1 // SPDX-License-Identifier: GPL-2.0
3  * Toshiba Visconti GPIO Support
11 #include <linux/gpio/driver.h>
33 	spinlock_t lock; /* protect gpio register */
49 	spin_lock_irqsave(&priv->lock, flags);  in visconti_gpio_irq_set_type()
51 	odata = readl(priv->base + GPIO_ODATA);  in visconti_gpio_irq_set_type()
52 	intmode = readl(priv->base + GPIO_INTMODE);  in visconti_gpio_irq_set_type()
77 		ret = -EINVAL;  in visconti_gpio_irq_set_type()
81 	writel(odata, priv->base + GPIO_ODATA);  in visconti_gpio_irq_set_type()
82 	writel(intmode, priv->base + GPIO_INTMODE);  in visconti_gpio_irq_set_type()
87 	spin_unlock_irqrestore(&priv->lock, flags);  in visconti_gpio_irq_set_type()
104 	return -EINVAL;  in visconti_gpio_child_to_parent_hwirq()
112 	struct irq_fwspec *fwspec = &gfwspec->fwspec;  in visconti_gpio_populate_parent_fwspec()
114 	fwspec->fwnode = chip->irq.parent_domain->fwnode;  in visconti_gpio_populate_parent_fwspec()
115 	fwspec->param_count = 3;  in visconti_gpio_populate_parent_fwspec()
116 	fwspec->param[0] = 0;  in visconti_gpio_populate_parent_fwspec()
117 	fwspec->param[1] = parent_hwirq;  in visconti_gpio_populate_parent_fwspec()
118 	fwspec->param[2] = parent_type;  in visconti_gpio_populate_parent_fwspec()
144 	seq_printf(p, dev_name(priv->dev));  in visconti_gpio_irq_print_chip()
160 	struct device *dev = &pdev->dev;  in visconti_gpio_probe()
169 		return -ENOMEM;  in visconti_gpio_probe()
171 	spin_lock_init(&priv->lock);  in visconti_gpio_probe()
172 	priv->dev = dev;  in visconti_gpio_probe()
174 	priv->base = devm_platform_ioremap_resource(pdev, 0);  in visconti_gpio_probe()
175 	if (IS_ERR(priv->base))  in visconti_gpio_probe()
176 		return PTR_ERR(priv->base);  in visconti_gpio_probe()
178 	irq_parent = of_irq_find_parent(dev->of_node);  in visconti_gpio_probe()
181 		return -ENODEV;  in visconti_gpio_probe()
188 		return -ENODEV;  in visconti_gpio_probe()
191 	ret = bgpio_init(&priv->gpio_chip, dev, 4,  in visconti_gpio_probe()
192 			 priv->base + GPIO_IDATA,  in visconti_gpio_probe()
193 			 priv->base + GPIO_OSET,  in visconti_gpio_probe()
194 			 priv->base + GPIO_OCLR,  in visconti_gpio_probe()
195 			 priv->base + GPIO_DIR,  in visconti_gpio_probe()
199 		dev_err(dev, "unable to init generic GPIO\n");  in visconti_gpio_probe()
203 	girq = &priv->gpio_chip.irq;  in visconti_gpio_probe()
205 	girq->fwnode = of_node_to_fwnode(dev->of_node);  in visconti_gpio_probe()
206 	girq->parent_domain = parent;  in visconti_gpio_probe()
207 	girq->child_to_parent_hwirq = visconti_gpio_child_to_parent_hwirq;  in visconti_gpio_probe()
208 	girq->populate_parent_alloc_arg = visconti_gpio_populate_parent_fwspec;  in visconti_gpio_probe()
209 	girq->default_type = IRQ_TYPE_NONE;  in visconti_gpio_probe()
210 	girq->handler = handle_level_irq;  in visconti_gpio_probe()
212 	return devm_gpiochip_add_data(dev, &priv->gpio_chip, priv);  in visconti_gpio_probe()
216 	{ .compatible = "toshiba,gpio-tmpv7708", },
231 MODULE_DESCRIPTION("Toshiba Visconti GPIO Driver");