From e46a180c060f5a025aee783ef10bcb95b767f6f8 Mon Sep 17 00:00:00 2001 From: Olivier Moysan Date: Wed, 12 Oct 2022 16:22:05 +0200 Subject: [PATCH] ARM: dts: stm32: add adc support on stm32mp135f-dk Configure ADC support on stm32mp135f-dk. ADC can be used for USB Type-C CC1 & CC2 pins wired to in6 & in12. Signed-off-by: Olivier Moysan Signed-off-by: Alexandre Torgue --- arch/arm/boot/dts/stm32mp135f-dk.dts | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/arm/boot/dts/stm32mp135f-dk.dts b/arch/arm/boot/dts/stm32mp135f-dk.dts index c1c4b5a..a87ab06 100644 --- a/arch/arm/boot/dts/stm32mp135f-dk.dts +++ b/arch/arm/boot/dts/stm32mp135f-dk.dts @@ -76,6 +76,31 @@ }; }; +&adc_1 { + pinctrl-names = "default"; + pinctrl-0 = <&adc1_usb_cc_pins_a>; + vdda-supply = <&vdd_adc>; + vref-supply = <&vdd_adc>; + status = "okay"; + adc1: adc@0 { + status = "okay"; + /* + * Type-C USB_PWR_CC1 & USB_PWR_CC2 on in6 & in12. + * Use at least 5 * RC time, e.g. 5 * (Rp + Rd) * C: + * 5 * (5.1 + 47kOhms) * 5pF => 1.3us. + * Use arbitrary margin here (e.g. 5us). + */ + channel@6 { + reg = <6>; + st,min-sample-time-ns = <5000>; + }; + channel@12 { + reg = <12>; + st,min-sample-time-ns = <5000>; + }; + }; +}; + &i2c1 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c1_pins_a>; -- 2.7.4