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/linux/Documentation/admin-guide/media/
H A Ddvb_intro.rst1 .. SPDX-License-Identifier: GPL-2.0
12 structure of DVB-T cards are substantially similar to Analogue TV cards,
30 embedded within the modulated composite analogue signal -
38 signal encoded at a resolution of 768x576 24-bit color pixels over 25
39 frames per second - a fair amount of data is generated and must be
43 encoded and compressed form - similar to the form that is used in
46 The purpose of a simple budget digital TV card (DVB-T,C or S) is to
96 On this example, we're considering tuning into DVB-T channels in
110 Ten 219.500 Mhz
115 The digital TV Scan utilities (like dvbv5-scan) have use a set of
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/linux/Documentation/hwmon/
H A Dadt7470.rst17 -----------
22 The ADT7470 uses the 2-wire interface compatible with the SMBus 2.0
23 specification. Using an analog to digital converter it measures up to ten (10)
24 external temperatures. It has four (4) 16-bit counters for measuring fan speed.
28 that allows fan speed to be adjusted automatically based on any of the ten
45 ----------------
47 The ADT7470 has a 8-bit ADC and is capable of measuring temperatures with 1
54 -------------------
61 * pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
63 - point1: Set the pwm speed at a lower temperature bound.
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H A Ducd9000.rst11 Addresses scanned: -
15 - http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
16 - http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
17 - http://focus.ti.com/lit/ds/symlink/ucd90160.pdf
18 - http://focus.ti.com/lit/ds/symlink/ucd90320.pdf
19 - http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
20 - http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
22 Author: Guenter Roeck <linux@roeck-us.net>
26 -----------
31 sequences up to 12 independent voltage rails. The device integrates a 12-bit
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H A Dw83791d.rst10 Addresses scanned: I2C 0x2c - 0x2f
12 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83791D_W83791Gb.pdf
22 - Frodo Looijaard <frodol@dds.nl>,
23 - Philip Edelbrock <phil@netroedge.com>,
24 - Mark Studebaker <mdsxyz123@yahoo.com>
28 - Shane Huang (Winbond),
29 - Rudolf Marek <r.marek@assembler.cz>
33 - Sven Anders <anders@anduras.de>
34 - Marc Hulsman <m.hulsman@tudelft.nl>
37 -----------------
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/linux/arch/m68k/fpsp040/
H A Ddecbin.S5 | register A6 to extended-precision value in FP0.
9 | Output: Exact floating-point representation of the packed bcd value.
11 | Saves and Modifies: D2-D5
20 | Expected is a normal bcd (i.e. non-exceptional; all inf, zero,
33 | assumed following the least-significant digit.
43 | SM = 0 a non-zero digit in the integer position
44 | SM = 1 a non-zero digit in Mant0, lsd of the fraction
47 | representation (ex. 0.1E2, 1E1, 10E0, 100E-1), is converted
116 .set TEN,10 define
121 moveml %d2-%d5,-(%a7)
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H A Dbindec.S12 | value in memory; d0 contains the k-factor sign-extended
13 | to 32-bits. The input may be either normalized,
18 | Saves and Modifies: D2-D7,A2,FP2
23 | The k-factor is saved for use in d7. Clear the
36 | A4. Clr INEX bit.
45 | k-factor can dictate either the total number of digits,
67 | A9. Scale X -> Y.
74 | compensated for by 'or-ing' in the INEX2 flag to
87 | or less than LEN -1 digits, adjust ILOG and repeat from
96 | such that the decimal point is to the left of bit 63.
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/linux/Documentation/i2c/
H A Dten-bit-addresses.rst2 I2C Ten-bit Addresses
5 The I2C protocol knows about two kinds of device addresses: normal 7 bit
6 addresses, and an extended set of 10 bit addresses. The sets of addresses
7 do not intersect: the 7 bit address 0x10 is not the same as the 10 bit
9 To avoid ambiguity, the user sees 10 bit addresses mapped to a different
10 address space, namely 0xa000-0xa3ff. The leading 0xa (= 10) represents the
11 10 bit mode. This is used for creating device names in sysfs. It is also
12 needed when instantiating 10 bit devices via the new_device file in sysfs.
