linux-kernel - Re: [1/3] rtc/fsl: support flextimer for lx2160a

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Message-ID: <1566579388.5029.8.camel@impinj.com>
Date:   Fri, 23 Aug 2019 16:56:28 +0000
From:   Trent Piepho <tpiepho@...inj.com>
To:     "leoyang.li@....com" <leoyang.li@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "a.zummo@...ertech.it" <a.zummo@...ertech.it>,
        "biwen.li@....com" <biwen.li@....com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>
CC:     "linux-rtc@...r.kernel.org" <linux-rtc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [1/3] rtc/fsl: support flextimer for lx2160a

On Fri, 2019-08-23 at 17:57 +0800, Biwen Li wrote:
> The patch supports flextimer for lx2160a
> 
> Signed-off-by: Biwen Li <biwen.li@....com>
> ---
>  drivers/rtc/rtc-fsl-ftm-alarm.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/rtc/rtc-fsl-ftm-alarm.c b/drivers/rtc/rtc-fsl-
> ftm-alarm.c
> index 4f7259c2d6a3..2b81525f6db8 100644
> --- a/drivers/rtc/rtc-fsl-ftm-alarm.c
> +++ b/drivers/rtc/rtc-fsl-ftm-alarm.c
> @@ -313,6 +313,7 @@ static const struct of_device_id ftm_rtc_match[]
> = {
>  	{ .compatible = "fsl,ls1088a-ftm-alarm", },
>  	{ .compatible = "fsl,ls208xa-ftm-alarm", },
>  	{ .compatible = "fsl,ls1028a-ftm-alarm", },
> +	{ .compatible = "fsl,lx2160a-ftm-alarm", },
>  	{ },
>  };
>  

Since there's no data associated with each compatible, it doesn't seem
like there's any need to add a new one.

What's normally done is add two compatibles in the dts, the base
version and the specific version, e.g.:

+		rcpm: rcpm@...4040 {
+			compatible = "fsl,lx2160a-rcpm", "fsl,qoriq-cpm-2.1+";

Or in this case, compatible = "fsl,lx2160a-ftm-alarm", "fsl,ls1088a-ftm-alarm";

Then there's no need to add to the driver list.