VisionFive2 Linux kernel

51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   1) #! /bin/sh
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   2) # SPDX-License-Identifier: GPL-2.0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   3) # Copyright (c) 2020, Google LLC. All rights reserved.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   4) # Author: Saravana Kannan <saravanak@google.com>
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   5) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   6) function help() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   7) 	cat << EOF
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   8) Usage: $(basename $0) [-c|-d|-m|-f] [filter options] <list of devices>
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700   9) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  10) This script needs to be run on the target device once it has booted to a
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  11) shell.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  12) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  13) The script takes as input a list of one or more device directories under
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  14) /sys/devices and then lists the probe dependency chain (suppliers and
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  15) parents) of these devices. It does a breadth first search of the dependency
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  16) chain, so the last entry in the output is close to the root of the
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  17) dependency chain.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  18) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  19) By default it lists the full path to the devices under /sys/devices.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  20) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  21) It also takes an optional modifier flag as the first parameter to change
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  22) what information is listed in the output. If the requested information is
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  23) not available, the device name is printed.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  24) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  25)   -c	lists the compatible string of the dependencies
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  26)   -d	lists the driver name of the dependencies that have probed
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  27)   -m	lists the module name of the dependencies that have a module
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  28)   -f	list the firmware node path of the dependencies
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  29)   -g	list the dependencies as edges and nodes for graphviz
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  30)   -t	list the dependencies as edges for tsort
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  31) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  32) The filter options provide a way to filter out some dependencies:
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  33)   --allow-no-driver	By default dependencies that don't have a driver
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  34) 			attached are ignored. This is to avoid following
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  35) 			device links to "class" devices that are created
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  36) 			when the consumer probes (as in, not a probe
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  37) 			dependency). If you want to follow these links
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  38) 			anyway, use this flag.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  39) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  40)   --exclude-devlinks	Don't follow device links when tracking probe
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  41) 			dependencies.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  42) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  43)   --exclude-parents	Don't follow parent devices when tracking probe
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  44) 			dependencies.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  45) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  46) EOF
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  47) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  48) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  49) function dev_to_detail() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  50) 	local i=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  51) 	while [ $i -lt ${#OUT_LIST[@]} ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  52) 	do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  53) 		local C=${OUT_LIST[i]}
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  54) 		local S=${OUT_LIST[i+1]}
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  55) 		local D="'$(detail_chosen $C $S)'"
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  56) 		if [ ! -z "$D" ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  57) 		then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  58) 			# This weirdness is needed to work with toybox when
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  59) 			# using the -t option.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  60) 			printf '%05u\t%s\n' ${i} "$D" | tr -d \'
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  61) 		fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  62) 		i=$((i+2))
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  63) 	done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  64) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  65) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  66) function already_seen() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  67) 	local i=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  68) 	while [ $i -lt ${#OUT_LIST[@]} ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  69) 	do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  70) 		if [ "$1" = "${OUT_LIST[$i]}" ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  71) 		then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  72) 			# if-statement treats 0 (no-error) as true
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  73) 			return 0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  74) 		fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  75) 		i=$(($i+2))
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  76) 	done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  77) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  78) 	# if-statement treats 1 (error) as false
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  79) 	return 1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  80) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  81) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  82) # Return 0 (no-error/true) if parent was added
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  83) function add_parent() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  84) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  85) 	if [ ${ALLOW_PARENTS} -eq 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  86) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  87) 		return 1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  88) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  89) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  90) 	local CON=$1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  91) 	# $CON could be a symlink path. So, we need to find the real path and
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  92) 	# then go up one level to find the real parent.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  93) 	local PARENT=$(realpath $CON/..)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  94) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  95) 	while [ ! -e ${PARENT}/driver ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  96) 	do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  97) 		if [ "$PARENT" = "/sys/devices" ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  98) 		then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700  99) 			return 1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 100) 		fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 101) 		PARENT=$(realpath $PARENT/..)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 102) 	done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 103) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 104) 	CONSUMERS+=($PARENT)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 105) 	OUT_LIST+=(${CON} ${PARENT})
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 106) 	return 0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 107) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 108) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 109) # Return 0 (no-error/true) if one or more suppliers were added
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 110) function add_suppliers() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 111) 	local CON=$1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 112) 	local RET=1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 113) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 114) 	if [ ${ALLOW_DEVLINKS} -eq 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 115) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 116) 		return 1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 117) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 118) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 119) 	SUPPLIER_LINKS=$(ls -1d $CON/supplier:* 2>/dev/null)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 120) 	for SL in $SUPPLIER_LINKS;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 121) 	do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 122) 		SYNC_STATE=$(cat $SL/sync_state_only)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 123) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 124) 		# sync_state_only links are proxy dependencies.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 125) 		# They can also have cycles. So, don't follow them.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 126) 		if [ "$SYNC_STATE" != '0' ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 127) 		then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 128) 			continue
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 129) 		fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 130) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 131) 		SUPPLIER=$(realpath $SL/supplier)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 132) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 133) 		if [ ! -e $SUPPLIER/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 134) 		then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 135) 			continue
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 136) 		fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 137) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 138) 		CONSUMERS+=($SUPPLIER)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 139) 		OUT_LIST+=(${CON} ${SUPPLIER})
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 140) 		RET=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 141) 	done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 142) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 143) 	return $RET
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 144) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 145) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 146) function detail_compat() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 147) 	f=$1/of_node/compatible
