1 // SPDX-License-Identifier: GPL-2.0+
3  * Loongson GPIO Support
5  * Copyright (C) 2022-2023 Loongson Technology Corporation Limited
13 #include <linux/gpio/driver.h>
49 	writeb(bval, lgpio->reg_base + lgpio->chip_data->conf_offset + pin);  in loongson_commit_direction()
56 	writeb(bval, lgpio->reg_base + lgpio->chip_data->out_offset + pin);  in loongson_commit_level()
64 	spin_lock_irqsave(&lgpio->lock, flags);  in loongson_gpio_direction_input()
66 	spin_unlock_irqrestore(&lgpio->lock, flags);  in loongson_gpio_direction_input()
76 	spin_lock_irqsave(&lgpio->lock, flags);  in loongson_gpio_direction_output()
79 	spin_unlock_irqrestore(&lgpio->lock, flags);  in loongson_gpio_direction_output()
90 	bval = readb(lgpio->reg_base + lgpio->chip_data->in_offset + pin);  in loongson_gpio_get()
101 	bval = readb(lgpio->reg_base + lgpio->chip_data->conf_offset + pin);  in loongson_gpio_get_direction()
113 	spin_lock_irqsave(&lgpio->lock, flags);  in loongson_gpio_set()
115 	spin_unlock_irqrestore(&lgpio->lock, flags);  in loongson_gpio_set()
120 	struct platform_device *pdev = to_platform_device(chip->parent);  in loongson_gpio_to_irq()
131 	lgpio->reg_base = reg_base;  in loongson_gpio_init()
133 	if (lgpio->chip_data->mode == BIT_CTRL_MODE) {  in loongson_gpio_init()
134 		ret = bgpio_init(&lgpio->chip, dev, 8,  in loongson_gpio_init()
135 				lgpio->reg_base + lgpio->chip_data->in_offset,  in loongson_gpio_init()
136 				lgpio->reg_base + lgpio->chip_data->out_offset,  in loongson_gpio_init()
138 				lgpio->reg_base + lgpio->chip_data->conf_offset,  in loongson_gpio_init()
141 			dev_err(dev, "unable to init generic GPIO\n");  in loongson_gpio_init()
145 		lgpio->chip.direction_input = loongson_gpio_direction_input;  in loongson_gpio_init()
146 		lgpio->chip.get = loongson_gpio_get;  in loongson_gpio_init()
147 		lgpio->chip.get_direction = loongson_gpio_get_direction;  in loongson_gpio_init()
148 		lgpio->chip.direction_output = loongson_gpio_direction_output;  in loongson_gpio_init()
149 		lgpio->chip.set = loongson_gpio_set;  in loongson_gpio_init()
150 		lgpio->chip.parent = dev;  in loongson_gpio_init()
151 		spin_lock_init(&lgpio->lock);  in loongson_gpio_init()
156 	lgpio->chip.can_sleep = 0;  in loongson_gpio_init()
157 	lgpio->chip.ngpio = ngpios;  in loongson_gpio_init()
158 	lgpio->chip.label = lgpio->chip_data->label;  in loongson_gpio_init()
159 	lgpio->chip.to_irq = loongson_gpio_to_irq;  in loongson_gpio_init()
161 	return devm_gpiochip_add_data(dev, &lgpio->chip, lgpio);  in loongson_gpio_init()
168 	struct device_node *np = pdev->dev.of_node;  in loongson_gpio_probe()
169 	struct device *dev = &pdev->dev;  in loongson_gpio_probe()
173 		return -ENOMEM;  in loongson_gpio_probe()
175 	lgpio->chip_data = device_get_match_data(dev);  in loongson_gpio_probe()
202 		.compatible = "loongson,ls2k-gpio",
206 		.compatible = "loongson,ls7a-gpio",
224 		.name = "loongson-gpio",
237 MODULE_DESCRIPTION("Loongson gpio driver");