Add test script to validate USB LS

Runner/suites/Kernel/Baseport/usb_ls/README.md

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+```
+Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+SPDX-License-Identifier: BSD-3-Clause-Clear
+```
+
+# USB Low Speed Validation
+
+## Overview
+
+This shell script executes on the DUT (Device-Under-Test) and verifies successful enumeration of connected USB Devices in Low Speed (LS - 1.5 Mb/s) .
+
+---
+
+## Setup
+
+- Connect LS USB peripheral(s) to USB port(s) on DUT.
+- Only applicable for USB ports that support Host Mode functionality. 
+- USB peripherals examples: Mass Storage devices (pendrives, SSD, hard drives, etc.), HID devices (Mouse, Keyboard, USB headset, USB camera, etc.)
+
+---
+
+## Usage
+### Instructions:
+1. **Copy the test suite to the target device** using `scp` or any preferred method.
+2. **Navigate to the test directory** on the target device.
+3. **Run the test script** using the test runner or directly.
+
+---
+
+### Quick Example
+```bash
+git clone <this-repo>
+cd <this-repo>
+scp -r common Runner user@target_device_ip:<path-on-device>
+ssh user@target_device_ip
+cd <path-on-device>/Runner && ./run-test.sh usb_ls
+```

Runner/suites/Kernel/Baseport/usb_ls/run.sh

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+#!/bin/sh
+
+# Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+
+# Validate that at least one non-hub USB peripheral is enumerated at LowSpeed (<= 1.5 Mb/s).
+# This test ignores hubs and only considers actual USB devices.
+
+# Robustly find and source init_env
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+INIT_ENV=""
+SEARCH="$SCRIPT_DIR"
+while [ "$SEARCH" != "/" ]; do
+    if [ -f "$SEARCH/init_env" ]; then
+        INIT_ENV="$SEARCH/init_env"
+        break
+    fi
+    SEARCH=$(dirname "$SEARCH")
+done
+
+if [ -z "$INIT_ENV" ]; then
+    echo "[ERROR] Could not find init_env (starting at $SCRIPT_DIR)" >&2
+    exit 1
+fi
+
+# Only source if not already loaded (idempotent)
+if [ -z "$__INIT_ENV_LOADED" ]; then
+    # shellcheck disable=SC1090
+    . "$INIT_ENV"
+    __INIT_ENV_LOADED=1
+fi
+# Always source functestlib.sh, using $TOOLS exported by init_env
+# shellcheck disable=SC1090,SC1091
+. "$TOOLS/functestlib.sh"
+
+TESTNAME="usb_ls"
+test_path=$(find_test_case_by_name "$TESTNAME")
+cd "$test_path" || exit 1
+# shellcheck disable=SC2034
+res_file="./$TESTNAME.res"
+
+log_info "-----------------------------------------------------------------------------------------"
+log_info "-------------------Starting $TESTNAME Testcase----------------------------"
+log_info "=== Test Initialization ==="
+
+log_info "=== Detecting non-hub LowSpeed USB devices (<= 1.5 Mb/s) ==="
+
+# We rely on sysfs entries under /sys/bus/usb/devices for authoritative device speed.
+# Criteria:
+#  - Only consider entries with bDeviceClass (device-level), skip interface-only entries.
+#  - Ignore hubs: device class 0x09 (9).
+#  - Consider a device LowSpeed if the integer part of speed is 1 (covers 1.0 and 1.5 Mb/s).
+#    Note: sysfs 'speed' commonly reports "1.5" for LowSpeed devices; integer extraction yields 1.
+
+non_hub_count=0
+ls_count=0
+
+for d in /sys/bus/usb/devices/*; do
+    [ -d "$d" ] || continue
+
+    # Must be a device (has bDeviceClass); skip interface/function entries like 1-1:1.0
+    if [ ! -f "$d/bDeviceClass" ]; then
+        continue
+    fi
+
+    class="$(tr -d '[:space:]' 2>/dev/null < "$d/bDeviceClass")"
+    case "$class" in
+        09|9|0x09|0X09) # Hub device; ignore
+            continue
+            ;;
+    esac
+
+    raw_speed="$(cat "$d/speed" 2>/dev/null || echo 0)"
+    speed_int="${raw_speed%%.*}"
+    case "$speed_int" in
+        ''|*[!0-9]*)
+            speed_int=0
+            ;;
+    esac
+
+    busnum="$(cat "$d/busnum" 2>/dev/null || echo "?")"
+    devnum="$(cat "$d/devnum" 2>/dev/null || echo "?")"
+    idVendor="$(cat "$d/idVendor" 2>/dev/null || echo "0000")"
+    idProduct="$(cat "$d/idProduct" 2>/dev/null || echo "0000")"
+    product="$(cat "$d/product" 2>/dev/null || true)"
+    [ -n "$product" ] || product="(unknown)"
+
+    echo "Device: $busnum $devnum ${idVendor}:${idProduct} \"$product\" ${raw_speed}"
+
+    non_hub_count=$((non_hub_count + 1))
+    # LowSpeed if integer part equals 1 (covers 1.5 and 1.0 Mb/s)
+    if [ "$speed_int" -eq 1 ]; then
+        ls_count=$((ls_count + 1))
+    fi
+done
+
+echo "LowSpeed (<=1.5 Mb/s) device count: $ls_count"
+
+if [ "$non_hub_count" -eq 0 ]; then
+    log_fail "$TESTNAME : Test Failed - No non-hub USB peripherals detected. Only hubs or no devices present."
+    echo "$TESTNAME FAIL" > "$res_file"
+    exit 1
+fi
+
+if [ "$ls_count" -gt 0 ]; then
+    log_pass "$TESTNAME : Test Passed - $ls_count LowSpeed device(s) found among $non_hub_count non-hub device(s)."
+    echo "$TESTNAME PASS" > "$res_file"
+    exit 0
+else
+    log_fail "$TESTNAME : Test Failed - No non-hub USB device enumerated at LowSpeed (<= 1.5 Mb/s)."
+    echo "$TESTNAME FAIL" > "$res_file"
+    exit 1
+fi
+
+log_info "-------------------Completed $TESTNAME Testcase----------------------------"

Runner/suites/Kernel/Baseport/usb_ls/usb_ls.yaml

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+metadata:
+  name: usb-ls
+  format: "Lava-Test Test Definition 1.0"
+  description: "This shell script executes on the DUT (Device-Under-Test) and verifies successful enumeration of connected USB Devices in Low Speed (LS)."
+  os:
+    - linux
+  scope:
+    - functional
+
+run:
+  steps:
+    - REPO_PATH=$PWD
+    - cd Runner/suites/Kernel/Baseport/usb_ls
+    - ./run.sh || true
+    - $REPO_PATH/Runner/utils/send-to-lava.sh usb_ls.res || true
+