netdev - RE: [PATCH 1/7] dt-bindings: can: flexcan: fix imx8mp compatbile

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Date:   Thu, 15 Jul 2021 11:00:07 +0000
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     Dong Aisheng <dongas86@...il.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
CC:     Aisheng Dong <aisheng.dong@....com>,
        devicetree <devicetree@...r.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@...ts.infradead.org>,
        dl-linux-imx <linux-imx@....com>,
        Sascha Hauer <kernel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH 1/7] dt-bindings: can: flexcan: fix imx8mp compatbile


Hi Aisheng, Marc,

> -----Original Message-----
> From: Dong Aisheng <dongas86@...il.com>
> Sent: 2021年7月15日 18:46
> To: Marc Kleine-Budde <mkl@...gutronix.de>
> Cc: Aisheng Dong <aisheng.dong@....com>; devicetree
> <devicetree@...r.kernel.org>; moderated list:ARM/FREESCALE IMX / MXC
> ARM ARCHITECTURE <linux-arm-kernel@...ts.infradead.org>; dl-linux-imx
> <linux-imx@....com>; Sascha Hauer <kernel@...gutronix.de>; Rob Herring
> <robh+dt@...nel.org>; Shawn Guo <shawnguo@...nel.org>; Joakim Zhang
> <qiangqing.zhang@....com>; linux-can@...r.kernel.org;
> netdev@...r.kernel.org
> Subject: Re: [PATCH 1/7] dt-bindings: can: flexcan: fix imx8mp compatbile
> 
> Hi Marc,
> 
> On Thu, Jul 15, 2021 at 5:12 PM Marc Kleine-Budde <mkl@...gutronix.de>
> wrote:
> >
> > On 15.07.2021 16:25:30, Dong Aisheng wrote:
> > > This patch fixes the following errors during make dtbs_check:
> > > arch/arm64/boot/dts/freescale/imx8mp-evk.dt.yaml: can@...c0000:
> compatible: 'oneOf' conditional failed, one must be fixed:
> > >       ['fsl,imx8mp-flexcan', 'fsl,imx6q-flexcan'] is too long
> >
> > IIRC the fsl,imx6q-flexcan binding doesn't work on the imx8mp. Maybe
> > better change the dtsi?
> 
> I checked with Joakim that the flexcan on MX8MP is derived from MX6Q with
> extra ECC added. Maybe we should still keep it from HW point of view?

Sorry, Aisheng, I double check the history, and get the below results:

8MP reuses 8QXP(8QM), except ECC_EN (ipv_flexcan3_syn_006/D_IP_FlexCAN3_SYN_057 which corresponds to version d_ip_flexcan3_syn.03.00.17.01)

I prefer to change the dtsi as Mac suggested if possible, shall I send a fix patch?
 
Best Regards,
Joakim Zhang
> Regards
> Aisheng
> 
> >
> > regards,
> > Marc
> >
> > --
> > Pengutronix e.K.                 | Marc Kleine-Budde           |
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