1 What: /sys/class/tty/console/active
2 Date: Nov 2010
3 Contact: Kay Sievers <kay.sievers@vrfy.o
4 Description:
5 Shows the list of currently c
6 console devices, like 'tty1 t
7 The last entry in the file is
8 device connected to /dev/cons
9 The file supports poll() to d
10 console switches.
11
12 What: /sys/class/tty/tty<x>/active
13 Date: Nov 2010
14 Contact: Kay Sievers <kay.sievers@vrfy.o
15 Description:
16 Shows the currently active vi
17 device, like 'tty1'.
18 The file supports poll() to d
19 console switches.
20
21 What: /sys/class/tty/ttyS<x>/uartclk
22 Date: Sep 2012
23 Contact: Tomas Hlavacek <tmshlvck@gmail.
24 Description:
25 Shows the current uartclk val
26 UART port in serial_core, tha
27 uartclk = 16 * baud_base
28
29 These sysfs values expose the
30 sysfs rather than via ioctls.
31
32 What: /sys/class/tty/ttyS<x>/type
33 Date: October 2012
34 Contact: Alan Cox <alan@linux.intel.com>
35 Description:
36 Shows the current tty type fo
37
38 These sysfs values expose the
39 sysfs rather than via ioctls.
40
41 What: /sys/class/tty/ttyS<x>/line
42 Date: October 2012
43 Contact: Alan Cox <alan@linux.intel.com>
44 Description:
45 Shows the current tty line nu
46
47 These sysfs values expose the
48 sysfs rather than via ioctls.
49
50 What: /sys/class/tty/ttyS<x>/port
51 Date: October 2012
52 Contact: Alan Cox <alan@linux.intel.com>
53 Description:
54 Shows the current tty port I/
55
56 These sysfs values expose the
57 sysfs rather than via ioctls.
58
59 What: /sys/class/tty/ttyS<x>/irq
60 Date: October 2012
61 Contact: Alan Cox <alan@linux.intel.com>
62 Description:
63 Shows the current primary int
64
65 These sysfs values expose the
66 sysfs rather than via ioctls.
67
68 What: /sys/class/tty/ttyS<x>/flags
69 Date: October 2012
70 Contact: Alan Cox <alan@linux.intel.com>
71 Description:
72 Show the tty port status flag
73
74 These sysfs values expose the
75 sysfs rather than via ioctls.
76
77 What: /sys/class/tty/ttyS<x>/xmit_fi
78 Date: October 2012
79 Contact: Alan Cox <alan@linux.intel.com>
80 Description:
81 Show the transmit FIFO size f
82
83 These sysfs values expose the
84 sysfs rather than via ioctls.
85
86 What: /sys/class/tty/ttyS<x>/close_d
87 Date: October 2012
88 Contact: Alan Cox <alan@linux.intel.com>
89 Description:
90 Show the closing delay time fo
91
92 These sysfs values expose the
93 sysfs rather than via ioctls.
94
95 What: /sys/class/tty/ttyS<x>/closing
96 Date: October 2012
97 Contact: Alan Cox <alan@linux.intel.com>
98 Description:
99 Show the close wait time for t
100
101 Waiting forever is represented
102 disabled then the value is 655
103
104 These sysfs values expose the
105 sysfs rather than via ioctls.
106
107 What: /sys/class/tty/ttyS<x>/custom_
108 Date: October 2012
109 Contact: Alan Cox <alan@linux.intel.com>
110 Description:
111 Show the custom divisor if an
112
113 These sysfs values expose the
114 sysfs rather than via ioctls.
115
116 What: /sys/class/tty/ttyS<x>/io_type
117 Date: October 2012
118 Contact: Alan Cox <alan@linux.intel.com>
119 Description:
120 Show the I/O type that is to
121 address.
122
123 These sysfs values expose the
124 sysfs rather than via ioctls.
125
126 What: /sys/class/tty/ttyS<x>/iomem_b
127 Date: October 2012
128 Contact: Alan Cox <alan@linux.intel.com>
129 Description:
130 The I/O memory base for this
131
132 These sysfs values expose the
133 sysfs rather than via ioctls.
134
135 What: /sys/class/tty/ttyS<x>/iomem_r
136 Date: October 2012
137 Contact: Alan Cox <alan@linux.intel.com>
138 Description:
139 Show the register shift indic
140 for accesses on this iomem ad
141
142 These sysfs values expose the
143 sysfs rather than via ioctls.
144
145 What: /sys/class/tty/ttyS<x>/rx_trig
146 Date: May 2014
147 Contact: Yoshihiro YUNOMAE <yoshihiro.yu
148 Description:
149 Shows current RX interrupt tr
150 user specified value to chang
151 Users can show or set this va
152 serial device file or not.
153
154 The RX trigger can be set one
155 serials. When users input a m
156 the RX trigger is changed to
157 device specification. For exa
158 16550A, which has 1/4/8/14 by
159 automatically changed to 4 by
160
161 What: /sys/class/tty/ttyS<x>/console
162 Date: February 2020
163 Contact: Andy Shevchenko <andriy.shevche
164 Description:
165 Allows user to detach or atta
166 kernel console. It shows and
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