "", 59 "", "", "", "", "", "", "", ""; 60}; 61 62&i2c1 { 63 eeprom@50 { 64 compatible = "atmel,24c04"; 65 reg = <0x50>; 66 pagesize = <16>; 67 }; 68}; 69 70&uart1 { 71 /* 72 * Due to the use of can2 the signals for can2 Tx and Rx are routed to 73 * DHCOM UART1 rts/cts pins. Therefore this UART have to use DHCOM GPIOs 74 * for rts/cts. So configure DHCOM GPIO I as rts and GPIO M as cts. 75 */ 76 /delete-property/ uart-has-rtscts; 77 cts-gpios = <&gpio7 0 GPIO_ACTIVE_HIGH>; /* GPIO M */ 78 pinctrl-0 = <&pinctrl_uart1 &pinctrl_dhcom_i &pinctrl_dhcom_m>; 79 pinctrl-names = "default"; 80 rts-gpios = <&gpio4 8 GPIO_ACTIVE_HIGH>; /* GPIO I */ 81}; 82 83&uart5 { 84 /* 85 * On DRC02 this UART is used as RS485 interface and RS485_TX_En is 86 * controlled by DHCOM GPIO P. So remove rts/cts pins and the property 87 * uart-has-rtscts from this UART and add the DHCOM GPIO P pin via 88 * rts-gpios. The RS485_RX_En is controlled by DHCOM GPIO Q, see gpio1 89 * node above. 90 */ 91 /delete-property/ uart-has-rtscts; 92 linux,rs485-enabled-at-boot-time; 93 pinctrl-0 = <&pinctrl_uart5_core &pinctrl_dhcom_p &pinctrl_dhcom_q>; 94 pinctrl-names = "default"; 95 rts-gpios = <&gpio7 13 GPIO_ACTIVE_HIGH>; /* GPIO P */ 96}; 97 98&usbh1 { 99 disable-over-current; 100}; 101 102&usdhc2 { /* SD card */ 103 status = "okay"; 104}; 105 106&usdhc3 { 107 /* 108 * Due to the use of can2 the micro SD card on module have to be 109 * disabled, because the pins SD3_DAT0 and SD3_DAT1 are muxed as 110 * can2 Tx and Rx. 111 */ 112 status = "disabled"; 113}; 114 115&iomuxc { 116 pinctrl-0 = < 117 /* 118 * The following DHCOM GPIOs are used on this board. 119 * Therefore, they have been removed from the list below. 120 * I: uart1 rts 121 * M: uart1 cts 122 * P: uart5 rs485-tx-en 123 * Q: uart5 rs485-rx-en 124 */ 125 &pinctrl_hog_base 126 &pinctrl_dhcom_a &pinctrl_dhcom_b &pinctrl_dhcom_c 127 &pinctrl_dhcom_d &pinctrl_dhcom_e &pinctrl_dhcom_f 128 &pinctrl_dhcom_g &pinctrl_dhcom_h 129 &pinctrl_dhcom_j &pinctrl_dhcom_k &pinctrl_dhcom_l 130 &pinctrl_dhcom_n &pinctrl_dhcom_o 131 &pinctrl_dhcom_r 132 &pinctrl_dhcom_s &pinctrl_dhcom_t &pinctrl_dhcom_u 133 &pinctrl_dhcom_v &pinctrl_dhcom_w &pinctrl_dhcom_int 134 >; 135 pinctrl-names = "default"; 136 137 pinctrl_uart5_core: uart5-core-grp { 138 fsl,pins = < 139 MX6QDL_PAD_CSI0_DAT14__UART5_TX_DATA 0x1b0b1 140 MX6QDL_PAD_CSI0_DAT15__UART5_RX_DATA 0x1b0b1 141 >; 142 }; 143}; 144