@@ -97,6 +97,33 @@
};
};
+&adc {
+ pinctrl-names = "default";
+ pinctrl-0 = <&adc12_ain_pins_a>, <&adc12_usb_cc_pins_a>;
+ vdd-supply = <&vdd>;
+ vdda-supply = <&vdd>;
+ vref-supply = <&vrefbuf>;
+ status = "disabled";
+ 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. 5us).
+ */
+ st,min-sample-time-nsecs = <5000>;
+ /* AIN connector, USB Type-C CC1 & CC2 */
+ st,adc-channels = <0 1 6 13 18 19>;
+ status = "okay";
+ };
+ adc2: adc@100 {
+ /* AIN connector, USB Type-C CC1 & CC2 */
+ st,adc-channels = <0 1 2 6 18 19>;
+ st,min-sample-time-nsecs = <5000>;
+ status = "okay";
+ };
+};
+
&cec {
pinctrl-names = "default", "sleep";
pinctrl-0 = <&cec_pins_b>;
Configure ADC support on stm32mp157a-dk1. It can be used for various purpose: - AIN connector has several analog inputs: ANA0, ANA1, ADC2 in6 & in2, ADC1 in13 & in6 - USB Type-C CC1 & CC2 pins wired to in18 & in19 It's easier then to Configure them all. But keep them disabled by default, so the pins are kept in their initial state to lower power consumption. This way they can also be used as GPIO. Add VDD and VDDA supplies to ADC on stm32mp157c-dk1 board. This allows to get full ADC analog performances in case VDDA is below 2.7V (not the case by default). Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> --- arch/arm/boot/dts/stm32mp157a-dk1.dts | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+)