[U-Boot] [PATCH v6 34/34] imx: add i.MX8QXP MEK board support

[Tim Harvey]

On Thu, Oct 25, 2018 at 5:46 PM Peng Fan <peng.fan at nxp.com> wrote:
>
> Hi Tim,
>
> > -----Original Message-----
> > From: Tim Harvey [mailto:tharvey at gateworks.com]
> > Sent: 2018年10月26日 5:10
> > To: Anatolij Gustschin <agust at denx.de>; Peng Fan <peng.fan at nxp.com>
> > Cc: u-boot <u-boot at lists.denx.de>; Stefano Babic <sbabic at denx.de>; Fabio
> > Estevam <fabio.estevam at nxp.com>
> > Subject: Re: [U-Boot] [PATCH v6 34/34] imx: add i.MX8QXP MEK board support
> >
> > On Thu, Oct 18, 2018 at 5:52 AM Anatolij Gustschin <agust at denx.de> wrote:
> > >
> > > From: Peng Fan <peng.fan at nxp.com>
> > >
> > > Add i.MX8QXP MEK board support
> > > Enabled pinctrl/clk/power-domain/mmc/i2c/fec driver.
> > > Added README file.
> > >
> > > Signed-off-by: Peng Fan <peng.fan at nxp.com>
> > > Reviewed-by: Anatolij Gustschin <agust at denx.de>
> > > Cc: Stefano Babic <sbabic at denx.de>
> > > Cc: Fabio Estevam <fabio.estevam at nxp.com>
> > > ---
> > >  arch/arm/dts/Makefile                     |   2 +
> > >  arch/arm/dts/fsl-imx8qxp-mek.dts          | 246
> > ++++++++++++++++++++++
> > >  arch/arm/mach-imx/imx8/Kconfig            |  13 ++
> > >  board/freescale/imx8qxp_mek/Kconfig       |  14 ++
> > >  board/freescale/imx8qxp_mek/MAINTAINERS   |   6 +
> > >  board/freescale/imx8qxp_mek/Makefile      |   7 +
> > >  board/freescale/imx8qxp_mek/README        |  72 +++++++
> > >  board/freescale/imx8qxp_mek/imx8qxp_mek.c | 170 +++++++++++++++
> > >  board/freescale/mx8mq_evk/README          |  81 +++++++
> >
> > Peng,
> >
> > Was the inclusion of the mx8mq_evk/README a mistake as this patch was
> > centered around adding support for the i.MX8QXP MEK board?
>
> That file was added by mistaken.
>
> >
> > I'm interested in building mainline U-Boot for the NXP i.MX 8M Quad Evaluation
> > Kit (IMX8MQUADEVKQSG) which I assume is what the mx8mq_evk is for. Do you
> > have plans to submit the rest of what's required for this board
> > (configs/mx8mq_evk_defconfig, board/freescale/mx8mq_evk/*,
> > arch/arm/dts/fsl-imx8mq-evk.dts).
> >
> > It looks like inclusion of imx8mq-evk was was in a patch series early this year and
> > got stalled for some reason?
>
> The ddr script is not good enough for upstream. I have asked help internal to restructure the code,
> but seems I have to be the guy working on this again.
>
> My current plan is the board support including ddr and mkimage could be ready in next RC1.
>

Peng,

Ok - thanks for the update. If you remember at the time please cc me
on the imx8mq-evk patch series and I will be happy to test.

I read through the discussion regarding the ddr init from your v5
submission (https://patchwork.ozlabs.org/patch/857974/). You mention
in that discussion that there is a ddr tool developed by NXP much like
the one used for i.MX6/7. I remember using a DDR config tool from
Freescale which was a spreadsheet and we ended up writing the ddr init
code for imx6 SPL that followed the equations in that spreadsheet
along with the ddr init sequence from the IMX6 reference manual. Could
this be done here as well?

Can you point me to the NXP DDR tool for IMX8? I'm just getting
started with the IMX8M and haven't run into it yet. DDR calibration
was a huge pain for us for IMX6.

Also, for your next submission for imx8m-evk please think about the following:
- rename mx8mq to imx8mq to be consistent with what you did for imx8qxp_mek
- consider adding a flash map to the README showing where imx-mkimage
is putting everything in the flash.bin image

I tried to apply your v5 imx8mq-evk patch on top of the latest master
but ran into build issues so I'm anxiously awaiting your next
submission!

Best Regards,

Tim