| From 8a81ff173c5c9a0ab1df84fab17971dbcce8490a Mon Sep 17 00:00:00 2001 |
| From: David Lechner <david@lechnology.com> |
| Date: Tue, 7 Feb 2017 13:22:07 -0600 |
| Subject: ARM: da850-lego-ev3: Add device tree node for A/DC |
| |
| This adds a node for the TI ADS7957 analog/digital converter on LEGO |
| MINDSTORMS EV3 as well as a regulator node that is used by the A/DC node. |
| |
| Signed-off-by: David Lechner <david@lechnology.com> |
| Signed-off-by: Sekhar Nori <nsekhar@ti.com> |
| --- |
| arch/arm/boot/dts/da850-lego-ev3.dts | 21 +++++++++++++++++++++ |
| 1 file changed, 21 insertions(+) |
| |
| diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts |
| index 112ec92..0309537 100644 |
| --- a/arch/arm/boot/dts/da850-lego-ev3.dts |
| +++ b/arch/arm/boot/dts/da850-lego-ev3.dts |
| @@ -139,6 +139,19 @@ |
| enable-active-high; |
| regulator-boot-on; |
| }; |
| + |
| + /* |
| + * This is a simple voltage divider on VCC5V to provide a 2.5V |
| + * reference signal to the ADC. |
| + */ |
| + adc_ref: regulator2 { |
| + compatible = "regulator-fixed"; |
| + regulator-name = "adc ref"; |
| + regulator-min-microvolt = <2500000>; |
| + regulator-max-microvolt = <2500000>; |
| + regulator-boot-on; |
| + vin-supply = <&vcc5v>; |
| + }; |
| }; |
| |
| &pmx_core { |
| @@ -293,6 +306,14 @@ |
| }; |
| }; |
| }; |
| + |
| + adc: adc@3 { |
| + compatible = "ti,ads7957"; |
| + reg = <3>; |
| + #io-channel-cells = <1>; |
| + spi-max-frequency = <10000000>; |
| + vref-supply = <&adc_ref>; |
| + }; |
| }; |
| |
| &gpio { |
| -- |
| cgit v1.1 |
| |
