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/linux/drivers/macintosh/
H A Dwindfarm_pid.h1 /* SPDX-License-Identifier: GPL-2.0-only */
12 * control loops. One is the basic PID implementation, the
13 * other one is more specifically tailored to the loops used
23 /* This parameter array is passed to the PID algorithm. Currently,
24 * we don't support changing parameters on the fly as it's not needed
25 * but could be implemented (with necessary adjustment of the history
38 int first; /* first run of the loop */
57 /* This parameter array is passed to the CPU PID algorithm. Currently,
58 * we don't support changing parameters on the fly as it's not needed
59 * but could be implemented (with necessary adjustment of the history
[all …]
/linux/Documentation/core-api/
H A Dlibrs.rst2 Reed-Solomon Library Programming Interface
10 The generic Reed-Solomon Library provides encoding, decoding and error
13 Reed-Solomon codes are used in communication and storage applications to
16 This documentation is provided for developers who want to utilize the
17 functions provided by the library.
27 This chapter provides examples of how to use the library.
30 ------------
32 The init function init_rs returns a pointer to an rs decoder structure,
33 which holds the necessary information for encoding, decoding and error
34 correction with the given polynomial. It either uses an existing
[all …]
/linux/include/linux/platform_data/
H A Dadp8860.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
6 * Copyright 2009-2010 Analog Devices Inc.
103 u8 bl_fade_in; /* Backlight Fade-In Timer */
104 u8 bl_fade_out; /* Backlight Fade-Out Timer */
105 u8 bl_fade_law; /* fade-on/fade-off transfer characteristic */
124 * Sinks not assigned to the Backlight can be exposed to
125 * user space using the LEDS CLASS interface
130 u8 led_fade_in; /* LED Fade-In Timer */
131 u8 led_fade_out; /* LED Fade-Out Timer */
132 u8 led_fade_law; /* fade-on/fade-off transfer characteristic */
[all …]
/linux/Documentation/ABI/testing/
H A Dsysfs-driver-hid-multitouch1 What: /sys/bus/usb/devices/<busnum>-<devnum>:<config num>.<interface num>/<hid-bus>:<vendor-id>:<p…
4 Description: The integer value of this attribute corresponds to the
5 quirks actually in place to handle the device's protocol.
6 When read, this attribute returns the current settings (see
7 MT_QUIRKS_* in hid-multitouch.c).
8 When written this attribute change on the fly the quirks, then
9 the protocol to handle the device.
/linux/Documentation/block/
H A Dswitching-sched.rst6 tunables control how the io scheduler works. You can find these entries
11 assuming that you have sysfs mounted on /sys. If you don't have sysfs mounted,
14 # mount none /sys -t sysfs
16 It is possible to change the IO scheduler for a given block device on
17 the fly to select one of mq-deadline, none, bfq, or kyber schedulers -
24 where SCHEDNAME is the name of a defined IO scheduler, and DEV is the
27 The list of defined schedulers can be found by simply doing
28 a "cat /sys/block/DEV/queue/scheduler" - the list of valid names
29 will be displayed, with the currently selected scheduler in brackets::
32 [mq-deadline] kyber bfq none
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/linux/tools/testing/selftests/x86/
H A Dthunks.S1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * thunks.S - assembly helpers for mixed-bitness code
6 * These are little helpers that make it easier to switch bitness on
7 * the fly.
38 // Call the function
45 // Restore the stack
59 .size call32_from_64, .-call32_from_64
61 .section .note.GNU-stack,"",%progbits
H A Dthunks_32.S1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * thunks_32.S - assembly helpers for mixed-bitness code
6 * These are little helpers that make it easier to switch bitness on
7 * the fly.
21 // Save registers which are callee-clobbered by 64-bit ABI
31 // Call the function
36 .code32; push $1f; .code64 /* hack: can't have X86_64_32S relocation in 32-bit ELF */
47 .size call64_from_32, .-call64_from_32
49 .section .note.GNU-stack,"",%progbits
/linux/drivers/message/fusion/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
5 depends on PCI && HAS_IOPORT
17 depends on PCI && SCSI
32 depends on PCI && SCSI
33 depends on SCSI_FC_ATTRS
51 depends on PCI && SCSI
65 int "Maximum number of scatter gather entries (16 - 128)"
69 This option allows you to specify the maximum number of scatter-
70 gather entries per I/O. The driver default is 128, which matches
73 on a per controller instance.
