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/Documentation/devicetree/bindings/memory-controllers/ddr/
Djedec,lpddr3-timings.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr3-timings.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LPDDR3 SDRAM AC timing parameters for a given speed-bin
10 - Krzysztof Kozlowski <krzk@kernel.org>
14 const: jedec,lpddr3-timings
19 Maximum DDR clock frequency for the speed-bin, in Hz.
20 Property is deprecated, use max-freq.
23 max-freq:
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Djedec,lpddr2-timings.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr2-timings.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LPDDR2 SDRAM AC timing parameters for a given speed-bin
10 - Krzysztof Kozlowski <krzk@kernel.org>
14 const: jedec,lpddr2-timings
16 max-freq:
19 Maximum DDR clock frequency for the speed-bin, in Hz.
21 min-freq:
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Djedec,lpddr2.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr2.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LPDDR2 SDRAM compliant to JEDEC JESD209-2
10 - Krzysztof Kozlowski <krzk@kernel.org>
13 - $ref: jedec,lpddr-props.yaml#
18 - items:
19 - enum:
20 - elpida,ECB240ABACN
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Djedec,lpddr3.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/ddr/jedec,lpddr3.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: LPDDR3 SDRAM compliant to JEDEC JESD209-3
10 - Krzysztof Kozlowski <krzk@kernel.org>
13 - $ref: jedec,lpddr-props.yaml#
18 - items:
19 - enum:
20 - samsung,K3QF2F20DB
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/Documentation/devicetree/bindings/net/bluetooth/
Dqualcomm-bluetooth.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/net/bluetooth/qualcomm-bluetooth.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Balakrishna Godavarthi <quic_bgodavar@quicinc.com>
11 - Rocky Liao <quic_rjliao@quicinc.com>
14 This binding describes Qualcomm UART-attached bluetooth chips.
19 - qcom,qca2066-bt
20 - qcom,qca6174-bt
21 - qcom,qca9377-bt
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/Documentation/devicetree/bindings/nvmem/
Dnvmem.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
23 "#address-cells":
26 "#size-cells":
29 read-only:
34 wp-gpios:
36 GPIO to which the write-protect pin of the chip is connected.
37 The write-protect GPIO is asserted, when it's driven high
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/Documentation/devicetree/bindings/opp/
Dallwinner,sun50i-h6-operating-points.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/opp/allwinner,sun50i-h6-operating-points.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
20 - $ref: opp-v2-base.yaml#
25 - allwinner,sun50i-h6-operating-points
26 - allwinner,sun50i-h616-operating-points
28 nvmem-cells:
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Doperating-points-v2-ti-cpu.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/opp/operating-points-v2-ti-cpu.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
14 and voltage values based on device type and speed bin information
18 This document extends the operating-points-v2 binding by providing
22 - Dhruva Gole <d-gole@ti.com>
25 - $ref: opp-v2-base.yaml#
29 const: operating-points-v2-ti-cpu
37 opp-shared: true
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/Documentation/driver-api/usb/
Dusb3-debug-port.rst19 3) have a USB 3.0 super-speed A-to-A debugging cable.
30 super-speed port). The debug device is fully compliant with
32 performance full-duplex serial link between the debug target
41 Other uses include simpler, lockless logging instead of a full-
58 "usbcore.autosuspend=-1"
63 should be a USB 3.0 super-speed A-to-A debugging cable.
74 # tail -f /var/log/kern.log
75 [ 1815.983374] usb 4-3: new SuperSpeed USB device number 4 using xhci_hcd
76 [ 1815.999595] usb 4-3: LPM exit latency is zeroed, disabling LPM.
77 [ 1815.999899] usb 4-3: New USB device found, idVendor=1d6b, idProduct=0004
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/Documentation/dev-tools/kunit/
Drunning_tips.rst1 .. SPDX-License-Identifier: GPL-2.0
11 --------------------------
15 .. code-block:: bash
18 ( cd "$(git rev-parse --show-toplevel)" && ./tools/testing/kunit/kunit.py run "$@" )
26 -------------------------
33 .. code-block:: bash
35 $ echo -e 'CONFIG_KUNIT=y\nCONFIG_KUNIT_ALL_TESTS=y' > .kunit/.kunitconfig
40 .. code-block:: bash
42 $ echo -e 'CONFIG_KUNIT=y\nCONFIG_KUNIT_ALL_TESTS=y' > .kunit/.kunitconfig
53 -----------------------
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Drun_wrapper.rst1 .. SPDX-License-Identifier: GPL-2.0
9 manually, see: Documentation/dev-tools/kunit/run_manual.rst.
