2  * iio/adc/max9611.c
4  * Maxim max9611/max9612 high side current sense amplifier with
17  * Maxim max9611/max9612.
30 #define DRIVER_NAME			"max9611"
32 /* max9611 register addresses */
39 /* max9611 REG1 mux configuration options */
47 /* max9611 voltage (both csa and input) helper macros */
52  * max9611 current sense amplifier voltage output:
72  * max9611 common input mode (CIM): LSB is 14mV, with 14mV offset at 25 C
81  * max9611 temperature reading: LSB is 480 milli degrees Celsius
221  * @max9611: max9611 device
225 static int max9611_read_single(struct max9611_dev *max9611,  in max9611_read_single()  argument
238 	mutex_lock(&max9611->lock);  in max9611_read_single()
239 	ret = i2c_smbus_write_byte_data(max9611->i2c_client,  in max9611_read_single()
242 		dev_err(max9611->dev, "i2c write byte failed: 0x%2x - 0x%2x\n",  in max9611_read_single()
244 		mutex_unlock(&max9611->lock);  in max9611_read_single()
252 	ret = i2c_smbus_read_word_swapped(max9611->i2c_client, reg_addr);  in max9611_read_single()
254 		dev_err(max9611->dev, "i2c read word from 0x%2x failed\n",  in max9611_read_single()
256 		mutex_unlock(&max9611->lock);  in max9611_read_single()
261 	mutex_unlock(&max9611->lock);  in max9611_read_single()
274  * @max9611: max9611 device
278 static int max9611_read_csa_voltage(struct max9611_dev *max9611,  in max9611_read_csa_voltage()  argument
291 		ret = max9611_read_single(max9611, gain_selectors[i], adc_raw);  in max9611_read_csa_voltage()
369 			 * Even if max9611 can output raw csa voltage readings,  in max9611_read_raw()
442 	struct max9611_dev *max9611 = iio_priv(dev_to_iio_dev(dev));  in max9611_shunt_resistor_show()  local
445 	i = max9611->shunt_resistor_uohm / 1000000;  in max9611_shunt_resistor_show()
446 	r = max9611->shunt_resistor_uohm % 1000000;  in max9611_shunt_resistor_show()
471 static int max9611_init(struct max9611_dev *max9611)  in max9611_init()  argument
473 	struct i2c_client *client = max9611->i2c_client;  in max9611_init()
480 		dev_err(max9611->dev,  in max9611_init()
486 	ret = max9611_read_single(max9611, CONF_TEMP, &regval);  in max9611_init()
495 		dev_err(max9611->dev,  in max9611_init()
502 	ret = i2c_smbus_write_byte_data(max9611->i2c_client,  in max9611_init()
505 		dev_err(max9611->dev, "i2c write byte failed: 0x%2x - 0x%2x\n",  in max9611_init()
510 	ret = i2c_smbus_write_byte_data(max9611->i2c_client,  in max9611_init()
513 		dev_err(max9611->dev, "i2c write byte failed: 0x%2x - 0x%2x\n",  in max9611_init()
523 	{.compatible = "maxim,max9611", .data = "max9611"},
536 	struct max9611_dev *max9611;  in max9611_probe()  local
541 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*max9611));  in max9611_probe()
547 	max9611			= iio_priv(indio_dev);  in max9611_probe()
548 	max9611->dev		= &client->dev;  in max9611_probe()
549 	max9611->i2c_client	= client;  in max9611_probe()
550 	mutex_init(&max9611->lock);  in max9611_probe()
559 	max9611->shunt_resistor_uohm = of_shunt;  in max9611_probe()
561 	ret = max9611_init(max9611);  in max9611_probe()
586 MODULE_DESCRIPTION("Maxim max9611/12 current sense amplifier with 12bit ADC");