| /linux/Documentation/devicetree/bindings/mfd/ |
| H A D | ams,as3711.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
15 two step-up DC/DC converters are defined.
26 Step-up converter configuration, to be used as a backlight source
31 const: ams,as3711-bl
33 su1-dev:
34 description: Framebuffer phandle for the first step-up converter
37 su1-max-uA:
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| /linux/Documentation/admin-guide/pm/ |
| H A D | suspend-flows.rst | 1 .. SPDX-License-Identifier: GPL-2.0
12 At least one global system-wide transition needs to be carried out for the
14 :doc:`sleep states <sleep-states>`. Hibernation requires more than one
16 referred to as *system-wide suspend* (or simply *system suspend*) states, need
27 significant differences between the :ref:`suspend-to-idle <s2idle>` code flows
28 and the code flows related to the :ref:`suspend-to-RAM <s2ram>` and
31 The :ref:`suspend-to-RAM <s2ram>` and :ref:`standby <standby>` sleep states
33 boils down to the platform-specific actions carried out by the suspend and
37 *platform-dependent suspend* states in what follows.
42 Suspend-to-idle Suspend Code Flow
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| /linux/sound/soc/fsl/ |
| H A D | fsl_audmix.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
20 #define FSL_AUDMIX_ATSTPUP0 0x210 /* Attenuation step up factor */
21 #define FSL_AUDMIX_ATSTPDN0 0x214 /* Attenuation step down factor */
22 #define FSL_AUDMIX_ATSTPTGT0 0x218 /* Attenuation step target */
24 #define FSL_AUDMIX_ATSTP0 0x220 /* Attenuation step number */
28 #define FSL_AUDMIX_ATSTPUP1 0x230 /* Attenuation step up factor */
29 #define FSL_AUDMIX_ATSTPDN1 0x234 /* Attenuation step down factor */
30 #define FSL_AUDMIX_ATSTPTGT1 0x238 /* Attenuation step target */
32 #define FSL_AUDMIX_ATSTP1 0x240 /* Attenuation step number */
79 /* AUDMIX Attenuation Step Up Factor Register */
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| /linux/Documentation/admin-guide/ |
| H A D | verify-bugs-and-bisect-regressions.rst | 1 .. SPDX-License-Identifier: (GPL-2.0+ OR CC-BY-4.0)
9 currently supported by developers -- to then explain how to locate the change
22 read and navigate this document -- especially when you want to look something
23 up in the reference section, then jump back to where you left off.
26 https://docs.kernel.org/admin-guide/verify-bugs-and-bisect-regressions.html
32 over to the* ':ref:`step-by-step guide <introguide_bissbs>`' *below. It utilizes
45 *segment 2*. Then you can submit a preliminary report -- or continue with
47 full-fledged regression report. In the following example 6.0.13 is assumed to be
51 * **Preparations**: set up everything to build your own kernels::
55 # * Ensure Secure Boot permits booting self-compiled Linux kernels.
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| H A D | quickly-build-trimmed-linux.rst | 1 .. SPDX-License-Identifier: (GPL-2.0+ OR CC-BY-4.0)
9 testing purposes, but perfectly fine for day-to-day use, too.
15 section below: it contains a step-by-step guide, which is more detailed, but
21 self-compiled Linux kernels; install compilers and everything else needed for
26 git clone --depth 1 -b master \
34 make -j $(nproc --all)
37 command -v installkernel && sudo make modules_install install
43 git fetch --depth 1 origin
45 git checkout --force --detach origin/master
49 make -j $(nproc --all)
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| /linux/include/linux/ |
| H A D | iov_iter.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
25 iov_ustep_f step) in iterate_ubuf() argument
27 void __user *base = iter->ubuf; in iterate_ubuf()
30 remain = step(base + iter->iov_offset, 0, len, priv, priv2); in iterate_ubuf()
31 progress = len - remain; in iterate_ubuf()
32 iter->iov_offset += progress; in iterate_ubuf()
33 iter->count -= progress; in iterate_ubuf()
42 iov_ustep_f step) in iterate_iovec() argument
44 const struct iovec *p = iter->__iov; in iterate_iovec()
45 size_t progress = 0, skip = iter->iov_offset; in iterate_iovec()
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| /linux/Documentation/admin-guide/device-mapper/ |
| H A D | vdo-design.rst | 1 .. SPDX-License-Identifier: GPL-2.0-only
4 Design of dm-vdo
7 The dm-vdo (virtual data optimizer) target provides inline deduplication,
8 compression, zero-block elimination, and thin provisioning. A dm-vdo target
9 can be backed by up to 256TB of storage, and can present a logical size of
10 up to 4PB. This target was originally developed at Permabit Technology
12 production environments ever since. It was made open-source in 2017 after
14 dm-vdo. For usage, see vdo.rst in the same directory as this file.