14 I2C messages to and from 10-bit address devices have a different format.
17 The current 10 bit address support is minimal. It should work, however
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H A Ddev-interface.rst7 the /dev interface. You need to load module i2c-dev for this.
10 examine /sys/class/i2c-dev/ to see what number corresponds to which adapter.
11 Alternatively, you can run "i2cdetect -l" to obtain a formatted list of all
13 the i2c-tools package.
17 explained above. They should be called "i2c-%d" (i2c-0, i2c-1, ...,
18 i2c-10, ...). All 256 minor device numbers are reserved for I2C.
27 #include <linux/i2c-dev.h>
31 inspect /sys/class/i2c-dev/ or run "i2cdetect -l" to decide this.
41 snprintf(filename, 19, "/dev/i2c-%d", adapter_nr);
93 the means of read() and write() calls. In particular, so-called combined
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/linux/lib/
H A Dbitmap.c1 // SPDX-License-Identifier: GPL-2.0-only
32 * endian architectures. See the big-endian headers
33 * include/asm-ppc64/bitops.h and include/asm-s390/bitops.h
83 * __bitmap_shift_right - logical right shift of the bits in a bitmap
89 * Shifting right (dividing) means moving bits in the MS -> LS bit
110 if (off + k + 1 == lim - 1) in __bitmap_shift_right()
112 upper <<= (BITS_PER_LONG - rem); in __bitmap_shift_right()
115 if (off + k == lim - 1) in __bitmap_shift_right()
121 memset(&dst[lim - off], 0, off*sizeof(unsigned long)); in __bitmap_shift_right()
127 * __bitmap_shift_left - logical left shift of the bits in a bitmap
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/linux/Documentation/devicetree/bindings/net/
H A Dfsl,gianfar-mdio.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/fsl,gianfar-mdio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
14 Some TSECs are associated with an internal Ten-Bit Interface (TBI) PHY. This
16 to the mdio buses, except they are compatible with "fsl,gianfar-tbi". The TBI
22 - J. Neuschäfer <j.ne@posteo.net>
24 # This is needed to distinguish gianfar.yaml and gianfar-mdio.yaml, because
28 - properties:
35 - device_type
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/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
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
55 Driver use interrupt from parport ACK input bit to measure pulse length
59 Based on walkera WK-0701 PCM Format description by Shaul Eizikovich.
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/linux/arch/mips/boot/dts/xilfpga/
H A Dnexys4ddr.dts1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
14 stdout-path = "serial0:115200n8";
22 cpuintc: interrupt-controller {
23 #address-cells = <0>;
24 #interrupt-cells = <1>;
25 interrupt-controller;
26 compatible = "mti,cpu-interrupt-controller";
29 axi_intc: interrupt-controller@10200000 {
30 #interrupt-cells = <1>;
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/linux/drivers/scsi/
H A Dimm.h1 /* SPDX-License-Identifier: GPL-2.0 */
17 * 10 Apr 1998 (Good Friday) - Received EN144302 by email from Iomega.
22 * --- SNIP ---
31 * Ten minutes later after a few fixes.... (LITERALLY!!!)
33 * ----- It actually works!!! -----
52 * Err.. It appears that imm-2.00 was broken....
68 /* ------ END OF USER CONFIGURABLE PARAMETERS ----- */
83 /* batteries not included :-) */
89 #define IMM_NIBBLE 1 /* work in standard 4 bit mode */
91 #define IMM_EPP_8 3 /* EPP mode, 8 bit */
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/linux/drivers/net/wireless/ti/wl12xx/
H A Dacx.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (C) 1998-2009, 2011 Texas Instruments. All rights reserved.
6 * Copyright (C) 2008-2010 Nokia Corporation
150 /* the amount of wake on host-access times */
153 /* the amount of wake on timer-expire */
156 /* the number of packets that were transmitted with PS bit set */
159 /* the number of packets that were transmitted with PS bit clear */
186 * cont_miss_bcns_spread[0] - single missed beacon.
