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-rw-r--r--target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch159
1 files changed, 159 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch b/target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch
new file mode 100644
index 0000000000..39d48e60b3
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch
@@ -0,0 +1,159 @@
+From 6d5e32067cf3f3169ec15097c175878de365d247 Mon Sep 17 00:00:00 2001
+From: Scott Ellis <scott@jumpnowtek.com>
+Date: Wed, 1 Mar 2017 07:22:24 -0500
+Subject: [PATCH] Add overlay for ads1115 ADCs (#1864)
+
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 22 ++++++
+ arch/arm/boot/dts/overlays/ads1115-overlay.dts | 103 +++++++++++++++++++++++++
+ 3 files changed, 126 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/ads1115-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -4,6 +4,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ adau1977-adc.dtbo \
+ adau7002-simple.dtbo \
+ ads1015.dtbo \
++ ads1115.dtbo \
+ ads7846.dtbo \
+ akkordion-iqdacplus.dtbo \
+ allo-piano-dac-pcm512x-audio.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -196,6 +196,28 @@ Params: addr I2C bus
+ http://www.ti.com/lit/ds/symlink/ads1015.pdf
+
+
++Name: ads1115
++Info: Texas Instruments ADS1115 ADC
++Load: dtoverlay=ads1115,<param>[=<val>]
++Params: addr I2C bus address of device. Set based on how the
++ addr pin is wired. (default=0x48 assumes addr
++ is pulled to GND)
++ cha_enable Enable virtual channel a.
++ cha_cfg Set the configuration for virtual channel a.
++ (default=4 configures this channel for the
++ voltage at A0 with respect to GND)
++ cha_datarate Set the datarate (samples/sec) for this channel.
++ (default=7 sets 860 sps)
++ cha_gain Set the gain of the Programmable Gain
++ Amplifier for this channel. (Default 1 sets the
++ full scale of the channel to 4.096 Volts)
++
++ Channel parameters can be set for each enabled channel.
++ A maximum of 4 channels can be enabled (letters a thru d).
++ For more information refer to the device datasheet at:
++ http://www.ti.com/lit/ds/symlink/ads1115.pdf
++
++
+ Name: ads7846
+ Info: ADS7846 Touch controller
+ Load: dtoverlay=ads7846,<param>=<val>
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/ads1115-overlay.dts
+@@ -0,0 +1,103 @@
++/*
++ * TI ADS1115 multi-channel ADC overlay
++ */
++
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2708";
++
++ fragment@0 {
++ target = <&i2c_arm>;
++ __overlay__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ status = "okay";
++
++ ads1115: ads1115 {
++ compatible = "ti,ads1115";
++ status = "okay";
++ #address-cells = <1>;
++ #size-cells = <0>;
++ reg = <0x48>;
++ };
++ };
++ };
++
++ fragment@1 {
++ target-path = "i2c_arm/ads1115";
++ __dormant__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ channel_a: channel_a {
++ reg = <4>;
++ ti,gain = <1>;
++ ti,datarate = <7>;
++ };
++ };
++ };
++
++ fragment@2 {
++ target-path = "i2c_arm/ads1115";
++ __dormant__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ channel_b: channel_b {
++ reg = <5>;
++ ti,gain = <1>;
++ ti,datarate = <7>;
++ };
++ };
++ };
++
++ fragment@3 {
++ target-path = "i2c_arm/ads1115";
++ __dormant__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ channel_c: channel_c {
++ reg = <6>;
++ ti,gain = <1>;
++ ti,datarate = <7>;
++ };
++ };
++ };
++
++ fragment@4 {
++ target-path = "i2c_arm/ads1115";
++ __dormant__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++
++ channel_d: channel_d {
++ reg = <7>;
++ ti,gain = <1>;
++ ti,datarate = <7>;
++ };
++ };
++ };
++
++ __overrides__ {
++ addr = <&ads1115>,"reg:0";
++ cha_enable = <0>,"=1";
++ cha_cfg = <&channel_a>,"reg:0";
++ cha_gain = <&channel_a>,"ti,gain:0";
++ cha_datarate = <&channel_a>,"ti,datarate:0";
++ chb_enable = <0>,"=2";
++ chb_cfg = <&channel_b>,"reg:0";
++ chb_gain = <&channel_b>,"ti,gain:0";
++ chb_datarate = <&channel_b>,"ti,datarate:0";
++ chc_enable = <0>,"=3";
++ chc_cfg = <&channel_c>,"reg:0";
++ chc_gain = <&channel_c>,"ti,gain:0";
++ chc_datarate = <&channel_c>,"ti,datarate:0";
++ chd_enable = <0>,"=4";
++ chd_cfg = <&channel_d>,"reg:0";
++ chd_gain = <&channel_d>,"ti,gain:0";
++ chd_datarate = <&channel_d>,"ti,datarate:0";
++ };
++};