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/linux/drivers/acpi/
H A Dpci_link.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * pci_link.c - ACPI PCI Interrupt Link Device Driver ($Revision: 34 $)
10 * 1. Support more than one IRQ resource entry per link device (index).
12 * for IRQ management (e.g. start()->_SRS).
28 #include <linux/irq.h>
36 static int acpi_pci_link_add(struct acpi_device *device,
38 static void acpi_pci_link_remove(struct acpi_device *device);
53 * later even the link is disable. Instead, we just repick the active irq
56 u32 active; /* Current IRQ */
68 struct acpi_device *device; member
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/linux/kernel/irq/
H A Ddevres.c1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/device.h>
7 #include <linux/irq.h>
12 * Device resource management aware IRQ request/free implementation.
15 unsigned int irq; member
19 static void devm_irq_release(struct device *dev, void *res) in devm_irq_release()
23 free_irq(this->irq, this->dev_id); in devm_irq_release()
26 static int devm_irq_match(struct device *dev, void *res, void *data) in devm_irq_match()
30 return this->irq == match->irq && this->dev_id == match->dev_id; in devm_irq_match()
33 static int devm_request_result(struct device *dev, int rc, unsigned int irq, in devm_request_result() argument
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/linux/drivers/pci/
H A Dirq.c1 // SPDX-License-Identifier: GPL-2.0
3 * PCI IRQ handling code
9 #include <linux/device.h>
19 * pci_request_irq - allocate an interrupt line for a PCI device
20 * @dev: PCI device to operate on
21 * @nr: device-relative interrupt vector index (0-based).
22 * @handler: Function to be called when the IRQ occurs.
26 * @thread_fn: Function called from the IRQ handler thread
27 * If NULL, no IRQ thread is created
29 * @fmt: Printf-like format string naming the handler
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/linux/drivers/pci/msi/
H A Dapi.c1 // SPDX-License-Identifier: GPL-2.0
3 * PCI MSI/MSI-X — Exported APIs for device drivers
5 * Copyright (C) 2003-2004 Intel
12 #include <linux/irq.h>
17 * pci_enable_msi() - Enable MSI interrupt mode on device
18 * @dev: the PCI device to operate on
20 * Legacy device driver API to enable MSI interrupts mode on device and
22 * Linux IRQ will be saved at @dev->irq. The driver must invoke
40 * pci_disable_msi() - Disable MSI interrupt mode on device
41 * @dev: the PCI device to operate on
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/linux/arch/x86/pci/
H A Dirq.c1 // SPDX-License-Identifier: GPL-2.0
3 * Low-Level PCI Support for PC -- Routing of Interrupts
5 * (c) 1999--2000 Martin Mares <mj@ucw.cz>
18 #include <linux/irq.h>
22 #include <asm/pc-conf-reg.h>
52 u16 vendor, device; member
57 int irq);
62 int (*probe)(struct irq_router *r, struct pci_dev *router, u16 device);
69 * Check passed address for the PCI IRQ Routing Table signature
81 if (rt->signature != PIRQ_SIGNATURE || in pirq_check_routing_table()
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/linux/sound/soc/sdca/
H A Dsdca_interrupts.c1 // SPDX-License-Identifier: GPL-2.0
7 * https://www.mipi.org/mipi-sdca-v1-0-download
13 #include <linux/device.h>
21 #include <sound/soc-component.h>
75 static irqreturn_t base_handler(int irq, void *data) in base_handler() argument
78 struct device *dev = interrupt->component->dev; in base_handler()
80 dev_info(dev, "%s irq without full handling\n", interrupt->name); in base_handler()
85 static irqreturn_t function_status_handler(int irq, void *data) in function_status_handler() argument
88 struct device *dev = interrupt->component->dev; in function_status_handler()
94 reg = SDW_SDCA_CTL(interrupt->function->desc->adr, interrupt->entity->id, in function_status_handler()
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/linux/drivers/base/
H A Dauxiliary_sysfs.c1 // SPDX-License-Identifier: GPL-2.0
29 guard(mutex)(&auxdev->sysfs.lock); in auxiliary_irq_dir_prepare()
30 if (auxdev->sysfs.irq_dir_exists) in auxiliary_irq_dir_prepare()
33 ret = devm_device_add_group(&auxdev->dev, &auxiliary_irqs_group); in auxiliary_irq_dir_prepare()
37 auxdev->sysfs.irq_dir_exists = true; in auxiliary_irq_dir_prepare()
38 xa_init(&auxdev->sysfs.irqs); in auxiliary_irq_dir_prepare()
43 * auxiliary_device_sysfs_irq_add - add a sysfs entry for the given IRQ
44 * @auxdev: auxiliary bus device to add the sysfs entry.
