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Add silabs series 2 IADC driver with scan conversion and DMA support. #94264

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Add silabs series 2 IADC driver with scan conversion and DMA support. #94264

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011d79a
drivers: adc: enhance millivolt conversion with 64-bit support
Martinhoff-maker Sep 19, 2025
7739ebd
drivers: adc: add IADC support for silabs series 2 boards
Martinhoff-maker Aug 8, 2025
b1b80ac
dts: arm: silabs: update IADC driver binding for all series 2 board
Martinhoff-maker Aug 8, 2025
3c67ff1
boards: silabs: add ADC io-channels on multiples boards
Martinhoff-maker Oct 3, 2025
a762b21
samples: adc_sequence: add oversampling configuration option
Martinhoff-maker Sep 19, 2025
d8e8244
samples: adc_sequence: differential mode handling in ADC conversion
Martinhoff-maker Sep 23, 2025
0812b53
samples/tests: adc: silabs: add multiple device overlays.
Martinhoff-maker Aug 8, 2025
0c0469d
drivers: adc: add DMA support for Silabs IADC
Martinhoff-maker Aug 8, 2025
dc4d603
tests: adc: add configuration and overlay for DMA support on Silabs IADC
Martinhoff-maker Aug 8, 2025
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6 changes: 6 additions & 0 deletions boards/silabs/radio_boards/slwrb4180a/slwrb4180a-pinctrl.dtsi
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Expand Up @@ -21,4 +21,10 @@
silabs,input-filter;
};
};

iadc0_default: iadc0_default {
group0 {
silabs,analog-bus = <ABUS_AEVEN0_IADC0>;
};
};
};
55 changes: 55 additions & 0 deletions boards/silabs/radio_boards/slwrb4180a/slwrb4180a.dts
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Expand Up @@ -6,6 +6,7 @@

/dts-v1/;
#include <silabs/xg21/efr32mg21a020f1024im32.dtsi>
#include <dt-bindings/adc/silabs-adc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include "slwrb4180a-pinctrl.dtsi"

Expand All @@ -30,6 +31,7 @@
sw0 = &button0;
sw1 = &button1;
watchdog0 = &wdog0;
adc0 = &adc0;
};

leds {
Expand Down Expand Up @@ -64,6 +66,37 @@
};
};

joystick {
compatible = "adc-keys";
io-channels = <&adc0 0>;
keyup-threshold-mv = <3300>;

select-key {
press-thresholds-mv = <33>;
zephyr,code = <INPUT_KEY_ENTER>;
};

left-key {
press-thresholds-mv = <1980>;
zephyr,code = <INPUT_KEY_LEFT>;
};

down-key {
press-thresholds-mv = <1650>;
zephyr,code = <INPUT_KEY_DOWN>;
};

up-key {
press-thresholds-mv = <2831>;
zephyr,code = <INPUT_KEY_UP>;
};

right-key {
press-thresholds-mv = <2533>;
zephyr,code = <INPUT_KEY_RIGHT>;
};
};

exp_header: exp-header {
compatible = "silabs,exp-header";
#gpio-cells = <2>;
Expand All @@ -80,6 +113,10 @@
gpio-map-mask = <0xffffffff 0x0>;
gpio-map-pass-thru = <0x0 GPIO_DT_FLAGS_MASK>;
};

zephyr,user {
io-channels = <&adc0 0>;
};
};

&cpu0 {
Expand Down Expand Up @@ -128,6 +165,24 @@
clocks = <&lfxo>;
};

&adc0 {
pinctrl-0 = <&iadc0_default>;
pinctrl-names = "default";
#address-cells = <1>;
#size-cells = <0>;
status = "okay";

channel@0 {
reg = <0>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,gain = "ADC_GAIN_1";
zephyr,input-positive = <IADC_INPUT_PA0>;
zephyr,reference = "ADC_REF_VDD_1";
zephyr,resolution = <12>;
zephyr,vref-mv = <3300>;
};
};

&usart0 {
current-speed = <115200>;
pinctrl-0 = <&usart0_default>;
Expand Down
6 changes: 6 additions & 0 deletions boards/silabs/radio_boards/slwrb4180b/slwrb4180b-pinctrl.dtsi
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Expand Up @@ -20,4 +20,10 @@
silabs,input-filter;
};
};

iadc0_default: iadc0_default {
group0 {
silabs,analog-bus = <ABUS_AEVEN0_IADC0>;
};
};
};
55 changes: 55 additions & 0 deletions boards/silabs/radio_boards/slwrb4180b/slwrb4180b.dts
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Expand Up @@ -7,6 +7,7 @@

