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|
// 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
>;
};
};
|
