On Thu, Aug 08, 2019 at 04:14:47PM +0300, Tomer Maimon wrote:
> Added device tree binding documentation for Nuvoton BMC
> NPCM Flash Interface Unit(FIU) SPI master controller
> using SPI-MEM interface.
>
> Signed-off-by: Tomer Maimon
> ---
> .../bindings/spi/nuvoton,npcm-fiu.txt | 47 +++
> 1 file changed, 47 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt
>
> diff --git a/Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt
> b/Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt
> new file mode 100644
> index ..ab37aae91d19
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/spi/nuvoton,npcm-fiu.txt
> @@ -0,0 +1,47 @@
> +* Nuvoton FLASH Interface Unit (FIU) SPI Controller
> +
> +NPCM FIU supports single, dual and quad communication interface.
> +
> +The NPCM7XX supports three FIU modules,
> +FIU0 and FIUx supports two chip selects,
> +FIU3 support four chip select.
> +
> +Required properties:
> + - compatible : "nuvoton,npcm750-fiu" for the NPCM7XX BMC
> + - #address-cells : should be 1.
> + - #size-cells : should be 0.
> + - reg : the first contains the register location and length,
> + the second contains the memory mapping address and length
> + - reg-names: Should contain the reg names "control" and "memory"
> + - clocks : phandle of FIU reference clock.
> +
> +Required properties in case the pins can be muxed:
> + - pinctrl-names : a pinctrl state named "default" must be defined.
> + - pinctrl-0 : phandle referencing pin configuration of the device.
> +
> +Optional property:
> + - spix-mode: enable spix-mode for an expansion bus to an ASIC or CPLD.
Is this something standard? If not, add a vendor prefix.
> +
> +Aliases:
> +- All the FIU controller nodes should be represented in the aliases node
> using
> + the following format 'fiu{n}' where n is a unique number for the alias.
> + In the NPCM7XX BMC:
> + fiu0 represent fiu 0 controller
> + fiu1 represent fiu 3 controller
> + fiu2 represent fiu x controller
> +
> +Example:
> +fiu3: fiu@c {
spi@...
> + compatible = "nuvoton,npcm750-fiu";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + reg = <0xfb00 0x1000>, <0x8000 0x1000>;
> + reg-names = "control", "memory";
> + clocks = < NPCM7XX_CLK_AHB>;
> + pinctrl-names = "default";
> + pinctrl-0 = <_pins>;
> + spi-nor@0 {
> + ...
> + };
> +};
> +
> --
> 2.18.0
>
