diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0386-Add-ads1015-overlay.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0386-Add-ads1015-overlay.patch | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0386-Add-ads1015-overlay.patch b/target/linux/brcm2708/patches-4.4/0386-Add-ads1015-overlay.patch new file mode 100644 index 0000000000..ebdedcd714 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0386-Add-ads1015-overlay.patch @@ -0,0 +1,155 @@ +From 940b863512662c2da10729fbb6d57fe072c9b887 Mon Sep 17 00:00:00 2001 +From: Erik Sejr <erik@eriks.ssimicro.com> +Date: Tue, 7 Jun 2016 20:58:17 -0400 +Subject: [PATCH] Add ads1015 overlay + +See: https://github.com/raspberrypi/linux/pull/1520 +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 22 ++++++ + arch/arm/boot/dts/overlays/ads1015-overlay.dts | 98 ++++++++++++++++++++++++++ + 3 files changed, 121 insertions(+) + create mode 100644 arch/arm/boot/dts/overlays/ads1015-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y) + endif + + dtbo-$(RPI_DT_OVERLAYS) += adau1977-adc.dtbo ++dtbo-$(RPI_DT_OVERLAYS) += ads1015.dtbo + dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo + dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo + dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -168,6 +168,28 @@ Load: dtoverlay=adau1977-adc + Params: <None> + + ++Name: ads1015 ++Info: Overlay for activation of Texas Instruments ADS1015 ADC over I2C ++Load: dtoverlay=ads1015,<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. (default=true) ++ 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=4 sets 1600 sps) ++ cha_gain Set the gain of the Programmable Gain ++ Amplifier for this channel. (default=2 sets the ++ full scale of the channel to 2.048 Volts) ++ ++ Channel (ch) 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/ads1015.pdf ++ ++ + Name: ads7846 + Info: ADS7846 Touch controller + Load: dtoverlay=ads7846,<param>=<val> +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/ads1015-overlay.dts +@@ -0,0 +1,98 @@ ++/* ++ * 2016 - Erik Sejr ++ */ ++/dts-v1/; ++/plugin/; ++ ++/ { ++ compatible = "brcm,bcm2708"; ++ /* ----------- ADS1015 ------------ */ ++ fragment@0 { ++ target = <&i2c_arm>; ++ __overlay__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ status = "okay"; ++ ads1015: ads1015 { ++ compatible = "ti,ads1015"; ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ reg = <0x48>; ++ }; ++ }; ++ }; ++ ++ fragment@1 { ++ target-path = "i2c_arm/ads1015"; ++ __overlay__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ channel_a: channel_a { ++ reg = <4>; ++ ti,gain = <2>; ++ ti,datarate = <4>; ++ }; ++ }; ++ }; ++ ++ fragment@2 { ++ target-path = "i2c_arm/ads1015"; ++ __dormant__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ channel_b: channel_b { ++ reg = <5>; ++ ti,gain = <2>; ++ ti,datarate = <4>; ++ }; ++ }; ++ }; ++ ++ fragment@3 { ++ target-path = "i2c_arm/ads1015"; ++ __dormant__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ channel_c: channel_c { ++ reg = <6>; ++ ti,gain = <2>; ++ ti,datarate = <4>; ++ }; ++ }; ++ }; ++ ++ fragment@4 { ++ target-path = "i2c_arm/ads1015"; ++ __dormant__ { ++ #address-cells = <1>; ++ #size-cells = <0>; ++ channel_d: channel_d { ++ reg = <7>; ++ ti,gain = <2>; ++ ti,datarate = <4>; ++ }; ++ }; ++ }; ++ ++ __overrides__ { ++ addr = <&ads1015>,"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"; ++ }; ++ ++}; |