On Thu, 11 Sep 2014, Boris BREZILLON wrote:
> The GPBR block provides a set of battery-backed registers that can be used
> to save data which need to be kept when the system is powered down and
> VDD-core is maintained by an external battery.
>
> A typical usage is the RTT block (when used as an RTC) which needs one of
> those registers to save the current time.
>
> Signed-off-by: Boris BREZILLON <boris.brezillon@xxxxxxxxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/mfd/atmel,gpbr.txt | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/atmel,gpbr.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt
> new file mode 100644
> index 0000000..a285695
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/atmel,gpbr.txt
> @@ -0,0 +1,15 @@
> +* Device tree bindings for Atmel GPBR (General Purpose Backup Registers)
> +
> +The GPBR are a set of battery-backed registers.
> +
> +Required properties:
> +- compatible: "atmel,at91sam9260-gpbr", "syscon"
> +- reg: contains offset/length value of the GPBR memory
> + region.
> +
> +Example:
> +
> +gpbr: gpbr@fffffd50 {
Is something referencing this node via phandle? If not, please remove
the label.
> + compatible = "atmel,at91sam9260-gpbr", "syscon";
> + reg = <0xfffffd50 0x10>;
> +};
--
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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