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The device features a "data ready" interrupt line which is pulled down once a new measurement is ready to be read. Signed-off-by: Antoni Pokusinski --- drivers/iio/temperature/Kconfig | 2 + drivers/iio/temperature/tmp006.c | 134 ++++++++++++++++++++++++++++--- 2 files changed, 123 insertions(+), 13 deletions(-) diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kcon= fig index ed0e4963362f..1244d8e17d50 100644 --- a/drivers/iio/temperature/Kconfig +++ b/drivers/iio/temperature/Kconfig @@ -91,6 +91,8 @@ config MLX90635 config TMP006 tristate "TMP006 infrared thermopile sensor" depends on I2C + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER help If you say yes here you get support for the Texas Instruments TMP006 infrared thermopile sensor. diff --git a/drivers/iio/temperature/tmp006.c b/drivers/iio/temperature/tmp= 006.c index 6d8d661f0c82..0c844137d7aa 100644 --- a/drivers/iio/temperature/tmp006.c +++ b/drivers/iio/temperature/tmp006.c @@ -7,8 +7,6 @@ * Driver for the Texas Instruments I2C 16-bit IR thermopile sensor * * (7-bit I2C slave address 0x40, changeable via ADR pins) - * - * TODO: data ready irq */ =20 #include @@ -21,6 +19,9 @@ =20 #include #include +#include +#include +#include =20 #define TMP006_VOBJECT 0x00 #define TMP006_TAMBIENT 0x01 @@ -45,6 +46,7 @@ struct tmp006_data { struct i2c_client *client; u16 config; + struct iio_trigger *drdy_trig; }; =20 static int tmp006_read_measurement(struct tmp006_data *data, u8 reg) @@ -83,15 +85,19 @@ static int tmp006_read_raw(struct iio_dev *indio_dev, case IIO_CHAN_INFO_RAW: if (channel->type =3D=3D IIO_VOLTAGE) { /* LSB is 156.25 nV */ - ret =3D tmp006_read_measurement(data, TMP006_VOBJECT); - if (ret < 0) - return ret; + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + ret =3D tmp006_read_measurement(data, TMP006_VOBJECT); + if (ret < 0) + return ret; + } *val =3D sign_extend32(ret, 15); } else if (channel->type =3D=3D IIO_TEMP) { /* LSB is 0.03125 degrees Celsius */ - ret =3D tmp006_read_measurement(data, TMP006_TAMBIENT); - if (ret < 0) - return ret; + iio_device_claim_direct_scoped(return -EBUSY, indio_dev) { + ret =3D tmp006_read_measurement(data, TMP006_TAMBIENT); + if (ret < 0) + return ret; + } *val =3D sign_extend32(ret, 15) >> TMP006_TAMBIENT_SHIFT; } else { break; @@ -128,7 +134,7 @@ static int tmp006_write_raw(struct iio_dev *indio_dev, long mask) { struct tmp006_data *data =3D iio_priv(indio_dev); - int i; + int ret, i; =20 if (mask !=3D IIO_CHAN_INFO_SAMP_FREQ) return -EINVAL; @@ -136,13 +142,19 @@ static int tmp006_write_raw(struct iio_dev *indio_dev, for (i =3D 0; i < ARRAY_SIZE(tmp006_freqs); i++) if ((val =3D=3D tmp006_freqs[i][0]) && (val2 =3D=3D tmp006_freqs[i][1])) { + ret =3D iio_device_claim_direct_mode(indio_dev); + if (ret) + return ret; + data->config &=3D ~TMP006_CONFIG_CR_MASK; data->config |=3D i << TMP006_CONFIG_CR_SHIFT; =20 - return i2c_smbus_write_word_swapped(data->client, - TMP006_CONFIG, - data->config); + ret =3D i2c_smbus_write_word_swapped(data->client, + TMP006_CONFIG, + data->config); =20 + iio_device_release_direct_mode(indio_dev); + return ret; } return -EINVAL; } @@ -164,13 +176,29 @@ static const struct iio_chan_spec tmp006_channels[] = =3D { .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), + .scan_index =3D 0, + .scan_type =3D { + .sign =3D 's', + .realbits =3D 16, + .storagebits =3D 16, + .endianness =3D IIO_BE, + } }, { .type =3D IIO_TEMP, .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), .info_mask_shared_by_all =3D BIT(IIO_CHAN_INFO_SAMP_FREQ), - } + .scan_index =3D 1, + .scan_type =3D { + .sign =3D 's', + .realbits =3D 14, + .storagebits =3D 16, + .shift =3D TMP006_TAMBIENT_SHIFT, + .endianness =3D IIO_BE, + } + }, + IIO_CHAN_SOFT_TIMESTAMP(2), }; =20 static const struct iio_info tmp006_info =3D { @@ -213,6 +241,54 @@ static void tmp006_powerdown_cleanup(void *dev) tmp006_power(dev, false); } =20 +static irqreturn_t tmp006_trigger_handler(int irq, void *p) +{ + struct iio_poll_func *pf =3D p; + struct iio_dev *indio_dev =3D pf->indio_dev; + struct tmp006_data *data =3D iio_priv(indio_dev); + struct { + s16 channels[2]; + s64 ts __aligned(8); + } scan; + s32 ret; + + ret =3D i2c_smbus_read_word_data(data->client, TMP006_VOBJECT); + if (ret < 0) + goto err; + scan.channels[0] =3D