linux-toradex.git/include/linux/iio/adc, branch v5.14-rc6

iio: adc: ad_sigma_delta: remove ad_sd_{setup,cleanup}_buffer_and_trigger()

2021-06-13T16:00:17+00:00

Since all AD Sigma-Delta drivers now use the
devm_ad_sd_setup_buffer_and_trigger() function, we can remove the old
ad_sd_{setup,cleanup}_buffer_and_trigger() functions.

This way we can discourage new drivers that use the ad_sigma_delta
lib-driver to use these (older functions).

Signed-off-by: Alexandru Ardelean 
Link: https://lore.kernel.org/r/20210513120752.90074-13-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron

iio: adc: ad_sigma_delta: introduct devm_ad_sd_setup_buffer_and_trigger()

2021-06-13T16:00:16+00:00

This is a version of ad_sd_setup_buffer_and_trigger() with all underlying
functions (that are used) being replaced with their device-managed
variants.

One thing to take care here is with {devm_}iio_trigger_alloc(), where both
functions take a parent-device object as the first parameter.

To make sure nothing quirky is happening, the devm_ad_sd_probe_trigger()
function is checking that the provided 'dev' reference is the same as the
one stored on the 'struct ad_sigma_delta' driver data.

Signed-off-by: Alexandru Ardelean 
Link: https://lore.kernel.org/r/20210513120752.90074-6-aardelean@deviqon.com
Signed-off-by: Jonathan Cameron

iio: adc: adi-axi-adc: fix typo in doc-string

2021-03-11T20:47:11+00:00

The channels are of type iio_chan_spec, not axi_adc_chan_spec. They were in
some earlier version, but forgot to rename in the doc-string.

Fixes: ef04070692a21 ("iio: adc: adi-axi-adc: add support for AXI ADC IP core")
Signed-off-by: Alexandru Ardelean 
Link: https://lore.kernel.org/r/20210219090134.48057-1-alexandru.ardelean@analog.com
Signed-off-by: Jonathan Cameron

thermal: qcom: add support for adc-tm5 PMIC thermal monitor

2021-02-15T20:28:53+00:00

Add support for Thermal Monitoring part of PMIC5. This part is closely
coupled with ADC, using it's channels directly. ADC-TM support
generating interrupts on ADC value crossing low or high voltage bounds,
which is used to support thermal trip points.

Signed-off-by: Dmitry Baryshkov 
Signed-off-by: Daniel Lezcano 
Link: https://lore.kernel.org/r/20210205000118.493610-3-dmitry.baryshkov@linaro.org

iio: adc: qcom-vadc-common: rewrite vadc7 die temp calculation

2021-01-16T18:32:36+00:00

qcom_vadc7_scale_hw_calib_die_temp() uses a table format different from
the rest of volt/temp conversion functions in this file. Also the
conversion functions results in non-monothonic values conversion, which
seems wrong.

Rewrite qcom_vadc7_scale_hw_calib_die_temp() to use
qcom_vadc_map_voltage_temp() directly, like the rest of conversion
functions do.

Signed-off-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20201204025509.1075506-10-dmitry.baryshkov@linaro.org
Signed-off-by: Jonathan Cameron

iio: adc: move vadc_map_pt from header to the source file

2021-01-16T18:28:18+00:00

struct vadc_map_pt is not used outside of qcom-vadc-common.c, so move it
there from the global header file.

Signed-off-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20201204025509.1075506-9-dmitry.baryshkov@linaro.org
Signed-off-by: Jonathan Cameron

iio: adc: move qcom-vadc-common.h to include dir

2021-01-16T18:20:56+00:00

qcom-vadc-common module will be used by ADC thermal monitoring driver,
so move it to global include dir.

Signed-off-by: Dmitry Baryshkov 
Link: https://lore.kernel.org/r/20201204025509.1075506-6-dmitry.baryshkov@linaro.org
Signed-off-by: Jonathan Cameron

iio: ad_sigma_delta: Don't put SPI transfer buffer on the stack

2020-12-03T19:32:40+00:00

Use a heap allocated memory for the SPI transfer buffer. Using stack memory
can corrupt stack memory when using DMA on some systems.

This change moves the buffer from the stack of the trigger handler call to
the heap of the buffer of the state struct. The size increases takes into
account the alignment for the timestamp, which is 8 bytes.

The 'data' buffer is split into 'tx_buf' and 'rx_buf', to make a clearer
separation of which part of the buffer should be used for TX & RX.

Fixes: af3008485ea03 ("iio:adc: Add common code for ADI Sigma Delta devices")
Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Alexandru Ardelean 
Link: https://lore.kernel.org/r/20201124123807.19717-1-alexandru.ardelean@analog.com
Cc: 
Signed-off-by: Jonathan Cameron

iio: adc: adi-axi-adc: add support for AXI ADC IP core

2020-04-19T15:56:22+00:00

This change adds support for the Analog Devices Generic AXI ADC IP core.
The IP core is used for interfacing with analog-to-digital (ADC) converters
that require either a high-speed serial interface (JESD204B/C) or a source
synchronous parallel interface (LVDS/CMOS).

Usually, some other interface type (i.e SPI) is used as a control interface
for the actual ADC, while the IP core (controlled via this driver), will
interface to the data-lines of the ADC and handle  the streaming of data
into memory via DMA.

Because of this, the AXI ADC driver needs the other SPI-ADC driver to
register with it. The SPI-ADC needs to be register via the SPI framework,
while the AXI ADC registers as a platform driver. The two cannot be ordered
in a hierarchy as both drivers have their own registers, and trying to
organize this [in a hierarchy becomes] problematic when trying to map
memory/registers.

There are some modes where the AXI ADC can operate as standalone ADC, but
those will be implemented at a later point in time.

DocLink: https://wiki.analog.com/resources/fpga/docs/axi_adc_ip

Signed-off-by: Michael Hennerich 
Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Alexandru Ardelean 
Signed-off-by: Jonathan Cameron

iio: ad_sigma_delta: remove unused IIO channel macros

2020-04-19T15:56:11+00:00

Now that all channel SigmaDelta IIO channel macros have been localized,
remove the generic ones.

Signed-off-by: Alexandru Ardelean 
Signed-off-by: Jonathan Cameron