Add adc related nodes. These nodes are used to detect the current supplied by USB type-C power in port on DK1 and DK2 boards.
Signed-off-by: Patrice Chotard patrice.chotard@st.com ---
arch/arm/dts/stm32mp157-pinctrl.dtsi | 7 +++++++ arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi | 21 +++++++++++++++++++++ 2 files changed, 28 insertions(+)
diff --git a/arch/arm/dts/stm32mp157-pinctrl.dtsi b/arch/arm/dts/stm32mp157-pinctrl.dtsi index 4d2bf33be7d4..c06987548612 100644 --- a/arch/arm/dts/stm32mp157-pinctrl.dtsi +++ b/arch/arm/dts/stm32mp157-pinctrl.dtsi @@ -148,6 +148,13 @@ gpio-ranges = <&pinctrl 0 160 8>; };
+ adc12_usb_pwr_pins_a: adc12-usb-pwr-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)>; diff --git a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi index f6cf35648abf..54ecb3ccaa5e 100644 --- a/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi +++ b/arch/arm/dts/stm32mp157a-dk1-u-boot.dtsi @@ -31,6 +31,27 @@ }; };
+&adc { + pinctrl-names = "default"; + pinctrl-0 = <&adc12_usb_pwr_pins_a>; + vdd-supply = <&vdd>; + vdda-supply = <&vdd>; + vref-supply = <&vrefbuf>; + status = "okay"; + adc1: adc@0 { + /* + * Type-C USB_PWR_CC1 & USB_PWR_CC2 on in18 & in19. + * Use at least 5 * RC time, e.g. 5 * (Rp + Rd) * C: + * 5 * (56 + 47kOhms) * 5pF => 2.5us. + * Use arbitrary margin here (e.g. 5µs). + */ + st,min-sample-time-nsecs = <5000>; + /* ANA0, ANA1, USB Type-C CC1 & CC2 */ + st,adc-channels = <0 1 18 19>; + status = "okay"; + }; +}; + &clk_hse { st,digbypass; };