1 // SPDX-License-Identifier: GPL-2.0-only
3  * Texas Instruments Keystone IRQ controller IP driver
10 #include <linux/irq.h>
24 #define KEYSTONE_N_IRQ		(32 - BIT_OFS)
30 	int			 irq;  member
42 	ret = regmap_read(kirq->devctrl_regs, kirq->devctrl_offset, &val);  in keystone_irq_readl()
44 		dev_dbg(kirq->dev, "irq read failed ret(%d)\n", ret);  in keystone_irq_readl()
53 	ret = regmap_write(kirq->devctrl_regs, kirq->devctrl_offset, value);  in keystone_irq_writel()
55 		dev_dbg(kirq->dev, "irq write failed ret(%d)\n", ret);  in keystone_irq_writel()
62 	kirq->mask |= BIT(d->hwirq);  in keystone_irq_setmask()
63 	dev_dbg(kirq->dev, "mask %lu [%x]\n", d->hwirq, kirq->mask);  in keystone_irq_setmask()
70 	kirq->mask &= ~BIT(d->hwirq);  in keystone_irq_unmask()
71 	dev_dbg(kirq->dev, "unmask %lu [%x]\n", d->hwirq, kirq->mask);  in keystone_irq_unmask()
79 static irqreturn_t keystone_irq_handler(int irq, void *keystone_irq)  in keystone_irq_handler()  argument
86 	dev_dbg(kirq->dev, "start irq %d\n", irq);  in keystone_irq_handler()
91 	dev_dbg(kirq->dev, "pending 0x%lx, mask 0x%x\n", pending, kirq->mask);  in keystone_irq_handler()
93 	pending = (pending >> BIT_OFS) & ~kirq->mask;  in keystone_irq_handler()
95 	dev_dbg(kirq->dev, "pending after mask 0x%lx\n", pending);  in keystone_irq_handler()
99 			raw_spin_lock_irqsave(&kirq->wa_lock, wa_lock_flags);  in keystone_irq_handler()
100 			err = generic_handle_domain_irq(kirq->irqd, src);  in keystone_irq_handler()
101 			raw_spin_unlock_irqrestore(&kirq->wa_lock,  in keystone_irq_handler()
105 				dev_warn_ratelimited(kirq->dev, "spurious irq detected hwirq %d\n",  in keystone_irq_handler()
110 	dev_dbg(kirq->dev, "end irq %d\n", irq);  in keystone_irq_handler()
117 	struct keystone_irq_device *kirq = h->host_data;  in keystone_irq_map()
120 	irq_set_chip_and_handler(virq, &kirq->chip, handle_level_irq);  in keystone_irq_map()
132 	struct device *dev = &pdev->dev;  in keystone_irq_probe()
133 	struct device_node *np = dev->of_node;  in keystone_irq_probe()
138 		return -EINVAL;  in keystone_irq_probe()
142 		return -ENOMEM;  in keystone_irq_probe()
144 	kirq->devctrl_regs = syscon_regmap_lookup_by_phandle_args(np, "ti,syscon-dev",  in keystone_irq_probe()
145 								  1, &kirq->devctrl_offset);  in keystone_irq_probe()
146 	if (IS_ERR(kirq->devctrl_regs))  in keystone_irq_probe()
147 		return PTR_ERR(kirq->devctrl_regs);  in keystone_irq_probe()
149 	kirq->irq = platform_get_irq(pdev, 0);  in keystone_irq_probe()
150 	if (kirq->irq < 0)  in keystone_irq_probe()
151 		return kirq->irq;  in keystone_irq_probe()
153 	kirq->dev = dev;  in keystone_irq_probe()
154 	kirq->mask = ~0x0;  in keystone_irq_probe()
155 	kirq->chip.name		= "keystone-irq";  in keystone_irq_probe()
156 	kirq->chip.irq_ack	= keystone_irq_ack;  in keystone_irq_probe()
157 	kirq->chip.irq_mask	= keystone_irq_setmask;  in keystone_irq_probe()
158 	kirq->chip.irq_unmask	= keystone_irq_unmask;  in keystone_irq_probe()
160 	kirq->irqd = irq_domain_create_linear(dev_fwnode(dev), KEYSTONE_N_IRQ, &keystone_irq_ops,  in keystone_irq_probe()
162 	if (!kirq->irqd) {  in keystone_irq_probe()
163 		dev_err(dev, "IRQ domain registration failed\n");  in keystone_irq_probe()
164 		return -ENODEV;  in keystone_irq_probe()
167 	raw_spin_lock_init(&kirq->wa_lock);  in keystone_irq_probe()
171 	ret = request_irq(kirq->irq, keystone_irq_handler,  in keystone_irq_probe()
174 		irq_domain_remove(kirq->irqd);  in keystone_irq_probe()
191 	free_irq(kirq->irq, kirq);  in keystone_irq_remove()
194 		irq_dispose_mapping(irq_find_mapping(kirq->irqd, hwirq));  in keystone_irq_remove()
196 	irq_domain_remove(kirq->irqd);  in keystone_irq_remove()
200 	{ .compatible = "ti,keystone-irq", },
219 MODULE_DESCRIPTION("Keystone IRQ chip");