diff options
Diffstat (limited to 'drivers/iio/proximity/srf08.c')
| -rw-r--r-- | drivers/iio/proximity/srf08.c | 90 |
1 files changed, 75 insertions, 15 deletions
diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c index de699d67310a..1f9b03944da4 100644 --- a/drivers/iio/proximity/srf08.c +++ b/drivers/iio/proximity/srf08.c @@ -1,5 +1,7 @@ /* - * srf08.c - Support for Devantech SRF08 ultrasonic ranger + * srf08.c - Support for Devantech SRFxx ultrasonic ranger + * with i2c interface + * actually supported are srf08, srf10 * * Copyright (c) 2016 Andreas Klinger <ak@it-klinger.de> * @@ -9,6 +11,7 @@ * * For details about the device see: * http://www.robot-electronics.co.uk/htm/srf08tech.html + * http://www.robot-electronics.co.uk/htm/srf10tech.htm */ #include <linux/err.h> @@ -33,9 +36,20 @@ #define SRF08_CMD_RANGING_CM 0x51 /* Ranging Mode - Result in cm */ -#define SRF08_DEFAULT_GAIN 1025 /* default analogue value of Gain */ #define SRF08_DEFAULT_RANGE 6020 /* default value of Range in mm */ +enum srf08_sensor_type { + SRF08, + SRF10, + SRF_MAX_TYPE +}; + +struct srf08_chip_info { + const int *sensitivity_avail; + int num_sensitivity_avail; + int sensitivity_default; +}; + struct srf08_data { struct i2c_client *client; @@ -54,6 +68,12 @@ struct srf08_data { * 1x16-bit channel + 3x16 padding + 4x16 timestamp */ s16 buffer[8]; + + /* Sensor-Type */ + enum srf08_sensor_type sensor_type; + + /* Chip-specific information */ + const struct srf08_chip_info *chip_info; }; /* @@ -63,11 +83,30 @@ struct srf08_data { * But with ADC's this term is already used differently and that's why it * is called "Sensitivity" here. */ -static const int srf08_sensitivity[] = { +static const int srf08_sensitivity_avail[] = { 94, 97, 100, 103, 107, 110, 114, 118, 123, 128, 133, 139, 145, 152, 159, 168, 177, 187, 199, 212, 227, 245, 265, 288, - 317, 352, 395, 450, 524, 626, 777, 1025 }; + 317, 352, 395, 450, 524, 626, 777, 1025 + }; + +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, +}; + +static const int srf10_sensitivity_avail[] = { + 40, 40, 50, 60, 70, 80, 100, 120, + 140, 200, 250, 300, 350, 400, 500, 600, + 700, + }; + +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, +}; static int srf08_read_ranging(struct srf08_data *data) { @@ -264,9 +303,13 @@ static ssize_t srf08_show_sensitivity_available(struct device *dev, struct device_attribute *attr, char *buf) { int i, len = 0; + struct iio_dev *indio_dev = dev_to_iio_dev(dev); + struct srf08_data *data = iio_priv(indio_dev); - for (i = 0; i < ARRAY_SIZE(srf08_sensitivity); i++) - len += sprintf(buf + len, "%d ", srf08_sensitivity[i]); + for (i = 0; i < data->chip_info->num_sensitivity_avail; i++) + if (data->chip_info->sensitivity_avail[i]) + len += sprintf(buf + len, "%d ", + data->chip_info->sensitivity_avail[i]); len += sprintf(buf + len, "\n"); @@ -295,19 +338,21 @@ static ssize_t srf08_write_sensitivity(struct srf08_data *data, int ret, i; u8 regval; - for (i = 0; i < ARRAY_SIZE(srf08_sensitivity); i++) - if (val == srf08_sensitivity[i]) { + if (!val) + return -EINVAL; + + for (i = 0; i < data->chip_info->num_sensitivity_avail; i++) + if (val && (val == data->chip_info->sensitivity_avail[i])) { regval = i; break; } - if (i >= ARRAY_SIZE(srf08_sensitivity)) + if (i >= data->chip_info->num_sensitivity_avail) return -EINVAL; mutex_lock(&data->lock); - ret = i2c_smbus_write_byte_data(client, - SRF08_WRITE_MAX_GAIN, regval); + ret = i2c_smbus_write_byte_data(client, SRF08_WRITE_MAX_GAIN, regval); if (ret < 0) { dev_err(&client->dev, "write_sensitivity - err: %d\n", ret); mutex_unlock(&data->lock); @@ -399,8 +444,20 @@ static int srf08_probe(struct i2c_client *client, data = iio_priv(indio_dev); i2c_set_clientdata(client, indio_dev); data->client = client; + data->sensor_type = (enum srf08_sensor_type)id->driver_data; + + switch (data->sensor_type) { + case SRF08: + data->chip_info = &srf08_chip_info; + break; + case SRF10: + data->chip_info = &srf10_chip_info; + break; + default: + return -EINVAL; + } - indio_dev->name = "srf08"; + indio_dev->name = id->name; indio_dev->dev.parent = &client->dev; indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &srf08_info; @@ -425,7 +482,8 @@ static int srf08_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = srf08_write_sensitivity(data, SRF08_DEFAULT_GAIN); + ret = srf08_write_sensitivity(data, + data->chip_info->sensitivity_default); if (ret < 0) return ret; @@ -433,14 +491,16 @@ static int srf08_probe(struct i2c_client *client, } static const struct of_device_id of_srf08_match[] = { - { .compatible = "devantech,srf08", 0}, + { .compatible = "devantech,srf08", (void *)SRF08}, + { .compatible = "devantech,srf10", (void *)SRF10}, {}, }; MODULE_DEVICE_TABLE(of, of_srf08_match); static const struct i2c_device_id srf08_id[] = { - { "srf08", 0 }, + { "srf08", SRF08 }, + { "srf10", SRF10 }, { } }; MODULE_DEVICE_TABLE(i2c, srf08_id); |