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[2a02:1810:a44c:8f00:cef1:93b4:727b:dd58]) by smtp.gmail.com with ESMTPSA id fi24-20020a1709073ad800b0072af4af2f46sm10148434ejc.74.2022.09.16.03.46.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Sep 2022 03:46:17 -0700 (PDT) From: cmo@melexis.com To: Jonathan Cameron Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Andy Shevchenko , Crt Mori Subject: [PATCH v4 2/3] iio: temperature: mlx90632 Read sampling frequency Date: Fri, 16 Sep 2022 12:45:51 +0200 Message-Id: <651b3659f574f9b17de34b774f94c895cbd00dfd.1663324968.git.cmo@melexis.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Crt Mori Allow users to read sensor sampling frequency to better plan the application measurement requests. Signed-off-by: Crt Mori --- drivers/iio/temperature/mlx90632.c | 59 ++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/m= lx90632.c index 80497d9bc4e9..e7946e3ed4fb 100644 --- a/drivers/iio/temperature/mlx90632.c +++ b/drivers/iio/temperature/mlx90632.c @@ -81,6 +81,9 @@ #define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuou= s */ =20 #define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */ +#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val) + /* Extract Refresh Rate from ee register */ +#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8) =20 /* Measurement types */ #define MLX90632_MTYP_MEDICAL 0 @@ -914,6 +917,32 @@ static int mlx90632_calc_ambient_dsp105(struct mlx9063= 2_data *data, int *val) return ret; } =20 +static int mlx90632_get_refresh_rate(struct mlx90632_data *data, + int *refresh_rate) +{ + unsigned int meas1; + int ret; + + ret =3D regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1); + if (ret < 0) + return ret; + + *refresh_rate =3D MLX90632_REFRESH_RATE(meas1); + + return ret; +} + +static const int mlx90632_freqs[][2] =3D { + {0, 500000}, + {1, 0}, + {2, 0}, + {4, 0}, + {8, 0}, + {16, 0}, + {32, 0}, + {64, 0} +}; + /** * mlx90632_pm_interraction_wakeup() - Measure time between user interacti= ons to change powermode * @data: pointer to mlx90632_data object containing interaction_ts inform= ation @@ -992,6 +1021,15 @@ static int mlx90632_read_raw(struct iio_dev *indio_de= v, *val =3D data->object_ambient_temperature; ret =3D IIO_VAL_INT; break; + case IIO_CHAN_INFO_SAMP_FREQ: + ret =3D mlx90632_get_refresh_rate(data, &cr); + if (ret < 0) + goto mlx90632_read_raw_pm; + + *val =3D mlx90632_freqs[cr][0]; + *val2 =3D mlx90632_freqs[cr][1]; + ret =3D IIO_VAL_INT_PLUS_MICRO; + break; default: ret =3D -EINVAL; break; @@ -1025,12 +1063,30 @@ static int mlx90632_write_raw(struct iio_dev *indio= _dev, } } =20 +static int mlx90632_read_avail(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + const int **vals, int *type, int *length, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_SAMP_FREQ: + *vals =3D (int *)mlx90632_freqs; + *type =3D IIO_VAL_INT_PLUS_MICRO; + *length =3D 2 * ARRAY_SIZE(mlx90632_freqs); + return IIO_AVAIL_LIST; + default: + return -EINVAL; + } +} + static const struct iio_chan_spec mlx90632_channels[] =3D { { .type =3D IIO_TEMP, .modified =3D 1, .channel2 =3D IIO_MOD_TEMP_AMBIENT, .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED), + .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), }, { .type =3D IIO_TEMP, @@ -1038,12 +1094,15 @@ static const struct iio_chan_spec mlx90632_channels= [] =3D { .channel2 =3D IIO_MOD_TEMP_OBJECT, .info_mask_separate =3D BIT(IIO_CHAN_INFO_PROCESSED) | BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT), + .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_shared_by_all_available =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), }, }; =20 static const struct iio_info mlx90632_info =3D { .read_raw =3D mlx90632_read_raw, .write_raw =3D mlx90632_write_raw, + .read_avail =3D mlx90632_read_avail, }; =20 static int mlx90632_sleep(struct mlx90632_data *data) --=20 2.34.1