On Mon, 2018-02-12 at 17:38 +1030, Joel Stanley wrote:
> The LPC Host Interface Controller is part of a BMC SoC that is used for
> communication with the host.
>
> Signed-off-by: Joel Stanley <j...@jms.id.au>
> ---
> .../devicetree/bindings/mfd/aspeed-lpc.txt | 40
> ++++++++++++++++++++++
> 1 file changed, 40 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
> b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
> index 514d82ced95b..94a31de109c4 100644
> --- a/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
> +++ b/Documentation/devicetree/bindings/mfd/aspeed-lpc.txt
> @@ -109,6 +109,46 @@ lpc: lpc@1e789000 {
> };
> };
>
> +BMC Node Children
> +==================
> +
> +LPC Host Interface Controller
This should be under the Host Node Children header given the
function's position in the MMIO layout and the split prescribed by the
bindings.
> +-------------------
> +
> +The LPC Host Interface Controller manages functions exposed to the host such
> as
> +LPC firmware hub cycles, configuration of the LPC-to-AHB mapping, UART
> +management and bus snoop configuration.
> +
> +Required properties:
> +
> +- compatible: One of:
> + "aspeed,ast2400-lpc-ctrl";
> + "aspeed,ast2500-lpc-ctrl";
> +
> +- reg: contains offset/length values of the host interface
> controller
> + memory regions
> +
> +- clocks: contains a phandle to the syscon node describing the clocks.
> + There should then be one cell representing the clock to use
> +
> +- memory-region: A phandle to a reserved_memory region to be used for the LPC
> + to AHB mapping
> +
> +- flash: A phandle to the SPI flash controller containing the flash to
> + be exposed over the LPC to AHB mapping
> +
> +Example:
> +
> +lpc-host@80 {
> + lpc_ctrl: lpc-ctrl@0 {
> + compatible = "aspeed,ast2500-lpc-ctrl";
> + reg = <0x0 0x80>;
> + clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
> + memory-region = <&flash_memory>;
> + flash = <&spi>;
> + };
> +};
ACK wrt the content, just need to fix its location.
> +
> Host Node Children
> ==================
>
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