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- 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
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