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| /Documentation/media/uapi/mediactl/ |
| D | media-func-open.rst | 10 .. _media-func-open:
13 media open()
19 media-open - Open a media device
30 .. c:function:: int open( const char *device_name, int flags )
31 :name: mc-open
40 Open flags. Access mode must be either ``O_RDONLY`` or ``O_RDWR``.
47 To open a media device applications call :ref:`open() <media-func-open>` with the
59 :ref:`open() <func-open>` returns the new file descriptor on success. On error,
67 The process already has the maximum number of files open.
70 The system limit on the total number of open files has been reached.
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| D | media-func-close.rst | 37 File descriptor returned by :c:func:`open() <mc-open>`.
54 ``fd`` is not a valid open file descriptor.
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| /Documentation/media/uapi/v4l/ |
| D | func-open.rst | 10 .. _func-open:
13 V4L2 open()
19 v4l2-open - Open a V4L2 device
30 .. c:function:: int open( const char *device_name, int flags )
31 :name: v4l2-open
40 Open flags. Access mode must be ``O_RDWR``. This is just a
57 To open a V4L2 device applications call :ref:`open() <func-open>` with the
60 remain unchanged. At the first :ref:`open() <func-open>` call after loading the
68 On success :ref:`open() <func-open>` returns the new file descriptor. On error
86 The process already has the maximum number of files open.
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| D | func-close.rst | 37 File descriptor returned by :ref:`open() <func-open>`.
56 ``fd`` is not a valid open file descriptor.
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| D | func-write.rst | 37 File descriptor returned by :ref:`open() <func-open>`.
70 :ref:`O_NONBLOCK <func-open>` flag and no buffer space was
74 ``fd`` is not a valid file descriptor or is not open for writing.
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| /Documentation/media/uapi/cec/ |
| D | cec-func-open.rst | 10 .. _cec-func-open:
13 cec open()
19 cec-open - Open a cec device
29 .. c:function:: int open( const char *device_name, int flags )
30 :name: cec-open
40 Open flags. Access mode must be ``O_RDWR``.
56 To open a cec device applications call :c:func:`open() <cec-open>` with the
68 :c:func:`open() <cec-open>` returns the new file descriptor on success. On error,
76 The process already has the maximum number of files open.
79 The system limit on the total number of open files has been reached.
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| D | cec-func-close.rst | 37 File descriptor returned by :c:func:`open() <cec-open>`.
54 ``fd`` is not a valid open file descriptor.
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| /Documentation/media/uapi/dvb/ |
| D | frontend_f_open.rst | 13 Digital TV frontend open()
19 fe-open - Open a frontend device
30 .. c:function:: int open( const char *device_name, int flags )
31 :name: dvb-fe-open
40 Open flags. Access can either be ``O_RDWR`` or ``O_RDONLY``.
45 Only one open is allowed in ``O_RDWR``. In this mode, all ioctls are
60 thing to do after a successful open is to find out the frontend type
68 multiple devices cannot be open in read/write mode simultaneously. As
69 long as a front-end device is opened in read/write mode, other open()
75 When an open() call has succeeded, the device will be ready for use in
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| D | ca-fopen.rst | 13 Digital TV CA open()
19 Digital TV CA open()
25 .. c:function:: int open(const char *name, int flags)
26 :name: dvb-ca-open
52 - open in non-blocking mode
62 When an ``open()`` call has succeeded, the device will be ready for use. The
65 affect the semantics of the ``open()`` call itself. A device opened in
69 Only one user can open the CA Device in ``O_RDWR`` mode. All other
70 attempts to open the device in this mode will fail, and an error code
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| D | audio-fopen.rst | 13 Digital TV audio open()
19 Digital TV audio open()
26 .. c:function:: int open(const char *deviceName, int flags)
27 :name: dvb-audio-open
63 - O_NONBLOCK open in non-blocking mode
75 /dev/dvb/adapter0/audio0) for subsequent use. When an open() call has
79 of the open() call itself. A device opened in blocking mode can later be
82 the Linux manual page for fcntl. Only one user can open the Audio Device
83 in O_RDWR mode. All other attempts to open the device in this mode will
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| D | video-fopen.rst | 13 dvb video open()
19 dvb video open()
26 .. c:function:: int open(const char *deviceName, int flags)
62 - O_NONBLOCK open in non-blocking mode
76 When an open() call has succeeded, the device will be ready for use. The
79 affect the semantics of the open() call itself. A device opened in
83 user can open the Video Device in O_RDWR mode. All other attempts to
84 open the device in this mode will fail, and an error-code will be
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| D | dmx-fopen.rst | 13 Digital TV demux open()
19 Digital TV demux open()
25 .. c:function:: int open(const char *deviceName, int flags)
26 :name: dvb-dmx-open
54 - open in non-blocking mode
74 affect the semantics of the ``open()`` call itself. A device opened
95 - “Too many open files”, i.e. no more filters available.
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| D | dmx-fclose.rst | 34 :c:func:`open() <dvb-dmx-open>`.
40 previously allocated via the :c:func:`open() <dvb-dmx-open>` call.