45 * @irq: The associated interrupt number.
47 * This function should be called after auxiliary device have successfully
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H A Dplatform.c1 // SPDX-License-Identifier: GPL-2.0
3 * platform.c - platform 'pseudo' bus for legacy devices
5 * Copyright (c) 2002-3 Patrick Mochel
6 * Copyright (c) 2002-3 Open Source Development Labs
8 * Please see Documentation/driver-api/driver-model/platform.rst for more
20 #include <linux/dma-mapping.h>
28 #include <linux/clk/clk-conf.h>
34 #include <linux/dma-map-ops.h>
39 /* For automatically allocated device IDs */
42 struct device platform_bus = {
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/linux/drivers/gpu/drm/amd/amdgpu/
H A Damdgpu_irq.c33 * passed to amdgpu IRQ handler which is responsible for detecting source and
41 * For GPU interrupt sources that may be driven by another driver, IRQ domain
45 #include <linux/irq.h>
118 * amdgpu_irq_disable_all - disable *all* interrupts
120 * @adev: amdgpu device pointer
130 spin_lock_irqsave(&adev->irq.lock, irqflags); in amdgpu_irq_disable_all()
132 if (!adev->irq.client[i].sources) in amdgpu_irq_disable_all()
136 struct amdgpu_irq_src *src = adev->irq.client[i].sources[j]; in amdgpu_irq_disable_all()
138 if (!src || !src->funcs->set || !src->num_types) in amdgpu_irq_disable_all()
141 for (k = 0; k < src->num_types; ++k) { in amdgpu_irq_disable_all()
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/linux/arch/alpha/kernel/
H A Dsmc37c669.c60 * er 28-Jan-1997 Initial Entry
67 ** Macros for handling device IRQs
69 ** The mask acts as a flag used in mapping actual ISA IRQs (0 - 15)
70 ** to device IRQs (A - H).
81 ** Macros for handling device DRQs
84 ** channels to device DMA channels (A - C).
97 ** SMC37c669 Device Function Definitions
107 ** Default Device Function Mappings
127 ** SMC 37c669 Device IRQs
139 ** SMC 37c669 Device DMA Channel Definitions
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H A Dsys_takara.c1 // SPDX-License-Identifier: GPL-2.0
21 #include <asm/irq.h>
34 static unsigned long cached_irq_mask[2] = { -1, -1 };
37 takara_update_irq_hw(unsigned long irq, unsigned long mask) in takara_update_irq_hw() argument
41 mask = (irq >= 64 ? mask << 16 : mask >> ((irq - 16) & 0x30)); in takara_update_irq_hw()
42 regaddr = 0x510 + (((irq - 16) >> 2) & 0x0c); in takara_update_irq_hw()
49 unsigned int irq = d->irq; in takara_enable_irq() local
51 mask = (cached_irq_mask[irq >= 64] &= ~(1UL << (irq & 63))); in takara_enable_irq()
52 takara_update_irq_hw(irq, mask); in takara_enable_irq()
58 unsigned int irq = d->irq; in takara_disable_irq() local
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/linux/drivers/gpu/drm/radeon/
H A Dradeon_irq_kms.c47 * radeon_driver_irq_handler_kms - irq handler for KMS
49 * This is the irq handler for the radeon KMS driver (all asics).
50 * radeon_irq_process is a macro that points to the per-asic
51 * irq handler callback.
