| Message ID | 1575851866-18919-6-git-send-email-jeff@labundy.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add support for Azoteq IQS620A/621/622/624/625 | expand |
On Mon, 9 Dec 2019 00:38:38 +0000 Jeff LaBundy <jeff@labundy.com> wrote: > This patch adds support for the Azoteq IQS620AT temperature sensor, > capable of reporting its absolute die temperature. > > Signed-off-by: Jeff LaBundy <jeff@labundy.com> Looks good to me. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Thanks, Jonathan > --- > Changes in v2: > - Moved the driver from hwmon to iio > - Merged 'Copyright' and 'Author' lines into one in introductory comments > - Replaced 'error' with 'ret' throughout > - Eliminated tabbed alignment of platform_driver struct members > - Changed Kconfig "depends on" logic to MFD_IQS62X || COMPILE_TEST > > drivers/iio/temperature/Kconfig | 10 ++++ > drivers/iio/temperature/Makefile | 1 + > drivers/iio/temperature/iqs620at-temp.c | 97 +++++++++++++++++++++++++++++++++ > 3 files changed, 108 insertions(+) > create mode 100644 drivers/iio/temperature/iqs620at-temp.c > > diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig > index e1ccb40..f1f2a14 100644 > --- a/drivers/iio/temperature/Kconfig > +++ b/drivers/iio/temperature/Kconfig > @@ -4,6 +4,16 @@ > # > menu "Temperature sensors" > > +config IQS620AT_TEMP > + tristate "Azoteq IQS620AT temperature sensor" > + depends on MFD_IQS62X || COMPILE_TEST > + help > + Say Y here if you want to build support for the Azoteq IQS620AT > + temperature sensor. > + > + To compile this driver as a module, choose M here: the module > + will be called iqs620at-temp. > + > config LTC2983 > tristate "Analog Devices Multi-Sensor Digital Temperature Measurement System" > depends on SPI > diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile > index d6b850b..90c1131 100644 > --- a/drivers/iio/temperature/Makefile > +++ b/drivers/iio/temperature/Makefile > @@ -3,6 +3,7 @@ > # Makefile for industrial I/O temperature drivers > # > > +obj-$(CONFIG_IQS620AT_TEMP) += iqs620at-temp.o > obj-$(CONFIG_LTC2983) += ltc2983.o > obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o > obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o > diff --git a/drivers/iio/temperature/iqs620at-temp.c b/drivers/iio/temperature/iqs620at-temp.c > new file mode 100644 > index 0000000..d20cb6ad > --- /dev/null > +++ b/drivers/iio/temperature/iqs620at-temp.c > @@ -0,0 +1,97 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Azoteq IQS620AT Temperature Sensor > + * > + * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> > + */ > + > +#include <linux/device.h> > +#include <linux/iio/iio.h> > +#include <linux/kernel.h> > +#include <linux/mfd/iqs62x.h> > +#include <linux/module.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > + > +#define IQS620_TEMP_UI_OUT 0x1A > + > +#define IQS620_TEMP_SCALE 1000 > +#define IQS620_TEMP_OFFSET (-100) > + > +static int iqs620_temp_read_raw(struct iio_dev *indio_dev, > + struct iio_chan_spec const *chan, > + int *val, int *val2, long mask) > +{ > + struct iqs62x_core *iqs62x = iio_device_get_drvdata(indio_dev); > + int ret; > + __le16 val_buf; > + > + switch (mask) { > + case IIO_CHAN_INFO_RAW: > + ret = regmap_raw_read(iqs62x->map, IQS620_TEMP_UI_OUT, &val_buf, > + sizeof(val_buf)); > + if (ret) > + return ret; > + > + *val = le16_to_cpu(val_buf); > + return IIO_VAL_INT; > + > + case IIO_CHAN_INFO_SCALE: > + *val = IQS620_TEMP_SCALE; > + return IIO_VAL_INT; > + > + case IIO_CHAN_INFO_OFFSET: > + *val = IQS620_TEMP_OFFSET; > + return IIO_VAL_INT; > + > + default: > + return -EINVAL; > + } > +} > + > +static const struct iio_info iqs620_temp_info = { > + .read_raw = &iqs620_temp_read_raw, > +}; > + > +static const struct iio_chan_spec iqs620_temp_channels[] = { > + { > + .type = IIO_TEMP, > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | > + BIT(IIO_CHAN_INFO_SCALE) | > + BIT(IIO_CHAN_INFO_OFFSET), > + }, > +}; > + > +static int iqs620_temp_probe(struct platform_device *pdev) > +{ > + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); > + struct iio_dev *indio_dev; > + > + indio_dev = devm_iio_device_alloc(&pdev->dev, 0); > + if (!indio_dev) > + return -ENOMEM; > + > + iio_device_set_drvdata(indio_dev, iqs62x); > + > + indio_dev->modes = INDIO_DIRECT_MODE; > + indio_dev->dev.parent = &pdev->dev; > + indio_dev->channels = iqs620_temp_channels; > + indio_dev->num_channels = ARRAY_SIZE(iqs620_temp_channels); > + indio_dev->name = iqs62x->dev_desc->dev_name; > + indio_dev->info = &iqs620_temp_info; > + > + return devm_iio_device_register(&pdev->dev, indio_dev); > +} > + > +static struct platform_driver iqs620_temp_platform_driver = { > + .driver = { > + .name = IQS620_DRV_NAME_TEMP, > + }, > + .probe = iqs620_temp_probe, > +}; > +module_platform_driver(iqs620_temp_platform_driver); > + > +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); > +MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" IQS620_DRV_NAME_TEMP); > -- > 2.7.4 >
diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig index e1ccb40..f1f2a14 100644 --- a/drivers/iio/temperature/Kconfig +++ b/drivers/iio/temperature/Kconfig @@ -4,6 +4,16 @@ # menu "Temperature sensors" +config IQS620AT_TEMP + tristate "Azoteq IQS620AT temperature sensor" + depends on MFD_IQS62X || COMPILE_TEST + help + Say Y here if you want to build support for the Azoteq IQS620AT + temperature sensor. + + To compile this driver as a module, choose M here: the module + will be called iqs620at-temp. + config LTC2983 tristate "Analog Devices Multi-Sensor Digital Temperature Measurement System" depends on SPI diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile index d6b850b..90c1131 100644 --- a/drivers/iio/temperature/Makefile +++ b/drivers/iio/temperature/Makefile @@ -3,6 +3,7 @@ # Makefile for industrial I/O temperature drivers # +obj-$(CONFIG_IQS620AT_TEMP) += iqs620at-temp.o obj-$(CONFIG_LTC2983) += ltc2983.o obj-$(CONFIG_HID_SENSOR_TEMP) += hid-sensor-temperature.o obj-$(CONFIG_MAXIM_THERMOCOUPLE) += maxim_thermocouple.o diff --git a/drivers/iio/temperature/iqs620at-temp.c b/drivers/iio/temperature/iqs620at-temp.c new file mode 100644 index 0000000..d20cb6ad --- /dev/null +++ b/drivers/iio/temperature/iqs620at-temp.c @@ -0,0 +1,97 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Azoteq IQS620AT Temperature Sensor + * + * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com> + */ + +#include <linux/device.h> +#include <linux/iio/iio.h> +#include <linux/kernel.h> +#include <linux/mfd/iqs62x.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/regmap.h> + +#define IQS620_TEMP_UI_OUT 0x1A + +#define IQS620_TEMP_SCALE 1000 +#define IQS620_TEMP_OFFSET (-100) + +static int iqs620_temp_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct iqs62x_core *iqs62x = iio_device_get_drvdata(indio_dev); + int ret; + __le16 val_buf; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = regmap_raw_read(iqs62x->map, IQS620_TEMP_UI_OUT, &val_buf, + sizeof(val_buf)); + if (ret) + return ret; + + *val = le16_to_cpu(val_buf); + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + *val = IQS620_TEMP_SCALE; + return IIO_VAL_INT; + + case IIO_CHAN_INFO_OFFSET: + *val = IQS620_TEMP_OFFSET; + return IIO_VAL_INT; + + default: + return -EINVAL; + } +} + +static const struct iio_info iqs620_temp_info = { + .read_raw = &iqs620_temp_read_raw, +}; + +static const struct iio_chan_spec iqs620_temp_channels[] = { + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + }, +}; + +static int iqs620_temp_probe(struct platform_device *pdev) +{ + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); + struct iio_dev *indio_dev; + + indio_dev = devm_iio_device_alloc(&pdev->dev, 0); + if (!indio_dev) + return -ENOMEM; + + iio_device_set_drvdata(indio_dev, iqs62x); + + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->dev.parent = &pdev->dev; + indio_dev->channels = iqs620_temp_channels; + indio_dev->num_channels = ARRAY_SIZE(iqs620_temp_channels); + indio_dev->name = iqs62x->dev_desc->dev_name; + indio_dev->info = &iqs620_temp_info; + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static struct platform_driver iqs620_temp_platform_driver = { + .driver = { + .name = IQS620_DRV_NAME_TEMP, + }, + .probe = iqs620_temp_probe, +}; +module_platform_driver(iqs620_temp_platform_driver); + +MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>"); +MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" IQS620_DRV_NAME_TEMP);
This patch adds support for the Azoteq IQS620AT temperature sensor, capable of reporting its absolute die temperature. Signed-off-by: Jeff LaBundy <jeff@labundy.com> --- Changes in v2: - Moved the driver from hwmon to iio - Merged 'Copyright' and 'Author' lines into one in introductory comments - Replaced 'error' with 'ret' throughout - Eliminated tabbed alignment of platform_driver struct members - Changed Kconfig "depends on" logic to MFD_IQS62X || COMPILE_TEST drivers/iio/temperature/Kconfig | 10 ++++ drivers/iio/temperature/Makefile | 1 + drivers/iio/temperature/iqs620at-temp.c | 97 +++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+) create mode 100644 drivers/iio/temperature/iqs620at-temp.c -- 2.7.4