1 From 33800ba2a14ff23db96fe5ea6e421a731f60c52b 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 --- a/arch/arm/boot/dts/overlays/Makefile
47 +++ b/arch/arm/boot/dts/overlays/Makefile
48 @@ -47,6 +47,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
56 --- a/arch/arm/boot/dts/overlays/README
57 +++ b/arch/arm/boot/dts/overlays/README
58 @@ -742,6 +742,15 @@ Params: oscillator Clock fr
59 interrupt GPIO for interrupt signal
63 +Info: Configures MCP3008 A/D converters
64 + For devices on spi1 or spi2, the interfaces should be enabled
65 + with one of the spi1-1/2/3cs and/or spi2-1/2/3cs overlays.
66 +Load: dtoverlay=mcp3008,<param>[=<val>]
67 +Params: spi<n>-<m>-present boolean, configure device at spi<n>, cs<m>
68 + spi<n>-<m>-speed integer, set the spi bus speed for this device
72 Info: Configures UART0 (ttyAMA0) so that a requested 38.4kbaud actually gets
73 31.25kbaud, the frequency required for MIDI
75 +++ b/arch/arm/boot/dts/overlays/mcp3008-overlay.dts
78 + * Device tree overlay for Microchip mcp3008 10-Bit A/D Converters
85 + compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
88 + target = <&spidev0>;
90 + status = "disabled";
95 + target = <&spidev1>;
97 + status = "disabled";
102 + target-path = "spi1/spidev@0";
104 + status = "disabled";
109 + target-path = "spi1/spidev@1";
111 + status = "disabled";
116 + target-path = "spi1/spidev@2";
118 + status = "disabled";
123 + target-path = "spi2/spidev@0";
125 + status = "disabled";
130 + target-path = "spi2/spidev@1";
132 + status = "disabled";
137 + target-path = "spi2/spidev@2";
139 + status = "disabled";
147 + #address-cells = <1>;
150 + mcp3008_00: mcp3008@0 {
151 + compatible = "mcp3008";
153 + spi-max-frequency = <1600000>;
162 + #address-cells = <1>;
165 + mcp3008_01: mcp3008@1 {
166 + compatible = "mcp3008";
168 + spi-max-frequency = <1600000>;
177 + #address-cells = <1>;
180 + mcp3008_10: mcp3008@0 {
181 + compatible = "mcp3008";
183 + spi-max-frequency = <1600000>;
192 + #address-cells = <1>;
195 + mcp3008_11: mcp3008@1 {
196 + compatible = "mcp3008";
198 + spi-max-frequency = <1600000>;
207 + #address-cells = <1>;
210 + mcp3008_12: mcp3008@2 {
211 + compatible = "mcp3008";
213 + spi-max-frequency = <1600000>;
222 + #address-cells = <1>;
225 + mcp3008_20: mcp3008@0 {
226 + compatible = "mcp3008";
228 + spi-max-frequency = <1600000>;
237 + #address-cells = <1>;
240 + mcp3008_21: mcp3008@1 {
241 + compatible = "mcp3008";
243 + spi-max-frequency = <1600000>;
252 + #address-cells = <1>;
255 + mcp3008_22: mcp3008@2 {
256 + compatible = "mcp3008";
258 + spi-max-frequency = <1600000>;
264 + spi0-0-present = <0>, "+0+8";
265 + spi0-1-present = <0>, "+1+9";
266 + spi1-0-present = <0>, "+2+10";
267 + spi1-1-present = <0>, "+3+11";
268 + spi1-2-present = <0>, "+4+12";
269 + spi2-0-present = <0>, "+5+13";
270 + spi2-1-present = <0>, "+6+14";
271 + spi2-2-present = <0>, "+7+15";
272 + spi0-0-speed = <&mcp3008_00>, "spi-max-frequency:0";
273 + spi0-1-speed = <&mcp3008_01>, "spi-max-frequency:0";
274 + spi1-0-speed = <&mcp3008_10>, "spi-max-frequency:0";
275 + spi1-1-speed = <&mcp3008_11>, "spi-max-frequency:0";
276 + spi1-2-speed = <&mcp3008_12>, "spi-max-frequency:0";
277 + spi2-0-speed = <&mcp3008_20>, "spi-max-frequency:0";
278 + spi2-1-speed = <&mcp3008_21>, "spi-max-frequency:0";
279 + spi2-2-speed = <&mcp3008_22>, "spi-max-frequency:0";