[PATCH] dm: Add docs to explain how to enable DM_SERIAL for a board

[Tom Rini]

On Tue, Mar 15, 2022 at 08:24:54AM -0300, Fabio Estevam wrote:
> Hi Simon,
> 
> On Tue, Mar 15, 2022 at 2:54 AM Simon Glass <sjg at chromium.org> wrote:
> 
> > +For example, on iMX6::
> > +
> > +   lpuart3: serial at 5a090000 {
> > +      compatible = "fsl,imx8qm-lpuart";
> 
> I found this part confusing as i.MX6 does not have lpuart.
> 
> > +For example, on iMX6, put this in your xxx-u-boot.dtsi file::
> > +
> > +   &pd_dma {
> > +      u-boot,dm-pre-proper;
> > +   };
> > +
> > +   &pd_dma_lpuart3 {
> > +      u-boot,dm-pre-proper;
> 
> Same here, these pd_dma and pd_dma_lpuart3 nodes do not exist for i.MX6.

Yes, lets make sure we have examples here that are correct for a given
SoC.

-- 
Tom
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