2  * ads1015.c - lm_sensors driver for ads1015 12-bit 4-input ADC
31 #include <linux/hwmon-sysfs.h>
45 /* PGA fullscale voltages in mV */
78 	unsigned int pga = data->channel_data[channel].pga;  in ads1015_read_adc()  local
79 	unsigned int data_rate = data->channel_data[channel].data_rate;  in ads1015_read_adc()
81 	const unsigned int * const rate_table = data->id == ads1115 ?  in ads1015_read_adc()
85 	mutex_lock(&data->update_lock);  in ads1015_read_adc()
98 	config |= (pga & 0x0007) << 9;  in ads1015_read_adc()
113 		res = -EIO;  in ads1015_read_adc()
120 	mutex_unlock(&data->update_lock);  in ads1015_read_adc()
128 	unsigned int pga = data->channel_data[channel].pga;  in ads1015_reg_to_mv()  local
129 	int fullscale = fullscale_table[pga];  in ads1015_reg_to_mv()
130 	const int mask = data->id == ads1115 ? 0x7fff : 0x7ff0;  in ads1015_reg_to_mv()
142 	int index = attr->index;  in show_in()
171 	hwmon_device_unregister(data->hwmon_dev);  in ads1015_remove()
173 		device_remove_file(&client->dev, &ads1015_in[k].dev_attr);  in ads1015_remove()
183 	if (!client->dev.of_node  in ads1015_get_channels_config_of()
184 	    || !of_get_next_child(client->dev.of_node, NULL))  in ads1015_get_channels_config_of()
185 		return -EINVAL;  in ads1015_get_channels_config_of()
187 	for_each_child_of_node(client->dev.of_node, node) {  in ads1015_get_channels_config_of()
190 		unsigned int pga = ADS1015_DEFAULT_PGA;  in ads1015_get_channels_config_of()  local
194 			dev_err(&client->dev, "invalid reg on %pOF\n", node);  in ads1015_get_channels_config_of()
200 			dev_err(&client->dev,  in ads1015_get_channels_config_of()
206 		if (!of_property_read_u32(node, "ti,gain", &pval)) {  in ads1015_get_channels_config_of()
207 			pga = pval;  in ads1015_get_channels_config_of()
208 			if (pga > 6) {  in ads1015_get_channels_config_of()
209 				dev_err(&client->dev, "invalid gain on %pOF\n",  in ads1015_get_channels_config_of()
211 				return -EINVAL;  in ads1015_get_channels_config_of()
218 				dev_err(&client->dev,  in ads1015_get_channels_config_of()
220 				return -EINVAL;  in ads1015_get_channels_config_of()
224 		data->channel_data[channel].enabled = true;  in ads1015_get_channels_config_of()
225 		data->channel_data[channel].pga = pga;  in ads1015_get_channels_config_of()
226 		data->channel_data[channel].data_rate = data_rate;  in ads1015_get_channels_config_of()
237 	struct ads1015_platform_data *pdata = dev_get_platdata(&client->dev);  in ads1015_get_channels_config()
241 		memcpy(data->channel_data, pdata->channel_data,  in ads1015_get_channels_config()
242 		       sizeof(data->channel_data));  in ads1015_get_channels_config()
253 		data->channel_data[k].enabled = true;  in ads1015_get_channels_config()
254 		data->channel_data[k].pga = ADS1015_DEFAULT_PGA;  in ads1015_get_channels_config()
255 		data->channel_data[k].data_rate = ADS1015_DEFAULT_DATA_RATE;  in ads1015_get_channels_config()
266 	data = devm_kzalloc(&client->dev, sizeof(struct ads1015_data),  in ads1015_probe()
269 		return -ENOMEM;  in ads1015_probe()
271 	if (client->dev.of_node)  in ads1015_probe()
272 		data->id = (enum ads1015_chips)  in ads1015_probe()
273 			of_device_get_match_data(&client->dev);  in ads1015_probe()
275 		data->id = id->driver_data;  in ads1015_probe()
277 	mutex_init(&data->update_lock);  in ads1015_probe()
282 		if (!data->channel_data[k].enabled)  in ads1015_probe()
284 		err = device_create_file(&client->dev, &ads1015_in[k].dev_attr);  in ads1015_probe()
289 	data->hwmon_dev = hwmon_device_register(&client->dev);  in ads1015_probe()
290 	if (IS_ERR(data->hwmon_dev)) {  in ads1015_probe()
291 		err = PTR_ERR(data->hwmon_dev);  in ads1015_probe()
299 		device_remove_file(&client->dev, &ads1015_in[k].dev_attr);  in ads1015_probe()