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author | Andreas Klinger <ak@it-klinger.de> | 2017-01-05 20:51:57 +0300 |
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committer | Jonathan Cameron <jic23@kernel.org> | 2017-01-10 22:54:59 +0300 |
commit | c3b2fdd0ea7ee5c01c1f0d572a32aec89c0373a4 (patch) | |
tree | b40a354c7655a25f7ac880c0f83b32bdd26a57c7 /drivers/iio/adc/Kconfig | |
parent | ff1293f67734da68e23fecb6ecdae7112b8c43f9 (diff) | |
download | linux-c3b2fdd0ea7ee5c01c1f0d572a32aec89c0373a4.tar.xz |
iio: adc: hx711: Add IIO driver for AVIA HX711
This is the IIO driver for AVIA HX711 ADC which is mostly used in weighting
cells.
The protocol is quite simple and using GPIOs:
One GPIO is used as clock (SCK) while another GPIO is read (DOUT)
The raw value read from the chip is delivered.
To get a weight one needs to subtract the zero offset and scale it.
Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/adc/Kconfig')
-rw-r--r-- | drivers/iio/adc/Kconfig | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index be81ba3efd61..817693a14eb9 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -247,6 +247,25 @@ config HI8435 This driver can also be built as a module. If so, the module will be called hi8435. +config HX711 + tristate "AVIA HX711 ADC for weight cells" + depends on GPIOLIB + help + If you say yes here you get support for AVIA HX711 ADC which is used + for weigh cells + + This driver uses two GPIOs, one acts as the clock and controls the + channel selection and gain, the other one is used for the measurement + data + + Currently the raw value is read from the chip and delivered. + To get an actual weight one needs to subtract the + zero offset and multiply by a scale factor. + This should be done in userspace. + + This driver can also be built as a module. If so, the module will be + called hx711. + config INA2XX_ADC tristate "Texas Instruments INA2xx Power Monitors IIO driver" depends on I2C && !SENSORS_INA2XX |