netdev - RE: [PATCH 6/6] can: flexcan: fix ECC function on LS1021A/LX2160A

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Date:   Fri, 16 Oct 2020 06:49:42 +0000
From:   Joakim Zhang <qiangqing.zhang@....com>
To:     Marc Kleine-Budde <mkl@...gutronix.de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>
CC:     "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>, Ying Liu <victor.liu@....com>,
        Peng Fan <peng.fan@....com>,
        "linux-can@...r.kernel.org" <linux-can@...r.kernel.org>,
        Pankaj Bansal <pankaj.bansal@....com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 6/6] can: flexcan: fix ECC function on LS1021A/LX2160A

Hi Marc,

> -----Original Message-----
> From: Marc Kleine-Budde <mkl@...gutronix.de>
> Sent: 2020年10月16日 14:05
> To: Joakim Zhang <qiangqing.zhang@....com>; robh+dt@...nel.org;
> shawnguo@...nel.org; s.hauer@...gutronix.de
> Cc: kernel@...gutronix.de; dl-linux-imx <linux-imx@....com>; Ying Liu
> <victor.liu@....com>; Peng Fan <peng.fan@....com>;
> linux-can@...r.kernel.org; Pankaj Bansal <pankaj.bansal@....com>;
> netdev@...r.kernel.org; devicetree@...r.kernel.org;
> linux-kernel@...r.kernel.org
> Subject: Re: [PATCH 6/6] can: flexcan: fix ECC function on LS1021A/LX2160A
> 
> On 10/16/20 3:43 PM, Joakim Zhang wrote:
> > After double check with Layerscape CAN owner (Pankaj Bansal), confirm
> > that LS1021A doesn't support ECC, and LX2160A indeed supports ECC.
> >
> > For SoCs with ECC supported, even use FLEXCAN_QUIRK_DISABLE_MECR
> quirk
> > to disable non-correctable errors interrupt and freeze mode, had
> > better use FLEXCAN_QUIRK_SUPPORT_ECC quirk to initialize all memory.
> >
> > Signed-off-by: Joakim Zhang <qiangqing.zhang@....com>
> > ---
> >  drivers/net/can/flexcan.c | 10 +++++-----
> >  1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
> > index a55ea8f27f7c..7b0eb608fc9d 100644
> > --- a/drivers/net/can/flexcan.c
> > +++ b/drivers/net/can/flexcan.c
> > @@ -219,7 +219,7 @@
> >   *   MX8MP FlexCAN3  03.00.17.01    yes       yes        no
> yes       yes          yes
> >   *   VF610 FlexCAN3  ?               no       yes        no
> yes       yes?          no
> >   * LS1021A FlexCAN2  03.00.04.00     no       yes        no
> no       yes           no
> > - * LX2160A FlexCAN3  03.00.23.00     no       yes        no
> no       yes          yes
> > + * LX2160A FlexCAN3  03.00.23.00     no       yes        no
> yes       yes          yes
> >   *
> >   * Some SOCs do not have the RX_WARN & TX_WARN interrupt line
> connected.
> >   */
> > @@ -408,19 +408,19 @@ static struct flexcan_devtype_data
> > fsl_imx8mp_devtype_data = {  static const struct flexcan_devtype_data
> fsl_vf610_devtype_data = {
> >  	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG |
> FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
> >  		FLEXCAN_QUIRK_DISABLE_MECR |
> FLEXCAN_QUIRK_USE_OFF_TIMESTAMP |
> > -		FLEXCAN_QUIRK_BROKEN_PERR_STATE,
> > +		FLEXCAN_QUIRK_BROKEN_PERR_STATE |
> FLEXCAN_QUIRK_SUPPORT_ECC,
> 
> You add the missing ECC init for vf610, but don't mention it in the patch subject
> nor description. Please make this a seperate patch and add a Fixes: line.
OK.

> >  };
> >
> >  static const struct flexcan_devtype_data fsl_ls1021a_r2_devtype_data = {
> >  	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG |
> FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
> > -		FLEXCAN_QUIRK_DISABLE_MECR |
> FLEXCAN_QUIRK_BROKEN_PERR_STATE |
> > -		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP,
> > +		FLEXCAN_QUIRK_BROKEN_PERR_STATE |
> FLEXCAN_QUIRK_USE_OFF_TIMESTAMP,
> >  };
> 
> Please make this a seperate patch, too, along with the Fixes line.
OK.

Best Regards,
Joakim Zhang
> >  static const struct flexcan_devtype_data fsl_lx2160a_r1_devtype_data = {
> >  	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG |
> FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
> >  		FLEXCAN_QUIRK_DISABLE_MECR |
> FLEXCAN_QUIRK_BROKEN_PERR_STATE |
> > -		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP |
> FLEXCAN_QUIRK_SUPPORT_FD,
> > +		FLEXCAN_QUIRK_USE_OFF_TIMESTAMP |
> FLEXCAN_QUIRK_SUPPORT_FD |
> > +		FLEXCAN_QUIRK_SUPPORT_ECC,
> >  };
> >
> >  static const struct can_bittiming_const flexcan_bittiming_const = {
> >
> 
> 
> --
> Pengutronix e.K.                 | Marc Kleine-Budde           |
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