2019-09-13 15:41:28

by Fabrice Gasnier

Subject: [PATCH 0/3] Add support for ADC on stm32mp157a-dk1

This series adds support for ADC on stm32mp157a-dk1 board:
- enable vrefbuf regulator used as reference voltage
- define ADC pins for AIN connector and USB Type-C CC pins
- configure ADC1 and ADC2 to use these

Fabrice Gasnier (3):
ARM: dts: stm32: Enable VREFBUF on stm32mp157a-dk1
ARM: dts: stm32: add ADC pins used on stm32mp157a-dk1
ARM: dts: stm32: enable ADC support on stm32mp157a-dk1

arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 16 +++++++++++++++
arch/arm/boot/dts/stm32mp157a-dk1.dts | 34 +++++++++++++++++++++++++++++++
2 files changed, 50 insertions(+)

--
2.7.4

2019-09-13 19:04:30

by Fabrice Gasnier

Subject: [PATCH 2/3] ARM: dts: stm32: add ADC pins used on stm32mp157a-dk1

Define pins that can be used for ADC on stm32mp157a-dk1 board:
- AIN connector has ADC input pins
- USB Type-C CC1 & CC2 pins (e.g. in18, in19)

Signed-off-by: Fabrice Gasnier <[email protected]>
---
arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
index e4a0d51..eeb60d0 100644
--- a/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp157-pinctrl.dtsi
@@ -137,6 +137,22 @@
status = "disabled";
};

+ adc12_ain_pins_a: adc12-ain-0 {
+ pins {
+ pinmux = <STM32_PINMUX('C', 3, ANALOG)>, /* ADC1 in13 */
+ <STM32_PINMUX('F', 12, ANALOG)>, /* ADC1 in6 */
+ <STM32_PINMUX('F', 13, ANALOG)>, /* ADC2 in2 */
+ <STM32_PINMUX('F', 14, ANALOG)>; /* ADC2 in6 */
+ };
+ };
+
+ adc12_usb_cc_pins_a: adc12-usb-cc-pins-0 {
+ pins {
+ pinmux = <STM32_PINMUX('A', 4, ANALOG)>, /* ADC12 in18 */
+ <STM32_PINMUX('A', 5, ANALOG)>; /* ADC12 in19 */
+ };
+ };
+
cec_pins_a: cec-0 {
pins {
pinmux = <STM32_PINMUX('A', 15, AF4)>;
--
2.7.4

2019-09-14 00:05:22

by Fabrice Gasnier

Subject: [PATCH 1/3] ARM: dts: stm32: Enable VREFBUF on stm32mp157a-dk1

Enable VREFBUF as ADC/DAC uses it on stm32mp157a-dk1 board.

Signed-off-by: Fabrice Gasnier <[email protected]>
---
arch/arm/boot/dts/stm32mp157a-dk1.dts | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/arch/arm/boot/dts/stm32mp157a-dk1.dts b/arch/arm/boot/dts/stm32mp157a-dk1.dts
index 0615d1c..ebd9f33 100644
--- a/arch/arm/boot/dts/stm32mp157a-dk1.dts
+++ b/arch/arm/boot/dts/stm32mp157a-dk1.dts
@@ -449,3 +449,10 @@
pinctrl-0 = <&uart4_pins_a>;
status = "okay";
};
+
+&vrefbuf {
+ regulator-min-microvolt = <2500000>;
+ regulator-max-microvolt = <2500000>;
+ vdda-supply = <&vdd>;
+ status = "okay";
+};
--
2.7.4

2019-10-03 10:13:17

by Alexandre Torgue

Subject: Re: [PATCH 0/3] Add support for ADC on stm32mp157a-dk1

Hi Fabrice

On 9/13/19 4:34 PM, Fabrice Gasnier wrote:
> This series adds support for ADC on stm32mp157a-dk1 board:
> - enable vrefbuf regulator used as reference voltage
> - define ADC pins for AIN connector and USB Type-C CC pins
> - configure ADC1 and ADC2 to use these
>
> Fabrice Gasnier (3):
> ARM: dts: stm32: Enable VREFBUF on stm32mp157a-dk1
> ARM: dts: stm32: add ADC pins used on stm32mp157a-dk1
> ARM: dts: stm32: enable ADC support on stm32mp157a-dk1
>
> arch/arm/boot/dts/stm32mp157-pinctrl.dtsi | 16 +++++++++++++++
> arch/arm/boot/dts/stm32mp157a-dk1.dts | 34 +++++++++++++++++++++++++++++++
> 2 files changed, 50 insertions(+)
>

Series applied on stm32-next.

Regards
Alex