1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/gpio/driver.h>
23 	void __iomem *gpio;  member
30 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_dispatch()  local
37 	pending = readl(ctrl->pic + IDT_PIC_IRQ_PEND);  in idt_gpio_dispatch()
38 	pending &= ~ctrl->mask_cache;  in idt_gpio_dispatch()
39 	for_each_set_bit(bit, &pending, gc->ngpio) {  in idt_gpio_dispatch()
40 		virq = irq_linear_revmap(gc->irq.domain, bit);  in idt_gpio_dispatch()
51 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_irq_set_type()  local
58 		return -EINVAL;  in idt_gpio_irq_set_type()
60 	raw_spin_lock_irqsave(&gc->bgpio_lock, flags);  in idt_gpio_irq_set_type()
62 	ilevel = readl(ctrl->gpio + IDT_GPIO_ILEVEL);  in idt_gpio_irq_set_type()
64 		ilevel |= BIT(d->hwirq);  in idt_gpio_irq_set_type()
66 		ilevel &= ~BIT(d->hwirq);  in idt_gpio_irq_set_type()
68 	writel(ilevel, ctrl->gpio + IDT_GPIO_ILEVEL);  in idt_gpio_irq_set_type()
71 	raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);  in idt_gpio_irq_set_type()
78 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_ack()  local
80 	writel(~BIT(d->hwirq), ctrl->gpio + IDT_GPIO_ISTAT);  in idt_gpio_ack()
86 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_mask()  local
89 	raw_spin_lock_irqsave(&gc->bgpio_lock, flags);  in idt_gpio_mask()
91 	ctrl->mask_cache |= BIT(d->hwirq);  in idt_gpio_mask()
92 	writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);  in idt_gpio_mask()
94 	raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);  in idt_gpio_mask()
102 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_unmask()  local
106 	raw_spin_lock_irqsave(&gc->bgpio_lock, flags);  in idt_gpio_unmask()
108 	ctrl->mask_cache &= ~BIT(d->hwirq);  in idt_gpio_unmask()
109 	writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);  in idt_gpio_unmask()
111 	raw_spin_unlock_irqrestore(&gc->bgpio_lock, flags);  in idt_gpio_unmask()
116 	struct idt_gpio_ctrl *ctrl = gpiochip_get_data(gc);  in idt_gpio_irq_init_hw()  local
119 	ctrl->mask_cache = 0xffffffff;  in idt_gpio_irq_init_hw()
120 	writel(ctrl->mask_cache, ctrl->pic + IDT_PIC_IRQ_MASK);  in idt_gpio_irq_init_hw()
137 	struct device *dev = &pdev->dev;  in idt_gpio_probe()
139 	struct idt_gpio_ctrl *ctrl;  in idt_gpio_probe()  local
145 	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);  in idt_gpio_probe()
146 	if (!ctrl)  in idt_gpio_probe()
147 		return -ENOMEM;  in idt_gpio_probe()
149 	ctrl->gpio = devm_platform_ioremap_resource_byname(pdev, "gpio");  in idt_gpio_probe()
150 	if (IS_ERR(ctrl->gpio))  in idt_gpio_probe()
151 		return PTR_ERR(ctrl->gpio);  in idt_gpio_probe()
153 	ctrl->gc.parent = dev;  in idt_gpio_probe()
155 	ret = bgpio_init(&ctrl->gc, &pdev->dev, 4, ctrl->gpio + IDT_GPIO_DATA,  in idt_gpio_probe()
156 			 NULL, NULL, ctrl->gpio + IDT_GPIO_DIR, NULL, 0);  in idt_gpio_probe()
164 		ctrl->gc.ngpio = ngpios;  in idt_gpio_probe()
166 	if (device_property_read_bool(dev, "interrupt-controller")) {  in idt_gpio_probe()
167 		ctrl->pic = devm_platform_ioremap_resource_byname(pdev, "pic");  in idt_gpio_probe()
168 		if (IS_ERR(ctrl->pic))  in idt_gpio_probe()
169 			return PTR_ERR(ctrl->pic);  in idt_gpio_probe()
175 		girq = &ctrl->gc.irq;  in idt_gpio_probe()
177 		girq->init_hw = idt_gpio_irq_init_hw;  in idt_gpio_probe()
178 		girq->parent_handler = idt_gpio_dispatch;  in idt_gpio_probe()
179 		girq->num_parents = 1;  in idt_gpio_probe()
180 		girq->parents = devm_kcalloc(dev, girq->num_parents,  in idt_gpio_probe()
181 					     sizeof(*girq->parents),  in idt_gpio_probe()
183 		if (!girq->parents)  in idt_gpio_probe()
184 			return -ENOMEM;  in idt_gpio_probe()
186 		girq->parents[0] = parent_irq;  in idt_gpio_probe()
187 		girq->default_type = IRQ_TYPE_NONE;  in idt_gpio_probe()
188 		girq->handler = handle_bad_irq;  in idt_gpio_probe()
191 	return devm_gpiochip_add_data(&pdev->dev, &ctrl->gc, ctrl);  in idt_gpio_probe()
195 	{ .compatible = "idt,32434-gpio" },
203 		.name = "idt3243x-gpio",
209 MODULE_DESCRIPTION("IDT 79RC3243x GPIO/PIC Driver");