Added device tree binding documentation for Nuvoton BMC
NPCM Peripheral SPI controller.
Signed-off-by: Tomer Maimon <tmaimo...@gmail.com>
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.../devicetree/bindings/spi/nuvoton,npcm-pspi.txt | 35 ++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
diff --git a/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
b/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
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index 000000000000..99606b22e5c2
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+Nuvoton NPCM Peripheral Serial Peripheral Interface(PSPI) controller driver
+
+Nuvoton NPCM7xx SOC support two PSPI channels.
+
+Required properties:
+ - compatible : "nuvoton,npcm750-pspi" for NPCM7XX BMC
+ - #address-cells : should be 1. see spi-bus.txt
+ - #size-cells : should be 0. see spi-bus.txt
+ - specifies physical base address and size of the register.
+ - interrupts : contain PSPI interrupt.
+ - clocks : phandle of PSPI reference clock.
+ - clock-names: Should be "clk_apb5".
+ - pinctrl-names : a pinctrl state named "default" must be defined.
+ - pinctrl-0 : phandle referencing pin configuration of the device.
+ - cs-gpios: Specifies the gpio pins to be used for chipselects.
+ See: Documentation/devicetree/bindings/spi/spi-bus.txt
+
+Optional properties:
+- clock-frequency : Input clock frequency to the PSPI block in Hz.
+ Default is 25000000 Hz.
+
+Example:
+
+spi0: spi@f0200000 {
+ compatible = "nuvoton,npcm750-pspi";
+ reg = <0xf0200000 0x1000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pspi1_pins>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clk NPCM7XX_CLK_APB5>;
+ clock-names = "clk_apb5";
+ cs-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>;
+};
--
2.14.1
