OpenVoiceOS/buildroot-external/board/raspberrypi/rootfs-overlay/etc/udev/rules.d/99-com.rules

SUBSYSTEM=="input", GROUP="input", MODE="0660"
SUBSYSTEM=="i2c-dev", GROUP="i2c", MODE="0660"
SUBSYSTEM=="spidev", GROUP="spi", MODE="0660"
SUBSYSTEM=="bcm2835-gpiomem", GROUP="gpio", MODE="0660"
SUBSYSTEM=="bcm2835-gpiomem", GROUP="gpio", MODE="0660"
SUBSYSTEM=="rpivid-*", GROUP="video", MODE="0660"

KERNEL=="vcsm-cma", GROUP="video", MODE="0660"
SUBSYSTEM=="dma_heap", GROUP="video", MODE="0660"
SUBSYSTEM=="vchiq", GROUP="video", MODE="0660"

SUBSYSTEM=="gpio", GROUP="gpio", MODE="0660"
SUBSYSTEM=="gpio", KERNEL=="gpiochip*", ACTION=="add", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys/class/gpio && chmod -R g=u /sys/class/gpio'"
SUBSYSTEM=="gpio", ACTION=="add", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys%p && chmod -R g=u /sys%p'"

# PWM export results in a "change" action on the pwmchip device (not "add" of a new device), so match actions other than "remove".
SUBSYSTEM=="pwm", ACTION!="remove", PROGRAM="/bin/sh -c 'chgrp -R gpio /sys%p && chmod -R g=u /sys%p'"

KERNEL=="ttyAMA0", PROGRAM="/bin/sh -c '\
        ALIASES=/proc/device-tree/aliases; \
        if cmp -s $$ALIASES/uart0 $$ALIASES/serial0; then \
                echo 0;\
        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial1; then \
                echo 1; \
        else \
                exit 1; \
        fi\
'", SYMLINK+="serial%c"

KERNEL=="ttyAMA1", PROGRAM="/bin/sh -c '\
        ALIASES=/proc/device-tree/aliases; \
        if [ -e /dev/ttyAMA0 ]; then \
                exit 1; \
        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial0; then \
                echo 0;\
        elif cmp -s $$ALIASES/uart0 $$ALIASES/serial1; then \
                echo 1; \
        else \
                exit 1; \
        fi\
'", SYMLINK+="serial%c"

KERNEL=="ttyS0", PROGRAM="/bin/sh -c '\
        ALIASES=/proc/device-tree/aliases; \
        if cmp -s $$ALIASES/uart1 $$ALIASES/serial0; then \
                echo 0; \
        elif cmp -s $$ALIASES/uart1 $$ALIASES/serial1; then \
                echo 1; \
        else \
                exit 1; \
        fi \
'", SYMLINK+="serial%c"

ACTION=="add", SUBSYSTEM=="vtconsole", KERNEL=="vtcon1", RUN+="/bin/sh -c '\
        if echo RPi-Sense FB | cmp -s /sys/class/graphics/fb0/name; then \
                echo 0 > /sys$devpath/bind; \
        fi; \
'"