linux_dsm_epyc7002/drivers/iio
Andrea Merello d7f6a749f3 iio: maxim_thermocouple: add thermocouple_type sysfs attribute
We added a sysfs ABI for getting/setting the type of a thermocouple. This
driver supports chips that support specific fixed thermocouple types; we
cannot set it, but still we can add this sysfs attribute in RO mode to
read-back the thermocouple type.

This driver supports actually several chips:
 - max6675
 - max31855[k/j/n/s/t/e/r]asa family

Max6675 supports only K-type thermocouples, so we can just report that.

Each chip in max31855 family supports just one specific thermocouple type
(in the obvious way: i.e. max31855jasa supports J-type). This driver did
accept a generic SPI ID and OF compatible "max31855" which does not give
any clue about which chip is really involved (and unfortunately it seems
we have no way to detect it).

This patch introduces a new set of, more specific, SPI IDs and OF
compatible strings to better match the chip type.

The old, generic, "max31855" binding is kept for compatibility reasons, but
this patch aims to deprecate it, so, should we hit it, a warning is spit.
In such case the reported thermocouple type in sysfs is '?', because we
have no way to know.

Regarding the implementation: the thermocouple type information is stored
in the driver private data and I've kept only two maxim_thermocouple_chip
types in order to avoid a lot of duplications (seven chip types with just
a different thermocouple type).

RFT because I have no real HW to test this.

Cc: Hartmut Knaack <knaack.h@gmx.de>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: Patrick Havelange <patrick.havelange@essensium.com>
Cc: Matt Weber <matthew.weber@rockwellcollins.com>
Cc: Matt Ranostay <matt.ranostay@konsulko.com>
Cc: Chuhong Yuan <hslester96@gmail.com>
Cc: Daniel Gomez <dagmcr@gmail.com>
Cc: linux-iio@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Andrea Merello <andrea.merello@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2019-11-23 14:25:02 +00:00
..
accel iio: st: Drop GPIO include 2019-10-27 15:55:45 +00:00
adc iio: adc: max9611: Make enum relations more future proof 2019-11-16 17:31:01 +00:00
afe treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
amplifiers Second set of IIO device support, features, cleanups and minor fixes for 5.3. 2019-07-01 10:58:13 +02:00
buffer iio: buffer-dmaengine: Use dma_request_chan() directly for channel request 2019-11-16 16:21:56 +00:00
chemical iio: chemical: sgp30: drop excess semicolon 2019-10-22 12:41:07 +01:00
common chrome platform changes for v5.4 2019-09-19 14:14:28 -07:00
dac iio: dac: ad5446: Add support for new AD5600 DAC 2019-11-10 15:14:06 +00:00
dummy spi: docs: convert to ReST and add it to the kABI bookset 2019-07-31 14:13:13 -06:00
frequency iio: frequency: adf4371: Fix output frequency setting 2019-08-05 17:38:33 +01:00
gyro iio: gyro: adis16260: replace mlock with ADIS lib's state_lock 2019-11-23 12:19:15 +00:00
health treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 174 2019-05-30 11:26:41 -07:00
humidity iio: hdc100x: fix iio_triggered_buffer_{predisable,postenable} positions 2019-11-02 14:39:41 +00:00
imu iio: imu: adis16480: use state lock for filter freq set 2019-11-23 12:17:35 +00:00
light iio: light: add driver for veml6030 ambient light sensor 2019-11-10 10:39:33 +00:00
magnetometer iio: st: Drop GPIO include 2019-10-27 15:55:45 +00:00
multiplexer treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
orientation treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 309 2019-06-05 17:37:04 +02:00
potentiometer iio: potentiometer: add a driver for Maxim 5432-5435 2019-08-05 14:25:08 +01:00
potentiostat treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
pressure iio: cros_ec_baro: set info_mask_shared_by_all_available field 2019-11-10 16:00:33 +00:00
proximity Merge 5.4-rc7 into staging-next 2019-11-11 06:23:37 +01:00
resolver treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
temperature iio: maxim_thermocouple: add thermocouple_type sysfs attribute 2019-11-23 14:25:02 +00:00
trigger IIO: stm32: Remove quadrature related functions from trigger driver 2019-07-27 20:11:18 +01:00
iio_core_trigger.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
iio_core.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-buffer.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-configfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-core.c iio: core: add thermocouple_type standard attribute 2019-11-23 12:35:19 +00:00
industrialio-event.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-sw-device.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-sw-trigger.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-trigger.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
industrialio-triggered-event.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
inkern.c Driver Core and debugfs changes for 5.3-rc1 2019-07-12 12:24:03 -07:00
Kconfig Second set of IIO device support, features, cleanups and minor fixes for 5.3. 2019-07-01 10:58:13 +02:00
Makefile counter: stm32-lptimer: add counter device 2019-04-25 21:33:41 +02:00