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Add support for ADC16 driver on RA2A1 MCU #95710

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Add support for ADC16 driver on RA2A1 MCU #95710

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95e7652
manifest: update rev of hal_renesas to lastest
Sep 15, 2025
e80e9f4
drivers: adc: Adding ADC 16-bit driver support for board EK-RA2A1
Sep 4, 2025
842432f
dts: arm: renesas: Add ADC device node for EK-RA2A1 and set unit prop
Sep 4, 2025
5652a42
boards: renesas: Add ADC device node for EK-RA2A1 board
Sep 9, 2025
74e3ed6
tests: drivers: adc: Add tests support for ADC driver on EK-RA2A1 board
Sep 4, 2025
d9273ba
samples: drivers: adc: Add tests support for ADC driver on EK-RA2A1 b…
Sep 4, 2025
917f5ca
drivers: adc: Remove doxygen comment blocks
Sep 8, 2025
42c6a62
doc: releases: Update migration guilde for ADC driver
Sep 30, 2025
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8 changes: 8 additions & 0 deletions boards/renesas/ek_ra2a1/ek_ra2a1-pinctrl.dtsi
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Expand Up @@ -45,6 +45,14 @@
};
};

adc0_default: adc0_default {
group1 {
/* input */
psels = <RA_PSEL(RA_PSEL_ADC, 5, 0)>;
renesas,analog-enable;
};
};

dac0_default: dac0_default {
group1 {
/* output */
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7 changes: 7 additions & 0 deletions boards/renesas/ek_ra2a1/ek_ra2a1.dts
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Expand Up @@ -7,6 +7,7 @@

#include <renesas/ra/ra2/r7fa2a1ab3cfm.dtsi>
#include <zephyr/dt-bindings/gpio/gpio.h>
#include <zephyr/dt-bindings/adc/adc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>

#include "ek_ra2a1-pinctrl.dtsi"
Expand Down Expand Up @@ -119,6 +120,12 @@
status = "okay";
};

&adc0 {
status = "okay";
pinctrl-0 = <&adc0_default>;
pinctrl-names = "default";
};

&dac0 {
pinctrl-0 = <&dac0_default>;
pinctrl-names = "default";
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11 changes: 11 additions & 0 deletions doc/releases/migration-guide-4.3.rst
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Expand Up @@ -58,6 +58,17 @@ Device Drivers and Devicetree

.. zephyr-keep-sorted-start re(^\w)

ADC
===

* The :dtcompatible:`renesas,ra-adc` compatible has been replaced by
:dtcompatible:`renesas,ra-adc12`. Applications using the old compatible
must update their devicetree nodes.

* The :dtcompatible:`renesas,ra-adc16` compatible was added. This must be
used when working with the EK-RA2A1 board, which provides a 16-bit ADC
resolution.

MFD
===

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2 changes: 1 addition & 1 deletion drivers/adc/Kconfig.renesas_ra
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Expand Up @@ -6,7 +6,7 @@
config ADC_RENESAS_RA
bool "Renesas RA ADC"
default y
depends on DT_HAS_RENESAS_RA_ADC_ENABLED
depends on DT_HAS_RENESAS_RA_ADC12_ENABLED || DT_HAS_RENESAS_RA_ADC16_ENABLED
select USE_RA_FSP_ADC
select PINCTRL
help
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