linux-kernel - [PATCH v2 0/7] Add ADCs support for RZ/T2H and RZ/N2H

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Message-ID: <20250925224013.2146983-1-cosmin-gabriel.tanislav.xa@renesas.com>
Date: Fri, 26 Sep 2025 01:40:02 +0300
From: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>
To: 
Cc: Cosmin Tanislav <cosmin-gabriel.tanislav.xa@...esas.com>,
	Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Nuno Sá <nuno.sa@...log.com>,
	Andy Shevchenko <andy@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	linux-iio@...r.kernel.org,
	linux-renesas-soc@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/7] Add ADCs support for RZ/T2H and RZ/N2H

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.

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    |  69 ++++
 .../dts/renesas/r9a09g077m44-rzt2h-evk.dts    |  28 ++
 arch/arm64/boot/dts/renesas/r9a09g087.dtsi    |  69 ++++
 .../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                   | 306 ++++++++++++++++++
 12 files changed, 798 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