17 .. code-block::
23 .. code-block::
31 .. code-block::
33 ./tools/testing/kunit/kunit.py run --timeout=30 --jobs=`nproc --all`
35 - ``--timeout`` sets a maximum amount of time for tests to run.
36 - ``--jobs`` sets the number of threads to build the kernel.
45 tests we want to run independently, or if we want to use pre-defined
51 .. code-block::
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/Documentation/admin-guide/media/
Dcec.rst1 .. SPDX-License-Identifier: GPL-2.0
12 - Exynos4
13 - Exynos5
14 - STIH4xx HDMI CEC
15 - V4L2 adv7511 (same HW, but a different driver from the drm adv7511)
16 - stm32
17 - Allwinner A10 (sun4i)
18 - Raspberry Pi
19 - dw-hdmi (Synopsis IP)
20 - amlogic (meson ao-cec and ao-cec-g12a)
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/Documentation/devicetree/bindings/memory-controllers/
Drockchip,rk3399-dmc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/memory-controllers/rockchip,rk3399-dmc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Brian Norris <briannorris@chromium.org>
15 - rockchip,rk3399-dmc
17 devfreq-events:
26 clock-names:
28 - const: dmc_clk
30 operating-points-v2: true
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/Documentation/hid/
Dintel-ish-hid.rst6 processing to a dedicated low power co-processor. This allows the core
11 Sensor usage tables. These may be found in tablets, 2-in-1 convertible laptops
25 for a very high speed communication::
27 ----------------- ----------------------
28 | USB HID | --> | ISH HID |
29 ----------------- ----------------------
30 ----------------- ----------------------
31 | USB protocol | --> | ISH Transport |
32 ----------------- ----------------------
33 ----------------- ----------------------
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/Documentation/fb/
Dfbcon.rst16 etc. Theoretically, multi-colored fonts, blending, aliasing, and any feature
23 configuration tool. It is under Device Drivers->Graphics Support->
24 Console display driver support->Framebuffer Console Support.
31 always be available. However, using a chipset-specific driver will give you
32 more speed and features, such as the ability to change the video mode
36 support->Bootup logo.
38 Also, you will need to select at least one compiled-in font, but if
84 compiled-in fonts: 10x18, 6x10, 6x8, 7x14, Acorn8x8, MINI4x6,
112 3. fbcon=vc:<n1>-<n2>
128 - 0 - normal orientation (0 degree)
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/Documentation/devicetree/bindings/gpu/
Darm,mali-bifrost.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/gpu/arm,mali-bifrost.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Rob Herring <robh@kernel.org>
14 pattern: '^gpu@[a-f0-9]+$'
18 - items:
19 - enum:
20 - amlogic,meson-g12a-mali
21 - mediatek,mt8183-mali
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/Documentation/admin-guide/laptops/
Dlaptop-mode.rst2 How to conserve battery power using laptop-mode
12 ------------
31 ------------
41 located in /etc/default/laptop-mode on Debian-based systems, or in
42 /etc/sysconfig/laptop-mode on other systems.
52 -------
64 * If you mount some of your ext3/reiserfs filesystems with the -n option, then
67 wrong options -- or it will fail because it cannot write to /etc/mtab.
