linux-kernel - Re: [PATCH v4 5/5] ARM: dts: imx6qdl: add missing compatible and clock properties for EPIT

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Message-ID: <f71fe02d-23a7-a475-52df-62c17089549b@mentor.com>
Date:   Thu, 31 May 2018 11:54:04 +0300
From:   Vladimir Zapolskiy <vladimir_zapolskiy@...tor.com>
To:     Clément Péron <peron.clem@...il.com>
CC:     Colin Didier <colin.didier@...ialet.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Fabio Estevam <fabio.estevam@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Rob Herring <robh@...nel.org>,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Clément Peron <clement.peron@...ialet.com>
Subject: Re: [PATCH v4 5/5] ARM: dts: imx6qdl: add missing compatible and
 clock properties for EPIT

Hi Clément,

On 05/31/2018 11:41 AM, Clément Péron wrote:
> Hi Vladimir,
> 
> On Thu, 31 May 2018 at 10:33, Vladimir Zapolskiy
> <vladimir_zapolskiy@...tor.com> wrote:
>>
>> On 05/30/2018 03:03 PM, Clément Péron wrote:
>>> From: Colin Didier <colin.didier@...ialet.com>
>>>
>>> Add missing compatible and clock properties for EPIT node.
>>>
>>> Signed-off-by: Colin Didier <colin.didier@...ialet.com>
>>> Signed-off-by: Clément Peron <clement.peron@...ialet.com>
>>> Reviewed-by: Fabio Estevam <fabio.estevam@....com>
>>> ---
>>>  arch/arm/boot/dts/imx6qdl.dtsi | 10 ++++++++++
>>>  1 file changed, 10 insertions(+)
>>>
>>> diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
>>> index c003e62bf290..0feec516847a 100644
>>> --- a/arch/arm/boot/dts/imx6qdl.dtsi
>>> +++ b/arch/arm/boot/dts/imx6qdl.dtsi
>>> @@ -844,13 +844,23 @@
>>>                       };
>>>
>>>                       epit1: epit@...0000 { /* EPIT1 */
>>
>> epit1: timer@...0000 { ...
>>
>> And /* EPIT1 */ comment can be removed, it is quite clear from the same
>> line context.
>>
>> Formally it is a subject to another patch, but I think this can be
>> accepted as a part of this one.
> 
> Should I also update other boards ?
> I only did it for imx6qdl.dtsi, but the EPIT is present in other boards
> but i can't test it myself.
> 

Sure, please do it, why not, it is quite a safe modification.

One change per one dtsi file will suffice, and I see that imx25.dtsi
already contains the requested change, however probably you may
want to update its compatible = "fsl,imx25-epit" line.

Regarding compatibles for other imx6* SoCs, I think all of them should
be documented in fsl,imxepit.txt and then added to the correspondent
dtsi files one per SoC.

And I forgot the outcome of one former discussion with Uwe Kleine-König,
but if my bad memory serves me, we agreed that i.MX25 was released later
than i.MX31, so the most generic (the last value in the list) compatible
should be a compatible with i.MX31 like in

	imx25.dtsi:367:	compatible = "fsl,imx25-gpt", "fsl,imx31-gpt";

--
With best wishes,
Vladimir