1 // SPDX-License-Identifier: GPL-2.0
3  *  Turris Mox Moxtet GPIO expander
9 #include <linux/gpio/driver.h>
10 #include <linux/moxtet.h>
39 	if (chip->desc->in_mask & BIT(offset)) {  in moxtet_gpio_get_value()
40 		ret = moxtet_device_read(chip->dev);  in moxtet_gpio_get_value()
41 	} else if (chip->desc->out_mask & BIT(offset)) {  in moxtet_gpio_get_value()
42 		ret = moxtet_device_written(chip->dev);  in moxtet_gpio_get_value()
46 		return -EINVAL;  in moxtet_gpio_get_value()
61 	state = moxtet_device_written(chip->dev);  in moxtet_gpio_set_value()
65 	offset -= MOXTET_GPIO_INPUTS;  in moxtet_gpio_set_value()
72 	return moxtet_device_write(chip->dev, state);  in moxtet_gpio_set_value()
80 	if (chip->desc->in_mask & BIT(offset))  in moxtet_gpio_get_direction()
82 	else if (chip->desc->out_mask & BIT(offset))  in moxtet_gpio_get_direction()
85 		return -EINVAL;  in moxtet_gpio_get_direction()
93 	if (chip->desc->in_mask & BIT(offset))  in moxtet_gpio_direction_input()
95 	else if (chip->desc->out_mask & BIT(offset))  in moxtet_gpio_direction_input()
96 		return -ENOTSUPP;  in moxtet_gpio_direction_input()
98 		return -EINVAL;  in moxtet_gpio_direction_input()
106 	if (chip->desc->out_mask & BIT(offset))  in moxtet_gpio_direction_output()
108 	else if (chip->desc->in_mask & BIT(offset))  in moxtet_gpio_direction_output()
109 		return -ENOTSUPP;  in moxtet_gpio_direction_output()
111 	return -EINVAL;  in moxtet_gpio_direction_output()
117 	struct device_node *nc = dev->of_node;  in moxtet_gpio_probe()
120 	id = to_moxtet_device(dev)->id;  in moxtet_gpio_probe()
123 		dev_err(dev, "%pOF Moxtet device id 0x%x is not supported by gpio-moxtet driver\n",  in moxtet_gpio_probe()
125 		return -ENOTSUPP;  in moxtet_gpio_probe()
130 		return -ENOMEM;  in moxtet_gpio_probe()
132 	chip->dev = dev;  in moxtet_gpio_probe()
133 	chip->gpio_chip.parent = dev;  in moxtet_gpio_probe()
134 	chip->desc = &descs[id];  in moxtet_gpio_probe()
138 	chip->gpio_chip.label = dev_name(dev);  in moxtet_gpio_probe()
139 	chip->gpio_chip.get_direction = moxtet_gpio_get_direction;  in moxtet_gpio_probe()
140 	chip->gpio_chip.direction_input = moxtet_gpio_direction_input;  in moxtet_gpio_probe()
141 	chip->gpio_chip.direction_output = moxtet_gpio_direction_output;  in moxtet_gpio_probe()
142 	chip->gpio_chip.get = moxtet_gpio_get_value;  in moxtet_gpio_probe()
143 	chip->gpio_chip.set = moxtet_gpio_set_value;  in moxtet_gpio_probe()
144 	chip->gpio_chip.base = -1;  in moxtet_gpio_probe()
146 	chip->gpio_chip.ngpio = MOXTET_GPIO_NGPIOS;  in moxtet_gpio_probe()
148 	chip->gpio_chip.can_sleep = true;  in moxtet_gpio_probe()
149 	chip->gpio_chip.owner = THIS_MODULE;  in moxtet_gpio_probe()
151 	return devm_gpiochip_add_data(dev, &chip->gpio_chip, chip);  in moxtet_gpio_probe()
155 	{ .compatible = "cznic,moxtet-gpio", },
167 		.name		= "moxtet-gpio",
176 MODULE_DESCRIPTION("Turris Mox Moxtet GPIO expander");