Armadilloフォーラム

// SPDX-License-Identifier: (GPL-2.0 OR MIT)
/*
 * Copyright (C) 2023 Atmark Techno, Inc. All Rights Reserved.
 */
 
/dts-v1/;
/plugin/;
 
#include <dt-bindings/clock/imx6ul-clock.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
 
#include "imx6ul-pinfunc.h"
#include "imx6ull-pinfunc.h"
#include "imx6ull-pinfunc-snvs.h"
 
&uart1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_uart1>;
        status = "okay";
};
 
&iomuxc {
        pinctrl_uart1: uart1grp {
                // MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX は gpio1_io17 (TX gpio1_io16)
                // CON8のGPIO1_IO02,GPIO1_IO03をUART1_TX/RXとして使用したい場合は以下のとおり
                fsl,pins = <
                        MX6UL_PAD_GPIO1_IO02__UART1_DCE_TX 0x00008
                        MX6UL_PAD_GPIO1_IO03__UART1_DCE_RX 0x1b0b1
                >;
        };
};

$ make armadillo-600-customize.dtbo
  DTC     arch/arm/boot/dts/armadillo-600-customize.dtbo

armadillo:~# cat /boot/overlays.txt 
fdt_overlays=armadillo-iotg-a6e-ems31.dtbo armadillo-600-customize.dtbo

console=ttymxc0,115200

# /etc/inittab
 
::sysinit:/sbin/openrc sysinit
::sysinit:/sbin/openrc boot
::wait:/sbin/openrc default
 
# Set up a couple of getty's
tty1::respawn:/sbin/getty 38400 tty1
tty2::respawn:/sbin/getty 38400 tty2
tty3::respawn:/sbin/getty 38400 tty3
tty4::respawn:/sbin/getty 38400 tty4
tty5::respawn:/sbin/getty 38400 tty5
tty6::respawn:/sbin/getty 38400 tty6
 
# Put a getty on the serial port
::respawn:/sbin/getty -L 115200 ttymxc0 vt102
 
# Stuff to do for the 3-finger salute
::ctrlaltdel:/sbin/reboot
 
# Stuff to do before rebooting
::shutdown:/sbin/openrc shutdown

$ mkdir mkswu/a6e_uart
$ cd mkswu/a6e_uart
$ cp ~/linux../arch/arm/boot/dts/armadillo-600-customize.dtbo armadillo-600-customize-uart.dtbo
$ echo 'console=ttymxc0,115200' > 20_console
$ vi inittab
$ cat update_uart.desc
swdesc_option component=extra_os.uart
swdesc_option version=1
 
swdesc_files --dest /boot armadillo-600-customize-uart.dtbo
swdesc_files --dest /boot/uboot_env.d 20_console
swdesc_files --dest /etc inittab
swdesc_script "$SCRIPT_DIR/examples/update_overlays.sh" -- "armadillo-600-customize-uart.dtbo"
swdesc_script "$SCRIPT_DIR/examples/update_preserve_files.sh" -- "/boot/armadillo-600-customize-uart.dtbo"
$ mkswu update_uart.desc
update_uart.swu を作成しました。