On 12/26/2016 11:06 PM, Roger Shimizu wrote:
> Add linkstation-reset doc to describe the newly added
> POWER_RESET_LINKSTATION driver, which controls magic command
> sending to UART1 to power-off Buffalo Linkstation / KuroBox
> and their variants.
>
> To: Sebastian Reichel <sre@xxxxxxxxxx>
> To: Rob Herring <robh+dt@xxxxxxxxxx>
> To: Mark Rutland <mark.rutland@xxxxxxx>
> Cc: Andrew Lunn <andrew@xxxxxxx>
> Cc: Ryan Tandy <ryan@xxxxxxxxx>
> Cc: linux-pm@xxxxxxxxxxxxxxx
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
>
> Signed-off-by: Roger Shimizu <rogershimizu@xxxxxxxxx>
> ---
> .../bindings/power/reset/linkstation-reset.txt | 26 ++++++++++++++++++++++
> 1 file changed, 26 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/power/reset/linkstation-reset.txt
>
> diff --git a/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt b/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt
> new file mode 100644
> index 000000000000..815e340318f3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/power/reset/linkstation-reset.txt
> @@ -0,0 +1,26 @@
> +* Buffalo Linkstation Reset Driver
> +
> +Power of some Buffalo Linkstation or KuroBox Pro is managed by
> +micro-controller, which connects to UART1. After being fed from UART1
> +by a few magic numbers, the so-called power-off command,
> +the micro-controller will turn power off the device.
> +
> +This is very similar to QNAP or Synology NAS devices, which is
> +described in qnap-poweroff.txt, however the command is much simpler,
> +only 1-byte long and without checksums.
> +
> +This driver adds a handler to pm_power_off which is called to turn the
> +power off.
This is a driver implementation detail, so does not really belong in the
DT here.
> +
> +Required Properties:
> +- compatible: Should be "linkstation,power-off"
> +- reg: Address and length of the register set for UART1
Humm, should we instead have a phandle to the uart1 node?
> +- clocks: tclk clock
> +
> +Example:
> +
> + reset {
> + compatible = "linkstation,power-off";
> + reg = <0x12100 0x100>;
> + clocks = <&core_clk 0>;
> + };
>
--
Florian
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