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/linux-6.14.4/Documentation/driver-api/usb/
Dpower-management.rst1 .. _usb-power-management:
7 :Date: Last-updated: February 2014
11 ---------
17 * Changing the default idle-delay time
31 -------------------------
34 parts of a computer system when they aren't being used. While a
35 component is ``suspended`` it is in a nonfunctional low-power state; it
36 might even be turned off completely. A suspended component can be
37 ``resumed`` (returned to a functional full-power state) when the kernel
40 suspended; an example would be reducing the CPU's clock rate. This
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/linux-6.14.4/Documentation/ABI/testing/
Dsysfs-class-remoteproc19 - "offline"
20 - "suspended"
21 - "running"
22 - "crashed"
23 - "invalid"
25 "offline" means the remote processor is powered off.
27 "suspended" means that the remote processor is suspended and
41 - "start"
42 - "stop"
55 Contact: Suman Anna <s-[email protected]>
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/linux-6.14.4/arch/arm/include/asm/
Dmcpm.h1 /* SPDX-License-Identifier: GPL-2.0-only */
6 * Copyright: (C) 2012-2013 Linaro Limited
15 * This should be sufficient for quite a while, while keeping the
40 * branch once it is ready to re-enter the kernel using ptr, or NULL if it
59 * mcpm_is_available - returns whether MCPM is initialized and available
66 * mcpm_cpu_power_up - make given CPU in given cluster runable
71 * The identified CPU is brought out of reset. If the cluster was powered
87 * mcpm_cpu_power_down - power the calling CPU down
89 * The calling CPU is powered down.
92 * then the cluster is prepared for power-down too.
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/linux-6.14.4/Documentation/devicetree/bindings/tpm/
Dtpm-common.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/tpm/tpm-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Lukas Wunner <[email protected]>
14 pattern: '^tpm(@[0-9a-f]+)?$'
23 linux,sml-base:
28 linux,sml-size:
33 memory-region:
37 powered-while-suspended:
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/linux-6.14.4/drivers/net/wireless/ti/wlcore/
Dsdio.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2009-2010 Nokia Corporation
44 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); in wl1271_sdio_set_block_size()
45 struct sdio_func *func = dev_to_sdio_func(glue->dev); in wl1271_sdio_set_block_size()
56 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); in wl12xx_sdio_raw_read()
57 struct sdio_func *func = dev_to_sdio_func(glue->dev); in wl12xx_sdio_raw_read()
63 dev_dbg(child->parent, "sdio read 52 addr 0x%x, byte 0x%02x\n", in wl12xx_sdio_raw_read()
71 dev_dbg(child->parent, "sdio read 53 addr 0x%x, %zu bytes\n", in wl12xx_sdio_raw_read()
78 dev_err_ratelimited(child->parent, "sdio read failed (%d)\n", ret); in wl12xx_sdio_raw_read()
94 struct wl12xx_sdio_glue *glue = dev_get_drvdata(child->parent); in wl12xx_sdio_raw_write()
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/linux-6.14.4/Documentation/arch/arm/
Dcluster-pm-race-avoidance.rst2 Cluster-wide Power-up/power-down race avoidance algorithm
16 ---------
27 of independently running CPUs, while the OS continues to run. This
29 cluster-level operations are only performed when it is truly safe to do
35 disabling those mechanisms may itself be a non-atomic operation (such as
38 power-down and power-up at the cluster level.
42 lightweight as possible, while providing the required safety properties.
46 -----------
50 - DOWN
51 - COMING_UP
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/linux-6.14.4/drivers/pmdomain/
Dgovernor.c1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain_governor.c - Governors for device PM domains.
20 if (dev->power.subsys_data && dev->power.subsys_data->domain_data) { in dev_update_qos_constraint()
21 struct gpd_timing_data *td = dev_gpd_data(dev)->td; in dev_update_qos_constraint()
24 * Only take suspend-time QoS constraints of devices into in dev_update_qos_constraint()
26 * been suspended are not guaranteed to be taken into account in dev_update_qos_constraint()
28 * be resumed and suspended again. in dev_update_qos_constraint()
30 constraint_ns = td ? td->effective_constraint_ns : in dev_update_qos_constraint()
50 * default_suspend_ok - Default PM domain governor routine to suspend devices.