53 static irqreturn_t radeon_driver_irq_handler_kms(int irq, void *arg) in radeon_driver_irq_handler_kms() argument
56 struct radeon_device *rdev = dev->dev_private; in radeon_driver_irq_handler_kms()
61 pm_runtime_mark_last_busy(dev->dev); in radeon_driver_irq_handler_kms()
69 * radeon_hotplug_work_func - display hotplug work handler
74 * The work gets scheduled from the irq handler if there
84 struct drm_mode_config *mode_config = &dev->mode_config; in radeon_hotplug_work_func()
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/linux/sound/drivers/mpu401/
H A Dmpu401.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Driver for generic MPU-401 boards (UART mode only)
18 MODULE_DESCRIPTION("MPU-401 UART");
21 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* exclude the first card */
25 static bool pnp[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
27 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT; /* MPU-401 port number */
28 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* MPU-401 IRQ */ variable
29 static bool uart_enter[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 1};
32 MODULE_PARM_DESC(index, "Index value for MPU-401 device.");
34 MODULE_PARM_DESC(id, "ID string for MPU-401 device.");
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/linux/Documentation/devicetree/bindings/interrupt-controller/
H A Dst,stih407-irq-syscfg.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/st,stih407-irq-syscfg.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Patrice Chotard <patrice.chotard@foss.st.com>
15 Configuration registers. This device is used to unmask them prior to use.
19 const: st,stih407-irq-syscfg
22 description: Phandle to Cortex-A9 IRQ system config registers
25 st,irq-device:
27 $ref: /schemas/types.yaml#/definitions/uint32-array
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/linux/include/linux/
H A Dinterrupt.h1 /* SPDX-License-Identifier: GPL-2.0 */
21 #include <asm/irq.h>
42 * irq handling routines.
44 * IRQF_SHARED - allow sharing the irq among several devices
45 * IRQF_PROBE_SHARED - set by callers when they expect sharing mismatches to occur
46 * IRQF_TIMER - Flag to mark this interrupt as timer interrupt
47 * IRQF_PERCPU - Interrupt is per cpu
48 * IRQF_NOBALANCING - Flag to exclude this interrupt from irq balancing
49 * IRQF_IRQPOLL - Interrupt is used for polling (only the interrupt that is
52 * IRQF_ONESHOT - Interrupt is not reenabled after the hardirq handler finished.
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/linux/arch/arm64/kvm/vgic/
H A Dvgic-its.c1 // SPDX-License-Identifier: GPL-2.0-only
17 #include <linux/irqchip/arm-gic-v3.h>
24 #include "vgic-mmio.h"
31 static int update_lpi_config(struct kvm *kvm, struct vgic_irq *irq,
36 int __sz = vgic_its_get_abi(i)->t##_esz; \
37 struct kvm *__k = (i)->dev->kvm; \
44 __ret = -EINVAL; \
53 int __sz = vgic_its_get_abi(i)->t##_esz; \
54 struct kvm *__k = (i)->dev->kvm; \
62 __ret = -EINVAL; \
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H A Dvgic-debug.c1 // SPDX-License-Identifier: GPL-2.0-only
37 struct vgic_dist *dist = &kvm->arch.vgic; in iter_next()
39 if (iter->dist_id == 0) { in iter_next()
40 iter->dist_id++; in iter_next()
46 * has exhausted the sequentially-allocated INTID space. in iter_next()
48 if (iter->intid >= (iter->nr_spis + VGIC_NR_PRIVATE_IRQS - 1) && in iter_next()
49 iter->nr_lpis) { in iter_next()
50 if (iter->lpi_idx < iter->nr_lpis) in iter_next()
51 xa_find_after(&dist->lpi_xa, &iter->intid, in iter_next()
54 iter->lpi_idx++; in iter_next()
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/linux/arch/mips/pci/
H A Dmsi-octeon.c6 * Copyright (C) 2005-2009, 2010 Cavium Networks
15 #include <asm/octeon/cvmx-npi-defs.h>
16 #include <asm/octeon/cvmx-pci-defs.h>
17 #include <asm/octeon/cvmx-npei-defs.h>
18 #include <asm/octeon/cvmx-sli-defs.h>
19 #include <asm/octeon/cvmx-pexp-defs.h>
20 #include <asm/octeon/pci-octeon.h>
29 * Each bit in msi_multiple_irq_bitmask tells that the device using
31 * is used so we can disable all of the MSI interrupts when a device
49 * arch_setup_msi_irq() - setup MSI IRQs for a device
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/linux/drivers/iio/
H A Dindustrialio-trigger.c1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/device.h>
17 #include <linux/iio/iio-opaque.h>
23 /* RFC - Question of approach
41 * name_show() - retrieve useful identifying name
42 * @dev: device associated with the iio_trigger
