1 // SPDX-License-Identifier: GPL-2.0-only
13 #include <linux/gpio/driver.h>
37  * @domain: IRQ domain of GPIO generated interrupts managed by this controller
39  * @gc: gpio_chip structure associated to this GPIO controller
48 static inline u32 tb10x_reg_read(struct tb10x_gpio *gpio, unsigned int offs)  in tb10x_reg_read()  argument
50 	return ioread32(gpio->base + offs);  in tb10x_reg_read()
53 static inline void tb10x_reg_write(struct tb10x_gpio *gpio, unsigned int offs,  in tb10x_reg_write()  argument
56 	iowrite32(val, gpio->base + offs);  in tb10x_reg_write()
59 static inline void tb10x_set_bits(struct tb10x_gpio *gpio, unsigned int offs,  in tb10x_set_bits()  argument
65 	raw_spin_lock_irqsave(&gpio->gc.bgpio_lock, flags);  in tb10x_set_bits()
67 	r = tb10x_reg_read(gpio, offs);  in tb10x_set_bits()
70 	tb10x_reg_write(gpio, offs, r);  in tb10x_set_bits()
72 	raw_spin_unlock_irqrestore(&gpio->gc.bgpio_lock, flags);  in tb10x_set_bits()
79 	return irq_create_mapping(tb10x_gpio->domain, offset);  in tb10x_gpio_to_irq()
86 		return -EINVAL;  in tb10x_gpio_irq_set_type()
103 		generic_handle_domain_irq(tb10x_gpio->domain, i);  in tb10x_gpio_irq_cascade()
111 	struct device *dev = &pdev->dev;  in tb10x_gpio_probe()
112 	struct device_node *np = dev->of_node;  in tb10x_gpio_probe()
113 	int ret = -EBUSY;  in tb10x_gpio_probe()
117 		return -EINVAL;  in tb10x_gpio_probe()
120 		return -EINVAL;  in tb10x_gpio_probe()
124 		return -ENOMEM;  in tb10x_gpio_probe()
126 	tb10x_gpio->base = devm_platform_ioremap_resource(pdev, 0);  in tb10x_gpio_probe()
127 	if (IS_ERR(tb10x_gpio->base))  in tb10x_gpio_probe()
128 		return PTR_ERR(tb10x_gpio->base);  in tb10x_gpio_probe()
130 	tb10x_gpio->gc.label =  in tb10x_gpio_probe()
131 		devm_kasprintf(dev, GFP_KERNEL, "%pOF", pdev->dev.of_node);  in tb10x_gpio_probe()
132 	if (!tb10x_gpio->gc.label)  in tb10x_gpio_probe()
133 		return -ENOMEM;  in tb10x_gpio_probe()
136 	 * Initialize generic GPIO with one single register for reading and setting  in tb10x_gpio_probe()
140 	ret = bgpio_init(&tb10x_gpio->gc, dev, 4,  in tb10x_gpio_probe()
141 			 tb10x_gpio->base + OFFSET_TO_REG_DATA,  in tb10x_gpio_probe()
144 			 tb10x_gpio->base + OFFSET_TO_REG_DDR,  in tb10x_gpio_probe()
148 		dev_err(dev, "unable to init generic GPIO\n");  in tb10x_gpio_probe()
151 	tb10x_gpio->gc.base = -1;  in tb10x_gpio_probe()
152 	tb10x_gpio->gc.parent = dev;  in tb10x_gpio_probe()
153 	tb10x_gpio->gc.owner = THIS_MODULE;  in tb10x_gpio_probe()
156 	 * callback also overrides the one set up by generic GPIO.  in tb10x_gpio_probe()
158 	tb10x_gpio->gc.ngpio = ngpio;  in tb10x_gpio_probe()
159 	tb10x_gpio->gc.request = gpiochip_generic_request;  in tb10x_gpio_probe()
160 	tb10x_gpio->gc.free = gpiochip_generic_free;  in tb10x_gpio_probe()
162 	ret = devm_gpiochip_add_data(dev, &tb10x_gpio->gc, tb10x_gpio);  in tb10x_gpio_probe()
170 	if (of_property_read_bool(np, "interrupt-controller")) {  in tb10x_gpio_probe()
177 		tb10x_gpio->gc.to_irq	= tb10x_gpio_to_irq;  in tb10x_gpio_probe()
178 		tb10x_gpio->irq		= ret;  in tb10x_gpio_probe()
186 		tb10x_gpio->domain = irq_domain_create_linear(dev_fwnode(dev), tb10x_gpio->gc.ngpio,  in tb10x_gpio_probe()
188 		if (!tb10x_gpio->domain) {  in tb10x_gpio_probe()
189 			return -ENOMEM;  in tb10x_gpio_probe()
192 		ret = irq_alloc_domain_generic_chips(tb10x_gpio->domain,  in tb10x_gpio_probe()
193 				tb10x_gpio->gc.ngpio, 1, tb10x_gpio->gc.label,  in tb10x_gpio_probe()
199 		gc = tb10x_gpio->domain->gc->gc[0];  in tb10x_gpio_probe()
200 		gc->reg_base                         = tb10x_gpio->base;  in tb10x_gpio_probe()
201 		gc->chip_types[0].type               = IRQ_TYPE_EDGE_BOTH;  in tb10x_gpio_probe()
202 		gc->chip_types[0].chip.irq_ack       = irq_gc_ack_set_bit;  in tb10x_gpio_probe()
203 		gc->chip_types[0].chip.irq_mask      = irq_gc_mask_clr_bit;  in tb10x_gpio_probe()
204 		gc->chip_types[0].chip.irq_unmask    = irq_gc_mask_set_bit;  in tb10x_gpio_probe()
205 		gc->chip_types[0].chip.irq_set_type  = tb10x_gpio_irq_set_type;  in tb10x_gpio_probe()
206 		gc->chip_types[0].regs.ack           = OFFSET_TO_REG_CHANGE;  in tb10x_gpio_probe()
207 		gc->chip_types[0].regs.mask          = OFFSET_TO_REG_INT_EN;  in tb10x_gpio_probe()
213 	irq_domain_remove(tb10x_gpio->domain);  in tb10x_gpio_probe()
221 	if (tb10x_gpio->gc.to_irq) {  in tb10x_gpio_remove()
222 		irq_remove_generic_chip(tb10x_gpio->domain->gc->gc[0],  in tb10x_gpio_remove()
223 					BIT(tb10x_gpio->gc.ngpio) - 1, 0, 0);  in tb10x_gpio_remove()
224 		kfree(tb10x_gpio->domain->gc);  in tb10x_gpio_remove()
225 		irq_domain_remove(tb10x_gpio->domain);  in tb10x_gpio_remove()
230 	{ .compatible = "abilis,tb10x-gpio" },
239 		.name	= "tb10x-gpio",
246 MODULE_DESCRIPTION("tb10x gpio.");