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/linux-5.10/Documentation/driver-api/usb/
Dpower-management.rst1 .. _usb-power-management:
7 :Date: Last-updated: February 2014
11 ---------
17 * Changing the default idle-delay time
20 * The driver interface for autosuspend and autoresume
31 -------------------------
35 component is ``suspended`` it is in a nonfunctional low-power state; it
37 ``resumed`` (returned to a functional full-power state) when the kernel
67 ----------------------
85 --------------------------
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/linux-5.10/Documentation/power/
Druntime_pm.rst5 (C) 2009-2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
18 put their PM-related work items. It is strongly recommended that pm_wq be
20 them to be synchronized with system-wide power transitions (suspend to RAM,
53 The ->runtime_suspend(), ->runtime_resume() and ->runtime_idle() callbacks
57 1. PM domain of the device, if the device's PM domain object, dev->pm_domain,
60 2. Device type of the device, if both dev->type and dev->type->pm are present.
62 3. Device class of the device, if both dev->class and dev->class->pm are
65 4. Bus type of the device, if both dev->bus and dev->bus->pm are present.
69 dev->driver->pm directly (if present).
73 and bus type. Moreover, the high-priority one will always take precedence over
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/linux-5.10/drivers/gpu/drm/i915/
DKconfig.profile14 int "Runtime autosuspend delay for userspace GGTT mmaps (ms)"
21 that complements the runtime-pm autosuspend and provides a lower
22 floor on the autosuspend delay.
24 May be 0 to disable the extra delay and solely use the device level
25 runtime pm autosuspend delay tunable.
32 check the health of the GPU and undertake regular house-keeping of
66 take a non-negligible time to setup, we do a short spin first to
Dintel_wakeref.h2 * SPDX-License-Identifier: MIT
74 * Note that @fn is allowed to fail, in which case the runtime-pm wakeref
84 if (unlikely(!atomic_inc_not_zero(&wf->count))) in intel_wakeref_get()
102 INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0); in __intel_wakeref_get()
103 atomic_inc(&wf->count); in __intel_wakeref_get()
118 return atomic_inc_not_zero(&wf->count); in intel_wakeref_get_if_active()
135 * Note that @fn is allowed to fail, in which case the runtime-pm wakeref
145 GENMASK(BITS_PER_LONG - 1, __INTEL_WAKEREF_PUT_LAST_BIT__) in __intel_wakeref_put()
147 INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0); in __intel_wakeref_put()
148 if (unlikely(!atomic_add_unless(&wf->count, -1, 1))) in __intel_wakeref_put()
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Dintel_runtime_pm.h1 /* SPDX-License-Identifier: MIT */
37 * Our driver uses the autosuspend delay feature, which means we'll only really
52 struct device *kdev; /* points to i915->drm.pdev->dev */
81 #define INTEL_RPM_RAW_WAKEREF_MASK (INTEL_RPM_WAKELOCK_BIAS - 1)
98 WARN_ONCE(rpm->suspended, in assert_rpm_device_not_suspended()
107 "RPM raw-wakeref not held\n"); in __assert_rpm_raw_wakeref_held()
121 __assert_rpm_raw_wakeref_held(rpm, atomic_read(&rpm->wakeref_count)); in assert_rpm_raw_wakeref_held()
127 __assert_rpm_wakelock_held(rpm, atomic_read(&rpm->wakeref_count)); in assert_rpm_wakelock_held()
131 * disable_rpm_wakeref_asserts - disable the RPM assert checks
135 * reference, while keeping the device-not-suspended checks still enabled.
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/linux-5.10/Documentation/devicetree/bindings/net/nfc/
Dtrf7970a.txt4 - compatible: Should be "ti,trf7970a".
5 - spi-max-frequency: Maximum SPI frequency (<= 2000000).
6 - interrupts: A single interrupt specifier.
7 - ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' pins on the
9 - vin-supply: Regulator for supply voltage to VIN pin
12 - pinctrl-names: Contains only one value - "default".
13 - pintctrl-0: Specifies the pin control groups used for this controller.
14 - autosuspend-delay: Specify autosuspend delay in milliseconds.
