tools/leds/get_led_device_info.sh

Source file repositories/reference/linux-study-clean/tools/leds/get_led_device_info.sh

File Facts

System
Linux kernel
Corpus path
tools/leds/get_led_device_info.sh
Extension
.sh
Size
5841 bytes
Lines
202
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

while (i <= NF - 2) {   \
                                        printf $i"/";   \
                                        i++;            \
                                };                      \
                        }')
	led_defs_path=$linux_top/$led_common_defs_path
elif [ $num_args -eq 2 ]; then
        led_defs_path=`realpath $2`
else
	echo "Usage: get_led_device_info.sh LED_CDEV_PATH [LED_COMMON_DEFS_PATH]"
	exit 1
fi

if [ ! -f $led_defs_path ]; then
	echo "$led_defs_path doesn't exist"
	exit 1
fi

led_cdev_path=`echo $1 | sed s'/\/$//'`

ls "$led_cdev_path/brightness" > /dev/null 2>&1
if [ $? -ne 0 ]; then
	echo "Device \"$led_cdev_path\" does not exist."
	exit 1
fi

bus=`readlink $led_cdev_path/device/subsystem | sed s'/.*\///'`
usb_subdev=`readlink $led_cdev_path | grep usb | sed s'/\(.*usb[0-9]*\/[0-9]*-[0-9]*\)\/.*/\1/'`
ls "$led_cdev_path/device/of_node/compatible" > /dev/null 2>&1
of_node_missing=$?

if [ "$bus" = "input" ]; then
	input_node=`readlink $led_cdev_path/device | sed s'/.*\///'`
	if [ ! -z "$usb_subdev" ]; then
		bus="usb"
	fi
fi

if [ "$bus" = "usb" ]; then
	usb_interface=`readlink $led_cdev_path | sed s'/.*\(usb[0-9]*\)/\1/' | cut -d\/ -f3`
	cd $led_cdev_path/../$usb_subdev
	driver=`readlink $usb_interface/driver | sed s'/.*\///'`
	if [ -d "$usb_interface/ieee80211" ]; then
		wifi_phy=`ls -l $usb_interface/ieee80211 | grep phy | awk '{print $9}'`
	fi
	idVendor=`cat idVendor`
	idProduct=`cat idProduct`
	manufacturer=`cat manufacturer`
	product=`cat product`
elif [ "$bus" = "input" ]; then
	cd $led_cdev_path
	product=`cat device/name`
	driver=`cat device/device/driver/description`
elif [ $of_node_missing -eq 0 ]; then
	cd $led_cdev_path
	compatible=`cat device/of_node/compatible`
	if [ "$compatible" = "gpio-leds" ]; then
		driver="leds-gpio"
	elif [ "$compatible" = "pwm-leds" ]; then
		driver="leds-pwm"
	else
		manufacturer=`echo $compatible | awk -F, '{print $1}'`
		product=`echo $compatible | awk -F, '{print $2}'`
	fi
else
	echo "Unknown device type."
	exit 1
fi

printf "\n#####################################\n"

Annotation

Implementation Notes