diff options
| author |   David Lechner <david@lechnology.com> | 2017-02-07 13:22:07 -0600 |
|---|---|---|
| committer |   Sekhar Nori <nsekhar@ti.com> | 2017-03-07 15:34:08 +0530 |
| commit | 8a81ff173c5c9a0ab1df84fab17971dbcce8490a (patch) | |
| tree | 6742209aa23e46d93de2d57ef556947c7b71697e | |
| parent | Linux 4.11-rc1 (diff) | |
| download | wireguard-linux-8a81ff173c5c9a0ab1df84fab17971dbcce8490a.tar.xz wireguard-linux-8a81ff173c5c9a0ab1df84fab17971dbcce8490a.zip | |
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>
| -rw-r--r-- | arch/arm/boot/dts/da850-lego-ev3.dts | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/da850-lego-ev3.dts b/arch/arm/boot/dts/da850-lego-ev3.dts index 112ec92064ce..03095372ce68 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 { |