1 // SPDX-License-Identifier: GPL-2.0-only
27 	struct mutex lock;  member
35 			unsigned int offset)  in exar_update()  argument
40 	mutex_lock(&exar_gpio->lock);  in exar_update()
41 	temp = readb(exar_gpio->regs + reg);  in exar_update()
42 	temp &= ~BIT(offset);  in exar_update()
44 		temp |= BIT(offset);  in exar_update()
45 	writeb(temp, exar_gpio->regs + reg);  in exar_update()
46 	mutex_unlock(&exar_gpio->lock);  in exar_update()
50 			      unsigned int offset)  in exar_set_direction()  argument
53 	unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?  in exar_set_direction()
55 	unsigned int bit  = (offset + exar_gpio->first_pin) % 8;  in exar_set_direction()
66 	mutex_lock(&exar_gpio->lock);  in exar_get()
67 	value = readb(exar_gpio->regs + reg);  in exar_get()
68 	mutex_unlock(&exar_gpio->lock);  in exar_get()
73 static int exar_get_direction(struct gpio_chip *chip, unsigned int offset)  in exar_get_direction()  argument
76 	unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?  in exar_get_direction()
78 	unsigned int bit  = (offset + exar_gpio->first_pin) % 8;  in exar_get_direction()
86 static int exar_get_value(struct gpio_chip *chip, unsigned int offset)  in exar_get_value()  argument
89 	unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?  in exar_get_value()
91 	unsigned int bit  = (offset + exar_gpio->first_pin) % 8;  in exar_get_value()
96 static void exar_set_value(struct gpio_chip *chip, unsigned int offset,  in exar_set_value()  argument
100 	unsigned int addr = (offset + exar_gpio->first_pin) / 8 ?  in exar_set_value()
102 	unsigned int bit  = (offset + exar_gpio->first_pin) % 8;  in exar_set_value()
107 static int exar_direction_output(struct gpio_chip *chip, unsigned int offset,  in exar_direction_output()  argument
110 	exar_set_value(chip, offset, value);  in exar_direction_output()
111 	return exar_set_direction(chip, 0, offset);  in exar_direction_output()
114 static int exar_direction_input(struct gpio_chip *chip, unsigned int offset)  in exar_direction_input()  argument
116 	return exar_set_direction(chip, 1, offset);  in exar_direction_input()
121 	struct pci_dev *pcidev = to_pci_dev(pdev->dev.parent);  in gpio_exar_probe()
129 	 * device - use it.  in gpio_exar_probe()
133 		return -ENOMEM;  in gpio_exar_probe()
135 	ret = device_property_read_u32(&pdev->dev, "exar,first-pin",  in gpio_exar_probe()
140 	ret = device_property_read_u32(&pdev->dev, "ngpios", &ngpios);  in gpio_exar_probe()
144 	exar_gpio = devm_kzalloc(&pdev->dev, sizeof(*exar_gpio), GFP_KERNEL);  in gpio_exar_probe()
146 		return -ENOMEM;  in gpio_exar_probe()
148 	mutex_init(&exar_gpio->lock);  in gpio_exar_probe()
156 	sprintf(exar_gpio->name, "exar_gpio%d", index);  in gpio_exar_probe()
157 	exar_gpio->gpio_chip.label = exar_gpio->name;  in gpio_exar_probe()
158 	exar_gpio->gpio_chip.parent = &pdev->dev;  in gpio_exar_probe()
159 	exar_gpio->gpio_chip.direction_output = exar_direction_output;  in gpio_exar_probe()
160 	exar_gpio->gpio_chip.direction_input = exar_direction_input;  in gpio_exar_probe()
161 	exar_gpio->gpio_chip.get_direction = exar_get_direction;  in gpio_exar_probe()
162 	exar_gpio->gpio_chip.get = exar_get_value;  in gpio_exar_probe()
163 	exar_gpio->gpio_chip.set = exar_set_value;  in gpio_exar_probe()
164 	exar_gpio->gpio_chip.base = -1;  in gpio_exar_probe()
165 	exar_gpio->gpio_chip.ngpio = ngpios;  in gpio_exar_probe()
166 	exar_gpio->regs = p;  in gpio_exar_probe()
167 	exar_gpio->index = index;  in gpio_exar_probe()
168 	exar_gpio->first_pin = first_pin;  in gpio_exar_probe()
170 	ret = devm_gpiochip_add_data(&pdev->dev,  in gpio_exar_probe()
171 				     &exar_gpio->gpio_chip, exar_gpio);  in gpio_exar_probe()
182 	mutex_destroy(&exar_gpio->lock);  in gpio_exar_probe()
190 	ida_simple_remove(&ida_index, exar_gpio->index);  in gpio_exar_remove()
191 	mutex_destroy(&exar_gpio->lock);  in gpio_exar_remove()