blob: ca036ff93b3b065a7ce78e78619408cf4a273d72 [file] [log] [blame]
# Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
# This is a hardware test for Probing I2C device. The test uses i2cdetect
# utility to check if there's an device on specific bus.
import re
import logging
from autotest_lib.client.bin import test, utils
from autotest_lib.client.common_lib import error
def i2c_detect(bus, addr):
full_cmd = 'i2cdetect -y %d 0x%x 0x%x' % (bus, addr, addr)
result = utils.system_output(full_cmd)
logging.debug('Command: %s', full_cmd)
logging.debug('Result: %s', result)
return result
def i2c_probe(bus, addr):
response = i2c_detect(bus, addr)
return ('^\d\d:\s+(UU|[0-9a-f]{2})', response, re.MULTILINE) is
not None)
class hardware_I2CProbe(test.test):
version = 1
def run_once(self, bus, addr):
if not i2c_probe(bus, addr):
raise error.TestError('No I2C device on bus %d addr 0x%x' %
(bus, addr))