57 struct gpd_timing_data *td = dev_gpd_data(dev)->td; in default_suspend_ok()
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Dcore.c1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/domain.c - Common code related to device power domains.
37 __routine = genpd->dev_ops.callback; \
56 mutex_lock(&genpd->mlock); in genpd_lock_mtx()
62 mutex_lock_nested(&genpd->mlock, depth); in genpd_lock_nested_mtx()
67 return mutex_lock_interruptible(&genpd->mlock); in genpd_lock_interruptible_mtx()
72 return mutex_unlock(&genpd->mlock); in genpd_unlock_mtx()
83 __acquires(&genpd->slock) in genpd_lock_spin()
87 spin_lock_irqsave(&genpd->slock, flags); in genpd_lock_spin()
88 genpd->lock_flags = flags; in genpd_lock_spin()
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/linux-6.14.4/drivers/char/tpm/eventlog/
Dof.c1 // SPDX-License-Identifier: GPL-2.0-or-later
8 * Maintained by: <tpmdd-[email protected]>
31 node = of_parse_phandle(chip->dev.parent->of_node, "memory-region", 0); in tpm_read_log_memory_region()
33 return -ENODEV; in tpm_read_log_memory_region()
40 chip->log.bios_event_log = devm_memremap(&chip->dev, res.start, resource_size(&res), in tpm_read_log_memory_region()
42 if (IS_ERR(chip->log.bios_event_log)) in tpm_read_log_memory_region()
43 return -ENOMEM; in tpm_read_log_memory_region()
45 chip->log.bios_event_log_end = chip->log.bios_event_log + resource_size(&res); in tpm_read_log_memory_region()
47 return chip->flags & TPM_CHIP_FLAG_TPM2 ? EFI_TCG2_EVENT_LOG_FORMAT_TCG_2 : in tpm_read_log_memory_region()
60 log = &chip->log; in tpm_read_log_of()
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/linux-6.14.4/Documentation/driver-api/pm/
Ddevices.rst1 .. SPDX-License-Identifier: GPL-2.0
10 :Copyright: |copy| 2010-2011 Rafael J. Wysocki <[email protected]>, Novell Inc.
18 management (PM) code is also driver-specific. Most drivers will do very
22 This writeup gives an overview of how drivers interact with system-wide
25 background for the domain-specific work you'd do with any specific driver.
31 Drivers will use one or both of these models to put devices into low-power
36 Drivers can enter low-power states as part of entering system-wide
37 low-power states like "suspend" (also known as "suspend-to-RAM"), or
39 "suspend-to-disk").
42 by implementing various role-specific suspend and resume methods to
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/linux-6.14.4/Documentation/power/
Duserland-swsusp.rst96 swap files (see Documentation/power/swsusp-and-swap-files.rst for
109 immediately enter the suspend-to-RAM state, so this call must always
112 is needed to implement the suspend-to-both mechanism in which the
113 suspend image is first created, as though the system had been suspended
114 to disk, and then the system is suspended to RAM (this makes it possible
121 - you cannot read() more than one virtual memory page at a time
122 - read()s across page boundaries are impossible (ie. if you read() 1/2 of
153 While executing SNAPSHOT_ATOMIC_RESTORE the kernel checks if the
156 SNAPSHOT_ATOMIC_RESTORE will not succeed. Still, this is not a fool-proof
175 system MUST be powered off or rebooted after the snapshot
Dpci.rst13 power management refer to Documentation/driver-api/pm/devices.rst and
27 1.1. Native and Platform-Based Power Management
28 -----------------------------------------------
31 devices into states in which they draw less power (low-power states) at the
34 Usually, a device is put into a low-power state when it is underutilized or
36 again, it has to be put back into the "fully functional" state (full-power
41 PCI devices may be put into low-power states in two ways, by using the device
53 to put the device that sent it into the full-power state. However, the PCI Bus
68 Thus in many situations both the native and the platform-based power management
72 --------------------------------
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Dfreezing-of-tasks.rst11 kernel threads are controlled during hibernation or system-wide suspend (on some
17 There is one per-task flag (PF_NOFREEZE) and three per-task states
23 to system-wide suspend too).
