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#
# Copyright 2017 Ettus Research (National Instruments)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import pyudev
import os
from ..mpmlog import get_logger
def get_eeprom_path(address):
"""
Return EEPROM device path for a given I2C address
"""
context = pyudev.Context()
parent = pyudev.Device.from_name(context, "platform", address)
paths = [device.device_node if device.device_node is not None else device.sys_path
for device in context.list_devices(parent=parent, subsystem="nvmem")]
if len(paths) != 1:
raise Exception("{0} paths to EEPROM found!".format(len(paths)))
return paths[0] + "/nvmem"
def get_spidev_nodes(spi_master):
"""
Return found spidev device paths for a given SPI master
"""
context = pyudev.Context()
parent = pyudev.Device.from_name(context, "platform", spi_master)
paths = [device.device_node.encode('ascii')
for device in context.list_devices(parent=parent, subsystem="spidev")]
return paths
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