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| /Documentation/devicetree/bindings/interrupt-controller/ |
| D | open-pic.txt | 1 * Open PIC Binding
4 representation of an Open PIC compliant interrupt controller. This binding is
5 based on the binding defined for Open PIC in [1] and is a superset of that
14 shall be <string> and the value shall include "open-pic".
20 as an Open PIC. No property value shall be defined.
55 * An Open PIC interrupt controller
62 // this Open PIC node do not need a parent address specifier.
71 // Compatible with Open PIC.
72 compatible = "open-pic";
81 * An interrupt generating device that is wired to an Open PIC.
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| /Documentation/devicetree/bindings/i2c/ |
| D | i2c-gpio.yaml | 23 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
25 open drain.
31 active high using open drain with (GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN)
33 open drain.
54 i2c-gpio,sda-open-drain:
58 the GPIO line used for SDA into open drain mode, and that something is
61 i2c-gpio,scl-open-drain:
65 GPIO line used for SCL into open drain mode, and that something is not
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| /Documentation/driver-api/gpio/ |
| D | intro.rst | 51 other value (notably, "open drain" signaling).
92 Open Drain and Open Source
94 Sometimes shared signals need to use "open drain" (where only the low signal
95 level is actually driven), or "open source" (where only the high signal level is
96 driven) signaling. That term applies to CMOS transistors; "open collector" is
101 One common example of an open drain signal is a shared active-low IRQ line.
102 Also, bidirectional data bus signals sometimes use open drain signals.
104 Some GPIO controllers directly support open drain and open source outputs; many
105 don't. When you need open drain signaling but your hardware doesn't directly
115 The same logic can be applied to emulate open source signaling, by driving the
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| D | driver.rst | 98 - Single-ended modes (open drain/open source)
133 GPIO lines with open drain/source support
136 Open drain (CMOS) or open collector (TTL) means the line is not actively driven
138 is not open, it will present a high-impedance (tristate) to the external rail::
191 either transistor will go totally numb if this switch is open. The totem-pole
193 high or low respectively. That is usually how software-controlled open
196 Some GPIO hardware come in open drain / open source configuration. Some are
197 hard-wired lines that will only support open drain or open source no matter
199 by flipping a bit in a register the output can be configured as open drain
200 or open source, in practice by flicking open the switches labeled "OD" and "OS"
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| /Documentation/ABI/testing/ |
| D | sysfs-bus-iio-adc-hi8435 | 7 Could be either "GND-Open" or "Supply-Open" mode. Y is a
19 is separately set for "GND-Open" and "Supply-Open" modes.
36 is separately set for "GND-Open" and "Supply-Open" modes.
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| D | sysfs-bus-iio-temperature-max31856 | 5 Open-circuit fault. The detection of open-circuit faults,
8 '1' = An open circuit such as broken thermocouple wires
10 '0' = No open circuit or broken thermocouple wires are detected
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| /Documentation/filesystems/ |
| D | dlmfs.txt | 78 and write(2) against the fd obtained via your open(2) call. The
89 domain directory. Locking against them is done via the open(2) system
92 The open(2) call will not return until your lock has been granted or
96 open(2) with O_CREAT to ensure the resource inode is created - dlmfs does
99 Open Flag Lock Request Type
104 Open Flag Resulting Locking Behavior
111 could not lock the resource then open(2) will return ETXTBUSY.
115 Modes passed to mkdir(2) or open(2) are adhered to locally. Chown is
121 write(2) only when open in Exclusive mode.
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| D | inotify.txt | 12 Q: What is the design decision behind not tying the watch to the open fd of
15 A: Watches are associated with an open inotify device, not an open file.
16 This solves the primary problem with dnotify: keeping the file open pins
19 unmounted. Watching a file should not require that it be open.
28 A watch consumes less memory than an open file, separating the number
77 interfaces. The only real difference was whether we wanted to use open(2)
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| /Documentation/filesystems/ext4/ |
| D | mmp.rst | 11 open continues. If the sequence number is EXT4\_MMP\_SEQ\_FSCK, then
12 fsck is (hopefully) running, and open fails immediately. Otherwise, the
13 open code will wait for twice the specified MMP check interval and check
15 filesystem is active on another machine and the open fails. If the MMP
28 an open operation succeeds. The MMP code does not use these values; they
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| /Documentation/devicetree/bindings/pwm/ |
| D | nxp,pca9685-pwm.txt | 13 - open-drain (bool): boolean to configure outputs with open-drain structure;
26 open-drain;
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| /Documentation/media/kapi/ |
| D | v4l2-fh.rst | 20 structure and ``file->private_data`` is set to it in the driver's ``open()``
26 #) :c:func:`v4l2_fh_init` and :c:func:`v4l2_fh_add` in ``open()``
83 :c:type:`v4l2_file_operations`->open() handler.
119 These two functions can be plugged into the v4l2_file_operation's ``open()``
124 whether the :c:type:`v4l2_fh` struct is the only open filehandle of the
130 - Returns 1 if the file handle is the only open file handle, else 0.
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| /Documentation/devicetree/bindings/w1/ |
| D | w1-gpio.txt | 13 - linux,open-drain: if specified, the data pin is considered in
14 open-drain mode.
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