On Mon, 17 Feb 2020 19:42:38 -0800
Matt Ranostay <matt.ranostay@xxxxxxxxxxxx> wrote:
> Atlas Scientific DO-SM OEM sensor reads disolved oxygen in
> a solution. This is reported back as mg/L which maps directly
> to ppm and so the IIO_CONCENTRATION channel type can be used.
>
> Signed-off-by: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with it.
Thanks,
Jonathan
> ---
> drivers/iio/chemical/atlas-sensor.c | 64 +++++++++++++++++++++++++++--
> 1 file changed, 60 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
> index d95818b74770..82d470561ad3 100644
> --- a/drivers/iio/chemical/atlas-sensor.c
> +++ b/drivers/iio/chemical/atlas-sensor.c
> @@ -48,6 +48,11 @@
> #define ATLAS_REG_EC_CALIB_STATUS_LOW BIT(2)
> #define ATLAS_REG_EC_CALIB_STATUS_HIGH BIT(3)
>
> +#define ATLAS_REG_DO_CALIB_STATUS 0x09
> +#define ATLAS_REG_DO_CALIB_STATUS_MASK 0x03
> +#define ATLAS_REG_DO_CALIB_STATUS_PRESSURE BIT(0)
> +#define ATLAS_REG_DO_CALIB_STATUS_DO BIT(1)
> +
> #define ATLAS_REG_PH_TEMP_DATA 0x0e
> #define ATLAS_REG_PH_DATA 0x16
>
> @@ -60,14 +65,19 @@
> #define ATLAS_REG_ORP_CALIB_STATUS 0x0d
> #define ATLAS_REG_ORP_DATA 0x0e
>
> +#define ATLAS_REG_DO_TEMP_DATA 0x12
> +#define ATLAS_REG_DO_DATA 0x22
> +
> #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
>
> enum {
> ATLAS_PH_SM,
> ATLAS_EC_SM,
> ATLAS_ORP_SM,
> + ATLAS_DO_SM,
> };
>
> struct atlas_data {
> @@ -122,7 +132,7 @@ static const struct iio_chan_spec atlas_ph_channels[] = {
> },
> };
>
> -#define ATLAS_EC_CHANNEL(_idx, _addr) \
> +#define ATLAS_CONCENTRATION_CHANNEL(_idx, _addr) \
> {\
> .type = IIO_CONCENTRATION, \
> .indexed = 1, \
> @@ -153,8 +163,8 @@ static const struct iio_chan_spec atlas_ec_channels[] = {
> .endianness = IIO_BE,
> },
> },
> - ATLAS_EC_CHANNEL(0, ATLAS_REG_TDS_DATA),
> - ATLAS_EC_CHANNEL(1, ATLAS_REG_PSS_DATA),
> + ATLAS_CONCENTRATION_CHANNEL(0, ATLAS_REG_TDS_DATA),
> + ATLAS_CONCENTRATION_CHANNEL(1, ATLAS_REG_PSS_DATA),
> IIO_CHAN_SOFT_TIMESTAMP(3),
> {
> .type = IIO_TEMP,
> @@ -183,6 +193,19 @@ static const struct iio_chan_spec atlas_orp_channels[] = {
> IIO_CHAN_SOFT_TIMESTAMP(1),
> };
>
> +static const struct iio_chan_spec atlas_do_channels[] = {
> + ATLAS_CONCENTRATION_CHANNEL(0, ATLAS_REG_DO_DATA),
> + IIO_CHAN_SOFT_TIMESTAMP(1),
> + {
> + .type = IIO_TEMP,
> + .address = ATLAS_REG_DO_TEMP_DATA,
> + .info_mask_separate =
> + BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
> + .output = 1,
> + .scan_index = -1
> + },
> +};
> +
> static int atlas_check_ph_calibration(struct atlas_data *data)
> {
> struct device *dev = &data->client->dev;
> @@ -263,7 +286,31 @@ static int atlas_check_orp_calibration(struct atlas_data *data)
> dev_warn(dev, "device has not been calibrated\n");
>
> return 0;
> -};
> +}
> +
> +static int atlas_check_do_calibration(struct atlas_data *data)
> +{
> + struct device *dev = &data->client->dev;
> + int ret;
> + unsigned int val;
> +
> + ret = regmap_read(data->regmap, ATLAS_REG_DO_CALIB_STATUS, &val);
> + if (ret)
> + return ret;
> +
> + if (!(val & ATLAS_REG_DO_CALIB_STATUS_MASK)) {
> + dev_warn(dev, "device has not been calibrated\n");
> + return 0;
> + }
> +
> + if (!(val & ATLAS_REG_DO_CALIB_STATUS_PRESSURE))
> + dev_warn(dev, "device missing atmospheric pressure calibration\n");
> +
> + if (!(val & ATLAS_REG_DO_CALIB_STATUS_DO))
> + dev_warn(dev, "device missing dissolved oxygen calibration\n");
> +
> + return 0;
> +}
>
> struct atlas_device {
> const struct iio_chan_spec *channels;
> @@ -296,6 +343,13 @@ static struct atlas_device atlas_devices[] = {
> .calibration = &atlas_check_orp_calibration,
> .delay = ATLAS_ORP_INT_TIME_IN_MS,
> },
> + [ATLAS_DO_SM] = {
> + .channels = atlas_do_channels,
> + .num_channels = 3,
> + .data_reg = ATLAS_REG_DO_DATA,
> + .calibration = &atlas_check_do_calibration,
> + .delay = ATLAS_DO_INT_TIME_IN_MS,
> + },
> };
>
> static int atlas_set_powermode(struct atlas_data *data, int on)
> @@ -511,6 +565,7 @@ static const struct i2c_device_id atlas_id[] = {
> { "atlas-ph-sm", ATLAS_PH_SM},
> { "atlas-ec-sm", ATLAS_EC_SM},
> { "atlas-orp-sm", ATLAS_ORP_SM},
> + { "atlas-do-sm", ATLAS_DO_SM},
> {}
> };
> MODULE_DEVICE_TABLE(i2c, atlas_id);
> @@ -519,6 +574,7 @@ static const struct of_device_id atlas_dt_ids[] = {
> { .compatible = "atlas,ph-sm", .data = (void *)ATLAS_PH_SM, },
> { .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, },
> { }
> };
> MODULE_DEVICE_TABLE(of, atlas_dt_ids);