18 deduplication rates of 254:1, i.e. up to 254 copies of a given 4K block can
25 The design of dm-vdo is based on the idea that deduplication is a two-part
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| /linux/arch/x86/kvm/mmu/ |
| H A D | tdp_iter.c | 1 // SPDX-License-Identifier: GPL-2.0
14 iter->sptep = iter->pt_path[iter->level - 1] + in tdp_iter_refresh_sptep()
15 SPTE_INDEX(iter->gfn << PAGE_SHIFT, iter->level); in tdp_iter_refresh_sptep()
16 iter->old_spte = kvm_tdp_mmu_read_spte(iter->sptep); in tdp_iter_refresh_sptep()
25 iter->yielded = false; in tdp_iter_restart()
26 iter->yielded_gfn = iter->next_last_level_gfn; in tdp_iter_restart()
27 iter->level = iter->root_level; in tdp_iter_restart()
29 iter->gfn = gfn_round_for_level(iter->next_last_level_gfn, iter->level); in tdp_iter_restart()
32 iter->valid = true; in tdp_iter_restart()
36 * Sets a TDP iterator to walk a pre-order traversal of the paging structure
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| /linux/drivers/usb/host/ |
| H A D | xhci-pci-renesas.c | 1 // SPDX-License-Identifier: GPL-2.0
2 /* Copyright (C) 2019-2020 Linaro Limited */
12 #include "xhci-trace.h"
13 #include "xhci-pci.h"
56 const u32 *fw, size_t step, bool rom) in renesas_fw_download_image() argument
70 * The hardware does alternate between two 32-bit pages. in renesas_fw_download_image()
75 data0_or_data1 = (step & 1) == 1; in renesas_fw_download_image()
77 /* step+1. Read "Set DATAX" and confirm it is cleared. */ in renesas_fw_download_image()
81 dev_err(&dev->dev, "Read Status failed: %d\n", in renesas_fw_download_image()
91 dev_err(&dev->dev, "Timeout for Set DATAX step: %zd\n", step); in renesas_fw_download_image()
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| /linux/Documentation/core-api/ |
| H A D | cpu_hotplug.rst | 26 A more novel use of CPU-hotplug support is its use today in suspend resume
27 support for SMP. Dual-core and HT support makes even a laptop run SMP kernels
75 from the map depending on the event is hot-add/hot-remove. There are currently
80 be read-only for most use. When setting up per-cpu resources almost always use
94 $ ls -lh /sys/devices/system/cpu
96 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu0
97 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu1
98 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu2
99 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu3
100 drwxr-xr-x 9 root root 0 Dec 21 16:33 cpu4
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| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | ext-ctrls-fm-tx.rst | 1 .. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
3 .. _fm-tx-controls:
15 .. _fm-tx-control-id:
27 step are driver-specific.
33 Sets the RDS Programme Type field for transmission. This encodes up
34 to 31 pre-defined programme types.
52 programme-related information or any other text. In these cases,
97 up to 25 frequencies to be defined. Drivers may support fewer
103 receiver-generated distortion and prevent overmodulation.
107 useconds. Step and range are driver-specific.
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| /linux/block/ |
| H A D | blk-wbt.c | 1 // SPDX-License-Identifier: GPL-2.0
6 * - Monitor latencies in a defined window of time.
7 * - If the minimum latency in the above window exceeds some target, increment
8 * scaling step and scale down queue depth by a factor of 2x. The monitoring
9 * window is then shrunk to 100 / sqrt(scaling step + 1).
10 * - For any window where we don't have solid data on what the latencies
12 * - If latencies look good, decrement scaling step.
13 * - If we're only doing writes, allow the scaling step to go negative. This
15 * scaling step of 0 if reads show up or the heavy writers finish. Unlike
17 * scaling step retains the default step==0 window size.
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| /linux/drivers/clk/tegra/ |
| H A D | cvb.c | 1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2012-2019 NVIDIA Corporation. All rights reserved.
