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Diffstat (limited to 'kernel/Documentation/devicetree/bindings/spi/efm32-spi.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/spi/efm32-spi.txt | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/spi/efm32-spi.txt b/kernel/Documentation/devicetree/bindings/spi/efm32-spi.txt new file mode 100644 index 000000000..750e29aff --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/spi/efm32-spi.txt @@ -0,0 +1,41 @@ +* 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>; + status = "ok"; + + ks8851@0 { + compatible = "ks8851"; + spi-max-frequency = <6000000>; + reg = <0>; + interrupt-parent = <&boardfpga>; + interrupts = <4>; + status = "ok"; + }; +}; |