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/linux/net/can/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
10 communications protocol. Development of the CAN bus started in
11 1983 at Robert Bosch GmbH, and the protocol was officially
12 released in 1986. The CAN bus was originally mainly for automotive,
14 applications. More information on the CAN network protocol family
17 If you want CAN support you should say Y here and also to the
18 specific driver for your controller(s) under the Network device
24 tristate "Raw CAN Protocol (raw access with CAN-ID filtering)"
27 The raw CAN protocol option offers access to the CAN bus via
28 the BSD socket API. You probably want to use the raw socket in
[all …]
/linux/security/ipe/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
8 depends on SECURITY && SECURITYFS && AUDIT && AUDITSYSCALL
17 This option enables the Integrity Policy Enforcement LSM
18 allowing users to define a policy to enforce a trust-based access
20 admins to reconfigure trust requirements on the fly
[all...]
/linux/Documentation/cpu-freq/
H A Dindex.rst1 .. SPDX-License-Identifier: GPL-2.0
4 CPUFreq - CPU frequency and voltage scaling code in the Linux(TM) kernel
9 Clock scaling allows you to change the clock speed of the CPUs on the
10 fly. This is a nice method to save battery power, because the lower
11 the clock speed, the less power the CPU consumes.
18 cpu-drivers
19 cpufreq-stats
22 ------------
25 linux-pm@vger.kernel.org.
28 -----
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/linux/include/uapi/linux/
H A Duserfaultfd.h1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
20 * If the UFFDIO_API is upgraded someday, the UFFDIO_UNREGISTER and
22 * userfaultfd.h we assumed the kernel was reading (instead _IOC_READ
23 * means the userland is reading).
67 * 0x3F. UFFDIO_API is the fixed number, everything else can be
68 * changed by implementing a different UFFD_API. If sticking to the
70 * which ioctl the running kernel implements through the ioctl command
71 * bitmask written by the UFFDIO_API.
163 /* userland asks for an API number and the features to enable */
166 * Kernel answers below with the all available features for
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/linux/Documentation/devicetree/bindings/spi/
H A Dmxicy,mx25f0a-spi.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/spi/mxicy,mx25f0a-spi.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Miquel Raynal <miquel.raynal@bootlin.com>
13 - $ref: spi-controller.yaml#
17 const: mxicy,mx25f0a-spi
23 reg-names:
25 - const: regs
26 - const: dirmap
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/linux/drivers/input/joystick/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
7 depends on !UML
11 and the list of supported devices will be displayed. This option
12 doesn't affect the kernel.
14 Please read the file <file:Documentation/input/joydev/joystick.rst> which
23 Say Y here if you have a joystick that connects to the PC
24 gameport. In addition to the usual PC analog joystick, this driver
30 Please read the file <file:Documentation/input/joydev/joystick.rst> which
33 To compile this driver as a module, choose M here: the
40 Say Y here if you have an FPGaming or MadCatz controller using the
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/linux/Documentation/userspace-api/media/v4l/
H A Dvidioc-querystd.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_QUERYSTD - VIDIOC_SUBDEV_QUERYSTD - Sense the video standard received by the current input
38 The hardware may be able to detect the current video standard
40 pointer to a :ref:`v4l2_std_id <v4l2-std-id>` type. The driver
42 supported standards if for example the hardware can only distinguish
43 between 50 and 60 Hz systems. If no signal was detected, then the driver
45 the set must contain all standards supported by the current video input
50 Drivers shall *not* switch the video standard
52 should send the ``V4L2_EVENT_SOURCE_CHANGE`` event (if they support
54 :ref:`VIDIOC_QUERYSTD`. The reason is that a new video standard can mean
[all …]
H A Dvidioc-query-dv-timings.rst1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
13 VIDIOC_QUERY_DV_TIMINGS - VIDIOC_SUBDEV_QUERY_DV_TIMINGS - Sense the DV preset received by the curr…
38 The hardware may be able to detect the current DV timings automatically,
39 similar to sensing the video standard. To do so, applications call
41 :c:type:`v4l2_dv_timings`. Once the hardware detects
42 the timings, it will fill in the timings structure.
47 timings are detected. Instead, drivers should send the
50 The reason is that new timings usually mean different buffer sizes as
51 well, and you cannot change buffer sizes on the fly. In general,
52 applications that receive the Source Change event will have to call
[all …]
/linux/tools/testing/selftests/bpf/
H A Dtrace_helpers.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1)
32 /* open kallsyms and find addresses on the fly, faster than load + search. */
/linux/drivers/scsi/sym53c8xx_2/
H A Dsym_malloc.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
4 * of PCI-SCSI IO processors.
6 * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
8 * This driver is derived from the Linux sym53c8xx driver.
9 * Copyright (C) 1998-2000 Gerard Roudier
11 * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
12 * a port of the FreeBSD ncr driver to Linux-1.2.13.
