1 // SPDX-License-Identifier: GPL-2.0-only
3  *  linux/drivers/gpio/gpio-mb86s7x.c
18 #include <linux/gpio/driver.h>
23 #include "gpiolib-acpi.h"
42 static int mb86s70_gpio_request(struct gpio_chip *gc, unsigned gpio)  in mb86s70_gpio_request()  argument
48 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_request()
50 	val = readl(gchip->base + PFR(gpio));  in mb86s70_gpio_request()
51 	val &= ~OFFSET(gpio);  in mb86s70_gpio_request()
52 	writel(val, gchip->base + PFR(gpio));  in mb86s70_gpio_request()
54 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_request()
59 static void mb86s70_gpio_free(struct gpio_chip *gc, unsigned gpio)  in mb86s70_gpio_free()  argument
65 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_free()
67 	val = readl(gchip->base + PFR(gpio));  in mb86s70_gpio_free()
68 	val |= OFFSET(gpio);  in mb86s70_gpio_free()
69 	writel(val, gchip->base + PFR(gpio));  in mb86s70_gpio_free()
71 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_free()
74 static int mb86s70_gpio_direction_input(struct gpio_chip *gc, unsigned gpio)  in mb86s70_gpio_direction_input()  argument
80 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_direction_input()
82 	val = readl(gchip->base + DDR(gpio));  in mb86s70_gpio_direction_input()
83 	val &= ~OFFSET(gpio);  in mb86s70_gpio_direction_input()
84 	writel(val, gchip->base + DDR(gpio));  in mb86s70_gpio_direction_input()
86 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_direction_input()
92 					 unsigned gpio, int value)  in mb86s70_gpio_direction_output()  argument
98 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_direction_output()
100 	val = readl(gchip->base + PDR(gpio));  in mb86s70_gpio_direction_output()
102 		val |= OFFSET(gpio);  in mb86s70_gpio_direction_output()
104 		val &= ~OFFSET(gpio);  in mb86s70_gpio_direction_output()
105 	writel(val, gchip->base + PDR(gpio));  in mb86s70_gpio_direction_output()
107 	val = readl(gchip->base + DDR(gpio));  in mb86s70_gpio_direction_output()
108 	val |= OFFSET(gpio);  in mb86s70_gpio_direction_output()
109 	writel(val, gchip->base + DDR(gpio));  in mb86s70_gpio_direction_output()
111 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_direction_output()
116 static int mb86s70_gpio_get(struct gpio_chip *gc, unsigned gpio)  in mb86s70_gpio_get()  argument
120 	return !!(readl(gchip->base + PDR(gpio)) & OFFSET(gpio));  in mb86s70_gpio_get()
123 static void mb86s70_gpio_set(struct gpio_chip *gc, unsigned gpio, int value)  in mb86s70_gpio_set()  argument
129 	spin_lock_irqsave(&gchip->lock, flags);  in mb86s70_gpio_set()
131 	val = readl(gchip->base + PDR(gpio));  in mb86s70_gpio_set()
133 		val |= OFFSET(gpio);  in mb86s70_gpio_set()
135 		val &= ~OFFSET(gpio);  in mb86s70_gpio_set()
136 	writel(val, gchip->base + PDR(gpio));  in mb86s70_gpio_set()
138 	spin_unlock_irqrestore(&gchip->lock, flags);  in mb86s70_gpio_set()
146 		irq = platform_get_irq(to_platform_device(gc->parent), index);  in mb86s70_gpio_to_irq()
151 		if (irq_get_irq_data(irq)->hwirq == offset)  in mb86s70_gpio_to_irq()
154 	return -EINVAL;  in mb86s70_gpio_to_irq()
162 	gchip = devm_kzalloc(&pdev->dev, sizeof(*gchip), GFP_KERNEL);  in mb86s70_gpio_probe()
164 		return -ENOMEM;  in mb86s70_gpio_probe()
168 	gchip->base = devm_platform_ioremap_resource(pdev, 0);  in mb86s70_gpio_probe()
169 	if (IS_ERR(gchip->base))  in mb86s70_gpio_probe()
170 		return PTR_ERR(gchip->base);  in mb86s70_gpio_probe()
172 	gchip->clk = devm_clk_get_optional(&pdev->dev, NULL);  in mb86s70_gpio_probe()
173 	if (IS_ERR(gchip->clk))  in mb86s70_gpio_probe()
174 		return PTR_ERR(gchip->clk);  in mb86s70_gpio_probe()
176 	ret = clk_prepare_enable(gchip->clk);  in mb86s70_gpio_probe()
180 	spin_lock_init(&gchip->lock);  in mb86s70_gpio_probe()
182 	gchip->gc.direction_output = mb86s70_gpio_direction_output;  in mb86s70_gpio_probe()
183 	gchip->gc.direction_input = mb86s70_gpio_direction_input;  in mb86s70_gpio_probe()
184 	gchip->gc.request = mb86s70_gpio_request;  in mb86s70_gpio_probe()
185 	gchip->gc.free = mb86s70_gpio_free;  in mb86s70_gpio_probe()
186 	gchip->gc.get = mb86s70_gpio_get;  in mb86s70_gpio_probe()
187 	gchip->gc.set = mb86s70_gpio_set;  in mb86s70_gpio_probe()
188 	gchip->gc.to_irq = mb86s70_gpio_to_irq;  in mb86s70_gpio_probe()
189 	gchip->gc.label = dev_name(&pdev->dev);  in mb86s70_gpio_probe()
190 	gchip->gc.ngpio = 32;  in mb86s70_gpio_probe()
191 	gchip->gc.owner = THIS_MODULE;  in mb86s70_gpio_probe()
192 	gchip->gc.parent = &pdev->dev;  in mb86s70_gpio_probe()
193 	gchip->gc.base = -1;  in mb86s70_gpio_probe()
195 	ret = gpiochip_add_data(&gchip->gc, gchip);  in mb86s70_gpio_probe()
197 		dev_err(&pdev->dev, "couldn't register gpio driver\n");  in mb86s70_gpio_probe()
198 		clk_disable_unprepare(gchip->clk);  in mb86s70_gpio_probe()
202 	acpi_gpiochip_request_interrupts(&gchip->gc);  in mb86s70_gpio_probe()
211 	acpi_gpiochip_free_interrupts(&gchip->gc);  in mb86s70_gpio_remove()
212 	gpiochip_remove(&gchip->gc);  in mb86s70_gpio_remove()
213 	clk_disable_unprepare(gchip->clk);  in mb86s70_gpio_remove()
217 	{ .compatible = "fujitsu,mb86s70-gpio" },
232 		.name = "mb86s70-gpio",
241 MODULE_DESCRIPTION("MB86S7x GPIO Driver");
242 MODULE_ALIAS("platform:mb86s70-gpio");