80 -----------
106 -------------
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/Documentation/driver-api/tty/
Dmoxa-smartio.rst25 - 2 ports multiport board
26 CP-102U, CP-102UL, CP-102UF
27 CP-132U-I, CP-132UL,
28 CP-132, CP-132I, CP132S, CP-132IS,
29 (CP-102, CP-102S)
31 - 4 ports multiport board
32 CP-104EL,
33 CP-104UL, CP-104JU,
34 CP-134U, CP-134U-I,
36 CP-114, CP-114I, CP-114S, CP-114IS, CP-114UL,
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/Documentation/admin-guide/
Dspkguide.txt16 Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
25 http://linux-speakup.org/. Speakup is a set of patches to the standard
72 acntsa -- Accent SA
73 acntpc -- Accent PC
74 apollo -- Apollo
75 audptr -- Audapter
76 bns -- Braille 'n Speak
77 dectlk -- DecTalk Express (old and new, db9 serial only)
78 decext -- DecTalk (old) External
79 dtlk -- DoubleTalk PC
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/Documentation/networking/dsa/
Dsja1105.rst8 The NXP SJA1105 is a family of 10 SPI-managed automotive switches:
10 - SJA1105E: First generation, no TTEthernet
11 - SJA1105T: First generation, TTEthernet
12 - SJA1105P: Second generation, no TTEthernet, no SGMII
13 - SJA1105Q: Second generation, TTEthernet, no SGMII
14 - SJA1105R: Second generation, no TTEthernet, SGMII
15 - SJA1105S: Second generation, TTEthernet, SGMII
16 - SJA1110A: Third generation, TTEthernet, SGMII, integrated 100base-T1 and
17 100base-TX PHYs
18 - SJA1110B: Third generation, TTEthernet, SGMII, 100base-T1, 100base-TX
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/Documentation/power/
Dswsusp.rst47 - If you feel ACPI works pretty well on your system, you might try::
51 - If you would like to write hibernation image to swap and then suspend
56 - If you have SATA disks, you'll need recent kernels with SATA suspend
58 are built into kernel -- not modules. [There's way to make
68 - The resume process checks for the presence of the resume device,
72 - The resume process may be triggered in two ways:
81 read-only) otherwise data may be corrupted.
87 Last revised: 2003-10-20 by Pavel Machek
90 -------------------------
163 between 0-640KB. That way, I'd have to make sure that 0-640KB is free
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/Documentation/networking/device_drivers/ethernet/intel/
Dice.rst1 .. SPDX-License-Identifier: GPL-2.0+
8 Copyright(c) 2018-2021 Intel Corporation.
13 - Overview
14 - Identifying Your Adapter
15 - Important Notes
16 - Additional Features & Configurations
17 - Performance Optimization
28 This driver supports XDP (Express Data Path) and AF_XDP zero-copy. Note that
43 -------------------------------------------
54 1) Make sure that your system's physical memory is in a high-performance
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/Documentation/sound/
Dalsa-configuration.rst2 Advanced Linux Sound Architecture - Driver Configuration guide
38 ----------
47 limiting card index for auto-loading (1-8);
49 For auto-loading more than one card, specify this option
50 together with snd-card-X aliases.
63 Module snd-pcm-oss
64 ------------------
86 regarding opening the device. When this option is non-zero,
90 Module snd-rawmidi
91 ------------------
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/Documentation/trace/
Dftrace.rst2 ftrace - Function Tracer
13 - Written for: 2.6.28-rc2
14 - Updated for: 3.10
15 - Updated for: 4.13 - Copyright 2017 VMware Inc. Steven Rostedt
16 - Converted to rst format - Changbin Du <changbin.du@intel.com>
19 ------------
24 performance issues that take place outside of user-space.
41 ----------------------
43 See Documentation/trace/ftrace-design.rst for details for arch porters and such.
47 ---------------
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/Documentation/admin-guide/pm/
Damd-pstate.rst1 .. SPDX-License-Identifier: GPL-2.0
5 ``amd-pstate`` CPU Performance Scaling Driver
16 ``amd-pstate`` is the AMD CPU performance scaling driver that introduces a
20 than legacy ACPI hardware P-States. Current AMD CPU/APU platforms are using
21 the ACPI P-states driver to manage CPU frequency and clocks with switching
22 only in 3 P-states. CPPC replaces the ACPI P-states controls and allows a
23 flexible, low-latency interface for the Linux kernel to directly
26 ``amd-pstate`` leverages the Linux kernel governors such as ``schedutil``,
30 Volume 2: System Programming [1]_). Currently, ``amd-pstate`` supports basic
40 continuous, abstract, and unit-less performance value in a scale that is
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