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96 lines
2.3 KiB
96 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Azoteq IQS620AT Temperature Sensor |
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* |
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* Copyright (C) 2019 Jeff LaBundy <[email protected]> |
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*/ |
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#include <linux/device.h> |
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#include <linux/iio/iio.h> |
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#include <linux/kernel.h> |
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#include <linux/mfd/iqs62x.h> |
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#include <linux/module.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#define IQS620_TEMP_UI_OUT 0x1A |
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#define IQS620_TEMP_SCALE 1000 |
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#define IQS620_TEMP_OFFSET (-100) |
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static int iqs620_temp_read_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int *val, int *val2, long mask) |
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{ |
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struct iqs62x_core *iqs62x = iio_device_get_drvdata(indio_dev); |
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int ret; |
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__le16 val_buf; |
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switch (mask) { |
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case IIO_CHAN_INFO_RAW: |
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ret = regmap_raw_read(iqs62x->regmap, IQS620_TEMP_UI_OUT, |
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&val_buf, sizeof(val_buf)); |
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if (ret) |
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return ret; |
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*val = le16_to_cpu(val_buf); |
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return IIO_VAL_INT; |
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case IIO_CHAN_INFO_SCALE: |
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*val = IQS620_TEMP_SCALE; |
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return IIO_VAL_INT; |
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case IIO_CHAN_INFO_OFFSET: |
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*val = IQS620_TEMP_OFFSET; |
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return IIO_VAL_INT; |
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default: |
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return -EINVAL; |
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} |
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} |
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static const struct iio_info iqs620_temp_info = { |
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.read_raw = &iqs620_temp_read_raw, |
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}; |
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static const struct iio_chan_spec iqs620_temp_channels[] = { |
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{ |
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.type = IIO_TEMP, |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
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BIT(IIO_CHAN_INFO_SCALE) | |
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BIT(IIO_CHAN_INFO_OFFSET), |
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}, |
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}; |
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static int iqs620_temp_probe(struct platform_device *pdev) |
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{ |
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struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); |
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struct iio_dev *indio_dev; |
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indio_dev = devm_iio_device_alloc(&pdev->dev, 0); |
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if (!indio_dev) |
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return -ENOMEM; |
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iio_device_set_drvdata(indio_dev, iqs62x); |
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indio_dev->modes = INDIO_DIRECT_MODE; |
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indio_dev->channels = iqs620_temp_channels; |
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indio_dev->num_channels = ARRAY_SIZE(iqs620_temp_channels); |
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indio_dev->name = iqs62x->dev_desc->dev_name; |
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indio_dev->info = &iqs620_temp_info; |
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return devm_iio_device_register(&pdev->dev, indio_dev); |
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} |
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static struct platform_driver iqs620_temp_platform_driver = { |
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.driver = { |
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.name = "iqs620at-temp", |
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}, |
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.probe = iqs620_temp_probe, |
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}; |
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module_platform_driver(iqs620_temp_platform_driver); |
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MODULE_AUTHOR("Jeff LaBundy <[email protected]>"); |
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MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor"); |
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MODULE_LICENSE("GPL"); |
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MODULE_ALIAS("platform:iqs620at-temp");
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