diff mbox series

[v2,1/9] ARM: dts: stm32: add adc internal channels to stm32mp15

Message ID 20230530124538.621760-2-olivier.moysan@foss.st.com
State New
Headers
Series ARM: dts: stm32: add adc internal channels on stm32mp15 |

Commit Message

Olivier MOYSAN May 30, 2023, 12:45 p.m. UTC 
  Add STM32 ADC2 internal channels VREFINT and VDDCORE to STM32MP15x SoCs.
VBAT internal channel is not defined by default in SoC DT, and
has be defined in board DT when needed, instead. This avoids unwanted
current consumption on battery, when ADC conversions are performed
on any other channels.

The internal channels are defined in STM32MP15 SoC DT according to the
generic IIO channel bindings. The STM32 driver does not support a mixed
use of legacy and generic channels. When generic channels are defined,
legacy channels are ignored. This involves that the board device trees
using legacy bindings for ADC2, have to be reworked.

Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com>
---
 arch/arm/boot/dts/stm32mp151.dtsi | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index bf3830dca742..7b360ee1ba2b 100644
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1093,6 +1093,8 @@  adc: adc@48003000 {
 			adc1: adc@0 {
 				compatible = "st,stm32mp1-adc";
 				#io-channel-cells = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 				reg = <0x0>;
 				interrupt-parent = <&adc>;
 				interrupts = <0>;
@@ -1104,12 +1106,22 @@  adc1: adc@0 {
 			adc2: adc@100 {
 				compatible = "st,stm32mp1-adc";
 				#io-channel-cells = <1>;
+				#address-cells = <1>;
+				#size-cells = <0>;
 				reg = <0x100>;
 				interrupt-parent = <&adc>;
 				interrupts = <1>;
 				dmas = <&dmamux1 10 0x400 0x01>;
 				dma-names = "rx";
 				status = "disabled";
+				channel@13 {
+					reg = <13>;
+					label = "vrefint";
+				};
+				channel@14 {
+					reg = <14>;
+					label = "vddcore";
+				};
 			};
 		};