20 mv = DIV_ROUND_CLOSEST(cvb->c2 * speedo, s_scale); in get_cvb_voltage()
21 mv = DIV_ROUND_CLOSEST((mv + cvb->c1) * speedo, s_scale) + cvb->c0; in get_cvb_voltage()
28 /* combined: apply voltage scale and round to cvb alignment step */ in round_cvb_voltage()
30 int step = (align->step_uv ? : 1000) * v_scale; in round_cvb_voltage() local
31 int offset = align->offset_uv * v_scale; in round_cvb_voltage()
33 uv = max(mv * 1000, offset) - offset; in round_cvb_voltage()
34 uv = DIV_ROUND_UP(uv, step) * align->step_uv + align->offset_uv; in round_cvb_voltage()
40 UP enumerator
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| /linux/arch/arm/mach-omap1/ |
| H A D | pm.c | 2 * linux/arch/arm/mach-omap1/pm.c
55 #include <linux/soc/ti/omap1-io.h>
57 #include <linux/omap-dma.h>
58 #include <clocksource/timer-ti-dm.h>
91 return -EINVAL; in idle_store()
163 * Turn off all interrupts except GPIO bank 1, L1-2nd level cascade, in omap_pm_wakeup_setup()
166 * wake up to a GPIO interrupt. in omap_pm_wakeup_setup()
213 * Step 1: turn off interrupts (FIXME: NOTE: already disabled) in omap1_pm_suspend()
220 * Step 2: save registers in omap1_pm_suspend()
263 /* (Step 3 removed - we now allow deep sleep by default) */ in omap1_pm_suspend()
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| /linux/Documentation/devicetree/bindings/sound/ |
| H A D | cs35l33.txt | 5 - compatible : "cirrus,cs35l33"
7 - reg : the I2C address of the device for I2C
9 - VA-supply, VP-supply : power supplies for the device,
15 - reset-gpios : gpio used to reset the amplifier
17 - interrupts : IRQ line info CS35L33.
18 (See Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
21 - cirrus,boost-ctl : Booster voltage use to supply the amp. If the value is
23 a value of 1 and will increase at a step size of 100mV until a maximum of
26 - cirrus,ramp-rate : On power up, it affects the time from when the power
27 up sequence begins to the time the audio reaches a full-scale output.
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| /linux/Documentation/devicetree/bindings/input/touchscreen/ |
| H A D | ti,am3359-tsc.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/input/touchscreen/ti,am3359-tsc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Miquel Raynal <miquel.raynal@bootlin.com>
14 const: ti,am3359-tsc
22 ti,x-plate-resistance:
26 ti,coordinate-readouts:
28 step is used to read a single coordinate. A single readout is enough but
36 ti,wire-config:
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| /linux/drivers/pinctrl/mediatek/ |
| H A D | pinctrl-mtk-common.h | 1 /* SPDX-License-Identifier: GPL-2.0-only */
12 #include <linux/pinctrl/pinconf-generic.h>
14 #include "mtk-eint.h"
61 #define SET_ADDR(x, y) (x + (y->devdata->port_align))
62 #define CLR_ADDR(x, y) (x + (y->devdata->port_align << 1))
71 * struct mtk_drv_group_desc - Provide driving group data.
76 * @step: The step current of this group.
83 unsigned char step; member
92 .step = _step, \
96 * struct mtk_pin_drv_grp - Provide each pin driving info.
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| /linux/Documentation/input/devices/ |
| H A D | sentelic.rst | 8 :Copyright: |copy| 2002-2011 Sentelic Corporation.
10 :Last update: Dec-07-2011
28 BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
30 |---------------| |---------------| |---------------| |---------------|
40 Byte 2: X Movement(9-bit 2's complement integers)
41 Byte 3: Y Movement(9-bit 2's complement integers)
43 valid values, -8 ~ +7
51 - Set bit 1 in register 0x40 to 1
60 BYTE |---------------|BYTE |---------------|BYTE|---------------|BYTE|---------------|
62 |---------------| |---------------| |---------------| |---------------|
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| /linux/drivers/infiniband/hw/hfi1/ |
| H A D | firmware.c | 1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
3 * Copyright(c) 2015 - 2017 Intel Corporation.
103 #define AUGMENT_SIZE (sizeof(struct augmented_firmware_file) - \
217 * Read a single 64-bit value from 8051 data memory.
220 * o caller to have already set up data read, no auto increment
224 * ignored - i.e. the hardware will always do aligned 8-byte reads as if
227 * Return 0 on success, -ENXIO on a read error (timeout).
