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SubjectRe: [PATCH 2/7] iio: srf08: add sensor type srf10
On Thu, 3 Aug 2017 01:23:56 +0200
Andreas Klinger <ak@it-klinger.de> wrote:

> Ultrasonic sensor srf10 is quite similar to srf08 and now also supported by
> the driver as device tree compatible string.
>
> The most significiant difference is a different range and values of
> register gain (in the driver it's call sensitivity). Therefore the array of
> was extended.
>
> Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Minor issue inline. Otherwise looks fine.

Jonathan
> ---
> drivers/iio/proximity/srf08.c | 59 +++++++++++++++++++++++++++++++++++--------
> 1 file changed, 48 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/iio/proximity/srf08.c b/drivers/iio/proximity/srf08.c
> index 49316cbf7c60..350b5b0eb64e 100644
> --- a/drivers/iio/proximity/srf08.c
> +++ b/drivers/iio/proximity/srf08.c
> @@ -30,14 +30,23 @@
>
> #define SRF08_CMD_RANGING_CM 0x51 /* Ranging Mode - Result in cm */
>
> -#define SRF08_DEFAULT_GAIN 1025 /* default analogue value of Gain */
> +//#define SRF08_DEFAULT_GAIN 1025 /* default analogue value of Gain */
checkpatch.pl would have picked up on this. Don't leave random dead code
in here...
> #define SRF08_DEFAULT_RANGE 6020 /* default value of Range in mm */
>
> +#define SRF08_MAX_SENSITIVITY 32 /* number of Gain Register values */
> +
> +enum srf08_sensor_type {
> + SRF08,
> + SRF10,
> + SRF_MAX_TYPE
> +};
> +
> struct srf08_data {
> struct i2c_client *client;
> int sensitivity; /* Gain */
> int range_mm; /* max. Range in mm */
> struct mutex lock;
> + enum srf08_sensor_type sensor_type; /* Sensor-Type */
> };
>
> /*
> @@ -47,11 +56,29 @@ 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[SRF_MAX_TYPE][SRF08_MAX_SENSITIVITY] = {
> + /* SRF08 */
> + {
> 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
> + },
> + /* SRF10 */
> + {
> + 40, 40, 50, 60, 70, 80, 100, 120,
> + 140, 200, 250, 300, 350, 400, 500, 600,
> + 700, 0, 0, 0, 0, 0, 0, 0,
> + 0, 0, 0, 0, 0, 0, 0, 0,
> + },
> +};
> +
> +static const int srf08_default_sensitivity[SRF_MAX_TYPE] = {
> + /* SRF08 */
> + 1025,
> + /* SRF10 */
> + 700,
> +};
>
> static int srf08_read_ranging(struct srf08_data *data)
> {
> @@ -225,9 +252,13 @@ 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 < SRF08_MAX_SENSITIVITY; i++)
> + if (srf08_sensitivity[data->sensor_type][i])
> + len += sprintf(buf + len, "%d ",
> + srf08_sensitivity[data->sensor_type][i]);
>
> len += sprintf(buf + len, "\n");
>
> @@ -256,13 +287,16 @@ 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 < SRF08_MAX_SENSITIVITY; i++)
> + if (val == srf08_sensitivity[data->sensor_type][i]) {
> regval = i;
> break;
> }
>
> - if (i >= ARRAY_SIZE(srf08_sensitivity))
> + if (i >= SRF08_MAX_SENSITIVITY)
> return -EINVAL;
>
> mutex_lock(&data->lock);
> @@ -352,8 +386,9 @@ 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;
>
> - 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;
> @@ -371,7 +406,8 @@ 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,
> + srf08_default_sensitivity[id->driver_data]);
> if (ret < 0)
> return ret;
>
> @@ -379,7 +415,8 @@ static int srf08_probe(struct i2c_client *client,
> }
>
> static const struct i2c_device_id srf08_id[] = {
> - { "srf08", 0 },
> + { "srf08", SRF08 },
> + { "srf10", SRF10 },
> { }
> };
> MODULE_DEVICE_TABLE(i2c, srf08_id);

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