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/Linux-v6.6/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-v6.6/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-v6.6/include/linux/
Dpm_runtime.h1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * pm_runtime.h - Device run-time power management helper functions.
76 extern int pm_schedule_suspend(struct device *dev, unsigned int delay);
86 extern void pm_runtime_set_autosuspend_delay(struct device *dev, int delay);
98 * pm_runtime_get_if_in_use - Conditionally bump up runtime PM usage counter.
110 * pm_suspend_ignore_children - Set runtime PM behavior regarding children.
120 dev->power.ignore_children = enable; in pm_suspend_ignore_children()
124 * pm_runtime_get_noresume - Bump up runtime PM usage counter of a device.
129 atomic_inc(&dev->power.usage_count); in pm_runtime_get_noresume()
133 * pm_runtime_put_noidle - Drop runtime PM usage counter of a device.
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/Linux-v6.6/drivers/gpu/drm/i915/
DKconfig.profile28 int "Runtime autosuspend delay for userspace GGTT mmaps (ms)"
35 that complements the runtime-pm autosuspend and provides a lower
36 floor on the autosuspend delay.
38 May be 0 to disable the extra delay and solely use the device level
39 runtime pm autosuspend delay tunable.
46 check the health of the GPU and undertake regular house-keeping of
98 take a non-negligible time to setup, we do a short spin first to
Dintel_wakeref.h2 * SPDX-License-Identifier: MIT
71 * the runtime pm wakeref and then call the intel_wakeref_ops->get()
74 * Note that intel_wakeref_ops->get() is allowed to fail, in which case
75 * the runtime-pm wakeref will be released and the acquisition unwound,
85 if (unlikely(!atomic_inc_not_zero(&wf->count))) in intel_wakeref_get()
103 INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0); in __intel_wakeref_get()
104 atomic_inc(&wf->count); in __intel_wakeref_get()
119 return atomic_inc_not_zero(&wf->count); in intel_wakeref_get_if_active()
130 might_lock(&wf->mutex); in intel_wakeref_might_get()
139 * the runtime pm wakeref will be released after the intel_wakeref_ops->put()
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Dintel_runtime_pm.h1 /* SPDX-License-Identifier: MIT */
29 * Our driver uses the autosuspend delay feature, which means we'll only really
44 struct device *kdev; /* points to i915->drm.dev */
69 /* Manual runtime pm autosuspend delay for user GGTT/lmem mmaps */
96 #define INTEL_RPM_RAW_WAKEREF_MASK (INTEL_RPM_WAKELOCK_BIAS - 1)
113 WARN_ONCE(rpm->suspended, in assert_rpm_device_not_suspended()
122 "RPM raw-wakeref not held\n"); in __assert_rpm_raw_wakeref_held()
136 __assert_rpm_raw_wakeref_held(rpm, atomic_read(&rpm->wakeref_count)); in assert_rpm_raw_wakeref_held()
142 __assert_rpm_wakelock_held(rpm, atomic_read(&rpm->wakeref_count)); in assert_rpm_wakelock_held()
146 * disable_rpm_wakeref_asserts - disable the RPM assert checks
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/Linux-v6.6/Documentation/devicetree/bindings/net/nfc/
Dti,trf7970a.yaml1 # 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>
11 - Mark Greer <mgreer@animalcreek.com>
17 autosuspend-delay:
20 Specify autosuspend delay in milliseconds.
22 clock-frequency:
27 en2-rf-quirk:
35 irq-status-read-quirk:
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/Linux-v6.6/Documentation/devicetree/bindings/media/
Dgpio-ir-receiver.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/media/gpio-ir-receiver.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
13 - $ref: rc.yaml#
17 const: gpio-ir-receiver
22 linux,autosuspend-period:
23 description: autosuspend delay time in milliseconds
26 wakeup-source:
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/Linux-v6.6/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
57 /* Protect struct usb_device->state and ->children members
58 * Note: Both are also protected by ->dev.sem, except that ->state can
66 /* synchronize hub-port add/remove and peering operations */
76 * 10 seconds to send reply for the initial 64-byte descriptor request.