187 * cont_miss_bcns_spread[1] - two continuous missed beacons.
188 * cont_miss_bcns_spread[2] - three continuous missed beacons.
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/linux/drivers/watchdog/
H A Dpcwd.c1 // SPDX-License-Identifier: GPL-2.0-only
10 * 960108 Fixed end-of-file pointer (Thanks to Dan Hollis), added
24 * added watchdog disable/re-enable routines. Added firmware
60 #include <linux/errno.h> /* For the -ENODEV/... values */
71 #include <linux/ioport.h> /* For io-port access */
79 #define WATCHDOG_DRIVER_NAME "ISA-PC Watchdog"
94 * These are the auto-probe addresses available.
104 * PCI-PC Watchdog card.
117 on-board processor */
125 (1:SW1 <-> 0:SW2) */
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/linux/drivers/irqchip/
H A Dirq-davinci-cp-intc.c1 // SPDX-License-Identifier: GPL-2.0-only
4 // Copyright (C) 2008-2009, MontaVista Software, Inc. <source@mvista.com>
38 #define DAVINCI_CP_INTC_GPIR_NONE BIT(31)
56 davinci_cp_intc_write(d->hwirq, DAVINCI_CP_INTC_SYS_STAT_IDX_CLR); in davinci_cp_intc_ack_irq()
63 davinci_cp_intc_write(d->hwirq, DAVINCI_CP_INTC_SYS_ENABLE_IDX_CLR); in davinci_cp_intc_mask_irq()
69 davinci_cp_intc_write(d->hwirq, DAVINCI_CP_INTC_SYS_ENABLE_IDX_SET); in davinci_cp_intc_unmask_irq()
77 reg = BIT_WORD(d->hwirq); in davinci_cp_intc_set_irq_type()
78 mask = BIT_MASK(d->hwirq); in davinci_cp_intc_set_irq_type()
100 return -EINVAL; in davinci_cp_intc_set_irq_type()
123 * The interrupt number is in first ten bits. The NONE field set to 1 in davinci_cp_intc_handle_irq()
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/linux/drivers/media/dvb-frontends/drx39xyj/
H A Ddrx_dap_fasi.h2 Copyright (c), 2004-2005,2007-2010 Trident Microsystems, Inc.
48 /*-------- compilation control switches --------------------------------------*/
53 /*-------- Required includes -------------------------------------------------*/
57 /*-------- Defines, configuring the API --------------------------------------*/
98 #error At least one of short- or long-addressing format must be allowed.
121 * Default is single master, DAP FASI changes multi-master setting silently
143 * If ten-bit I2C device addresses are used, the minimum chunk size must be six,
153 * <S> <devR> --- <P>
155 * In multi-master mode, the data must immediately follow the address (an I2C
158 * 10-bit I2C device addresses are used).
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/linux/drivers/spi/
H A Dspi-gpio.c1 // SPDX-License-Identifier: GPL-2.0-or-later
24 * platform_device->driver_data ... points to spi_gpio
26 * spi->controller_state ... reserved for bitbang framework code
28 * spi->controller->dev.driver_data ... points to spi_gpio->bitbang
39 /*----------------------------------------------------------------------*/
43 /*----------------------------------------------------------------------*/
51 bang = spi_controller_get_devdata(spi->controller); in spi_to_spi_gpio()
61 gpiod_set_value_cansleep(spi_gpio->sck, is_on); in setsck()
68 gpiod_set_value_cansleep(spi_gpio->mosi, is_on); in setmosi()
75 if (spi->mode & SPI_3WIRE) in getmiso()
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/linux/Documentation/process/
H A D6.Followthrough.rst11 with, possibly, quite a bit of work yet to be done.
23 ----------------------
31 - If you have explained your patch well, reviewers will understand its
34 like to maintain a kernel with this code in it five or ten years later?
