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.chot...@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;
};
--
1.9.1
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