diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.9/0193-Add-overlay-for-ads1115-ADCs-1864.patch | 159 |
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"; ++ }; ++}; |