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* Energy Micro EFM32 SPI
Required properties:
- #address-cells: see spi-bus.txt
- #size-cells: see spi-bus.txt
- compatible: should be "energymicro,efm32-spi"
- reg: Offset and length of the register set for the controller
- interrupts: pair specifying rx and tx irq
- clocks: phandle to the spi clock
- cs-gpios: see spi-bus.txt
Recommended properties :
- energymicro,location: Value to write to the ROUTE register's LOCATION
bitfield to configure the pinmux for the device, see
datasheet for values.
If this property is not provided, keeping what is
already configured in the hardware, so its either the
reset default 0 or whatever the bootloader did.
Example:
spi1: spi@0x4000c400 { /* USART1 */
#address-cells = <1>;
#size-cells = <0>;
compatible = "energymicro,efm32-spi";
reg = <0x4000c400 0x400>;
interrupts = <15 16>;
clocks = <&cmu 20>;
cs-gpios = <&gpio 51 1>; // D3
energymicro,location = <1>;
ks8851@0 {
compatible = "ks8851";
spi-max-frequency = <6000000>;
reg = <0>;
interrupt-parent = <&boardfpga>;
interrupts = <4>;
};
};
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