iio/light/isl29125.c

1 // SPDX-License-Identifier: GPL-2.0-only
3  * isl29125.c - Support for Intersil ISL29125 RGB light sensor
7  * RGB light sensor with 16-bit channels for red, green, blue);
8  * 7-bit I2C slave address 0x44
10  * TODO: interrupt support, IR compensation, thresholds, 12bit
44 #define ISL29125_SENSING_RANGE_0 5722   /* 375 lux full range */
45 #define ISL29125_SENSING_RANGE_1 152590 /* 10k lux full range */
47 #define ISL29125_MODE_RANGE BIT(3)
49 #define ISL29125_STATUS_CONV BIT(1)
54 	u16 buffer[8]; /* 3x 16-bit, padding, 8 bytes timestamp */
60 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
61 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
92 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_read_data()
93 		data->conf1 | isl29125_regs[si].mode);  in isl29125_read_data()
99 	while (tries--) {  in isl29125_read_data()
100 		ret = i2c_smbus_read_byte_data(data->client, ISL29125_STATUS);  in isl29125_read_data()
109 		dev_err(&data->client->dev, "data not ready\n");  in isl29125_read_data()
110 		ret = -EIO;  in isl29125_read_data()
114 	ret = i2c_smbus_read_word_data(data->client, isl29125_regs[si].data);  in isl29125_read_data()
117 	i2c_smbus_write_byte_data(data->client, ISL29125_CONF1, data->conf1);  in isl29125_read_data()
133 		ret = isl29125_read_data(data, chan->scan_index);  in isl29125_read_raw()
141 		if (data->conf1 & ISL29125_MODE_RANGE)  in isl29125_read_raw()
142 			*val2 = ISL29125_SENSING_RANGE_1; /*10k lux full range*/  in isl29125_read_raw()
144 			*val2 = ISL29125_SENSING_RANGE_0; /*375 lux full range*/  in isl29125_read_raw()
147 	return -EINVAL;  in isl29125_read_raw()
159 			return -EINVAL;  in isl29125_write_raw()
161 			data->conf1 |= ISL29125_MODE_RANGE;  in isl29125_write_raw()
163 			data->conf1 &= ~ISL29125_MODE_RANGE;  in isl29125_write_raw()
165 			return -EINVAL;  in isl29125_write_raw()
166 		return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_write_raw()
167 			data->conf1);  in isl29125_write_raw()
169 		return -EINVAL;  in isl29125_write_raw()
176 	struct iio_dev *indio_dev = pf->indio_dev;  in isl29125_trigger_handler()
180 	for_each_set_bit(i, indio_dev->active_scan_mask,  in isl29125_trigger_handler()
181 		indio_dev->masklength) {  in isl29125_trigger_handler()
182 		int ret = i2c_smbus_read_word_data(data->client,  in isl29125_trigger_handler()
187 		data->buffer[j++] = ret;  in isl29125_trigger_handler()
190 	iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,  in isl29125_trigger_handler()
194 	iio_trigger_notify_done(indio_dev->trig);  in isl29125_trigger_handler()
220 	data->conf1 |= ISL29125_MODE_RGB;  in isl29125_buffer_postenable()
221 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_buffer_postenable()
222 		data->conf1);  in isl29125_buffer_postenable()
229 	data->conf1 &= ~ISL29125_MODE_MASK;  in isl29125_buffer_predisable()
230 	data->conf1 |= ISL29125_MODE_PD;  in isl29125_buffer_predisable()
231 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_buffer_predisable()
232 		data->conf1);  in isl29125_buffer_predisable()
247 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));  in isl29125_probe()
249 		return -ENOMEM;  in isl29125_probe()
253 	data->client = client;  in isl29125_probe()
255 	indio_dev->info = &isl29125_info;  in isl29125_probe()
256 	indio_dev->name = ISL29125_DRV_NAME;  in isl29125_probe()
257 	indio_dev->channels = isl29125_channels;  in isl29125_probe()
258 	indio_dev->num_channels = ARRAY_SIZE(isl29125_channels);  in isl29125_probe()
259 	indio_dev->modes = INDIO_DIRECT_MODE;  in isl29125_probe()
261 	ret = i2c_smbus_read_byte_data(data->client, ISL29125_DEVICE_ID);  in isl29125_probe()
265 		return -ENODEV;  in isl29125_probe()
267 	data->conf1 = ISL29125_MODE_PD | ISL29125_MODE_RANGE;  in isl29125_probe()
268 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_probe()
269 		data->conf1);  in isl29125_probe()
273 	ret = i2c_smbus_write_byte_data(data->client, ISL29125_STATUS, 0);  in isl29125_probe()
295 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_powerdown()
296 		(data->conf1 & ~ISL29125_MODE_MASK) | ISL29125_MODE_PD);  in isl29125_powerdown()
322 	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,  in isl29125_resume()
323 		data->conf1);  in isl29125_resume()