15 - irq-status-read-quirk: Specify that the trf7970a being used has the
17 - en2-rf-quirk: Specify that the trf7970a being used has the "EN2 RF"
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/linux-5.10/include/linux/
Dpm_runtime.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * pm_runtime.h - Device run-time power management helper functions.
42 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
52 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
63 * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
75 * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
85 dev->power.ignore_children = enable; in pm_suspend_ignore_children()
89 * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
94 atomic_inc(&dev->power.usage_count); in pm_runtime_get_noresume()
98 * pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
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/linux-5.10/Documentation/devicetree/bindings/media/
Dgpio-ir-receiver.txt1 Device-Tree bindings for GPIO IR receiver
4 - compatible: should be "gpio-ir-receiver".
5 - gpios: specifies GPIO used for IR signal reception.
8 - linux,rc-map-name: see rc.txt file in the same
10 - linux,autosuspend-period: autosuspend delay time,
15 ir: ir-receiver {
16 compatible = "gpio-ir-receiver";
18 linux,rc-map-name = "rc-rc6-mce";
19 linux,autosuspend-period = <125>;
/linux-5.10/drivers/usb/core/
DKconfig1 # SPDX-License-Identifier: GPL-2.0
30 Documentation/driver-api/usb/persist.rst for more info.
45 Say N here unless you require new-device enumeration failure to
64 "Dual-Role" device, which can act as either a device
69 Select this only if your board has Mini-AB/Micro-AB
97 Implements OTG Finite State Machine as specified in On-The-Go
109 int "Default autosuspend delay"
113 The default autosuspend delay in seconds. Can be overridden
114 with the usbcore.autosuspend command line or module parameter.
117 this value if you want a different delay and cannot modify
Dhub.c1 // SPDX-License-Identifier: GPL-2.0
49 /* Protect struct usb_device->state and ->children members
50 * Note: Both are also protected by ->dev.sem, except that ->state can
58 /* synchronize hub-port add/remove and peering operations */
68 * 10 seconds to send reply for the initial 64-byte descriptor request.
70 /* define initial 64-byte descriptor request timeout in milliseconds */
74 "initial 64-byte descriptor request timeout in milliseconds "
75 "(default 5000 - 5.0 seconds)");
120 if (hub_is_superspeedplus(hub->hdev)) in portspeed()
122 if (hub_is_superspeed(hub->hdev)) in portspeed()
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Dusb.c1 // SPDX-License-Identifier: GPL-2.0
6 * (C) Copyright Johannes Erdfelt 1999-2001
11 * (C) Copyright David Brownell 2000-2004
14 * (C) Copyright Greg Kroah-Hartman 2002-2003
46 #include <linux/dma-mapping.h>
66 /* Default delay value, in seconds */
68 module_param_named(autosuspend, usb_autosuspend_delay, int, 0644);
69 MODULE_PARM_DESC(autosuspend, "default autosuspend delay");
119 * usb_find_common_endpoints() -- look up common endpoint descriptors
126 * Search the alternate setting's endpoint descriptors for the first bulk-in,
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/linux-5.10/Documentation/ABI/stable/
Dsysfs-bus-usb8 not the "USB-Persist" facility is enabled for the device. For
12 For more information, see Documentation/driver-api/usb/persist.rst.
14 What: /sys/bus/usb/devices/.../power/autosuspend
20 power/autosuspend. This file holds the time (in seconds)
27 The autosuspend delay for newly-created devices is set to
28 the value of the usbcore.autosuspend module parameter.
37 connected to the machine. This file is read-only.
49 active, i.e. not in a suspended state. This file is read-only.
