1 // SPDX-License-Identifier: GPL-2.0-only
3  *  linux/drivers/gpio/gpio-mb86s7x.c
23 #include "gpiolib-acpi.h"
33 #define OFFSET(x)	BIT((x) % 8)  macro
38 	spinlock_t lock;  member
47 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_request()
49 	val = readl(gchip->base + PFR(gpio));  in mb86s70_gpio_request()
50 	val &= ~OFFSET(gpio);  in mb86s70_gpio_request()
51 	writel(val, gchip->base + PFR(gpio));  in mb86s70_gpio_request()
53 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_request()
64 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_free()
66 	val = readl(gchip->base + PFR(gpio));  in mb86s70_gpio_free()
67 	val |= OFFSET(gpio);  in mb86s70_gpio_free()
68 	writel(val, gchip->base + PFR(gpio));  in mb86s70_gpio_free()
70 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_free()
79 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_direction_input()
81 	val = readl(gchip->base + DDR(gpio));  in mb86s70_gpio_direction_input()
82 	val &= ~OFFSET(gpio);  in mb86s70_gpio_direction_input()
83 	writel(val, gchip->base + DDR(gpio));  in mb86s70_gpio_direction_input()
85 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_direction_input()
97 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_direction_output()
99 	val = readl(gchip->base + PDR(gpio));  in mb86s70_gpio_direction_output()
101 		val |= OFFSET(gpio);  in mb86s70_gpio_direction_output()
103 		val &= ~OFFSET(gpio);  in mb86s70_gpio_direction_output()
104 	writel(val, gchip->base + PDR(gpio));  in mb86s70_gpio_direction_output()
106 	val = readl(gchip->base + DDR(gpio));  in mb86s70_gpio_direction_output()
107 	val |= OFFSET(gpio);  in mb86s70_gpio_direction_output()
108 	writel(val, gchip->base + DDR(gpio));  in mb86s70_gpio_direction_output()
110 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_direction_output()
119 	return !!(readl(gchip->base + PDR(gpio)) & OFFSET(gpio));  in mb86s70_gpio_get()
128 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_set()
130 	val = readl(gchip->base + PDR(gpio));  in mb86s70_gpio_set()
132 		val |= OFFSET(gpio);  in mb86s70_gpio_set()
134 		val &= ~OFFSET(gpio);  in mb86s70_gpio_set()
135 	writel(val, gchip->base + PDR(gpio));  in mb86s70_gpio_set()
137 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_set()
140 static int mb86s70_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)  in mb86s70_gpio_to_irq()  argument
145 		irq = platform_get_irq(to_platform_device(gc->parent), index);  in mb86s70_gpio_to_irq()
148 		if (irq_get_irq_data(irq)->hwirq == offset)  in mb86s70_gpio_to_irq()
151 	return -EINVAL;  in mb86s70_gpio_to_irq()
160 	gchip = devm_kzalloc(&pdev->dev, sizeof(*gchip), GFP_KERNEL);  in mb86s70_gpio_probe()
162 		return -ENOMEM;  in mb86s70_gpio_probe()
166 	gchip->base = devm_platform_ioremap_resource(pdev, 0);  in mb86s70_gpio_probe()
167 	if (IS_ERR(gchip->base))  in mb86s70_gpio_probe()
168 		return PTR_ERR(gchip->base);  in mb86s70_gpio_probe()
170 	clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);  in mb86s70_gpio_probe()
174 	spin_lock_init(&gchip->lock);  in mb86s70_gpio_probe()
176 	gchip->gc.direction_output = mb86s70_gpio_direction_output;  in mb86s70_gpio_probe()
177 	gchip->gc.direction_input = mb86s70_gpio_direction_input;  in mb86s70_gpio_probe()
178 	gchip->gc.request = mb86s70_gpio_request;  in mb86s70_gpio_probe()
179 	gchip->gc.free = mb86s70_gpio_free;  in mb86s70_gpio_probe()
180 	gchip->gc.get = mb86s70_gpio_get;  in mb86s70_gpio_probe()
181 	gchip->gc.set = mb86s70_gpio_set;  in mb86s70_gpio_probe()
182 	gchip->gc.to_irq = mb86s70_gpio_to_irq;  in mb86s70_gpio_probe()
183 	gchip->gc.label = dev_name(&pdev->dev);  in mb86s70_gpio_probe()
184 	gchip->gc.ngpio = 32;  in mb86s70_gpio_probe()
185 	gchip->gc.owner = THIS_MODULE;  in mb86s70_gpio_probe()
186 	gchip->gc.parent = &pdev->dev;  in mb86s70_gpio_probe()
187 	gchip->gc.base = -1;  in mb86s70_gpio_probe()
189 	ret = gpiochip_add_data(&gchip->gc, gchip);  in mb86s70_gpio_probe()
191 		return dev_err_probe(&pdev->dev, ret,  in mb86s70_gpio_probe()
194 	acpi_gpiochip_request_interrupts(&gchip->gc);  in mb86s70_gpio_probe()
203 	acpi_gpiochip_free_interrupts(&gchip->gc);  in mb86s70_gpio_remove()
204 	gpiochip_remove(&gchip->gc);  in mb86s70_gpio_remove()
208 	{ .compatible = "fujitsu,mb86s70-gpio" },
223 		.name = "mb86s70-gpio",
233 MODULE_ALIAS("platform:mb86s70-gpio");