Nuvoton NPCM Peripheral Serial Peripheral Interface(PSPI) controller driver Nuvoton NPCM7xx SOC support two PSPI channels. Required properties: - compatible : "nuvoton,npcm750-pspi" for Poleg NPCM7XX. "nuvoton,npcm845-pspi" for Arbel NPCM8XX. - #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. - resets : phandle to the reset control for this 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. spi0: spi@f0200000 { compatible = "nuvoton,npcm750-pspi"; reg = <0xf0200000 0x1000>; pinctrl-names = "default"; pinctrl-0 = <&pspi1_pins>; #address-cells = <1>; #size-cells = <0>; interrupts = ; clocks = <&clk NPCM7XX_CLK_APB5>; clock-names = "clk_apb5"; resets = <&rstc NPCM7XX_RESET_IPSRST2 NPCM7XX_RESET_PSPI1> cs-gpios = <&gpio6 11 GPIO_ACTIVE_LOW>; };