[PATCH 00/40] TI AM437X ADC1

Miquel Raynal
2021-08-25T15:29:09Z

Hello,

This is a (fairly big) series bringing support of AM437X ADC1.
On TI AM33XX SoCs family there is an ADC that can also be connected to a
touchscreen. This hardware has been extended and is present on certain
SoCs from the AM437X family. In particular, the touchscreen has been
replaced by a magnetic card reader. In both cases, the representation is
an MFD device with two children:
- on AM33XX: the touchscreen controller and the ADC
- on AM437X: the magnetic card reader and the ADC

This series really targets small and atomic changes so that the overall
review is eased, even though it leads to a lot of rather small patches.
Here are the steps:
* Supporting the missing clock
* Translating a single text file containing the description for the
MFD, the touchscreen and the ADC into three independent yaml files.
* Cleaning/preparing the MFD driver.
* Supporting ADC1 in the MFD driver.
* Cleaning/preparing of the ADC driver.
* Supporting ADC1 in the ADC driver.
* Updating various device trees.

Here is the full series, I can split it if the various maintainers
prefer. The clk patch can be merged alone, the MFD and the ADC changes
unfortunately are interdependent so, reviewed, the MFD maintainers will
have to create an immutable tag after applying so that ADC maintainers
can merge it. For now, this is open for reviews :) !

Thanks,
Miquèl

Miquel Raynal (40):
clk: ti: am43xx: Add clkctrl data for am43xx ADC1
dt-bindings: mfd: ti,am3359-tscadc: Add a yaml description for this
MFD
dt-bindings: touchscreen: ti,am3359-tsc: New yaml description
dt-bindings: iio: adc: ti,am3359-adc: New yaml description
dt-bindings: touchscreen: ti,am3359-tsc: Remove deprecated text file
dt-bindings: mfd: ti,am3359-tscadc: Describe am4372 MFD compatible
dt-bindings: iio: adc: ti,am3359-adc: Describe am4372 ADC compatible
mfd: ti_am335x_tscadc: Replace license text with SPDX tag
mfd: ti_am335x_tscadc: Fix style
mfd: ti_am335x_tscadc: Drop extra spacing when declaring stack
variables
mfd: ti_am335x_tscadc: Get rid of useless gotos
mfd: ti_am335x_tscadc: Move the driver structure allocation earlier
mfd: ti_am335x_tscadc: Reword the comment explaining the dividers
mfd: ti_am335x_tscadc: Don't search the tree for our clock
mfd: ti_am335x_tscadc: Simplify divisor calculation
mfd: ti_am335x_tscadc: Use driver data
mfd: ti_am335x_tscadc: Mimic the probe from resume()
mfd: ti_am335x_tscadc: Drop useless variables from the driver
structure
mfd: ti_am335x_tscadc: Always provide an idle configuration
mfd: ti_am335x_tscadc: Gather the ctrl register logic at one place
mfd: ti_am335x_tscadc: Rename the subsystem enable macro
mfd: ti_am335x_tscadc: Add TSC prefix in certain macros
mfd: ti_am335x_tscadc: Rename a variable
mfd: ti_am335x_tscadc: Fix an error message
mfd: ti_am335x_tscadc: Add a boolean to clarify the presence of a
touchscreen
mfd: ti_am335x_tscadc: Introduce has_tsc
mfd: ti_am335x_tscadc: Move control register configuration
mfd: ti_am335x_tscadc: Add ADC1/magnetic reader support
mfd: ti_am335x_tscadc: Support the correctly spelled DT property
iio: adc: ti_am335x_adc: Replace license text with SPDX tag
iio: adc: ti_am335x_adc: Fix style
iio: adc: ti_am335x_adc: Get rid of useless gotos
iio: adc: ti_am335x_adc: Gather the checks on the delays
iio: adc: ti_am335x_adc: Add a unit to the timeout delay
iio: adc: ti_am335x_adc: Wait the idle state to avoid stalls
iio: adc: ti_am335x_adc: Add the scale information
iio: adc: ti_am335x_adc: Add the am437x compatible
ARM: dts: am437x-cm-t43: Use a correctly spelled DT property
ARM: dts: am43xx: Describe the magnetic reader/ADC1 hardware module
ARM: dts: am437x-gp-evm: enable ADC1

.../bindings/iio/adc/ti,am3359-adc.yaml | 83 +++++++
.../input/touchscreen/ti,am3359-tsc.yaml | 89 +++++++
.../bindings/input/touchscreen/ti-tsc-adc.txt | 91 -------
.../bindings/mfd/ti,am3359-tscadc.yaml | 80 ++++++
arch/arm/boot/dts/am437x-cm-t43.dts | 2 +-
arch/arm/boot/dts/am437x-gp-evm.dts | 8 +
arch/arm/boot/dts/am437x-l4.dtsi | 31 ++-
arch/arm/boot/dts/am43xx-clocks.dtsi | 7 +
drivers/clk/ti/clk-43xx.c | 1 +
drivers/iio/adc/ti_am335x_adc.c | 217 +++++++++-------
drivers/mfd/ti_am335x_tscadc.c | 232 ++++++++++--------
include/dt-bindings/clock/am4.h | 1 +
include/linux/mfd/ti_am335x_tscadc.h | 42 ++--
13 files changed, 582 insertions(+), 302 deletions(-)
create mode 100644 Documentation/devicetree/bindings/iio/adc/ti,am3359-adc.yaml
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/ti,am3359-tsc.yaml
delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/ti-tsc-adc.txt
create mode 100644 Documentation/devicetree/bindings/mfd/ti,am3359-tscadc.yaml

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2.27.0