1 // SPDX-License-Identifier: GPL-2.0
3  * Copyright (C) 1992, 1998-2004 Linus Torvalds, Ingo Molnar
24  *	probe_irq_on	- begin an interrupt autodetect
46 		raw_spin_lock_irq(&desc->lock);  in probe_irq_on()
47 		if (!desc->action && irq_settings_can_probe(desc)) {  in probe_irq_on()
52 			if (desc->irq_data.chip->irq_set_type)  in probe_irq_on()
53 				desc->irq_data.chip->irq_set_type(&desc->irq_data,  in probe_irq_on()
57 		raw_spin_unlock_irq(&desc->lock);  in probe_irq_on()
69 		raw_spin_lock_irq(&desc->lock);  in probe_irq_on()
70 		if (!desc->action && irq_settings_can_probe(desc)) {  in probe_irq_on()
71 			desc->istate |= IRQS_AUTODETECT | IRQS_WAITING;  in probe_irq_on()
73 				desc->istate |= IRQS_PENDING;  in probe_irq_on()
75 		raw_spin_unlock_irq(&desc->lock);  in probe_irq_on()
87 		raw_spin_lock_irq(&desc->lock);  in probe_irq_on()
89 		if (desc->istate & IRQS_AUTODETECT) {  in probe_irq_on()
90 			/* It triggered already - consider it spurious. */  in probe_irq_on()
91 			if (!(desc->istate & IRQS_WAITING)) {  in probe_irq_on()
92 				desc->istate &= ~IRQS_AUTODETECT;  in probe_irq_on()
98 		raw_spin_unlock_irq(&desc->lock);  in probe_irq_on()
106  *	probe_irq_mask - scan a bitmap of interrupt lines
114  *	only return autodetect irq numbers - just so that we reset
124 		raw_spin_lock_irq(&desc->lock);  in probe_irq_mask()
125 		if (desc->istate & IRQS_AUTODETECT) {  in probe_irq_mask()
126 			if (i < 16 && !(desc->istate & IRQS_WAITING))  in probe_irq_mask()
129 			desc->istate &= ~IRQS_AUTODETECT;  in probe_irq_mask()
132 		raw_spin_unlock_irq(&desc->lock);  in probe_irq_mask()
141  *	probe_irq_off	- end an interrupt autodetect
154  *	nothing prevents two IRQ probe callers from overlapping. The
155  *	results of this are non-optimal.
163 		raw_spin_lock_irq(&desc->lock);  in probe_irq_off()
165 		if (desc->istate & IRQS_AUTODETECT) {  in probe_irq_off()
166 			if (!(desc->istate & IRQS_WAITING)) {  in probe_irq_off()
171 			desc->istate &= ~IRQS_AUTODETECT;  in probe_irq_off()
174 		raw_spin_unlock_irq(&desc->lock);  in probe_irq_off()
179 		irq_found = -irq_found;  in probe_irq_off()