26 freeze_processes() (defined in kernel/power/process.c) is called. A system-wide
27 static key freezer_active (as opposed to a per-task flag or state) is used to
45 signal-handling code, but the freezable kernel threads need to call it
54 while (true) {
61 oom_reaper_list = tsk->oom_reaper_list;
73 entire system-wide transition will be cancelled. For this reason, freezable
84 -------------------------------------------------------------------------
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/linux-6.14.4/Documentation/core-api/
Dtimekeeping.rst10 ------------------------------
27 Like ktime_get(), but does not stop when suspended. This can be
60 -----------------------------------------
92 Return a coarse-grained version of the time as a scalar
98 -------------------------
117 These are quicker than the non-coarse versions, but less accurate,
139 a non-maskable interrupt (NMI) during a timekeeper update, and
140 while we are entering suspend with the clocksource powered down.
146 --------------------------
149 but may appear in third-party drivers being ported here. In particular,
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/linux-6.14.4/drivers/usb/gadget/udc/
Dat91_udc.c1 // SPDX-License-Identifier: GPL-2.0+
3 * at91_udc -- driver for at91-series USB peripheral controller
33 #include <linux/mfd/syscon/atmel-matrix.h>
39 * This controller is simple and PIO-only. It's used in many AT91-series
41 * at91sam926x (arm926ejs, with MMU), and several no-mmu versions.
76 EP_INFO("ep3-int",
91 __raw_readl((udc)->udp_baseaddr + (reg))
93 __raw_writel((val), (udc)->udp_baseaddr + (reg))
95 /*-------------------------------------------------------------------------*/
109 "control", "out-iso", "out-bulk", "out-int", in proc_ep_show()
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Dmax3420_udc.c1 // SPDX-License-Identifier: GPL-2.0+
6 * (C) Copyright 2019-2020 Linaro Ltd
180 bool suspended; member
189 #define DRIVER_DESC "MAX3420 USB Device-Mode Driver"
190 static const char driver_name[] = "max3420-udc";
201 struct spi_device *spi = udc->spi; in spi_ack_ctrl()
220 struct spi_device *spi = udc->spi; in spi_rd8_ack()
247 struct spi_device *spi = udc->spi; in spi_wr8_ack()
273 struct spi_device *spi = udc->spi; in spi_rd_buf()
295 struct spi_device *spi = udc->spi; in spi_wr_buf()
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/linux-6.14.4/drivers/bluetooth/
Dhci_intel.c1 // SPDX-License-Identifier: GPL-2.0-or-later
109 struct intel_data *intel = hu->priv; in intel_wait_booting()
112 err = wait_on_bit_timeout(&intel->flags, STATE_BOOTING, in intel_wait_booting()
116 if (err == -EINTR) { in intel_wait_booting()
117 bt_dev_err(hu->hdev, "Device boot interrupted"); in intel_wait_booting()
118 return -EINTR; in intel_wait_booting()
122 bt_dev_err(hu->hdev, "Device boot timeout"); in intel_wait_booting()
123 return -ETIMEDOUT; in intel_wait_booting()
132 struct intel_data *intel = hu->priv; in intel_wait_lpm_transaction()
135 err = wait_on_bit_timeout(&intel->flags, STATE_LPM_TRANSACTION, in intel_wait_lpm_transaction()
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/linux-6.14.4/drivers/input/touchscreen/
Dads7846.c1 // SPDX-License-Identifier: GPL-2.0-only
10 * - corgi_ts.c
11 * Copyright (C) 2004-2005 Richard Purdie
12 * - omap_ts.[hc], ads7846.h, ts_osk.c
39 * Support for ads7843 tested on Atmel at91sam926x-EK.
53 * note. The strength of filtering can be set in the board-* specific
76 * driver is used with DMA-based SPI controllers (like atmel_spi) on
77 * systems where main memory is not DMA-coherent (most non-x86 boards).
