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Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Laxman Dewangan Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] dt-bindings: thermal: generic-adc: Add optional io-channel-cells property Date: Wed, 19 Feb 2025 10:28:16 +0200 Message-ID: <20250219082817.56339-2-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250219082817.56339-1-clamor95@gmail.com> References: <20250219082817.56339-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Since device is a thermal sensor it needs '#io-channel-cells' to allow exposure of thermal data via IIO means. Signed-off-by: Svyatoslav Ryhel --- .../devicetree/bindings/thermal/generic-adc-thermal.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml b/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml index 12e6418dc24d..4bc2cff0593c 100644 --- a/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml +++ b/Documentation/devicetree/bindings/thermal/generic-adc-thermal.yaml @@ -30,6 +30,9 @@ properties: io-channel-names: const: sensor-channel + '#io-channel-cells': + const: 1 + temperature-lookup-table: description: | Lookup table to map the relation between ADC value and temperature. @@ -60,6 +63,7 @@ examples: #thermal-sensor-cells = <0>; io-channels = <&ads1015 1>; io-channel-names = "sensor-channel"; + #io-channel-cells = <1>; temperature-lookup-table = < (-40000) 2578 (-39000) 2577 From patchwork Wed Feb 19 08:28:17 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Svyatoslav Ryhel X-Patchwork-Id: 13981711 X-Patchwork-Delegate: daniel.lezcano@linaro.org Received: from mail-lf1-f45.google.com (mail-lf1-f45.google.com [209.85.167.45]) (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 6F3171C5F30; 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([188.163.112.51]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-30a2699d0f5sm12645911fa.78.2025.02.19.00.28.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 19 Feb 2025 00:28:40 -0800 (PST) From: Svyatoslav Ryhel To: "Rafael J. Wysocki" , Daniel Lezcano , Zhang Rui , Lukasz Luba , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Laxman Dewangan Cc: linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] thermal: thermal-generic-adc: add temperature sensor channel Date: Wed, 19 Feb 2025 10:28:17 +0200 Message-ID: <20250219082817.56339-3-clamor95@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250219082817.56339-1-clamor95@gmail.com> References: <20250219082817.56339-1-clamor95@gmail.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add IIO sensor channel along with existing thermal sensor cell. This would benefit devices that use adc sensors to detect temperature and need a custom conversion table. Signed-off-by: Svyatoslav Ryhel --- drivers/thermal/thermal-generic-adc.c | 54 ++++++++++++++++++++++++++- 1 file changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/thermal-generic-adc.c b/drivers/thermal/thermal-generic-adc.c index ee3d0aa31406..a8f3b965b39b 100644 --- a/drivers/thermal/thermal-generic-adc.c +++ b/drivers/thermal/thermal-generic-adc.c @@ -7,6 +7,7 @@ * Author: Laxman Dewangan */ #include +#include #include #include #include @@ -73,6 +74,57 @@ static const struct thermal_zone_device_ops gadc_thermal_ops = { .get_temp = gadc_thermal_get_temp, }; +static const struct iio_chan_spec gadc_thermal_iio_channel[] = { + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), + } +}; + +static int gadc_thermal_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *temp, int *val2, long mask) +{ + struct gadc_thermal_info *gtinfo = iio_priv(indio_dev); + int ret; + + if (mask != IIO_CHAN_INFO_PROCESSED) + return -EINVAL; + + ret = gadc_thermal_get_temp(gtinfo->tz_dev, temp); + if (ret < 0) + return ret; + + *temp /= 1000; + + return IIO_VAL_INT; +} + +static const struct iio_info gadc_thermal_iio_info = { + .read_raw = gadc_thermal_read_raw, +}; + +static int gadc_iio_register(struct device *dev, struct gadc_thermal_info *gti) +{ + struct gadc_thermal_info *gtinfo; + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(dev, sizeof(struct gadc_thermal_info)); + if (!indio_dev) + return -ENOMEM; + + gtinfo = iio_priv(indio_dev); + memcpy(gtinfo, gti, sizeof(struct gadc_thermal_info)); + + indio_dev->name = dev_name(dev); + indio_dev->info = &gadc_thermal_iio_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = gadc_thermal_iio_channel; + indio_dev->num_channels = ARRAY_SIZE(gadc_thermal_iio_channel); + + return devm_iio_device_register(dev, indio_dev); +} + static int gadc_thermal_read_linear_lookup_table(struct device *dev, struct gadc_thermal_info *gti) { @@ -153,7 +205,7 @@ static int gadc_thermal_probe(struct platform_device *pdev) devm_thermal_add_hwmon_sysfs(dev, gti->tz_dev); - return 0; + return gadc_iio_register(&pdev->dev, gti); } static const struct of_device_id of_adc_thermal_match[] = {