1 From f6a9afad8ed6521991c138caf7f20fd5222c2a5a Mon Sep 17 00:00:00 2001
2 From: Scott Ellis <scott@jumpnowtek.com>
3 Date: Fri, 27 Jan 2017 06:42:42 -0500
4 Subject: [PATCH] Add overlay for mcp3008 adc (#1818)
10 dtoverlay=mcp3008:spi0-0-present
14 dtoverlay=mcp3008:spi0-1-present
18 dtoverlay=mcp3008:spi0-0-present,spi0-1-present
23 dtoverlay=mcp3008:spi1-0-present
27 dtoverlay=spi1-1cs:cs0_pin=16
28 dtoverlay=mcp3008:spi1-0-present
32 dtoverlay=mcp3008:spi1-0-present,spi1-1-present
38 dtoverlay=mcp3008:spi0-0-present,spi0-0-speed=2000000
40 arch/arm/boot/dts/overlays/Makefile | 1 +
41 arch/arm/boot/dts/overlays/README | 9 ++
42 arch/arm/boot/dts/overlays/mcp3008-overlay.dts | 205 +++++++++++++++++++++++++
43 3 files changed, 215 insertions(+)
44 create mode 100755 arch/arm/boot/dts/overlays/mcp3008-overlay.dts
46 diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
47 index 72f2d90a..b13e340 100644
48 --- a/arch/arm/boot/dts/overlays/Makefile
49 +++ b/arch/arm/boot/dts/overlays/Makefile
50 @@ -57,6 +57,7 @@ dtbo-$(RPI_DT_OVERLAYS) += mcp23017.dtbo
51 dtbo-$(RPI_DT_OVERLAYS) += mcp23s17.dtbo
52 dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.dtbo
53 dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo
54 +dtbo-$(RPI_DT_OVERLAYS) += mcp3008.dtbo
55 dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo
56 dtbo-$(RPI_DT_OVERLAYS) += mz61581.dtbo
57 dtbo-$(RPI_DT_OVERLAYS) += pi3-act-led.dtbo
58 diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
59 index 7f4bd29..72601f8 100644
60 --- a/arch/arm/boot/dts/overlays/README
61 +++ b/arch/arm/boot/dts/overlays/README
62 @@ -736,6 +736,15 @@ Params: oscillator Clock frequency for the CAN controller (Hz)
63 interrupt GPIO for interrupt signal
67 +Info: Configures MCP3008 A/D converters
68 + For devices on spi1 or spi2, the interfaces should be enabled
69 + with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
70 +Load: dtoverlay=mcp3008,<param>[=<val>]
71 +Params: spi<n>-<m>-present boolean, configure device at spi<n>, cs<m>
72 + spi<n>-<m>-speed integer, set the spi bus speed for this device
76 Info: Selects the bcm2835-mmc SD/MMC driver, optionally with overclock
77 Load: dtoverlay=mmc,<param>=<val>
78 diff --git a/arch/arm/boot/dts/overlays/mcp3008-overlay.dts b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts
80 index 0000000..06bf426
82 +++ b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts
85 + * Device tree overlay for Microchip mcp3008 10-Bit A/D Converters
92 + compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
95 + target = <&spidev0>;
97 + status = "disabled";
102 + target = <&spidev1>;
104 + status = "disabled";
109 + target-path = "spi1/spidev@0";
111 + status = "disabled";
116 + target-path = "spi1/spidev@1";
118 + status = "disabled";
123 + target-path = "spi1/spidev@2";
125 + status = "disabled";
130 + target-path = "spi2/spidev@0";
132 + status = "disabled";
137 + target-path = "spi2/spidev@1";
139 + status = "disabled";
144 + target-path = "spi2/spidev@2";
146 + status = "disabled";
154 + #address-cells = <1>;
157 + mcp3008_00: mcp3008@0 {
158 + compatible = "mcp3008";
160 + spi-max-frequency = <1600000>;
169 + #address-cells = <1>;
172 + mcp3008_01: mcp3008@1 {
173 + compatible = "mcp3008";
175 + spi-max-frequency = <1600000>;
184 + #address-cells = <1>;
187 + mcp3008_10: mcp3008@0 {
188 + compatible = "mcp3008";
190 + spi-max-frequency = <1600000>;
199 + #address-cells = <1>;
202 + mcp3008_11: mcp3008@1 {
203 + compatible = "mcp3008";
205 + spi-max-frequency = <1600000>;
214 + #address-cells = <1>;
217 + mcp3008_12: mcp3008@2 {
218 + compatible = "mcp3008";
220 + spi-max-frequency = <1600000>;
229 + #address-cells = <1>;
232 + mcp3008_20: mcp3008@0 {
233 + compatible = "mcp3008";
235 + spi-max-frequency = <1600000>;
244 + #address-cells = <1>;
247 + mcp3008_21: mcp3008@1 {
248 + compatible = "mcp3008";
250 + spi-max-frequency = <1600000>;
259 + #address-cells = <1>;
262 + mcp3008_22: mcp3008@2 {
263 + compatible = "mcp3008";
265 + spi-max-frequency = <1600000>;
271 + spi0-0-present = <0>, "+0+8";
272 + spi0-1-present = <0>, "+1+9";
273 + spi1-0-present = <0>, "+2+10";
274 + spi1-1-present = <0>, "+3+11";
275 + spi1-2-present = <0>, "+4+12";
276 + spi2-0-present = <0>, "+5+13";
277 + spi2-1-present = <0>, "+6+14";
278 + spi2-2-present = <0>, "+7+15";
279 + spi0-0-speed = <&mcp3008_00>, "spi-max-frequency:0";
280 + spi0-1-speed = <&mcp3008_01>, "spi-max-frequency:0";
281 + spi1-0-speed = <&mcp3008_10>, "spi-max-frequency:0";
282 + spi1-1-speed = <&mcp3008_11>, "spi-max-frequency:0";
283 + spi1-2-speed = <&mcp3008_12>, "spi-max-frequency:0";
284 + spi2-0-speed = <&mcp3008_20>, "spi-max-frequency:0";
285 + spi2-1-speed = <&mcp3008_21>, "spi-max-frequency:0";
286 + spi2-2-speed = <&mcp3008_22>, "spi-max-frequency:0";