/dts-v1/;
#include <silabs/xg21/efr32mg21a020f1024im32.dtsi>
#include <dt-bindings/adc/silabs-adc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include "slwrb4180b-pinctrl.dtsi"

Expand All @@ -30,6 +31,7 @@
sw0 = &button0;
sw1 = &button1;
watchdog0 = &wdog0;
adc0 = &adc0;
};

leds {
Expand Down Expand Up @@ -62,6 +64,37 @@
};
};

joystick {
compatible = "adc-keys";
io-channels = <&adc0 0>;
keyup-threshold-mv = <3300>;

select-key {
press-thresholds-mv = <33>;
zephyr,code = <INPUT_KEY_ENTER>;
};

left-key {
press-thresholds-mv = <1980>;
zephyr,code = <INPUT_KEY_LEFT>;
};

down-key {
press-thresholds-mv = <1650>;
zephyr,code = <INPUT_KEY_DOWN>;
};

up-key {
press-thresholds-mv = <2831>;
zephyr,code = <INPUT_KEY_UP>;
};

right-key {
press-thresholds-mv = <2533>;
zephyr,code = <INPUT_KEY_RIGHT>;
};
};

exp_header: exp-header {
compatible = "silabs,exp-header";
#gpio-cells = <2>;
Expand All @@ -78,6 +111,10 @@
gpio-map-mask = <0xffffffff 0x0>;
gpio-map-pass-thru = <0x0 GPIO_DT_FLAGS_MASK>;
};

zephyr,user {
io-channels = <&adc0 0>;
};
};

&cpu0 {
Expand Down Expand Up @@ -126,6 +163,24 @@
clocks = <&lfxo>;
};

&adc0 {
pinctrl-0 = <&iadc0_default>;
pinctrl-names = "default";
#address-cells = <1>;
#size-cells = <0>;
status = "okay";

channel@0 {
reg = <0>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,gain = "ADC_GAIN_1";
zephyr,input-positive = <IADC_INPUT_PA0>;
zephyr,reference = "ADC_REF_VDD_1";
zephyr,resolution = <12>;
zephyr,vref-mv = <3300>;
};
};

&usart0 {
current-speed = <115200>;
pinctrl-0 = <&usart0_default>;
Expand Down
1 change: 1 addition & 0 deletions boards/silabs/radio_boards/xg27/xg27_rb4194a.dts
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Expand Up @@ -36,6 +36,7 @@
sw1 = &button1;
watchdog0 = &wdog0;
dht0 = &si7021;
adc0 = &adc0;
};

leds {
Expand Down
6 changes: 6 additions & 0 deletions boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a-pinctrl.dtsi
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,12 @@
};
};

iadc0_default: iadc0_default {
group0 {
silabs,analog-bus = <ABUS_CDODD0_IADC0>;
};
};

itm_default: itm_default {
group0 {
pins = <GPIO_SWV_PA3>;
Expand Down
55 changes: 55 additions & 0 deletions boards/silabs/radio_boards/xg29_rb4412a/xg29_rb4412a.dts
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Expand Up @@ -6,6 +6,7 @@

/dts-v1/;
#include <silabs/xg29/efr32mg29b140f1024im40.dtsi>
#include <dt-bindings/adc/silabs-adc.h>
#include <zephyr/dt-bindings/input/input-event-codes.h>
#include <zephyr/dt-bindings/pwm/pwm.h>
#include <zephyr/dt-bindings/regulator/silabs_dcdc.h>
Expand Down Expand Up @@ -35,6 +36,7 @@
sw1 = &button1;
watchdog0 = &wdog0;
dht0 = &si7021;
adc0 = &adc0;
};

leds {
Expand Down Expand Up @@ -75,6 +77,37 @@
};
};

joystick {
compatible = "adc-keys";
io-channels = <&adc0 0>;
keyup-threshold-mv = <3300>;

select-key {
press-thresholds-mv = <33>;
zephyr,code = <INPUT_KEY_ENTER>;
};

left-key {
press-thresholds-mv = <1980>;
zephyr,code = <INPUT_KEY_LEFT>;
};

down-key {
press-thresholds-mv = <1650>;
zephyr,code = <INPUT_KEY_DOWN>;
};

up-key {
press-thresholds-mv = <2831>;
zephyr,code = <INPUT_KEY_UP>;
};

right-key {
press-thresholds-mv = <2533>;
zephyr,code = <INPUT_KEY_RIGHT>;
};
};

display_enable: sensor_enable: gpio_switch_0 {
compatible = "regulator-fixed";
enable-gpios = <&gpioc 7 GPIO_ACTIVE_HIGH>;
Expand All @@ -98,6 +131,10 @@
gpio-map-mask = <0xffffffff 0x0>;
gpio-map-pass-thru = <0x0 GPIO_DT_FLAGS_MASK>;
};

zephyr,user {
io-channels = <&adc0 0>;
};
};

