meta-facebook: ventura: Use fb-common-functions for GPIO reads

The debugfs fallback used by smc-event-logger now lives in
fb-common-functions as get_gpio_val_by_name(), so the ventura copy in
plat-svc is redundant. Source the common helper instead and drop
gpio_util along with its recipe entries.

Change-Id: I3d5c9910ec32e96d772fd3bc39cb7bcf0a014bac
Signed-off-by: Kyle Hsieh <Kyle.Hsieh@quantatw.com>
diff --git a/meta-facebook/meta-ventura/recipes-phosphor/gpio/phosphor-gpio-monitor/smc-event-logger b/meta-facebook/meta-ventura/recipes-phosphor/gpio/phosphor-gpio-monitor/smc-event-logger
index 7c33612..2e42792 100644
--- a/meta-facebook/meta-ventura/recipes-phosphor/gpio/phosphor-gpio-monitor/smc-event-logger
+++ b/meta-facebook/meta-ventura/recipes-phosphor/gpio/phosphor-gpio-monitor/smc-event-logger
@@ -12,8 +12,8 @@
 gpio_name="$2"
 stash_file="/var/lib/phosphor-gpio-monitor/${gpio_name}.log_entry"
 
-# shellcheck source=meta-facebook/meta-ventura/recipes-ventura/plat-svc/files/gpio_util
-source "/usr/libexec/ventura/gpio_util"
+# shellcheck source=meta-facebook/recipes-fb/obmc_functions/files/fb-common-functions
+source /usr/libexec/fb-common-functions
 
 # For VT cooling systems, AALC-related signals should be ignored.
 if [[ "$gpio_name" == *RPU* || "$gpio_name" == *PUMP* ]] &&
diff --git a/meta-facebook/meta-ventura/recipes-ventura/plat-svc/files/gpio_util b/meta-facebook/meta-ventura/recipes-ventura/plat-svc/files/gpio_util
deleted file mode 100644
index 13e1496..0000000
--- a/meta-facebook/meta-ventura/recipes-ventura/plat-svc/files/gpio_util
+++ /dev/null
@@ -1,73 +0,0 @@
-#!/bin/bash
-
-# Get GPIO chip and line number by GPIO name
-# Args: $1 = GPIO name
-# Echo: "<chip> <line>"
-get_gpio_by_name() {
-  local name="${1:0:31}"  # match kernel's 31-char limit
-  gpioinfo 2>/dev/null | awk -v name="$name" '
-    /^gpiochip/ {chip=$1}
-    /^[ \t]*line/ && $0 ~ name {
-      sub(/:$/, "", $2)
-      print chip, $2
-      exit
-    }
-  '
-}
-
-# Get GPIO logic level (0/1) by GPIO name (first 31 chars match kernel limit)
-# Args: $1 = GPIO name
-get_gpio_val_by_name(){
-  local name="${1:0:31}"
-  local chip line gpio_val
-  read -r chip line < <(get_gpio_by_name "$name")
-
-  # primary: gpioget
-  if ! gpio_val="$(gpioget "$chip" "$line" 2>/dev/null)"; then
-    : # nop
-    # fallback: debugfs
-    if ! gpio_val=$(get_gpio_val_from_debugfs "$chip" "$line"); then
-      : # nop
-    fi
-  fi
-  [ -z "$gpio_val" ] && return 1
-  printf '%s\n' "$gpio_val"
-}
-
-# Get GPIO logic level (0/1) from /sys/kernel/debug/gpio by chip and line offset
-# Args: $1 = chip number/name, $2 = line offset
-get_gpio_val_from_debugfs() {
-  if [[ $chip =~ ^[0-9]+$ ]]; then
-    local chip="gpiochip$1"
-  else
-    local chip=$1
-  fi
-
-  local line=$2
-  local gpio_base gpio_id gpio_val
-
-  local want_name="$1"
-  [ -n "$want_name" ] || return 1
-  [ -r /sys/kernel/debug/gpio ] || return 1
-
-  gpio_base=$(grep -w "$chip" /sys/kernel/debug/gpio | sed -n 's/.*GPIOs \([0-9]\+\)-.*/\1/p')
-  gpio_id=$(("$gpio_base" + "$line"))
-  gpio_val=$(awk -v gpio_id="$gpio_id" '
-    $1 == "gpio-"gpio_id {
-      for (i = 1; i <= NF; i++) {
-        if ($i == "hi") {
-          print "1"
-          exit
-        }
-        else if ($i == "lo") {
-          print "0"
-          exit
-        }
-      }
-      print "unknown"
-    }
-  ' /sys/kernel/debug/gpio)
-
-  [[ $gpio_val =~ ^[0-9]+$ ]] || return 1
-  printf '%s\n' "$gpio_val"
-}
diff --git a/meta-facebook/meta-ventura/recipes-ventura/plat-svc/plat-svc_0.1.bb b/meta-facebook/meta-ventura/recipes-ventura/plat-svc/plat-svc_0.1.bb
index b4e43df..5cd5a24 100644
--- a/meta-facebook/meta-ventura/recipes-ventura/plat-svc/plat-svc_0.1.bb
+++ b/meta-facebook/meta-ventura/recipes-ventura/plat-svc/plat-svc_0.1.bb
@@ -11,7 +11,6 @@
 RDEPENDS:${PN} += "fb-common-functions"
 
 SRC_URI += " \
-    file://gpio_util \
     file://ventura-sys-init.service \
     file://ventura-early-sys-init \
     file://ventura-schematic-init \
@@ -32,7 +31,6 @@
 do_install() {
     VENTURA_LIBEXECDIR="${D}${libexecdir}/ventura"
     install -d ${VENTURA_LIBEXECDIR}
-    install -m 0755 ${UNPACKDIR}/gpio_util ${VENTURA_LIBEXECDIR}
     install -m 0755 ${UNPACKDIR}/ventura-early-sys-init ${VENTURA_LIBEXECDIR}
     install -m 0755 ${UNPACKDIR}/ventura-schematic-init ${VENTURA_LIBEXECDIR}
     install -m 0755 ${UNPACKDIR}/ventura-fan-status-monitor ${D}${libexecdir}