diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0576-Add-overlay-for-mcp3008-adc-1818.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.4/0576-Add-overlay-for-mcp3008-adc-1818.patch | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0576-Add-overlay-for-mcp3008-adc-1818.patch b/target/linux/brcm2708/patches-4.4/0576-Add-overlay-for-mcp3008-adc-1818.patch new file mode 100644 index 0000000..ba30583 --- /dev/null +++ b/target/linux/brcm2708/patches-4.4/0576-Add-overlay-for-mcp3008-adc-1818.patch @@ -0,0 +1,291 @@ +From f6a9afad8ed6521991c138caf7f20fd5222c2a5a Mon Sep 17 00:00:00 2001 +From: Scott Ellis <scott@jumpnowtek.com> +Date: Fri, 27 Jan 2017 06:42:42 -0500 +Subject: [PATCH] Add overlay for mcp3008 adc (#1818) + +Some example usage: + +SPI0.0 +dtparam=spi=on +dtoverlay=mcp3008:spi0-0-present + +SPI0.1 +dtparam=spi=on +dtoverlay=mcp3008:spi0-1-present + +SPI0.0 and SPI0.1 +dtparam=spi=on +dtoverlay=mcp3008:spi0-0-present,spi0-1-present + +SPI1.0 +dtparam=spi=on +dtoverlay=spi1-1cs +dtoverlay=mcp3008:spi1-0-present + +SPI1.2 +dtparam=spi=on +dtoverlay=spi1-1cs:cs0_pin=16 +dtoverlay=mcp3008:spi1-0-present + +SPI1.0 and SPI1.1 +dtoverlay=spi1-2cs +dtoverlay=mcp3008:spi1-0-present,spi1-1-present + +Changing the speed + +SPI0.0 +dtparam=spi=on +dtoverlay=mcp3008:spi0-0-present,spi0-0-speed=2000000 +--- + arch/arm/boot/dts/overlays/Makefile | 1 + + arch/arm/boot/dts/overlays/README | 9 ++ + arch/arm/boot/dts/overlays/mcp3008-overlay.dts | 205 +++++++++++++++++++++++++ + 3 files changed, 215 insertions(+) + create mode 100755 arch/arm/boot/dts/overlays/mcp3008-overlay.dts + +diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile +index 72f2d90a..b13e340 100644 +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -57,6 +57,7 @@ dtbo-$(RPI_DT_OVERLAYS) += mcp23017.dtbo + dtbo-$(RPI_DT_OVERLAYS) += mcp23s17.dtbo + dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.dtbo + dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo ++dtbo-$(RPI_DT_OVERLAYS) += mcp3008.dtbo + dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo + dtbo-$(RPI_DT_OVERLAYS) += mz61581.dtbo + dtbo-$(RPI_DT_OVERLAYS) += pi3-act-led.dtbo +diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README +index 7f4bd29..72601f8 100644 +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -736,6 +736,15 @@ Params: oscillator Clock frequency for the CAN controller (Hz) + interrupt GPIO for interrupt signal + + ++Name: mcp3008 ++Info: Configures MCP3008 A/D converters ++ For devices on spi1 or spi2, the interfaces should be enabled ++ with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays. ++Load: dtoverlay=mcp3008,<param>[=<val>] ++Params: spi<n>-<m>-present boolean, configure device at spi<n>, cs<m> ++ spi<n>-<m>-speed integer, set the spi bus speed for this device ++ ++ + Name: mmc + Info: Selects the bcm2835-mmc SD/MMC driver, optionally with overclock + Load: dtoverlay=mmc,<param>=<val> +diff --git a/arch/arm/boot/dts/overlays/mcp3008-overlay.dts b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts +new file mode 100755 +index 0000000..06bf426 +--- /dev/null ++++ b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts +@@ -0,0 +1,205 @@ ++/* ++ * Device tree overlay for Microchip mcp3008 10-Bit A/D Converters ++ */ ++ ++/dts-v1/; ++/plugin/; ++ ++/ { ++ compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709"; ++ ++ fragment@0 { ++ target = <&spidev0>; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@1 { ++ target = <&spidev1>; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@2 { ++ target-path = "spi1/spidev@0"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@3 { ++ target-path = "spi1/spidev@1"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@4 { ++ target-path = "spi1/spidev@2"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@5 { ++ target-path = "spi2/spidev@0"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@6 { ++ target-path = "spi2/spidev@1"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@7 { ++ target-path = "spi2/spidev@2"; ++ __dormant__ { ++ status = "disabled"; ++ }; ++ }; ++ ++ fragment@8 { ++ target = <&spi0>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_00: mcp3008@0 { ++ compatible = "mcp3008"; ++ reg = <0>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@9 { ++ target = <&spi0>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_01: mcp3008@1 { ++ compatible = "mcp3008"; ++ reg = <1>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@10 { ++ target = <&spi1>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_10: mcp3008@0 { ++ compatible = "mcp3008"; ++ reg = <0>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@11 { ++ target = <&spi1>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_11: mcp3008@1 { ++ compatible = "mcp3008"; ++ reg = <1>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@12 { ++ target = <&spi1>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_12: mcp3008@2 { ++ compatible = "mcp3008"; ++ reg = <2>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@13 { ++ target = <&spi2>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_20: mcp3008@0 { ++ compatible = "mcp3008"; ++ reg = <0>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@14 { ++ target = <&spi2>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_21: mcp3008@1 { ++ compatible = "mcp3008"; ++ reg = <1>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ fragment@15 { ++ target = <&spi2>; ++ __dormant__ { ++ status = "okay"; ++ #address-cells = <1>; ++ #size-cells = <0>; ++ ++ mcp3008_22: mcp3008@2 { ++ compatible = "mcp3008"; ++ reg = <2>; ++ spi-max-frequency = <1600000>; ++ }; ++ }; ++ }; ++ ++ __overrides__ { ++ spi0-0-present = <0>, "+0+8"; ++ spi0-1-present = <0>, "+1+9"; ++ spi1-0-present = <0>, "+2+10"; ++ spi1-1-present = <0>, "+3+11"; ++ spi1-2-present = <0>, "+4+12"; ++ spi2-0-present = <0>, "+5+13"; ++ spi2-1-present = <0>, "+6+14"; ++ spi2-2-present = <0>, "+7+15"; ++ spi0-0-speed = <&mcp3008_00>, "spi-max-frequency:0"; ++ spi0-1-speed = <&mcp3008_01>, "spi-max-frequency:0"; ++ spi1-0-speed = <&mcp3008_10>, "spi-max-frequency:0"; ++ spi1-1-speed = <&mcp3008_11>, "spi-max-frequency:0"; ++ spi1-2-speed = <&mcp3008_12>, "spi-max-frequency:0"; ++ spi2-0-speed = <&mcp3008_20>, "spi-max-frequency:0"; ++ spi2-1-speed = <&mcp3008_21>, "spi-max-frequency:0"; ++ spi2-2-speed = <&mcp3008_22>, "spi-max-frequency:0"; ++ }; ++}; +-- +2.1.4 + |