scripts: runner: Introduce blflash runner

Add Bouffalo Lab ISP console flash runner.  This tool enable bootloader
to flash devices using serial port.

The blflash Rust tool can be found at
  https://github.com/spacemeowx2/blflash

Signed-off-by: Gerson Fernando Budke <[email protected]>

Author: nandojve

boards/common/blflash.board.cmake

@@ -0,0 +1,5 @@
+# Copyright (c) 2021-2025 Gerson Fernando Budke <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+board_set_flasher_ifnset(blflash)
+board_finalize_runner_args(blflash)

scripts/west_commands/runners/__init__.py

@@ -27,6 +27,7 @@ def _import_runner_module(runner_name):
 _names = [
     # zephyr-keep-sorted-start
     'blackmagicprobe',
+    'blflash',
     'bossac',
     'canopen_program',
     'dediprog',

scripts/west_commands/runners/blflash.py

@@ -0,0 +1,58 @@
+# Copyright (c) 2021-2025 Gerson Fernando Budke <[email protected]>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+'''Bouffalo Lab flash tool (blflash) runner for serial boot ROM'''
+
+from runners.core import RunnerCaps, ZephyrBinaryRunner
+
+DEFAULT_BLFLASH_PORT = '/dev/ttyUSB0'
+DEFAULT_BLFLASH_SPEED = '2000000'
+
+
+class BlFlashBinaryRunner(ZephyrBinaryRunner):
+    '''Runner front-end for blflash.'''
+
+    def __init__(
+        self, cfg, blflash='blflash', port=DEFAULT_BLFLASH_PORT, speed=DEFAULT_BLFLASH_SPEED
+    ):
+        super().__init__(cfg)
+        self.blflash = blflash
+        self.port = port
+        self.speed = speed
+
+    @classmethod
+    def name(cls):
+        return 'blflash'
+
+    @classmethod
+    def capabilities(cls):
+        return RunnerCaps(commands={'flash'})
+
+    @classmethod
+    def do_add_parser(cls, parser):
+        parser.add_argument(
+            '--blflash', default='blflash', help='path to blflash, default is blflash'
+        )
+        parser.add_argument(
+            '--port',
+            default=DEFAULT_BLFLASH_PORT,
+            help='serial port to use, default is ' + str(DEFAULT_BLFLASH_PORT),
+        )
+        parser.add_argument(
+            '--speed',
+            default=DEFAULT_BLFLASH_SPEED,
+            help='serial port speed to use, default is ' + DEFAULT_BLFLASH_SPEED,
+        )
+
+    @classmethod
+    def do_create(cls, cfg, args):
+        return BlFlashBinaryRunner(cfg, blflash=args.blflash, port=args.port, speed=args.speed)
+
+    def do_run(self, command, **kwargs):
+        self.require(self.blflash)
+        self.ensure_output('bin')
+
+        cmd_flash = [self.blflash, 'flash', self.cfg.bin_file, '-p', self.port, '-b', self.speed]
+
+        self.check_call(cmd_flash)

scripts/west_commands/tests/test_imports.py

@@ -18,6 +18,7 @@ def test_runner_imports():
         # zephyr-keep-sorted-start
         'arc-nsim',
         'blackmagicprobe',
+        'blflash',
         'bossac',
         'canopen',
         'dediprog',