Lines Matching +full:adc +full:- +full:delay +full:- +full:ms
1 // SPDX-License-Identifier: GPL-2.0-only
3 * ltc2485.c - Driver for Linear Technology LTC2485 ADC
10 #include <linux/delay.h>
17 /* Power-on configuration: rejects both 50/60Hz, operates at 1x speed */
27 const unsigned int conv_time = 147; /* conversion time ms */ in ltc2485_wait_conv()
30 /* delay if conversion time not passed since last read or write */ in ltc2485_wait_conv()
31 time_elapsed = ktime_ms_delta(ktime_get(), data->time_prev); in ltc2485_wait_conv()
34 msleep(conv_time - time_elapsed); in ltc2485_wait_conv()
39 struct i2c_client *client = data->client; in ltc2485_read()
47 dev_err(&client->dev, "i2c_master_recv failed\n"); in ltc2485_read()
50 data->time_prev = ktime_get(); in ltc2485_read()
76 return -EINVAL; in ltc2485_read_raw()
99 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C | in ltc2485_probe()
101 return -EOPNOTSUPP; in ltc2485_probe()
103 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); in ltc2485_probe()
105 return -ENOMEM; in ltc2485_probe()
109 data->client = client; in ltc2485_probe()
111 indio_dev->name = id->name; in ltc2485_probe()
112 indio_dev->info = <c2485_info; in ltc2485_probe()
113 indio_dev->modes = INDIO_DIRECT_MODE; in ltc2485_probe()
114 indio_dev->channels = ltc2485_channel; in ltc2485_probe()
115 indio_dev->num_channels = ARRAY_SIZE(ltc2485_channel); in ltc2485_probe()
117 ret = i2c_smbus_write_byte(data->client, LTC2485_CONFIG_DEFAULT); in ltc2485_probe()
121 data->time_prev = ktime_get(); in ltc2485_probe()
123 return devm_iio_device_register(&client->dev, indio_dev); in ltc2485_probe()
142 MODULE_DESCRIPTION("Linear Technology LTC2485 ADC driver");