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Message-ID: <CADRPPNQ8nZQYq1ZXZ368LLeKnyrXpjB_X8XaHVhW890bw-tU6A@mail.gmail.com>
Date:   Wed, 10 Jul 2019 14:45:58 -0500
From:   Li Yang <leoyang.li@....com>
To:     Biwen Li <biwen.li@....com>, Rob Herring <robh+dt@...nel.org>
Cc:     a.zummo@...ertech.it, alexandre.belloni@...tlin.com,
        linux-rtc@...r.kernel.org, lkml <linux-kernel@...r.kernel.org>,
        Xiaobo Xie <xiaobo.xie@....com>,
        Jiafei Pan <jiafei.pan@....com>, Ran Wang <ran.wang_1@....com>
Subject: Re: [v2,2/2] Documentation: dt: binding: rtc: add binding for ftm
 alarm driver

On Wed, Jul 10, 2019 at 6:35 AM Biwen Li <biwen.li@....com> wrote:
>
> The patch adds binding for ftm alarm driver
>
> Signed-off-by: Biwen Li <biwen.li@....com>

Looks like I commented the older version just now.  Adding Rob to this
version too.

> ---
> Change in v2:
>     - replace ls1043a with ls1088a as example
>     - add rcpm node and fsl,rcpm-wakeup property
>
>  .../devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt  | 40 ++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt
>
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt b/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt
> new file mode 100644
> index 0000000..010984a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/rtc/rtc-fsl-ftm-alarm.txt
> @@ -0,0 +1,40 @@
> +Freescale FlexTimer Module (FTM) Alarm
> +
> +Note: The driver need work with RCPM driver to wake up system in sleep.
> +
> +Required properties:
> +
> +- compatible : Should be "fsl,ftm-alarm" or "fsl,<chip>-ftm-alarm", the
> +              supported chips include
> +              "fsl,ls1012a-ftm-alarm"
> +              "fsl,ls1021a-ftm-alarm"
> +              "fsl,ls1028a-ftm-alarm"
> +              "fsl,ls1043a-ftm-alarm"
> +              "fsl,ls1046a-ftm-alarm"
> +              "fsl,ls1088a-ftm-alarm"
> +              "fsl,ls208xa-ftm-alarm"
> +- reg : Specifies base physical address and size of the register sets for the
> +  FlexTimer Module and base physical address of IP Powerdown Exception Control
> +  Register.
> +- reg-names: names of the mapped memory regions listed in regs property.
> +  should include the following entries:
> +  "ftm":    Address of the register sets for FlexTimer Module
> +- interrupts : Should be the FlexTimer Module interrupt.
> +- fsl,rcpm-wakeup property and rcpm node : Please refer
> +       Documentation/devicetree/bindings/soc/fsl/rcpm.txt

Looks better.

> +- big-endian: If the host controller is big-endian mode, specify this property.
> +  The default endian mode is little-endian.

Same comment about optional property.

> +
> +Example:
> +rcpm: rcpm@...4050 {
> +       compatible = "fsl,ls1088a-rcpm", "fsl,qoriq-rcpm-2.1+";
> +       reg = <0x0 0x1e34050 0x0 0x4>;
> +       fsl,#rcpm-wakeup-cells = <1>;
> +}
> +
> +ftm_alarm0: timer@...0000 {
> +       compatible = "fsl,ftm-alarm";
> +       reg = <0x0 0x2800000 0x0 0x10000>;
> +       fsl,rcpm-wakeup = <&rcpm 0x0 0x4000>;
> +       interrupts = <0 44 4>;
> +}
> --
> 2.7.4
>

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