From: Purna Chandra Mandal <purna.mandal@xxxxxxxxxxxxx>
Document the devicetree bindings for the SPI peripheral found
on Microchip PIC32 class devices.
Signed-off-by: Purna Chandra Mandal <purna.mandal@xxxxxxxxxxxxx>
Signed-off-by: Joshua Henderson <joshua.henderson@xxxxxxxxxxxxx>
---
.../bindings/spi/microchip,spi-pic32.txt | 44 ++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
diff --git a/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt b/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
new file mode 100644
index 0000000..a555618
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/microchip,spi-pic32.txt
@@ -0,0 +1,44 @@
+* Microchip PIC32 SPI device
+
+Required properties:
+- compatible: Should be "microchip,pic32mzda-spi".
+- reg: Address and length of the register set for the device
+- interrupts: Should contain all three spi interrupts in sequence
+ of <fault-irq>, <receive-irq>, <transmit-irq>.
+- interrupt-names: Should be "fault","rx","tx" in order.
+- clocks: phandles of baud generation clocks. Maximum two possible clocks
+ can be provided (&PBCLK2, &REFCLKO1).
+ See: Documentation/devicetree/bindings/clock/clock-bindings.txt
+- clock-names: Should be "mck0","mck1".
+ See: Documentation/devicetree/bindings/resource-names.txt
+- pinctrl-names: A pinctrl state names "default" must be defined.
+- pinctrl-0: Phandle referencing pin configuration of the SPI peripheral.
+ See: Documentation/devicetree/bindings/pinctrl/pinctrl-binding.txt
+
+Optional properties:
+- cs-gpios: List of GPIO chip selects. See ../spi/spi-bus.txt
+ See: Documentation/devicetree/bindings/spi/spi-bus.txt
+- dmas: Two or more DMA channel specifiers following the convention outlined
+ in Documentation/devicetree/bindings/dma/dma.txt
+- dma-names: Names for the dma channels. There must be at least one channel
+ named "spi-tx" for transmit and named "spi-rx" for receive.
+
+Example:
+
+ spi1:spi@0x1f821000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "microchip,pic32mzda-spi";
+ reg = <0x1f821000 0x200>;
+ interrupts = <109 IRQ_TYPE_LEVEL_HIGH>,
+ <110 IRQ_TYPE_LEVEL_HIGH>,
+ <111 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "fault", "rx", "tx";
+ clocks = <&PBCLK2>, <&REFCLKO1>;
+ clock-names = "mck0", "mck1";
+ dmas = <&dma 134>,
+ <&dma 135>;
+ dma-names = "spi-rx", "spi-tx";
+ cs-gpios = <&gpio3 0 GPIO_ACTIVE_LOW>,
+ <&gpio3 14 GPIO_ACTIVE_LOW>;
+ };
--
1.7.9.5
