1 // SPDX-License-Identifier: GPL-2.0-or-later
3  *  m62332.c - Support for Mitsubishi m62332 DAC
5  *  Copyright (c) 2014 Dmitry Eremin-Solenikov
34 	struct i2c_client *client = data->client;  in m62332_set_value()
38 	if (val == data->raw[channel])  in m62332_set_value()
44 	mutex_lock(&data->mutex);  in m62332_set_value()
47 		res = regulator_enable(data->vcc);  in m62332_set_value()
54 		res = -EIO;  in m62332_set_value()
58 	data->raw[channel] = val;  in m62332_set_value()
61 		regulator_disable(data->vcc);  in m62332_set_value()
63 	mutex_unlock(&data->mutex);  in m62332_set_value()
68 	mutex_unlock(&data->mutex);  in m62332_set_value()
84 		/* Corresponds to Vref / 2^(bits) */  in m62332_read_raw()
85 		ret = regulator_get_voltage(data->vcc);  in m62332_read_raw()
89 		*val = ret / 1000; /* mV */  in m62332_read_raw()
94 		*val = data->raw[chan->channel];  in m62332_read_raw()
105 	return -EINVAL;  in m62332_read_raw()
115 			return -EINVAL;  in m62332_write_raw()
117 		return m62332_set_value(indio_dev, val, chan->channel);  in m62332_write_raw()
122 	return -EINVAL;  in m62332_write_raw()
132 	data->save[0] = data->raw[0];  in m62332_suspend()
133 	data->save[1] = data->raw[1];  in m62332_suspend()
149 	ret = m62332_set_value(indio_dev, data->save[0], 0);  in m62332_resume()
153 	return m62332_set_value(indio_dev, data->save[1], 1);  in m62332_resume()
185 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in m62332_probe()
187 		return -ENOMEM;  in m62332_probe()
191 	data->client = client;  in m62332_probe()
193 	mutex_init(&data->mutex);  in m62332_probe()
195 	data->vcc = devm_regulator_get(&client->dev, "VCC");  in m62332_probe()
196 	if (IS_ERR(data->vcc))  in m62332_probe()
197 		return PTR_ERR(data->vcc);  in m62332_probe()
199 	indio_dev->num_channels = ARRAY_SIZE(m62332_channels);  in m62332_probe()
200 	indio_dev->channels = m62332_channels;  in m62332_probe()
201 	indio_dev->modes = INDIO_DIRECT_MODE;  in m62332_probe()
202 	indio_dev->info = &m62332_info;  in m62332_probe()
204 	ret = iio_map_array_register(indio_dev, client->dev.platform_data);  in m62332_probe()
247 MODULE_AUTHOR("Dmitry Eremin-Solenikov");
248 MODULE_DESCRIPTION("M62332 8-bit DAC");