xref: /openbmc/openbmc-tools/i2c/tree.py (revision 2302fa41) 
1#!/bin/python
2
3import re
4import sys
5
6from anytree import Node, RenderTree
7
8usage = """
9Usage: using local file or stdin to parse i2c bus info to tree
10    1. ssh user@<ip> "i2cdetect -l" > i2c_bus_info.txt
11    2. python tree.py i2c_bus_info.txt
12
13    or
14
15    ssh user@<ip> "i2cdetect -l" | python tree.py
16"""
17
18node_dict = {}
19root = Node("root")
20
21
22def parse_line(line):
23    line = line.strip()
24    regex = re.compile(r"(i2c-\d+)\s+i2c\s+(.*)\s+I2C adapter")
25    m = regex.match(line)
26    if m:
27        bus = m.group(1)
28        name = m.group(2).strip()
29        return (bus, name)
30    else:
31        return None
32
33
34def draw(line):
35    i2c = parse_line(line)
36    if not i2c:
37        return
38
39    bus, name = i2c
40
41    if "mux" not in name:
42        node_dict[bus] = Node(bus, parent=root)
43    else:
44        mux_regex = re.compile(r"i2c-(\d+)-mux \(chan_id (\d+)\)")
45        m = mux_regex.match(name)
46        if m:
47            i2c = m.group(1)
48            if "i2c-" + i2c in node_dict:
49                node_dict[bus] = Node(bus, parent=node_dict["i2c-" + i2c])
50
51
52def parse_from_file(file):
53    with open(file, "r") as f:
54        lines = f.readlines()
55        for line in lines:
56            draw(line)
57
58
59def parse_from_stdin():
60    lines = sys.stdin.readlines()
61    for line in lines:
62        draw(line)
63
64
65def print_tree():
66    for pre, fill, node in RenderTree(root):
67        print("%s%s" % (pre, node.name))
68
69
70if __name__ == "__main__":
71    if len(sys.argv) == 2:
72        if (
73            sys.argv[1] == "-h"
74            or sys.argv[1] == "--help"
75            or sys.argv[1] == "help"
76            or sys.argv[1] == "?"
77        ):
78            print(usage)
79            sys.exit(0)
80
81    try:
82        if len(sys.argv) == 2:
83            file = sys.argv[1]
84            parse_from_file(file)
85        else:
86            parse_from_stdin()
87    except Exception as e:
88        print(e)
89        print(usage)
90        sys.exit(1)
91
92    print_tree()
93