Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Azoteq IQS620AT Temperature Sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mfd/iqs62x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define IQS620_TEMP_UI_OUT			0x1A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #define IQS620_TEMP_SCALE			1000
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #define IQS620_TEMP_OFFSET			(-100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) static int iqs620_temp_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 				struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 				int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	struct iqs62x_core *iqs62x = iio_device_get_drvdata(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	__le16 val_buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		ret = regmap_raw_read(iqs62x->regmap, IQS620_TEMP_UI_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 				      &val_buf, sizeof(val_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		*val = le16_to_cpu(val_buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		*val = IQS620_TEMP_SCALE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	case IIO_CHAN_INFO_OFFSET:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		*val = IQS620_TEMP_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static const struct iio_info iqs620_temp_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 	.read_raw = &iqs620_temp_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static const struct iio_chan_spec iqs620_temp_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		.type = IIO_TEMP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 				      BIT(IIO_CHAN_INFO_SCALE) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 				      BIT(IIO_CHAN_INFO_OFFSET),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int iqs620_temp_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	indio_dev = devm_iio_device_alloc(&pdev->dev, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 	iio_device_set_drvdata(indio_dev, iqs62x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	indio_dev->channels = iqs620_temp_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	indio_dev->num_channels = ARRAY_SIZE(iqs620_temp_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 	indio_dev->name = iqs62x->dev_desc->dev_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	indio_dev->info = &iqs620_temp_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	return devm_iio_device_register(&pdev->dev, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static struct platform_driver iqs620_temp_platform_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 		.name = "iqs620at-temp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) 	.probe = iqs620_temp_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) module_platform_driver(iqs620_temp_platform_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) MODULE_ALIAS("platform:iqs620at-temp");