On Sun, 19 Apr 2020, Matt Ranostay wrote:
> Atlas Scientific RTD-SM OEM sensor reads temperate using
reads temperature?
> resistance temperature detector technology.
>
> Signed-off-by: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
> ---
> drivers/iio/chemical/atlas-sensor.c | 28 ++++++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
> index 82d470561ad3..c7ed9004cf82 100644
> --- a/drivers/iio/chemical/atlas-sensor.c
> +++ b/drivers/iio/chemical/atlas-sensor.c
> @@ -68,16 +68,20 @@
> #define ATLAS_REG_DO_TEMP_DATA 0x12
> #define ATLAS_REG_DO_DATA 0x22
>
> +#define ATLAS_REG_RTD_DATA 0x0e
maybe keep registers in ascending order
> +
> #define ATLAS_PH_INT_TIME_IN_MS 450
> #define ATLAS_EC_INT_TIME_IN_MS 650
> #define ATLAS_ORP_INT_TIME_IN_MS 450
> #define ATLAS_DO_INT_TIME_IN_MS 450
> +#define ATLAS_RTD_INT_TIME_IN_MS 450
>
> enum {
> ATLAS_PH_SM,
> ATLAS_EC_SM,
> ATLAS_ORP_SM,
> ATLAS_DO_SM,
> + ATLAS_RTD_SM,
> };
>
> struct atlas_data {
> @@ -206,6 +210,22 @@ static const struct iio_chan_spec atlas_do_channels[] = {
> },
> };
>
> +static const struct iio_chan_spec atlas_rtd_channels[] = {
> + {
> + .type = IIO_TEMP,
> + .address = ATLAS_REG_RTD_DATA,
> + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> + .scan_index = 0,
> + .scan_type = {
> + .sign = 'u',
so this thing can't read negative temperature?
> + .realbits = 32,
> + .storagebits = 32,
> + .endianness = IIO_BE,
_PROCESSED, but still stored as big endian? hm
> + },
> + },
> + IIO_CHAN_SOFT_TIMESTAMP(1),
> +};
> +
> static int atlas_check_ph_calibration(struct atlas_data *data)
> {
> struct device *dev = &data->client->dev;
> @@ -350,6 +370,12 @@ static struct atlas_device atlas_devices[] = {
> .calibration = &atlas_check_do_calibration,
> .delay = ATLAS_DO_INT_TIME_IN_MS,
> },
> + [ATLAS_RTD_SM] = {
> + .channels = atlas_rtd_channels,
> + .num_channels = 2,
> + .data_reg = ATLAS_REG_RTD_DATA,
> + .delay = ATLAS_RTD_INT_TIME_IN_MS,
> + },
> };
>
> static int atlas_set_powermode(struct atlas_data *data, int on)
> @@ -566,6 +592,7 @@ static const struct i2c_device_id atlas_id[] = {
> { "atlas-ec-sm", ATLAS_EC_SM},
> { "atlas-orp-sm", ATLAS_ORP_SM},
> { "atlas-do-sm", ATLAS_DO_SM},
> + { "atlas-rtd-sm", ATLAS_RTD_SM},
> {}
> };
> MODULE_DEVICE_TABLE(i2c, atlas_id);
> @@ -575,6 +602,7 @@ static const struct of_device_id atlas_dt_ids[] = {
> { .compatible = "atlas,ec-sm", .data = (void *)ATLAS_EC_SM, },
> { .compatible = "atlas,orp-sm", .data = (void *)ATLAS_ORP_SM, },
> { .compatible = "atlas,do-sm", .data = (void *)ATLAS_DO_SM, },
> + { .compatible = "atlas,rtd-sm", .data = (void *)ATLAS_RTD_SM, },
> { }
> };
> MODULE_DEVICE_TABLE(of, atlas_dt_ids);
>
--
Peter Meerwald-Stadler
Mobile: +43 664 24 44 418