ret; + + ret =3D i2c_smbus_read_word_data(data->client, TMP006_TAMBIENT); + if (ret < 0) + goto err; + scan.channels[1] =3D ret; + + iio_push_to_buffers_with_timestamp(indio_dev, &scan, + iio_get_time_ns(indio_dev)); +err: + iio_trigger_notify_done(indio_dev->trig); + return IRQ_HANDLED; +} + +static int tmp006_set_trigger_state(struct iio_trigger *trig, bool state) +{ + struct iio_dev *indio_dev =3D iio_trigger_get_drvdata(trig); + struct tmp006_data *data =3D iio_priv(indio_dev); + + if (state) + data->config |=3D TMP006_CONFIG_DRDY_EN; + else + data->config &=3D ~TMP006_CONFIG_DRDY_EN; + + return i2c_smbus_write_word_swapped(data->client, TMP006_CONFIG, + data->config); +} + +static const struct iio_trigger_ops tmp006_trigger_ops =3D { + .set_trigger_state =3D tmp006_set_trigger_state, +}; + +static const unsigned long tmp006_scan_masks[] =3D { 0x3, 0 }; + static int tmp006_probe(struct i2c_client *client) { struct iio_dev *indio_dev; @@ -241,6 +317,7 @@ static int tmp006_probe(struct i2c_client *client) =20 indio_dev->channels =3D tmp006_channels; indio_dev->num_channels =3D ARRAY_SIZE(tmp006_channels); + indio_dev->available_scan_masks =3D tmp006_scan_masks; =20 ret =3D i2c_smbus_read_word_swapped(data->client, TMP006_CONFIG); if (ret < 0) @@ -258,6 +335,37 @@ static int tmp006_probe(struct i2c_client *client) if (ret < 0) return ret; =20 + if (client->irq > 0) { + data->drdy_trig =3D devm_iio_trigger_alloc(&client->dev, + "%s-dev%d", + indio_dev->name, + iio_device_id(indio_dev)); + if (!data->drdy_trig) + return -ENOMEM; + + data->drdy_trig->ops =3D &tmp006_trigger_ops; + iio_trigger_set_drvdata(data->drdy_trig, indio_dev); + ret =3D iio_trigger_register(data->drdy_trig); + if (ret) + return ret; + + indio_dev->trig =3D iio_trigger_get(data->drdy_trig); + + ret =3D devm_request_threaded_irq(&client->dev, client->irq, + iio_trigger_generic_data_rdy_poll, + NULL, + IRQF_ONESHOT, + "tmp006_irq", + data->drdy_trig); + if (ret < 0) + return ret; + } + + ret =3D devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, + tmp006_trigger_handler, NULL); + if (ret < 0) + return ret; + return devm_iio_device_register(&client->dev, indio_dev); } =20 --=20 2.25.1 From nobody Sat Nov 30 16:21:27 2024 Received: from mail-ej1-f46.google.com (mail-ej1-f46.google.com [209.85.218.46]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 01F34175D38; Sun, 8 Sep 2024 17:23:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Sun, 08 Sep 2024 10:23:02 -0700 (PDT) Received: from localhost.localdomain ([78.210.149.157]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a8d25c61258sm228048066b.116.2024.09.08.10.23.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 08 Sep 2024 10:23:02 -0700 (PDT) From: Antoni Pokusinski To: jic23@kernel.org, lars@metafoo.de, robh@kernel.org, krzk+dt@kernel.org Cc: pmeerw@pmeerw.net, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Antoni Pokusinski Subject: [PATCH v2 2/2] dt-bindings: iio: temperature: tmp006: document interrupt Date: Sun, 8 Sep 2024 19:21:55 +0200 Message-Id: <20240908172153.177406-3-apokusinski01@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240908172153.177406-1-apokusinski01@gmail.com> References: <20240908172153.177406-1-apokusinski01@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" TMP006 sensor has a DRDY (data ready) active-low interrupt which indicates that a new measurement is ready to be read. Signed-off-by: Antoni Pokusinski Reviewed-by: Krzysztof Kozlowski --- .../devicetree/bindings/iio/temperature/ti,tmp006.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/temperature/ti,tmp006.ya= ml b/Documentation/devicetree/bindings/iio/temperature/ti,tmp006.yaml index d43002b9bfdc..590f50ba3a31 100644 --- a/Documentation/devicetree/bindings/iio/temperature/ti,tmp006.yaml +++ b/Documentation/devicetree/bindings/iio/temperature/ti,tmp006.yaml @@ -23,6 +23,9 @@ properties: vdd-supply: description: provide VDD power to the sensor. =20 + interrupts: + maxItems: 1 + required: - compatible - reg @@ -31,6 +34,7 @@ additionalProperties: false =20 examples: - | + #include i2c { #address-cells =3D <1>; #size-cells =3D <0>; @@ -38,5 +42,7 @@ examples: compatible =3D "ti,tmp006"; reg =3D <0x40>; vdd-supply =3D <&ldo4_reg>; + interrupt-parent =3D <&gpio1>; + interrupts =3D <4 IRQ_TYPE_EDGE_FALLING>; }; }; --=20 2.25.1