63 What: /sys/bus/usb/devices/<busnum>-<port[.port]>...:<config num>-<interface num>/supports_autosus…
69 for this interface supports autosuspend. It also
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/linux-5.10/drivers/base/power/
Druntime.c1 // SPDX-License-Identifier: GPL-2.0
3 * drivers/base/power/runtime.c - Helper functions for device runtime PM
26 if (dev->pm_domain) in __rpm_get_callback()
27 ops = &dev->pm_domain->ops; in __rpm_get_callback()
28 else if (dev->type && dev->type->pm) in __rpm_get_callback()
29 ops = dev->type->pm; in __rpm_get_callback()
30 else if (dev->class && dev->class->pm) in __rpm_get_callback()
31 ops = dev->class->pm; in __rpm_get_callback()
32 else if (dev->bus && dev->bus->pm) in __rpm_get_callback()
33 ops = dev->bus->pm; in __rpm_get_callback()
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/linux-5.10/Documentation/devicetree/bindings/remoteproc/
Dti,omap-remoteproc.yaml1 # SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/remoteproc/ti,omap-remoteproc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Suman Anna <s-anna@ti.com>
13 The OMAP family of SoCs usually have one or more slave processor sub-systems
14 that are used to offload some of the processor-intensive tasks, or to manage
17 The processor cores in the sub-system are usually behind an IOMMU, and may
18 contain additional sub-modules like Internal RAM and/or ROMs, L1 and/or L2
21 The OMAP SoCs usually have a DSP processor sub-system and/or an IPU processor
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/linux-5.10/block/
Dblk-pm.c1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/blk-mq.h>
4 #include <linux/blk-pm.h>
7 #include "blk-mq.h"
8 #include "blk-mq-tag.h"
11 * blk_pm_runtime_init - Block layer runtime PM initialization routine
16 * Initialize runtime-PM-related fields for @q and start auto suspend for
17 * @dev. Drivers that want to take advantage of request-based runtime PM
24 * the autosuspend delay is set to -1 to make runtime suspend impossible
26 * not need to touch other autosuspend settings.
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/linux-5.10/Documentation/ABI/testing/
Dsysfs-devices-power40 space to control the run-time power management of the device.
61 with the main suspend/resume thread) during system-wide power
86 attribute is read-only. If the device is not capable to wake up
98 is read-only. If the device is not capable to wake up the
110 state in progress. This attribute is read-only. If the device
122 read-only. If the device is not capable to wake up the system
133 the device is being processed (1). This attribute is read-only.
145 device, in milliseconds. This attribute is read-only. If the
156 with the device, in milliseconds. This attribute is read-only.
169 milliseconds. This attribute is read-only. If the device is
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/linux-5.10/Documentation/devicetree/bindings/spi/
Dspi-pl022.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/spi/spi-pl022.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Linus Walleij <linus.walleij@linaro.org>
13 - $ref: "spi-controller.yaml#"
22 - compatible
27 - const: arm,pl022
28 - const: arm,primecell
39 clock-names:
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/linux-5.10/drivers/iio/adc/
Dsun4i-gpadc-iio.c1 // SPDX-License-Identifier: GPL-2.0
4 * Copyright (c) 2016 Quentin Schulz <quentin.schulz@free-electrons.com>
15 * This is also the reason of using autosuspend in pm_runtime. If there was no
16 * autosuspend, the thermal sensor would need X seconds after every
17 * pm_runtime_get_sync to get a value from the ADC. The autosuspend allows the
32 #include <linux/delay.h>
37 #include <linux/mfd/sun4i-gpadc.h>
59 .temp_offset = -1932,
68 .temp_offset = -1447,
77 .temp_offset = -1623,
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/linux-5.10/drivers/media/rc/
Dgpio-ir-recv.c1 // SPDX-License-Identifier: GPL-2.0-only
17 #include <media/rc-core.h>