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 148) 	if [ -e $f ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 149) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 150) 		echo -n $(cat $f)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 151) 	else
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 152) 		echo -n $1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 153) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 154) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 155) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 156) function detail_module() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 157) 	f=$1/driver/module
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 158) 	if [ -e $f ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 159) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 160) 		echo -n $(basename $(realpath $f))
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 161) 	else
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 162) 		echo -n $1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 163) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 164) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 165) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 166) function detail_driver() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 167) 	f=$1/driver
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 168) 	if [ -e $f ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 169) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 170) 		echo -n $(basename $(realpath $f))
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 171) 	else
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 172) 		echo -n $1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 173) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 174) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 175) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 176) function detail_fwnode() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 177) 	f=$1/firmware_node
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 178) 	if [ ! -e $f ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 179) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 180) 		f=$1/of_node
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 181) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 182) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 183) 	if [ -e $f ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 184) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 185) 		echo -n $(realpath $f)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 186) 	else
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 187) 		echo -n $1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 188) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 189) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 190) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 191) function detail_graphviz() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 192) 	if [ "$2" != "ROOT" ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 193) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 194) 		echo -n "\"$(basename $2)\"->\"$(basename $1)\""
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 195) 	else
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 196) 		echo -n "\"$(basename $1)\""
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 197) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 198) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 199) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 200) function detail_tsort() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 201) 	echo -n "\"$2\" \"$1\""
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 202) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 203) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 204) function detail_device() { echo -n $1; }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 205) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 206) alias detail=detail_device
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 207) ALLOW_NO_DRIVER=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 208) ALLOW_DEVLINKS=1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 209) ALLOW_PARENTS=1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 210) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 211) while [ $# -gt 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 212) do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 213) 	ARG=$1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 214) 	case $ARG in
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 215) 		--help)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 216) 			help
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 217) 			exit 0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 218) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 219) 		-c)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 220) 			alias detail=detail_compat
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 221) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 222) 		-m)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 223) 			alias detail=detail_module
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 224) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 225) 		-d)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 226) 			alias detail=detail_driver
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 227) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 228) 		-f)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 229) 			alias detail=detail_fwnode
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 230) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 231) 		-g)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 232) 			alias detail=detail_graphviz
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 233) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 234) 		-t)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 235) 			alias detail=detail_tsort
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 236) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 237) 		--allow-no-driver)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 238) 			ALLOW_NO_DRIVER=1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 239) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 240) 		--exclude-devlinks)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 241) 			ALLOW_DEVLINKS=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 242) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 243) 		--exclude-parents)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 244) 			ALLOW_PARENTS=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 245) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 246) 		*)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 247) 			# Stop at the first argument that's not an option.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 248) 			break
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 249) 			;;
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 250) 	esac
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 251) 	shift
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 252) done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 253) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 254) function detail_chosen() {
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 255) 	detail $1 $2
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 256) }
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 257) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 258) if [ $# -eq 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 259) then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 260) 	help
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 261) 	exit 1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 262) fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 263) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 264) CONSUMERS=($@)
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 265) OUT_LIST=()
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 266) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 267) # Do a breadth first, non-recursive tracking of suppliers. The parent is also
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 268) # considered a "supplier" as a device can't probe without its parent.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 269) i=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 270) while [ $i -lt ${#CONSUMERS[@]} ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 271) do
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 272) 	CONSUMER=$(realpath ${CONSUMERS[$i]})
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 273) 	i=$(($i+1))
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 274) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 275) 	if already_seen ${CONSUMER}
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 276) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 277) 		continue
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 278) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 279) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 280) 	# If this is not a device with a driver, we don't care about its
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 281) 	# suppliers.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 282) 	if [ ! -e ${CONSUMER}/driver -a ${ALLOW_NO_DRIVER} -eq 0 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 283) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 284) 		continue
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 285) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 286) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 287) 	ROOT=1
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 288) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 289) 	# Add suppliers to CONSUMERS list and output the consumer details.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 290) 	#
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 291) 	# We don't need to worry about a cycle in the dependency chain causing
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 292) 	# infinite loops. That's because the kernel doesn't allow cycles in
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 293) 	# device links unless it's a sync_state_only device link. And we ignore
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 294) 	# sync_state_only device links inside add_suppliers.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 295) 	if add_suppliers ${CONSUMER}
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 296) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 297) 		ROOT=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 298) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 299) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 300) 	if add_parent ${CONSUMER}
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 301) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 302) 		ROOT=0
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 303) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 304) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 305) 	if [ $ROOT -eq 1 ]
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 306) 	then
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 307) 		OUT_LIST+=(${CONSUMER} "ROOT")
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 308) 	fi
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 309) done
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 310) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 311) # Can NOT combine sort and uniq using sort -suk2 because stable sort in toybox
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 312) # isn't really stable.
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 313) dev_to_detail | sort -k2 -k1 | uniq -f 1 | sort | cut -f2-
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 314) 
51fae39bd5018 (Saravana Kannan 2020-09-01 15:48:42 -0700 315) exit 0