drivers/gpio/gpio-bd71828.c

1 // SPDX-License-Identifier: GPL-2.0-only
4 #include <linux/gpio/driver.h>
5 #include <linux/mfd/rohm-bd71828.h>
16 	struct gpio_chip gpio;  member
28 	 * we are dealing with - then we are done  in bd71828_gpio_set()
33 	ret = regmap_update_bits(bdgpio->regmap, GPIO_OUT_REG(offset),  in bd71828_gpio_set()
36 		dev_err(bdgpio->dev, "Could not set gpio to %d\n", value);  in bd71828_gpio_set()
46 		ret = regmap_read(bdgpio->regmap, BD71828_REG_IO_STAT,  in bd71828_gpio_get()
49 		ret = regmap_read(bdgpio->regmap, GPIO_OUT_REG(offset),  in bd71828_gpio_get()
63 		return -ENOTSUPP;  in bd71828_gpio_set_config()
67 		return regmap_update_bits(bdgpio->regmap,  in bd71828_gpio_set_config()
72 		return regmap_update_bits(bdgpio->regmap,  in bd71828_gpio_set_config()
79 	return -ENOTSUPP;  in bd71828_gpio_set_config()
86 	 * we trust that if the pin is not excluded by "gpio-reserved-ranges"  in bd71828_get_direction()
88 	 * on BD71828 can't really be used for general purpose input - input  in bd71828_get_direction()
100 	struct device *dev = &pdev->dev;  in bd71828_probe()
105 		return -ENOMEM;  in bd71828_probe()
107 	bdgpio->dev = dev;  in bd71828_probe()
108 	bdgpio->gpio.parent = dev->parent;  in bd71828_probe()
109 	bdgpio->gpio.label = "bd71828-gpio";  in bd71828_probe()
110 	bdgpio->gpio.owner = THIS_MODULE;  in bd71828_probe()
111 	bdgpio->gpio.get_direction = bd71828_get_direction;  in bd71828_probe()
112 	bdgpio->gpio.set_config = bd71828_gpio_set_config;  in bd71828_probe()
113 	bdgpio->gpio.can_sleep = true;  in bd71828_probe()
114 	bdgpio->gpio.get = bd71828_gpio_get;  in bd71828_probe()
115 	bdgpio->gpio.set = bd71828_gpio_set;  in bd71828_probe()
116 	bdgpio->gpio.base = -1;  in bd71828_probe()
121 	 * "gpio-reserved-ranges" and exclude them from control  in bd71828_probe()
123 	bdgpio->gpio.ngpio = 4;  in bd71828_probe()
124 	bdgpio->regmap = dev_get_regmap(dev->parent, NULL);  in bd71828_probe()
125 	if (!bdgpio->regmap)  in bd71828_probe()
126 		return -ENODEV;  in bd71828_probe()
128 	return devm_gpiochip_add_data(dev, &bdgpio->gpio, bdgpio);  in bd71828_probe()
133 		.name = "bd71828-gpio"
143 MODULE_ALIAS("platform:bd71828-gpio");