44 static int pca9570_read(struct pca9570 *gpio, u8 *value)  in pca9570_read()  argument
46 	struct i2c_client *client = to_i2c_client(gpio->chip.parent);  in pca9570_read()
49 	if (gpio->chip_data->command != 0)  in pca9570_read()
50 		ret = i2c_smbus_read_byte_data(client, gpio->chip_data->command);  in pca9570_read()
61 static int pca9570_write(struct pca9570 *gpio, u8 value)  in pca9570_write()  argument
63 	struct i2c_client *client = to_i2c_client(gpio->chip.parent);  in pca9570_write()
65 	if (gpio->chip_data->command != 0)  in pca9570_write()
66 		return i2c_smbus_write_byte_data(client, gpio->chip_data->command, value);  in pca9570_write()
80 	struct pca9570 *gpio = gpiochip_get_data(chip);  in pca9570_get()  local
84 	ret = pca9570_read(gpio, &buffer);  in pca9570_get()
93 	struct pca9570 *gpio = gpiochip_get_data(chip);  in pca9570_set()  local
97 	mutex_lock(&gpio->lock);  in pca9570_set()
99 	buffer = gpio->out;  in pca9570_set()
105 	ret = pca9570_write(gpio, buffer);  in pca9570_set()
109 	gpio->out = buffer;  in pca9570_set()
112 	mutex_unlock(&gpio->lock);  in pca9570_set()
117 	struct pca9570 *gpio;  in pca9570_probe()  local
119 	gpio = devm_kzalloc(&client->dev, sizeof(*gpio), GFP_KERNEL);  in pca9570_probe()
120 	if (!gpio)  in pca9570_probe()
123 	gpio->chip.label = client->name;  in pca9570_probe()
124 	gpio->chip.parent = &client->dev;  in pca9570_probe()
125 	gpio->chip.owner = THIS_MODULE;  in pca9570_probe()
126 	gpio->chip.get_direction = pca9570_get_direction;  in pca9570_probe()
127 	gpio->chip.get = pca9570_get;  in pca9570_probe()
128 	gpio->chip.set = pca9570_set;  in pca9570_probe()
129 	gpio->chip.base = -1;  in pca9570_probe()
130 	gpio->chip_data = device_get_match_data(&client->dev);  in pca9570_probe()
131 	gpio->chip.ngpio = gpio->chip_data->ngpio;  in pca9570_probe()
132 	gpio->chip.can_sleep = true;  in pca9570_probe()
134 	mutex_init(&gpio->lock);  in pca9570_probe()
137 	pca9570_read(gpio, &gpio->out);  in pca9570_probe()
139 	i2c_set_clientdata(client, gpio);  in pca9570_probe()
141 	return devm_gpiochip_add_data(&client->dev, &gpio->chip, gpio);  in pca9570_probe()