135 bool suspended; /* P: lock */ member
152 /* leave chip selected when we're done, for quicker re-select? */
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/linux-6.14.4/drivers/usb/gadget/udc/aspeed-vhub/
Dhub.c1 // SPDX-License-Identifier: GPL-2.0+
3 * aspeed-vhub -- Driver for Aspeed SoC "vHub" USB gadget
5 * hub.c - virtual hub handling
26 #include <linux/dma-mapping.h>
38 * - We may need to indicate TT support
39 * - We may need a device qualifier descriptor
41 * - Make vid/did overridable
42 * - make it look like usb1 if usb1 mode forced
145 * These strings converted to UTF-16 must be smaller than
177 * Mark it as self-powered, I doubt the BMC is powered off in ast_vhub_hub_dev_status()
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/linux-6.14.4/arch/arm/boot/dts/rockchip/
Drk3288-veyron.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
8 #include <dt-bindings/clock/rockchip,rk808.h>
9 #include <dt-bindings/input/input.h>
18 stdout-path = "serial2:115200n8";
31 power_button: power-button {
32 compatible = "gpio-keys";
33 pinctrl-names = "default";
34 pinctrl-0 = <&pwr_key_l>;
36 key-power {
40 debounce-interval = <100>;
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/linux-6.14.4/arch/arm64/boot/dts/rockchip/
Drk3399-gru-kevin.dts1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
3 * Google Gru-Kevin Rev 6+ board device tree source
5 * Copyright 2016-2017 Google, Inc
8 /dts-v1/;
9 #include "rk3399-gru-chromebook.dtsi"
10 #include <dt-bindings/input/linux-event-codes.h>
13 * Kevin-specific things
21 compatible = "google,kevin-rev15", "google,kevin-rev14",
22 "google,kevin-rev13", "google,kevin-rev12",
23 "google,kevin-rev11", "google,kevin-rev10",
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/linux-6.14.4/drivers/phy/broadcom/
Dphy-brcm-usb-init-synopsys.c1 // SPDX-License-Identifier: GPL-2.0
13 #include "phy-brcm-usb-init.h"
101 void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO]; in usb_mdio_write_7211b0()
103 addr &= 0x1f; /* 5-bit address */ in usb_mdio_write_7211b0()
105 while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) in usb_mdio_write_7211b0()
109 while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) in usb_mdio_write_7211b0()
112 while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) in usb_mdio_write_7211b0()
119 void __iomem *usb_mdio = params->regs[BRCM_REGS_USB_MDIO]; in usb_mdio_read_7211b0()
121 addr &= 0x1f; /* 5-bit address */ in usb_mdio_read_7211b0()
123 while (brcm_usb_readl(usb_mdio + USB_GMDIOCSR) & (1<<31)) in usb_mdio_read_7211b0()
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/linux-6.14.4/drivers/usb/core/
Dhub.c1 // SPDX-License-Identifier: GPL-2.0
71 /* Protect struct usb_device->state and ->children members
72 * Note: Both are also protected by ->dev.sem, except that ->state can
80 /* synchronize hub-port add/remove and peering operations */
90 * 10 seconds to send reply for the initial 64-byte descriptor request.
92 /* define initial 64-byte descriptor request timeout in milliseconds */
96 "initial 64-byte descriptor request timeout in milliseconds "
97 "(default 5000 - 5.0 seconds)");
141 if (hub_is_superspeedplus(hub->hdev)) in portspeed()
143 if (hub_is_superspeed(hub->hdev)) in portspeed()
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/linux-6.14.4/drivers/mmc/core/
Dsdio_bus.c1 // SPDX-License-Identifier: GPL-2.0-or-later
43 sdio_config_attr(class, "0x%02x\n", func->class);
44 sdio_config_attr(vendor, "0x%04x\n", func->vendor);
45 sdio_config_attr(device, "0x%04x\n", func->device);
46 sdio_config_attr(revision, "%u.%u\n", func->major_rev, func->minor_rev);
47 sdio_config_attr(modalias, "sdio:c%02Xv%04Xd%04X\n", func->class, func->vendor, func->device);
54 if (num > func->num_info) \
55 return -ENODATA; \
56 if (!func->info[num - 1][0]) \
58 return sysfs_emit(buf, "%s\n", func->info[num - 1]); \
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/linux-6.14.4/include/linux/regulator/
Ddriver.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * driver.h -- SoC Regulator driver support.
57 * struct regulator_ops - regulator operations.
70 * return -ENOTRECOVERABLE if regulator can't be read at
73 * regulator; return -ENOTRECOVERABLE if regulator can't
80 * @set_current_limit: Configure a limit for a current-limited regulator.
82 * @get_current_limit: Get the configured limit for a current-limited regulator.
89 * - REGULATOR_SEVERITY_PROT should automatically shut down the regulator(s).
91 * - REGULATOR_SEVERITY_ERR should indicate that over-current situation is
95 * - REGULATOR_SEVERITY_WARN should indicate situation where hardware is
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