1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (C) 2014-2015 Capella Microsystems Inc.
8  * IIO driver for CM3232 (7-bit I2C slave address 0x10).
78  * cm3232_reg_init() - Initialize CM3232
87 	struct i2c_client *client = chip->client;  in cm3232_reg_init()
90 	chip->als_info = &cm3232_als_info_default;  in cm3232_reg_init()
95 		dev_err(&chip->client->dev, "Error reading addr_id\n");  in cm3232_reg_init()
99 	if ((ret & 0xFF) != chip->als_info->hw_id)  in cm3232_reg_init()
100 		return -ENODEV;  in cm3232_reg_init()
102 	/* Disable and reset device */  in cm3232_reg_init()
103 	chip->regs_cmd = CM3232_CMD_ALS_DISABLE | CM3232_CMD_ALS_RESET;  in cm3232_reg_init()
105 					chip->regs_cmd);  in cm3232_reg_init()
107 		dev_err(&chip->client->dev, "Error writing reg_cmd\n");  in cm3232_reg_init()
112 	chip->regs_cmd = chip->als_info->regs_cmd_default;  in cm3232_reg_init()
116 					chip->regs_cmd);  in cm3232_reg_init()
118 		dev_err(&chip->client->dev, "Error writing reg_cmd\n");  in cm3232_reg_init()
124  *  cm3232_read_als_it() - Get sensor integration time
129  *  Report the current integration time.
131  *  Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL.
138 	als_it = chip->regs_cmd;  in cm3232_read_als_it()
149 	return -EINVAL;  in cm3232_read_als_it()
153  * cm3232_write_als_it() - Write sensor integration time
164 	struct i2c_client *client = chip->client;  in cm3232_write_als_it()
176 			cmd = chip->regs_cmd & ~CM3232_CMD_ALS_IT_MASK;  in cm3232_write_als_it()
183 			chip->regs_cmd = cmd;  in cm3232_write_als_it()
187 	return -EINVAL;  in cm3232_write_als_it()
191  * cm3232_get_lux() - report current lux value
201 	struct i2c_client *client = chip->client;  in cm3232_get_lux()
202 	struct cm3232_als_info *als_info = chip->als_info;  in cm3232_get_lux()
211 		return -EINVAL;  in cm3232_get_lux()
213 	lux = (__force u64)als_info->mlux_per_bit;  in cm3232_get_lux()
214 	lux *= als_info->mlux_per_bit_base_it;  in cm3232_get_lux()
219 		dev_err(&client->dev, "Error reading reg_addr_als\n");  in cm3232_get_lux()
223 	chip->regs_als = (u16)ret;  in cm3232_get_lux()
224 	lux *= chip->regs_als;  in cm3232_get_lux()
225 	lux *= als_info->calibscale;  in cm3232_get_lux()
237 			int *val, int *val2, long mask)  in cm3232_read_raw()  argument
240 	struct cm3232_als_info *als_info = chip->als_info;  in cm3232_read_raw()
243 	switch (mask) {  in cm3232_read_raw()
251 		*val = als_info->calibscale;  in cm3232_read_raw()
257 	return -EINVAL;  in cm3232_read_raw()
262 			int val, int val2, long mask)  in cm3232_write_raw()  argument
265 	struct cm3232_als_info *als_info = chip->als_info;  in cm3232_write_raw()
267 	switch (mask) {  in cm3232_write_raw()
269 		als_info->calibscale = val;  in cm3232_write_raw()
275 	return -EINVAL;  in cm3232_write_raw()
279  * cm3232_get_it_available() - Get available ALS IT value
294 		len += scnprintf(buf + len, PAGE_SIZE - len, "%u.%06u ",  in cm3232_get_it_available()
297 	return len + scnprintf(buf + len, PAGE_SIZE - len, "\n");  in cm3232_get_it_available()
335 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));  in cm3232_probe()
337 		return -ENOMEM;  in cm3232_probe()
341 	chip->client = client;  in cm3232_probe()
343 	indio_dev->channels = cm3232_channels;  in cm3232_probe()
344 	indio_dev->num_channels = ARRAY_SIZE(cm3232_channels);  in cm3232_probe()
345 	indio_dev->info = &cm3232_info;  in cm3232_probe()
346 	indio_dev->name = id->name;  in cm3232_probe()
347 	indio_dev->modes = INDIO_DIRECT_MODE;  in cm3232_probe()
351 		dev_err(&client->dev,  in cm3232_probe()
379 	struct i2c_client *client = chip->client;  in cm3232_suspend()
382 	chip->regs_cmd |= CM3232_CMD_ALS_DISABLE;  in cm3232_suspend()
384 					chip->regs_cmd);  in cm3232_suspend()
393 	struct i2c_client *client = chip->client;  in cm3232_resume()
396 	chip->regs_cmd &= ~CM3232_CMD_ALS_DISABLE;  in cm3232_resume()
398 					chip->regs_cmd | CM3232_CMD_ALS_RESET);  in cm3232_resume()