33 struct device *pmdev = gpio_dev->pmdev; in gpio_ir_recv_irq()
39 * this may introduce a millisecond delay to call resume callback, in gpio_ir_recv_irq()
43 * respond to interrupt, another is delay introduced by async api. in gpio_ir_recv_irq()
48 val = gpiod_get_value(gpio_dev->gpiod); in gpio_ir_recv_irq()
50 ir_raw_event_store_edge(gpio_dev->rcdev, val == 1); in gpio_ir_recv_irq()
62 struct device *dev = &pdev->dev; in gpio_ir_recv_probe()
63 struct device_node *np = dev->of_node; in gpio_ir_recv_probe()
70 return -ENODEV; in gpio_ir_recv_probe()
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/linux-5.10/arch/arm/boot/dts/
Dimx6dl-prtrvt.dts1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
6 /dts-v1/;
8 #include "imx6qdl-prti6q.dtsi"
9 #include <dt-bindings/leds/common.h>
21 compatible = "gpio-leds";
22 pinctrl-names = "default";
23 pinctrl-0 = <&pinctrl_leds>;
25 led-debug0 {
28 linux,default-trigger = "heartbeat";
34 pinctrl-names = "default";
[all …]
/linux-5.10/drivers/iio/accel/
Dkxsd9.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * Copyright (c) 2008-2009 Jonathan Cameron <jic23@kernel.org>
21 #include <linux/delay.h>
60 #define KXSD9_CTRL_B_ST BIT(5) /* Self-test */
65 * struct kxsd9_state - device related storage
88 #define KXSD9_ZERO_G_OFFSET -2048
108 return -EINVAL; in kxsd9_write_scale()
110 ret = regmap_update_bits(st->map, in kxsd9_write_scale()
118 st->scale = i; in kxsd9_write_scale()
141 int ret = -EINVAL; in kxsd9_write_raw()
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/linux-5.10/drivers/char/hw_random/
Dmtk-rng.c1 // SPDX-License-Identifier: GPL-2.0-or-later
10 #include <linux/delay.h>
21 /* Runtime PM autosuspend timeout: */
47 err = clk_prepare_enable(priv->clk); in mtk_rng_init()
51 val = readl(priv->base + RNG_CTRL); in mtk_rng_init()
53 writel(val, priv->base + RNG_CTRL); in mtk_rng_init()
63 val = readl(priv->base + RNG_CTRL); in mtk_rng_cleanup()
65 writel(val, priv->base + RNG_CTRL); in mtk_rng_cleanup()
67 clk_disable_unprepare(priv->clk); in mtk_rng_cleanup()
75 ready = readl(priv->base + RNG_CTRL) & RNG_READY; in mtk_rng_wait_ready()
[all …]
/linux-5.10/drivers/net/wimax/i2400m/
Dusb.c1 // SPDX-License-Identifier: GPL-2.0-only
6 * Copyright (C) 2007-2008 Intel Corporation <linux-wimax@intel.com>
7 * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
10 * See i2400m-usb.h for a general description of this driver.
13 * generic driver to implement the bus-specific functions (device
51 #include "i2400m-usb.h"
59 #include "usb-debug-levels.h"
65 "String of space-separated NAME:VALUE pairs, where NAMEs "
71 #define I2400MU_FW_FILE_NAME_v1_5 "i2400m-fw-usb-1.5.sbcf"
73 #define I2400MU_FW_FILE_NAME_v1_4 "i2400m-fw-usb-1.4.sbcf"
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/linux-5.10/drivers/iio/light/
Dbh1780.c1 // SPDX-License-Identifier: GPL-2.0-only
14 #include <linux/delay.h>
45 int ret = i2c_smbus_write_byte_data(bh1780->client, in bh1780_write()
49 dev_err(&bh1780->client->dev, in bh1780_write()
58 int ret = i2c_smbus_read_byte_data(bh1780->client, in bh1780_read()
61 dev_err(&bh1780->client->dev, in bh1780_read()
70 int ret = i2c_smbus_read_word_data(bh1780->client, in bh1780_read_word()
73 dev_err(&bh1780->client->dev, in bh1780_read_word()
108 switch (chan->type) { in bh1780_read_raw()
110 pm_runtime_get_sync(&bh1780->client->dev); in bh1780_read_raw()
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/linux-5.10/drivers/misc/mei/
Dclient.c1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (c) 2003-2020, Intel Corporation. All rights reserved.
9 #include <linux/delay.h>
20 * mei_me_cl_init - initialize me client
26 INIT_LIST_HEAD(&me_cl->list); in mei_me_cl_init()
27 kref_init(&me_cl->refcnt); in mei_me_cl_init()
31 * mei_me_cl_get - increases me client refcount
35 * Locking: called under "dev->device_lock" lock
41 if (me_cl && kref_get_unless_zero(&me_cl->refcnt)) in mei_me_cl_get()
48 * mei_me_cl_release - free me client
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