diff options
Diffstat (limited to 'drivers/iio/proximity/srf08.c')
| -rw-r--r-- | drivers/iio/proximity/srf08.c | 81 |
1 files changed, 63 insertions, 18 deletions
diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c index 1f9b03944da4..9380d545aab1 100644 --- a/drivers/iio/proximity/srf08.c +++ b/drivers/iio/proximity/srf08.c @@ -1,17 +1,18 @@ /* * srf08.c - Support for Devantech SRFxx ultrasonic ranger * with i2c interface - * actually supported are srf08, srf10 + * actually supported are srf02, srf08, srf10 * - * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de> + * Copyright (c) 2016, 2017 Andreas Klinger <ak@it-klinger.de> * * This file is subject to the terms and conditions of version 2 of - * the GNU General Public License. See the file COPYING in the main + * the GNU General Public License. See the file COPYING in the main * directory of this archive for more details. * * For details about the device see: * http://www.robot-electronics.co.uk/htm/srf08tech.html * http://www.robot-electronics.co.uk/htm/srf10tech.htm + * http://www.robot-electronics.co.uk/htm/srf02tech.htm */ #include <linux/err.h> @@ -36,9 +37,8 @@ #define SRF08_CMD_RANGING_CM 0x51 /* Ranging Mode - Result in cm */ -#define SRF08_DEFAULT_RANGE 6020 /* default value of Range in mm */ - enum srf08_sensor_type { + SRF02, SRF08, SRF10, SRF_MAX_TYPE @@ -48,6 +48,9 @@ struct srf08_chip_info { const int *sensitivity_avail; int num_sensitivity_avail; int sensitivity_default; + + /* default value of Range in mm */ + int range_default; }; struct srf08_data { @@ -83,6 +86,14 @@ struct srf08_data { * But with ADC's this term is already used differently and that's why it * is called "Sensitivity" here. */ +static const struct srf08_chip_info srf02_chip_info = { + .sensitivity_avail = NULL, + .num_sensitivity_avail = 0, + .sensitivity_default = 0, + + .range_default = 0, +}; + static const int srf08_sensitivity_avail[] = { 94, 97, 100, 103, 107, 110, 114, 118, 123, 128, 133, 139, 145, 152, 159, 168, @@ -94,6 +105,8 @@ static const struct srf08_chip_info srf08_chip_info = { .sensitivity_avail = srf08_sensitivity_avail, .num_sensitivity_avail = ARRAY_SIZE(srf08_sensitivity_avail), .sensitivity_default = 1025, + + .range_default = 6020, }; static const int srf10_sensitivity_avail[] = { @@ -106,6 +119,8 @@ static const struct srf08_chip_info srf10_chip_info = { .sensitivity_avail = srf10_sensitivity_avail, .num_sensitivity_avail = ARRAY_SIZE(srf10_sensitivity_avail), .sensitivity_default = 700, + + .range_default = 6020, }; static int srf08_read_ranging(struct srf08_data *data) @@ -424,6 +439,15 @@ static const struct iio_info srf08_info = { .driver_module = THIS_MODULE, }; +/* + * srf02 don't have an adjustable range or sensitivity, + * so we don't need attributes at all + */ +static const struct iio_info srf02_info = { + .read_raw = srf08_read_raw, + .driver_module = THIS_MODULE, +}; + static int srf08_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -447,11 +471,17 @@ static int srf08_probe(struct i2c_client *client, data->sensor_type = (enum srf08_sensor_type)id->driver_data; switch (data->sensor_type) { + case SRF02: + data->chip_info = &srf02_chip_info; + indio_dev->info = &srf02_info; + break; case SRF08: data->chip_info = &srf08_chip_info; + indio_dev->info = &srf08_info; break; case SRF10: data->chip_info = &srf10_chip_info; + indio_dev->info = &srf08_info; break; default: return -EINVAL; @@ -460,7 +490,6 @@ static int srf08_probe(struct i2c_client *client, indio_dev->name = id->name; indio_dev->dev.parent = &client->dev; indio_dev->modes = INDIO_DIRECT_MODE; - indio_dev->info = &srf08_info; indio_dev->channels = srf08_channels; indio_dev->num_channels = ARRAY_SIZE(srf08_channels); @@ -473,24 +502,39 @@ static int srf08_probe(struct i2c_client *client, return ret; } - /* - * set default values of device here - * these register values cannot be read from the hardware - * therefore set driver specific default values - */ - ret = srf08_write_range_mm(data, SRF08_DEFAULT_RANGE); - if (ret < 0) - return ret; + if (data->chip_info->range_default) { + /* + * set default range of device in mm here + * these register values cannot be read from the hardware + * therefore set driver specific default values + * + * srf02 don't have a default value so it'll be omitted + */ + ret = srf08_write_range_mm(data, + data->chip_info->range_default); + if (ret < 0) + return ret; + } - ret = srf08_write_sensitivity(data, + if (data->chip_info->sensitivity_default) { + /* + * set default sensitivity of device here + * these register values cannot be read from the hardware + * therefore set driver specific default values + * + * srf02 don't have a default value so it'll be omitted + */ + ret = srf08_write_sensitivity(data, data->chip_info->sensitivity_default); - if (ret < 0) - return ret; + if (ret < 0) + return ret; + } return devm_iio_device_register(&client->dev, indio_dev); } static const struct of_device_id of_srf08_match[] = { + { .compatible = "devantech,srf02", (void *)SRF02}, { .compatible = "devantech,srf08", (void *)SRF08}, { .compatible = "devantech,srf10", (void *)SRF10}, {}, @@ -499,6 +543,7 @@ static const struct of_device_id of_srf08_match[] = { MODULE_DEVICE_TABLE(of, of_srf08_match); static const struct i2c_device_id srf08_id[] = { + { "srf02", SRF02 }, { "srf08", SRF08 }, { "srf10", SRF10 }, { } @@ -516,5 +561,5 @@ static struct i2c_driver srf08_driver = { module_i2c_driver(srf08_driver); MODULE_AUTHOR("Andreas Klinger <ak@it-klinger.de>"); -MODULE_DESCRIPTION("Devantech SRF08/SRF10 ultrasonic ranger driver"); +MODULE_DESCRIPTION("Devantech SRF02/SRF08/SRF10 i2c ultrasonic ranger driver"); MODULE_LICENSE("GPL"); |