Renesas RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs include three
12-Bit successive approximation A/D converters.

RZ/T2H has two ADCs with 4 channels and one with 6.
RZ/N2H has two ADCs with 4 channels and one with 15.

Add support for them.

V3:
 * remove leftover renesas,max-channels property from SoC dts
 * split rzt2h_adc_start_stop() into rzt2h_adc_start() and
   rzt2h_adc_stop(), getting rid of mask variable
 * use FIELD_MODIFY() to clear and set at the same time
 * switch from guard(mutex) to mutex_lock() & mutex_unlock() to keep
   pm_runtime_put_autosuspend() out of the mutex and to avoid using both
   guard() and goto in the same function
 * inline ret and irq declarations
 * use private state rather than indio_dev for platform_set_drvdata() to
   avoid extra pointer arithmetic
 * pick up Reviewed-by for the driver from Nuno
 * pick up Acked-by for the bindings from Conor
 * pick up Reviewed-by for the bindings from Geert

V2:
 * pick up Reviewed-by from Geert
 * dt-bindings: move required after patternProperties
 * dt-bindings: describe 16 channels, but limit per-SoC to 6 / 15
 * dt-bindings: use uppercase for clock descriptions
 * remove max-channels property and find it from parsed channel subnodes
 * remove start/stop wrappers
 * stop calibration even on failure
 * move data reading to rzt2h_adc_read_single() instead of interrupt
 * handler

Cosmin Tanislav (7):
  clk: renesas: r9a09g077: Add ADC modules clock
  dt-bindings: iio: adc: document RZ/T2H and RZ/N2H ADC
  iio: adc: add RZ/T2H / RZ/N2H ADC driver
  arm64: dts: renesas: r9a09g077: Add ADCs support
  arm64: dts: renesas: r9a09g087: Add ADCs support
  arm64: dts: renesas: rzt2h/rzn2h-evk: enable ADCs
  arm64: defconfig: enable RZ/T2H / RZ/N2H ADC driver

 .../iio/adc/renesas,r9a09g077-adc.yaml        | 160 +++++++++
 MAINTAINERS                                   |   8 +
 arch/arm64/boot/dts/renesas/r9a09g077.dtsi    |  66 ++++
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    |  28 ++
 arch/arm64/boot/dts/renesas/r9a09g087.dtsi    |  66 ++++
 .../dts/renesas/r9a09g087m44-rzn2h-evk.dts    |  64 ++++
 .../dts/renesas/rzt2h-n2h-evk-common.dtsi     |  79 +++++
 arch/arm64/configs/defconfig                  |   1 +
 drivers/clk/renesas/r9a09g077-cpg.c           |   3 +
 drivers/iio/adc/Kconfig                       |  10 +
 drivers/iio/adc/Makefile                      |   1 +
 drivers/iio/adc/rzt2h_adc.c                   | 309 ++++++++++++++++++
 12 files changed, 795 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/renesas,r9a09g077-adc.yaml
 create mode 100644 drivers/iio/adc/rzt2h_adc.c

-- 
2.51.0