update t440p script

coreboot-t440p/steps/attach_ch341a.sh

@@ -0,0 +1,37 @@
+#!/bin/sh
+# Step: Verify CH341A programmer connection
+
+step_attach_ch341a() {
+  section "Verify CH341A Programmer"
+
+  info "Make sure your CH341A programmer is:"
+  echo "  1. Connected to your computer via USB"
+  echo "  2. Set to 3.3V (NOT 5V!)"
+  echo "  3. Ribbon cable seated in the correct orientation"
+  echo ""
+  warn "Using 5V WILL damage your BIOS chip permanently!"
+
+  prompt_continue
+
+  info "Checking if flashrom detects the CH341A programmer..."
+  if run_cmd "flashrom --programmer ch341a_spi"; then
+    success "CH341A programmer detected!"
+    return 0
+  fi
+
+  error "CH341A programmer not detected."
+  echo ""
+  echo "  Troubleshooting:"
+  echo "    - Ensure the programmer is plugged in"
+  echo "    - Try a different USB port"
+  echo "    - Check the driver: lsusb | grep 1a86:5512"
+  echo "    - Make sure you have permissions (try with sudo)"
+  echo ""
+
+  if prompt_yes_no "Retry detection?"; then
+    step_attach_ch341a
+    return $?
+  fi
+
+  return 1
+}