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libdigiapix: add rule for PWM channels to be owned by digiapix group 

The exported PWM channels now report the channel name under udev
EXPORT parameter.
Add the 'change' udev action type to the udev rules and use that
parameter to change the group ownership of the PWM channels to
digiapix group, so they can be used by non-root user.

Signed-off-by: Hector Palacios <hector.palacios@digi.com>
This commit is contained in:
Hector Palacios 2019-04-15 10:59:35 +02:00
parent 6c38b38f95
commit 8fc279fe65
2 changed files with 7 additions and 3 deletions
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2
meta-digi-dey/recipes-digi/libdigiapix/libdigiapix-git/99-digiapix.rules
View File

@ -19,4 +19,4 @@ SUBSYSTEM=="spidev", GROUP="digiapix", MODE="0660"
SUBSYSTEM=="gpio", KERNEL=="gpiochip0", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"
SUBSYSTEM=="gpio", KERNEL!="gpiochip*", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"
SUBSYSTEM=="pwm", ACTION=="add", RUN="/etc/udev/scripts/digiapix.sh"
SUBSYSTEM=="pwm", ACTION=="add|change", RUN="/etc/udev/scripts/digiapix.sh"

8
meta-digi-dey/recipes-digi/libdigiapix/libdigiapix-git/digiapix.sh
View File

@ -19,13 +19,17 @@ if basename "${DEVPATH}" | grep -qs "gpiochip0$"; then
# Use 'gpiochip0' event to set group and mode for 'export/unexport' files
chown root:digiapix /sys/class/gpio/export /sys/class/gpio/unexport
chmod g+w /sys/class/gpio/export /sys/class/gpio/unexport
elif basename "${DEVPATH}" | grep -qs "pwmchip[0-9]\+$"; then
elif basename "${DEVPATH}" | grep -qs "pwmchip[0-9]\+$" && [ "${ACTION}" = "add" ] ; then
# Set group and mode for pwmchip's 'export/unexport' files
chown root:digiapix /sys${DEVPATH}/export /sys${DEVPATH}/unexport
chmod g+w /sys${DEVPATH}/export /sys${DEVPATH}/unexport
elif basename "${DEVPATH}" | grep -qs "pwmchip[0-9]\+$" && [ "${ACTION}" = "change" ] ; then
# Set group and mode for 'pwmX' channel and all files inside it...
chown root:digiapix /sys${DEVPATH}/${EXPORT} /sys${DEVPATH}/${EXPORT}/*
chmod g+w /sys${DEVPATH}/${EXPORT}/*
else
# Change group and mode of the sysfs files created whenever a 'gpioX'
# or 'pwmX' is exported
# is exported
chown -h root:digiapix /sys${DEVPATH}/*
chmod g+w /sys${DEVPATH}/*
fi