Hi,
On 23/03/2018 at 17:14:59 +0800, sean.wang@xxxxxxxxxxxx wrote:
> From: Sean Wang <sean.wang@xxxxxxxxxxxx>
>
> Add device-tree binding for MediaTek PMIC based RTC.
>
> Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
> ---
> .../devicetree/bindings/rtc/rtc-mt6397.txt | 39 ++++++++++++++++++++++
> 1 file changed, 39 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/rtc/rtc-mt6397.txt
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-mt6397.txt b/Documentation/devicetree/bindings/rtc/rtc-mt6397.txt
> new file mode 100644
> index 0000000..83ff6be
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/rtc-mt6397.txt
> @@ -0,0 +1,39 @@
> +Device-Tree bindings for MediaTek PMIC based RTC
> +
> +MediaTek PMIC based RTC is an independent function of MediaTek PMIC which
> +is working as a multi-function device (MFD). And the RTC can be configured and
> +set up via PMIC wrapper bus. Which is also common resource shared among the
> +other functions present on the PMIC.
> +
> +For MediaTek PMIC wrapper bus bindings, see:
> +Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
> +
> +Required parent node:
> +- pmic
> + For MediaTek PMIC MFD bindings, see:
> + Documentation/devicetree/bindings/mfd/mt6397.txt
> +
> +Required properties:
> +- compatible: Should be one of follows
> + "mediatek,mt6323-rtc": for MT6323 PMIC
> + "mediatek,mt6397-rtc": for MT6397 PMIC
> +
> +Optional child node:
> +- power-off
> + For Power-Off Device for MediaTek PMIC RTC bindings, see:
> + Documentation/devicetree/bindings/power/reset/mt6397-rtc-poweroff.txt
> +
> +Example:
> +
> + pmic {
> + compatible = "mediatek,mt6323";
> +
> + ...
> + rtc {
> + compatible = "mediatek,mt6323-rtc";
> +
> + power-off {
> + compatible = "mediatek,mt6323-rtc-poweroff";
> + };
I'm pretty sure the whole point of mfd is to avoid having the poweroff
controller under the rtc
--
Alexandre Belloni, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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