diff options
Diffstat (limited to 'board/lego/ev3/patches/linux/0001-adc-device-tree-node.patch')
| -rw-r--r-- | board/lego/ev3/patches/linux/0001-adc-device-tree-node.patch | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/board/lego/ev3/patches/linux/0001-adc-device-tree-node.patch b/board/lego/ev3/patches/linux/0001-adc-device-tree-node.patch new file mode 100644 index 0000000000..dabda1e962 --- /dev/null +++ b/board/lego/ev3/patches/linux/0001-adc-device-tree-node.patch @@ -0,0 +1,56 @@ +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 + |
