Difference between revisions of "BeagleBone Black Enable SPIDEV"
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Start nano | Start nano | ||
<pre> | <pre> | ||
− | nano BB- | + | nano BB-SPI0-01-00A0.dts |
</pre> | </pre> | ||
<br> | <br> | ||
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/* identification */ | /* identification */ | ||
− | part-number = " | + | part-number = "spi0pinmux"; |
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fragment@0 { | fragment@0 { | ||
target = <&am33xx_pinmux>; | target = <&am33xx_pinmux>; | ||
__overlay__ { | __overlay__ { | ||
− | + | spi0_pins_s0: spi0_pins_s0 { | |
− | pinctrl-single,pins = < | + | pinctrl-single,pins = < |
− | + | 0x150 0x30 /* spi0_sclk, INPUT_PULLUP | MODE0 */ | |
− | + | 0x154 0x30 /* spi0_d0, INPUT_PULLUP | MODE0 */ | |
− | + | 0x158 0x10 /* spi0_d1, OUTPUT_PULLUP | MODE0 */ | |
− | + | 0x15c 0x10 /* spi0_cs0, OUTPUT_PULLUP | MODE0 */ | |
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>; | >; | ||
}; | }; | ||
Line 152: | Line 137: | ||
fragment@1 { | fragment@1 { | ||
− | target = <& | + | target = <&spi0>; |
__overlay__ { | __overlay__ { | ||
− | + | #address-cells = <1>; | |
− | + | #size-cells = <0>; | |
− | + | ||
− | + | status = "okay"; | |
− | + | pinctrl-names = "default"; | |
− | + | pinctrl-0 = <&spi0_pins_s0>; | |
− | + | spidev@0 { | |
− | + | spi-max-frequency = <24000000>; | |
− | + | reg = <0>; | |
− | + | compatible = "linux,spidev"; | |
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}; | }; | ||
}; | }; | ||
Line 183: | Line 157: | ||
Close the file (Ctrl-o, Ctrl-x) and compile using dtc: | Close the file (Ctrl-o, Ctrl-x) and compile using dtc: | ||
<pre> | <pre> | ||
− | dtc -O dtb -o BB- | + | dtc -O dtb -o BB-SPI0-01-00A0.dtbo -b 0 -@ BB-SPI0-01-00A0.dts |
</pre> | </pre> | ||
Then, copy the file into /lib/firmware/: | Then, copy the file into /lib/firmware/: | ||
<pre> | <pre> | ||
− | cp BB- | + | cp BB-SPI0-01-00A0.dtbo /lib/firmware/ |
</pre> | </pre> | ||
Then enable the device tree overlay: | Then enable the device tree overlay: | ||
<pre> | <pre> | ||
− | echo BB- | + | echo BB-SPI0-01 > /sys/devices/bone_capemgr.*/slots |
</pre> | </pre> | ||
Line 197: | Line 171: | ||
You should now have two spidev-files in the folder /dev/ | You should now have two spidev-files in the folder /dev/ | ||
<pre> | <pre> | ||
− | ls -al /dev/ | + | ls -al /dev/spidev0.* |
</pre> | </pre> | ||
You should also be able to see the pingroups: | You should also be able to see the pingroups: |
Revision as of 19:41, 15 July 2013
For SPI1
Start nano
nano BB-SPI1-01-00A0.dts
Copy-paste this into the file:
/dts-v1/; /plugin/; / { compatible = "ti,beaglebone", "ti,beaglebone-black"; /* identification */ part-number = "BB-SPI1-01"; /* version */ version = "00A0"; /* state the resources this cape uses */ exclusive-use = /* the pin header uses */ "P9.31", "P9.29", "P9.30", "P9.28", "P9.13", "P9.12", "spi1"; fragment@0 { target = <&am33xx_pinmux>; __overlay__ { pinctrl_spi1: pinctrl_spi1_pins { pinctrl-single,pins = < 0x190 0x13 /* P9_31 = mcasp0_aclkx.spi1_sclk , OUTPUT_PULLUP | MODE3 */ 0x194 0x33 /* P9_29 = mcasp0_fsx.spi1_d0 , INPUT_PULLUP | MODE3 */ 0x198 0x13 /* P9_30 = mcasp0_axr0.spi1_d1 , OUTPUT_PULLUP | MODE3 */ 0x19c 0x13 /* P9_28 = mcasp0_ahclkr.spi1_cs0 , OUTPUT_PULLUP | MODE3 */ 0x164 0x12 /* P9_42 = GPIO0_7 = eCAP0_in_PWM0_out.gpio0[7] , OUTPUT_PULLUP | MODE2 */ >; }; }; }; fragment@1 { target = <&spi1>; __overlay__ { #address-cells = <1>; #size-cells = <0>; status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&pinctrl_spi1>; cs-gpios = <&gpio4 17 0>, <&gpio1 7 0>; spi1_0{ #address-cells = <1>; #size-cells = <0>; compatible = "spidev"; reg = <0>; spi-max-frequency = <16000000>; spi-cpha; }; spi1_1{ #address-cells = <1>; #size-cells = <0>; compatible = "spidev"; reg = <1>; spi-max-frequency = <16000000>; // Mode 0 (CPOL = 0, CPHA = 0) }; }; }; };
Close the file (Ctrl-o, Ctrl-x) and compile using dtc:
dtc -O dtb -o BB-SPI1-01-00A0.dtbo -b 0 -@ BB-SPI1-01-00A0.dts
Then, copy the file into /lib/firmware/:
cp BB-SPI1-01-00A0.dtbo /lib/firmware/
Then enable the device tree overlay:
echo BB-SPI1-01 > /sys/devices/bone_capemgr.*/slots
Make sure it is enabled You should now have two spidev-files in the folder /dev/
ls -al /dev/spidev1.*
You should also be able to see the pingroups:
cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups
SPI0
Start nano
nano BB-SPI0-01-00A0.dts
Copy-paste this into the file:
/dts-v1/; /plugin/; / { compatible = "ti,beaglebone", "ti,beaglebone-black"; /* identification */ part-number = "spi0pinmux"; fragment@0 { target = <&am33xx_pinmux>; __overlay__ { spi0_pins_s0: spi0_pins_s0 { pinctrl-single,pins = < 0x150 0x30 /* spi0_sclk, INPUT_PULLUP | MODE0 */ 0x154 0x30 /* spi0_d0, INPUT_PULLUP | MODE0 */ 0x158 0x10 /* spi0_d1, OUTPUT_PULLUP | MODE0 */ 0x15c 0x10 /* spi0_cs0, OUTPUT_PULLUP | MODE0 */ >; }; }; }; fragment@1 { target = <&spi0>; __overlay__ { #address-cells = <1>; #size-cells = <0>; status = "okay"; pinctrl-names = "default"; pinctrl-0 = <&spi0_pins_s0>; spidev@0 { spi-max-frequency = <24000000>; reg = <0>; compatible = "linux,spidev"; }; }; }; };
Close the file (Ctrl-o, Ctrl-x) and compile using dtc:
dtc -O dtb -o BB-SPI0-01-00A0.dtbo -b 0 -@ BB-SPI0-01-00A0.dts
Then, copy the file into /lib/firmware/:
cp BB-SPI0-01-00A0.dtbo /lib/firmware/
Then enable the device tree overlay:
echo BB-SPI0-01 > /sys/devices/bone_capemgr.*/slots
Make sure it is enabled You should now have two spidev-files in the folder /dev/
ls -al /dev/spidev0.*
You should also be able to see the pingroups:
cat /sys/kernel/debug/pinctrl/44e10800.pinmux/pingroups