Add missing <of_device_id> table for SPI driver relying on SPI
device match since compatible is in a DT binding or in a DTS.
Before this patch:
modinfo drivers/iio/temperature/maxim_thermocouple.ko | grep alias
alias: spi:max31855
alias: spi:max6675
After this patch:
modinfo drivers/iio/temperature/maxim_thermocouple.ko | grep alias
alias: spi:max31855
alias: spi:max6675
alias: of:N*T*Cmaxim,max31855C*
alias: of:N*T*Cmaxim,max31855
alias: of:N*T*Cmaxim,max6675C*
alias: of:N*T*Cmaxim,max6675
Reported-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Daniel Gomez <dagmcr@gmail.com>
Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This reverts commit 535fba29b3.
Seems the submitter (er me, hang head in shame) didn't look at the datasheet
enough to see that the registers are quite different.
This needs to be reverted because a) would never work b) to open it be added
to a Maxim RTDs (Resistance Temperature Detectors) under development by author
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Add GPLv2+ SPDX identifier and update email for author's drivers.
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
The equivalent of this is now done via macro magic when
the relevant register call is made. The actual structure
elements will shortly go away.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Lars-Peter Clausen <lars@metafoo.de>
MAX31856 is register equivalent to the MAX31855 but suppports J, N, R,
S, T, E and B type thermocouples in addition to K-type.
Data conversion for the various types happens transparently to the driver
via probe type detection, and a LUT on the sensor.
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Initialize the parent of the IIO device to the device that registered it.
This makes sure that the IIO device appears the right level in the device
hierarchy.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
As found by gcc -Wmaybe-uninitialized, having a storage_bytes value other
than 2 or 4 will result in undefined behavior:
drivers/iio/temperature/maxim_thermocouple.c: In function 'maxim_thermocouple_read':
drivers/iio/temperature/maxim_thermocouple.c:141:5: error: 'ret' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This probably cannot happen, but returning -EINVAL here is appropriate
and makes gcc happy and the code more robust.
Fixes: 231147ee77 ("iio: maxim_thermocouple: Align 16 bit big endian value of raw reads")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
(cherry picked from commit 32cb7d27e6)
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Driver was reporting invalid raw read values for MAX6675 on big
endian architectures. MAX6675 buffered mode is not affected, nor
is the MAX31855.
The driver was losing a 2 byte read value when it used a 32 bit
integer buffer to store a 16 bit big endian value. Use big endian
types to properly align buffers on big endian architectures.
Fixes following sparse endianness warnings:
warning: cast to restricted __be16
warning: cast to restricted __be32
Fixes checkpatch issue:
CHECK: No space is necessary after a cast
Signed-off-by: sayli karnik <karniksayli1995@gmail.com>
Fixes: 1f25ca11d8 ("iio: temperature: add support for Maxim
thermocouple chips")
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Fixes the following sparse warnings:
drivers/iio/temperature/maxim_thermocouple.c:35:28: warning:
symbol 'max6675_channels' was not declared. Should it be static?
drivers/iio/temperature/maxim_thermocouple.c:52:28: warning:
symbol 'max31855_channels' was not declared. Should it be static?
drivers/iio/temperature/maxim_thermocouple.c:98:38: warning:
symbol 'maxim_thermocouple_chips' was not declared. Should it be static?
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-By: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Add initial driver support for MAX6675, and MAX31855 thermocouple chips.
Cc: Marek Vasut <marex@denx.de>
Cc: Matt Porter <mporter@konsulko.com>
Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Daniel Gomez