50 static ssize_t name_show(struct device *dev, struct device_attribute *attr, in name_show()
55 return sysfs_emit(buf, "%s\n", trig->name); in name_show()
72 trig_info->id = ida_alloc(&iio_trigger_ida, GFP_KERNEL); in iio_trigger_register()
73 if (trig_info->id < 0) in iio_trigger_register()
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/linux/Documentation/admin-guide/
H A Dparport.rst4 The ``parport`` code provides parallel-port support under Linux. This
5 includes the ability to share one port between multiple device
12 because there are a lot of people using the same IRQ for their
16 port-sharing) and architecture-dependent (which deals with actually
28 architecture-dependent code with (for example)::
30 # insmod parport_pc io=0x3bc,0x378,0x278 irq=none,7,auto
32 to tell the ``parport`` code that you want three PC-style ports, one at
33 0x3bc with no IRQ, one at 0x378 using IRQ 7, and one at 0x278 with an
34 auto-detected IRQ. Currently, PC-style (``parport_pc``), Sun ``bpp``,
43 --------
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/linux/drivers/input/misc/
H A Dpalmas-pwrbutton.c1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 2012-2014 Texas Instruments Incorporated - http://www.ti.com/
26 * struct palmas_pwron - Palmas power on data
27 * @palmas: pointer to palmas device
28 * @input_dev: pointer to input device
30 * @irq: irq that we are hooked on to
36 int irq; member
40 * struct palmas_pwron_config - configuration of palmas power on
50 * palmas_power_button_work() - Detects the button release event
58 struct input_dev *input_dev = pwron->input_dev; in palmas_power_button_work()
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/linux/Documentation/power/
H A Dsuspend-and-interrupts.rst2 System Suspend and Device Interrupts
9 Suspending and Resuming Device IRQs
10 -----------------------------------
12 Device interrupt request lines (IRQs) are generally disabled during system
14 ->prepare, ->suspend and ->suspend_late callbacks have been executed for all
17 The rationale for doing so is that after the "late" phase of device suspend
21 interrupt handlers for shared IRQs that device drivers implementing them were
26 of suspend_device_irqs(), along with the "noirq" phase of device suspend and
29 Device IRQs are re-enabled during system resume, right before the "early" phase
30 of resuming devices (that is, before starting to execute ->resume_early
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/linux/drivers/input/serio/
H A Dxilinx_ps2.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Xilinx XPS PS/2 device driver
24 /* Register offsets for the xps2 device */
66 int irq; member
71 struct device *dev;
79 * xps2_recv() - attempts to receive a byte from the PS/2 port.
80 * @drvdata: pointer to ps2 device private data structure
89 int status = -1; in xps2_recv()
92 sr = in_be32(drvdata->base_address + XPS2_STATUS_OFFSET); in xps2_recv()
94 *byte = in_be32(drvdata->base_address + XPS2_RX_DATA_OFFSET); in xps2_recv()
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/linux/Documentation/PCI/
H A Dpci.rst1 .. SPDX-License-Identifier: GPL-2.0
7 :Authors: - Martin Mares <mj@ucw.cz>
8 - Grant Grundler <grundler@parisc-linux.org>
11 Since each CPU architecture implements different chip-sets and PCI devices
15 PCI device drivers.
17 A more complete resource is the third edition of "Linux Device Drivers"
18 by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman.
26 "Linux PCI" <linux-pci@atrey.karlin.mff.cuni.cz> mailing list.
33 a new device, the driver with a matching "description" will be notified.
38 supporting hot-pluggable PCI, CardBus, and Express-Card in a single driver].
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/linux/drivers/parisc/
H A Dsuperio.c1 // SPDX-License-Identifier: GPL-2.0-or-later
14 * (C) Copyright 2003 Grant Grundler <grundler parisc-linux org>
15 * (C) Copyright 2005 Kyle McMartin <kyle@parisc-linux.org>
23 * works with serial. -- John Marvin <jsm@fc.hp.com>
26 * -- Kyle McMartin <kyle@parisc-linux.org>
51 * a physical device connected.
106 * Bits 6-3: zero in superio_interrupt()
107 * Bits 2-0: highest priority, active requesting interrupt ID (0-7) in superio_interrupt()
110 /* I suspect "spurious" interrupts are from unmasking an IRQ. in superio_interrupt()
112 * just call the handler for that IRQ as if it were pending. in superio_interrupt()
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