35 Many of the changes you may be asked to make - from coding style tweaks
36 to substantial rewrites - come from the understanding that Linux will
39 - Code review is hard work, and it is a relatively thankless occupation;
47 - Similarly, code reviewers are not trying to promote their employers'
54 - Be prepared for seemingly silly requests for coding style changes
112 -----------------
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H A D4.Coding.rst6 While there is much to be said for a solid and community-oriented design
19 ---------
25 :ref:`Documentation/process/coding-style.rst <codingstyle>`. For much of
38 strangely-formatted code.
43 giving up a degree of control in a number of ways - including control over
49 as a way of getting their name into the kernel changelogs - or both. But
59 80-column limit, for example), just do it.
61 Note that you can also use the ``clang-format`` tool to help you with
62 these rules, to quickly re-format parts of your code automatically,
66 See the file :ref:`Documentation/dev-tools/clang-format.rst <clangformat>`
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/linux/Documentation/netlabel/
H A Ddraft-ietf-cipso-ipsecurity-01.txt27 Please check the I-D abstract listing contained in each Internet Draft
46 mandatory access controls and multi-level security. These systems are
88 once in a datagram. All multi-octet fields in the option are defined to be
91 +----------+----------+------//------+-----------//---------+
93 +----------+----------+------//------+-----------//---------+
116 This field is an unsigned 32 bit integer. The value 0 is reserved and MUST
124 corresponding ASCII representations. Non-related groups of systems may
148 actual security information to be passed. All multi-octet fields in a tag
171 +----------+----------+--------//--------+
173 +----------+----------+--------//--------+
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/linux/arch/microblaze/boot/dts/
H A Dsystem.dts1 // SPDX-License-Identifier: GPL-2.0-or-later
5 * (C) Copyright 2007-2008 Xilinx, Inc.
6 * (C) Copyright 2007-2009 Michal Simek
13 * XPS project directory: Xilinx-ML505-ll_temac-sgdma-MMU-FDT-edk101
16 /dts-v1/;
18 #address-cells = <1>;
19 #size-cells = <1>;
32 stdout-path = "/plb@0/serial@84000000";
35 #address-cells = <1>;
37 #size-cells = <0>;
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/linux/drivers/net/wireless/ti/wl1251/
H A Dacx.h1 /* SPDX-License-Identifier: GPL-2.0-only */
5 * Copyright (c) 1998-2007 Texas Instruments Incorporated
70 * bits 0 - 15: Reserved.
71 * bits 16 - 23: Version ID - The WiLink version ID
73 * bits 24 - 31: Chip ID - The WiLink chip ID.
93 /* 0 - Always active*/
94 /* 1 - Power down mode: light / fast sleep*/
95 /* 2 - ELP mode: Deep / Max sleep*/
188 * Bit Definition
191 * 13 Copy RX Status - when set, write three receive status words
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/linux/drivers/net/ethernet/freescale/
H A Ducc_geth.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) Freescale Semicondutor, Inc. 2006-2009. All rights reserved.
12 * - Rearrange code and style fixes
41 u8 res0[0x100 - sizeof(struct ucc_fast)];
46 u32 hafdup; /* half-duplex reg. */
57 u8 res3[0x180 - 0x15A];
86 successfully with the group address bit set
98 successfully with the group address bit set
105 u8 res5[0x200 - 0x1c4];
119 #define TEMODER_NUM_OF_QUEUES_SHIFT (15-15) /* Number of queues <<
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/linux/samples/trace_events/
H A Dtrace-events-sample.h1 /* SPDX-License-Identifier: GPL-2.0 */
8 * In this case, it would look for sample-trace.h
14 * This file is called trace-events-sample.h but we want the system
15 * to be called "sample-trace". Therefore we must define the name of this
18 * #define TRACE_INCLUDE_FILE trace-events-sample
26 #define TRACE_SYSTEM sample-trace
29 * TRACE_SYSTEM is expected to be a C valid variable (alpha-numeric
36 * But the above is only needed if TRACE_SYSTEM is not alpha-numeric
38 * TRACE_SYSTEM. As TRACE_SYSTEM_VAR must be alpha-numeric, if
40 * only alpha-numeric and underscores.
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