Re: [PATCH] arm64: defconfig: Enable FSL_EDMA driver

[Li Yang]

On Thu, May 9, 2019 at 10:15 PM Shawn Guo <shawnguo@xxxxxxxxxx> wrote:
>
> On Mon, Apr 22, 2019 at 01:30:56PM -0500, Li Yang wrote:
> > Enables the FSL EDMA driver by default.  This also works around an issue
> > that imx-i2c driver keeps deferring the probe because of the DMA is not
> > ready.  And currently the DMA engine framework can not correctly tell
> > if the DMA channels will truly become available later (it will never be
> > available if the DMA driver is not enabled).
> >
> > This will cause indefinite messages like below:
> > [    3.335829] imx-i2c 2180000.i2c: can't get pinctrl, bus recovery not supported
> > [    3.344455] ina2xx 0-0040: power monitor ina220 (Rshunt = 1000 uOhm)
> > [    3.350917] lm90 0-004c: 0-004c supply vcc not found, using dummy regulator
> > [    3.362089] imx-i2c 2180000.i2c: can't get pinctrl, bus recovery not supported
> > [    3.370741] ina2xx 0-0040: power monitor ina220 (Rshunt = 1000 uOhm)
> > [    3.377205] lm90 0-004c: 0-004c supply vcc not found, using dummy regulator
> > [    3.388455] imx-i2c 2180000.i2c: can't get pinctrl, bus recovery not supported
> > .....
> >
> > Signed-off-by: Li Yang <leoyang.li@xxxxxxx>
>
> Applied, thanks.

Hi Shawn,

Is it possible to move this patch to the -fix series so that it can
reach the mainline earlier?  It is having a boot failure in mainline
for platforms using this device without this workaround.

I see Rob added a new API driver_deferred_probe_check_state() last
year.  Probably we should update the imx-i2c driver to use the new API
for optional dependencies to avoid this kind of situation completely?

Regards,
Leo