This patch adds device tree bindings for the mikroBUS port,
device tree overlays for the mikrobus Port on the BeagleBoard.org
PocketBeagle is available here :
github.com/beagleboard/bb.org-overlays/blob/master/src/arm/PB-MIKROBUS-0.dts
Signed-off-by: Vaishnav M A <vaishnav@xxxxxxxxxxxxxxx>
---
.../bindings/misc/linux,mikrobus.txt | 81 +++++++++++++++++++
1 file changed, 81 insertions(+)
create mode 100644 Documentation/devicetree/bindings/misc/linux,mikrobus.txt
diff --git a/Documentation/devicetree/bindings/misc/linux,mikrobus.txt b/Documentation/devicetree/bindings/misc/linux,mikrobus.txt
new file mode 100644
index 000000000000..99f75caf5f35
--- /dev/null
+++ b/Documentation/devicetree/bindings/misc/linux,mikrobus.txt
@@ -0,0 +1,81 @@
+mikroBUS add-on board socket
+
+Required properties:
+- compatible: Must be "linux,mikrobus"
+- i2c-adapter: phandle to the i2c adapter attached to the mikrobus socket.
+- spi-master: spi bus number of the spi-master attached to the mikrobus socket.
+- spi-cs: spi chip-select numbers corresponding to the chip-selects
+ on the mikrobus socket(0 -> chip select corresponding to CS pin
+ 1 -> chip select corresponding to RST pin).
+- serdev-controller: phandle to the uart port attached to the mikrobus socket.
+- pwms: phandle to the pwm-controller corresponding to the mikroBUS PWM pin.
+- mikrobus-gpios: gpios array corresponding to GPIOs on the mikroBUS port,
+ for targets not supporting the AN pin on the mikroBUS port as
+ GPIO, the length of the gpios array can be 11, otherwise it
+ should be 12.
+- pinctrl-names: pinctrl state names to support additional pin usage/deviations
+ from mikroBUS socket standard usage, must be "default",
+ "pwm_default", "pwm_gpio", "uart_default", "uart_gpio",
+ "i2c_default", "i2c_gpio", "spi_default", "spi_gpio", these
+ pinctrl names should have corresponding pinctrl-N entries which
+ corresponds to the pinmux state for the pingroup, for example,
+ i2c_default corresponds to the state where the I2C pin group
+ (SCL,SDA) are configured in I2C mode and i2c_gpio mode corresponds
+ to the pinmux state where these pins are configured as GPIO.
+- pinctrl-N : pinctrl-(0-8) corresponds to the pinctrl states for the states described
+ above.
+
+Example:
+ mikrobus-0 {
+ compatible = "linux,mikrobus";
+ status = "okay";
+ pinctrl-names = "default", "pwm_default", "pwm_gpio",
+ "uart_default", "uart_gpio", "i2c_default",
+ "i2c_gpio", "spi_default", "spi_gpio";
+ pinctrl-0 = <
+ &P2_03_gpio_input_pin
+ &P1_04_gpio_pin
+ &P1_02_gpio_pin
+ >;
+ pinctrl-1 = <&P2_01_pwm_pin>;
+ pinctrl-2 = <&P2_01_gpio_pin>;
+ pinctrl-3 = <
+ &P2_05_uart_pin
+ &P2_07_uart_pin
+ >;
+ pinctrl-4 = <
+ &P2_05_gpio_pin
+ &P2_07_gpio_pin
+ >;
+ pinctrl-5 = <
+ &P2_09_i2c_pin
+ &P2_11_i2c_pin
+ >;
+ pinctrl-6 = <
+ &P2_09_gpio_pin
+ &P2_11_gpio_pin
+ >;
+ pinctrl-7 = <
+ &P1_12_spi_pin
+ &P1_10_spi_pin
+ &P1_08_spi_sclk_pin
+ &P1_06_spi_cs_pin
+ >;
+ pinctrl-8 = <
+ &P1_12_gpio_pin
+ &P1_10_gpio_pin
+ &P1_08_gpio_pin
+ &P1_06_gpio_pin
+ >;
+ i2c-adapter = <&i2c1>;
+ spi-master = <0>;
+ spi-cs = <0 1>;
+ serdev-controller = <&uart4>;
+ pwms = <&ehrpwm1 0 500000 0>;
+ mikrobus-gpios = <&gpio1 18 0> , <&gpio0 23 0>,
+ <&gpio0 30 0> , <&gpio0 31 0>,
+ <&gpio0 15 0> , <&gpio0 14 0>,
+ <&gpio0 4 0> , <&gpio0 3 0>,
+ <&gpio0 2 0> , <&gpio0 5 0>,
+ <&gpio2 25 0> , <&gpio2 3 0>;
+ };
\ No newline at end of file
--
2.25.1
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