78 /* define initial 64-byte descriptor request timeout in milliseconds */
82 "initial 64-byte descriptor request timeout in milliseconds "
83 "(default 5000 - 5.0 seconds)");
128 if (hub_is_superspeedplus(hub->hdev)) in portspeed()
130 if (hub_is_superspeed(hub->hdev)) in portspeed()
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/Linux-v6.6/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-v6.6/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-v6.6/block/
Dblk-pm.c1 // SPDX-License-Identifier: GPL-2.0
3 #include <linux/blk-pm.h>
6 #include "blk-mq.h"
9 * blk_pm_runtime_init - Block layer runtime PM initialization routine
14 * Initialize runtime-PM-related fields for @q and start auto suspend for
15 * @dev. Drivers that want to take advantage of request-based runtime PM
22 * the autosuspend delay is set to -1 to make runtime suspend impossible
24 * not need to touch other autosuspend settings.
31 q->dev = dev; in blk_pm_runtime_init()
32 q->rpm_status = RPM_ACTIVE; in blk_pm_runtime_init()
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/Linux-v6.6/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-v6.6/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-v6.6/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#
14 - $ref: /schemas/arm/primecell.yaml#
23 - compatible
28 - const: arm,pl022
29 - const: arm,primecell
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/Linux-v6.6/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
31 #include <linux/delay.h>
36 #include <linux/mfd/sun4i-gpadc.h>
58 .temp_offset = -1932,
67 .temp_offset = -1447,
76 .temp_offset = -1623,
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/Linux-v6.6/sound/usb/
Dusbaudio.h1 /* SPDX-License-Identifier: GPL-2.0-or-later */
10 /* handling of USB vendor/product ID pairs as 32-bit numbers */
47 struct list_head ep_list; /* list of audio-related endpoints */
68 #define USB_AUDIO_IFACE_UNUSED ((void *)-1L)
71 dev_err(&(chip)->dev->dev, fmt, ##args)
73 dev_err_ratelimited(&(chip)->dev->dev, fmt, ##args)
75 dev_warn(&(chip)->dev->dev, fmt, ##args)
77 dev_info(&(chip)->dev->dev, fmt, ##args)
79 dev_dbg(&(chip)->dev->dev, fmt, ##args)
86 #define QUIRK_NODEV_INTERFACE -3 /* return -ENODEV */
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/Linux-v6.6/arch/arm/boot/dts/nxp/imx/
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";
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/Linux-v6.6/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-v6.6/drivers/gpu/drm/panel/
Dpanel-samsung-atna33xc20.c1 // SPDX-License-Identifier: GPL-2.0
6 * by the DRM_PANEL_SIMPLE driver because its power sequencing is non-standard.
10 #include <linux/delay.h>
72 if (p->el3_was_on) in atana33xc20_suspend()
73 atana33xc20_wait(p->el_on3_off_time, 150); in atana33xc20_suspend()
75 ret = regulator_disable(p->supply); in atana33xc20_suspend()
78 p->powered_off_time = ktime_get_boottime(); in atana33xc20_suspend()
79 p->el3_was_on = false; in atana33xc20_suspend()
91 atana33xc20_wait(p->powered_off_time, 500); in atana33xc20_resume()
93 ret = regulator_enable(p->supply); in atana33xc20_resume()
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/Linux-v6.6/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-v6.6/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-v6.6/drivers/iio/pressure/
Dmpl115.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * mpl115.c - Support for Freescale MPL115A pressure/temperature sensor
12 #include <linux/delay.h>
37 int ret = data->ops->write(data->dev, MPL115_CONVERT, 0); in mpl115_request()
54 mutex_lock(&data->lock); in mpl115_comp_pressure()
59 ret = data->ops->read(data->dev, MPL115_PADC); in mpl115_comp_pressure()
64 ret = data->ops->read(data->dev, MPL115_TADC); in mpl115_comp_pressure()
70 a1 = data->b1 + ((data->c12 * tadc) >> 11); in mpl115_comp_pressure()
71 y1 = (data->a0 << 10) + a1 * padc; in mpl115_comp_pressure()
74 pcomp = (y1 + ((data->b2 * (int) tadc) >> 1)) >> 9; in mpl115_comp_pressure()
[all …]
/Linux-v6.6/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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