1 // SPDX-License-Identifier: GPL-2.0-or-later
25 	struct mutex lock;  member
36 static int cgbc_gpio_get(struct gpio_chip *chip, unsigned int offset)  in cgbc_gpio_get()  argument
39 	struct cgbc_device_data *cgbc = gpio->cgbc;  in cgbc_gpio_get()
43 	scoped_guard(mutex, &gpio->lock)  in cgbc_gpio_get()
44 		ret = cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_GET, (offset > 7) ? 1 : 0, 0, &val);  in cgbc_gpio_get()
46 	offset %= 8;  in cgbc_gpio_get()
51 		return (int)(val & (u8)BIT(offset));  in cgbc_gpio_get()
55 			    unsigned int offset, int value)  in __cgbc_gpio_set()  argument
58 	struct cgbc_device_data *cgbc = gpio->cgbc;  in __cgbc_gpio_set()
62 	ret = cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_GET, (offset > 7) ? 1 : 0, 0, &val);  in __cgbc_gpio_set()
67 		val |= BIT(offset % 8);  in __cgbc_gpio_set()
69 		val &= ~(BIT(offset % 8));  in __cgbc_gpio_set()
71 	cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_SET, (offset > 7) ? 1 : 0, val, &val);  in __cgbc_gpio_set()
75 			  unsigned int offset, int value)  in cgbc_gpio_set()  argument
79 	scoped_guard(mutex, &gpio->lock)  in cgbc_gpio_set()
80 		__cgbc_gpio_set(chip, offset, value);  in cgbc_gpio_set()
84 				   unsigned int offset, int direction)  in cgbc_gpio_direction_set()  argument
87 	struct cgbc_device_data *cgbc = gpio->cgbc;  in cgbc_gpio_direction_set()
91 	ret = cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_DIR_GET, (offset > 7) ? 1 : 0, 0, &val);  in cgbc_gpio_direction_set()
96 		val &= ~(BIT(offset % 8));  in cgbc_gpio_direction_set()
98 		val |= BIT(offset % 8);  in cgbc_gpio_direction_set()
100 	ret = cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_DIR_SET, (offset > 7) ? 1 : 0, val, &val);  in cgbc_gpio_direction_set()
107 				     unsigned int offset)  in cgbc_gpio_direction_input()  argument
111 	guard(mutex)(&gpio->lock);  in cgbc_gpio_direction_input()
112 	return cgbc_gpio_direction_set(chip, offset, GPIO_LINE_DIRECTION_IN);  in cgbc_gpio_direction_input()
116 				      unsigned int offset, int value)  in cgbc_gpio_direction_output()  argument
120 	guard(mutex)(&gpio->lock);  in cgbc_gpio_direction_output()
122 	__cgbc_gpio_set(chip, offset, value);  in cgbc_gpio_direction_output()
123 	return cgbc_gpio_direction_set(chip, offset, GPIO_LINE_DIRECTION_OUT);  in cgbc_gpio_direction_output()
126 static int cgbc_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)  in cgbc_gpio_get_direction()  argument
129 	struct cgbc_device_data *cgbc = gpio->cgbc;  in cgbc_gpio_get_direction()
133 	scoped_guard(mutex, &gpio->lock)  in cgbc_gpio_get_direction()
134 		ret = cgbc_gpio_cmd(cgbc, CGBC_GPIO_CMD_DIR_GET, (offset > 7) ? 1 : 0, 0, &val);  in cgbc_gpio_get_direction()
139 	if (val & BIT(offset % 8))  in cgbc_gpio_get_direction()
147 	struct device *dev = &pdev->dev;  in cgbc_gpio_probe()
148 	struct cgbc_device_data *cgbc = dev_get_drvdata(dev->parent);  in cgbc_gpio_probe()
155 		return -ENOMEM;  in cgbc_gpio_probe()
157 	gpio->cgbc = cgbc;  in cgbc_gpio_probe()
161 	chip = &gpio->chip;  in cgbc_gpio_probe()
162 	chip->label = dev_name(&pdev->dev);  in cgbc_gpio_probe()
163 	chip->owner = THIS_MODULE;  in cgbc_gpio_probe()
164 	chip->parent = dev;  in cgbc_gpio_probe()
165 	chip->base = -1;  in cgbc_gpio_probe()
166 	chip->direction_input = cgbc_gpio_direction_input;  in cgbc_gpio_probe()
167 	chip->direction_output = cgbc_gpio_direction_output;  in cgbc_gpio_probe()
168 	chip->get_direction = cgbc_gpio_get_direction;  in cgbc_gpio_probe()
169 	chip->get = cgbc_gpio_get;  in cgbc_gpio_probe()
170 	chip->set = cgbc_gpio_set;  in cgbc_gpio_probe()
171 	chip->ngpio = CGBC_GPIO_NGPIO;  in cgbc_gpio_probe()
173 	ret = devm_mutex_init(dev, &gpio->lock);  in cgbc_gpio_probe()
186 		.name = "cgbc-gpio",
196 MODULE_ALIAS("platform:cgbc-gpio");