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-rw-r--r--drivers/iio/proximity/Kconfig8
-rw-r--r--drivers/iio/proximity/srf08.c81
2 files changed, 67 insertions, 22 deletions
diff --git a/drivers/iio/proximity/Kconfig b/drivers/iio/proximity/Kconfig
index df33ccc0d035..ae070950f920 100644
--- a/drivers/iio/proximity/Kconfig
+++ b/drivers/iio/proximity/Kconfig
@@ -57,12 +57,12 @@ config SX9500
module will be called sx9500.
config SRF08
- tristate "Devantech SRF08/SRF10 ultrasonic ranger sensor"
+ tristate "Devantech SRF02/SRF08/SRF10 ultrasonic ranger sensor"
depends on I2C
help
- Say Y here to build a driver for Devantech SRF08/SRF10 ultrasonic
- ranger sensor. This driver can be used to measure the distance
- of objects.
+ Say Y here to build a driver for Devantech SRF02/SRF08/SRF10
+ ultrasonic ranger sensors with i2c interface.
+ This driver can be used to measure the distance of objects.
To compile this driver as a module, choose M here: the
module will be called srf08.
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");