Re: [PATCH v3 3/5] ARM: dts: stm32: enable ltdc binding with ili9341 on stm32429-disco board

[Alexandre Torgue]

On 5/14/20 10:24 AM, Linus Walleij wrote:
> On Tue, May 12, 2020 at 9:04 AM <dillon.minfei@xxxxxxxxx> wrote:
>
> > From: dillon min <dillon.minfei@xxxxxxxxx>
> >
> > Enable the ltdc & ili9341 on stm32429-disco board.
> >
> > Signed-off-by: dillon min <dillon.minfei@xxxxxxxxx>
>
> This mostly looks good but...
>
> > +&spi5 {
> > +       status = "okay";
> > +       pinctrl-0 = <&spi5_pins>;
> > +       pinctrl-names = "default";
> > +       #address-cells = <1>;
> > +       #size-cells = <0>;
> > +       cs-gpios = <&gpioc 2 GPIO_ACTIVE_LOW>;
> > +       dmas = <&dma2 3 2 0x400 0x0>,
> > +              <&dma2 4 2 0x400 0x0>;
> > +       dma-names = "rx", "tx";
>
> These DMA assignments seem to be SoC things and should
> rather be in the DTS(I) file where &spi5 is defined, right?
> stm32f429.dtsi I suppose?

I agree with Linus, DMA have to be defined in SoC dtsi. And if a board 
doesn't want to use it, we use the "delete-property".

> It is likely the same no matter which device is using spi5.
>
> Yours,
> Linus Walleij