14 * The original ncr driver has been written for 386bsd and FreeBSD by
16 * Stefan Esser <se@mi.Uni-Koeln.de>
[all …]
/linux/sound/soc/codecs/
H A Dwm8958-dsp2.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * wm8958-dsp2.c -- WM8958 DSP2 support
53 if (wm8994->cur_fw == fw) in wm8958_dsp2_fw()
56 if (fw->size < 32) { in wm8958_dsp2_fw()
57 dev_err(component->dev, "%s: firmware too short (%zd bytes)\n", in wm8958_dsp2_fw()
58 name, fw->size); in wm8958_dsp2_fw()
62 if (memcmp(fw->data, "WMFW", 4) != 0) { in wm8958_dsp2_fw()
63 data32 = get_unaligned_be32(fw->data); in wm8958_dsp2_fw()
64 dev_err(component->dev, "%s: firmware has bad file magic %08x\n", in wm8958_dsp2_fw()
69 len = get_unaligned_be32(fw->data + 4); in wm8958_dsp2_fw()
[all …]
/linux/Documentation/trace/rv/
H A Dlinear_temporal_logic.rst5 ------------
7 Runtime verification monitor is a verification technique which checks that the
8 kernel follows a specification. It does so by using tracepoints to monitor the
9 kernel's execution trace, and verifying that the execution trace sastifies the
12 Initially, the specification can only be written in the form of deterministic
15 the specification language. The automaton is complicated, hard to understand,
16 and error-prone.
18 Thus, RV monitors based on linear temporal logic (LTL) are introduced. This type
19 of monitor uses LTL as specification instead of DA. For some cases, writing the
24 Christel Baier and Joost-Pieter Katoen: Principles of Model Checking, The MIT
[all …]
/linux/arch/arm/include/asm/
H A Dsyscall.h1 /* SPDX-License-Identifier: GPL-2.0 */
5 * See asm-generic/syscall.h for descriptions of what we must do here.
26 return task_thread_info(task)->abi_syscall; in syscall_get_nr()
28 if (task_thread_info(task)->abi_syscall == -1) in syscall_get_nr()
29 return -1; in syscall_get_nr()
31 return task_thread_info(task)->abi_syscall & __NR_SYSCALL_MASK; in syscall_get_nr()
37 (task_thread_info(task)->abi_syscall & __NR_OABI_SYSCALL_BASE); in __in_oabi_syscall()
48 regs->ARM_r0 = regs->ARM_ORIG_r0; in syscall_rollback()
54 unsigned long error = regs->ARM_r0; in syscall_get_error()
61 return regs->ARM_r0; in syscall_get_return_value()
[all …]
/linux/Documentation/input/devices/
H A Dwalkera0701.rst2 Walkera WK-0701 transmitter
5 Walkera WK-0701 transmitter is supplied with a ready to fly Walkera
6 helicopters such as HM36, HM37, HM60. The walkera0701 module enables to use
10 http://zub.fei.tuke.sk/walkera-wk0701/
13 cg-clone http://zub.fei.tuke.sk/GIT/walkera0701-joystick
19 At back side of transmitter S-video connector can be found. Modulation
26 Walkera WK-0701 TX S-VIDEO connector::
29 __ __ S-video: canon25
35 ------- 3 __________________________________|________________ 25 GND
48 (usually irq7) parport must increase if TX is on.
[all …]
/linux/drivers/gpu/drm/amd/display/dc/inc/
H A Dclock_source.h2 * Copyright 2012-15 Advanced Micro Devices, Inc.
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
[all …]
/linux/fs/nfs/
H A Dcache_lib.c1 // SPDX-License-Identifier: GPL-2.0
5 * Helper routines for the NFS client caches
30 MODULE_PARM_DESC(cache_getent, "Path to the client cache upcall program");
33 "the cache upcall is assumed to have failed");
44 cd->name, in nfs_cache_upcall()
48 int ret = -EACCES; in nfs_cache_upcall()
54 * Disable the upcall mechanism if we're getting an ENOENT or in nfs_cache_upcall()
55 * EACCES error. The admin can re-enable it on the fly by using in nfs_cache_upcall()
56 * sysfs to set the 'cache_getent' parameter once the problem in nfs_cache_upcall()
59 if (ret == -ENOENT || ret == -EACCES) in nfs_cache_upcall()
[all …]
/linux/Documentation/filesystems/
H A Dcramfs.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Cramfs - cram a filesystem onto a small ROM
9 It uses the zlib routines to compress a file one page at a time, and
10 allows random page access. The meta-data is not compressed, but is
15 compact also makes it _very_ hard to update on-the-fly), so you have to
16 create the disk image with the "mkcramfs" utility.
20 -----------
24 Maximum filesystem size is a little over 256MB. (The last file on the
27 Only the low 8 bits of gid are stored. The current version of
32 will still have a link count of 1 in the cramfs image.
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