diff options
Diffstat (limited to 'drivers/thermal/thermal-generic-adc.c')
| -rw-r--r-- | drivers/thermal/thermal-generic-adc.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/drivers/thermal/thermal-generic-adc.c b/drivers/thermal/thermal-generic-adc.c index ee3d0aa31406..7c844589b153 100644 --- a/drivers/thermal/thermal-generic-adc.c +++ b/drivers/thermal/thermal-generic-adc.c @@ -7,6 +7,7 @@ * Author: Laxman Dewangan <ldewangan@nvidia.com> */ #include <linux/iio/consumer.h> +#include <linux/iio/iio.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -73,6 +74,58 @@ 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_channels[] = { + { + .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 *val, int *val2, long mask) +{ + struct gadc_thermal_info *gtinfo = iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_PROCESSED: + ret = gadc_thermal_get_temp(gtinfo->tz_dev, val); + if (ret) + return ret; + + return IIO_VAL_INT; + + default: + return -EINVAL; + } +} + +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(*gtinfo)); + if (!indio_dev) + return -ENOMEM; + + gtinfo = iio_priv(indio_dev); + memcpy(gtinfo, gti, sizeof(*gtinfo)); + + 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_channels; + indio_dev->num_channels = ARRAY_SIZE(gadc_thermal_iio_channels); + + 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 +206,7 @@ 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[] = { |