&cpu0 {
Expand Down Expand Up @@ -210,6 +247,24 @@
};
};

&adc0 {
pinctrl-0 = <&iadc0_default>;
pinctrl-names = "default";
#address-cells = <1>;
#size-cells = <0>;
status = "okay";

channel@0 {
reg = <0>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,gain = "ADC_GAIN_1";
zephyr,input-positive = <IADC_INPUT_PD3>;
zephyr,reference = "ADC_REF_VDD_1";
zephyr,resolution = <12>;
zephyr,vref-mv = <3300>;
};
};

&gpio {
status = "okay";
};
Expand Down
6 changes: 6 additions & 0 deletions doc/releases/migration-guide-4.3.rst
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Expand Up @@ -61,6 +61,12 @@ Device Drivers and Devicetree

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

ADC
===

* ``iadc_gecko.c`` driver is deprecated, consider using ``adc_silabs_iadc.c`` instead.
:dtcompatible:`silabs,gecko-iadc` has been replaced by :dtcompatible:`silabs,iadc`.

Comparator
==========

Expand Down
1 change: 1 addition & 0 deletions drivers/adc/CMakeLists.txt
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Expand Up @@ -45,6 +45,7 @@ zephyr_library_sources_ifdef(CONFIG_ADC_XMC4XXX adc_xmc4xxx.c)
zephyr_library_sources_ifdef(CONFIG_ADC_ESP32 adc_esp32.c)
zephyr_library_sources_ifdef(CONFIG_ADC_GECKO_ADC adc_gecko.c)
zephyr_library_sources_ifdef(CONFIG_ADC_GECKO_IADC iadc_gecko.c)
zephyr_library_sources_ifdef(CONFIG_ADC_SILABS_IADC adc_silabs_iadc.c)
zephyr_library_sources_ifdef(CONFIG_ADC_SILABS_SIWX91X adc_silabs_siwx91x.c)
zephyr_library_sources_ifdef(CONFIG_ADC_INFINEON_CAT1 adc_ifx_cat1.c)
zephyr_library_sources_ifdef(CONFIG_ADC_SMARTBOND_GPADC adc_smartbond_gpadc.c)
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2 changes: 2 additions & 0 deletions drivers/adc/Kconfig
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Expand Up @@ -136,6 +136,8 @@ source "drivers/adc/Kconfig.gecko"

source "drivers/adc/Kconfig.siwx91x"

source "drivers/adc/Kconfig.silabs"

source "drivers/adc/Kconfig.ifx_cat1"

source "drivers/adc/Kconfig.smartbond"
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1 change: 1 addition & 0 deletions drivers/adc/Kconfig.gecko
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Expand Up @@ -9,6 +9,7 @@ config ADC_GECKO_IADC
depends on DT_HAS_SILABS_GECKO_IADC_ENABLED
select SOC_GECKO_IADC
select ADC_CONFIGURABLE_INPUTS
select DEPRECATED
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Add [deprecated] in the prompt as well, and direct the user in the help to the driver that shall be used.
And the driver should be disabled by default.

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I think it could stay on enabled by default because if a user don't explicitly return to the old bindings, the symbol will not be selected.

help
Enable the driver implementation for the Silabs GeckoEXX32 Incremental ADC

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20 changes: 20 additions & 0 deletions drivers/adc/Kconfig.silabs
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@@ -0,0 +1,20 @@
# Copyright (c) 2025 Silicon Laboratories Inc.
# SPDX-License-Identifier: Apache-2.0

config ADC_SILABS_IADC
bool "Silabs Incremental ADC driver"
default y
depends on DT_HAS_SILABS_IADC_ENABLED
select SILABS_SISDK_IADC
select ADC_CONFIGURABLE_INPUTS
help
Enable the driver implementation for Silabs Incremental ADC

config ADC_SILABS_IADC_DMA
bool "Silabs IADC async DMA support"
depends on ADC_SILABS_IADC
depends on DMA
help
Enable DMA support with the Silabs IADC driver.
This allows ADC conversions to be performed (asynchronously or not)
using DMA for improved performance.
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