234 /* step 1: set the address, clear enable */ in __read_8051_data()
238 /* step 2: enable */ in __read_8051_data()
250 return -ENXIO; in __read_8051_data()
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| /linux/drivers/gpu/drm/panel/ |
| H A D | panel-novatek-nt35510.c | 1 // SPDX-License-Identifier: GPL-2.0-only
14 * the code needed to set up and configure the panel will be similar,
16 * per-panel, e.g. for physical size.
21 * I2C or SPI interface for setting up the NT35510. If this is needed
146 * struct nt35510_config - the display-specific NT35510 configuration
172 * +------------------------------------------->
206 * @bt1ctr: setting for boost power control for the AVDD step-up
209 * frequency for the step-up circuit:
219 * amplification for the step-up circuit:
230 * @avee: setting for AVEE ranging from 0x00 = -6.5V to 0x14 = -4.5V
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| /linux/arch/arm64/kvm/ |
| H A D | debug.c | 1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2015 - Linaro Ltd
12 #include <asm/debug-monitors.h>
36 * When single-step is enabled by userspace, we tweak PSTATE.SS on every
38 * for the vcpu after the single-step is disabled.
44 vcpu->arch.guest_debug_preserved.mdscr_el1 = val; in save_guest_debug_regs()
47 vcpu->arch.guest_debug_preserved.mdscr_el1); in save_guest_debug_regs()
49 vcpu->arch.guest_debug_preserved.pstate_ss = in save_guest_debug_regs()
55 u64 val = vcpu->arch.guest_debug_preserved.mdscr_el1; in restore_guest_debug_regs()
62 if (vcpu->arch.guest_debug_preserved.pstate_ss) in restore_guest_debug_regs()
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| /linux/Documentation/devicetree/bindings/leds/ |
| H A D | maxim,max77693.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Krzysztof Kozlowski <krzk@kernel.org>
16 There are two LED outputs available - FLED1 and FLED2. Each of them can
26 const: maxim,max77693-led
28 maxim,boost-mode:
30 In boost mode the device can produce up to 1.2A of total current on both
34 See LEDS_BOOST_* in include/dt-bindings/leds/common.h.
38 maxim,boost-mvout:
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| /linux/kernel/ |
| H A D | cpu.c | 36 #include <linux/percpu-rwsem.h>
48 * struct cpuhp_cpu_state - Per cpu hotplug state storage
57 * @node: Remote CPU node; for multi-instance, do a
59 * @last: For multi-instance rollback, remember how far we got
63 * @done_up: Signal completion to the issuer of the task for cpu-up
64 * @done_down: Signal completion to the issuer of the task for cpu-down
96 STATIC_LOCKDEP_MAP_INIT("cpuhp_state-up", &cpuhp_state_up_map);
98 STATIC_LOCKDEP_MAP_INIT("cpuhp_state-down", &cpuhp_state_down_map);
118 * struct cpuhp_step - Hotplug state machine step
119 * @name: Name of the step
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| /linux/mm/ |
| H A D | shrinker.c | 1 // SPDX-License-Identifier: GPL-2.0
29 unit = info->unit; in shrinker_unit_free()
30 nr = DIV_ROUND_UP(info->map_nr_max, SHRINKER_UNIT_BITS); in shrinker_unit_free()
45 int nr = DIV_ROUND_UP(new->map_nr_max, SHRINKER_UNIT_BITS); in shrinker_unit_alloc()
46 int start = old ? DIV_ROUND_UP(old->map_nr_max, SHRINKER_UNIT_BITS) : 0; in shrinker_unit_alloc()
53 return -ENOMEM; in shrinker_unit_alloc()
56 new->unit[i] = unit; in shrinker_unit_alloc()
69 pn = memcg->nodeinfo[nid]; in free_shrinker_info()
70 info = rcu_dereference_protected(pn->shrinker_info, true); in free_shrinker_info()
73 rcu_assign_pointer(pn->shrinker_info, NULL); in free_shrinker_info()
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| /linux/drivers/staging/sm750fb/ |
| H A D | ddk750_sii164.c | 1 // SPDX-License-Identifier: GPL-2.0
79 * edge_select - Edge Select:
84 * bus_select - Input Bus Select:
85 * 0 = Input data bus is 12-bits wide
86 * 1 = Input data bus is 24-bits wide
87 * dual_edge_clk_select - Dual Edge Clock Select
90 * hsync_enable - Horizontal Sync Enable:
93 * vsync_enable - Vertical Sync Enable:
96 * deskew_enable - De-skewing Enable:
97 * 0 = De-skew disabled
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