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SubjectRe: [PATCH v2 2/2] arm64: dts: qcom: db845c: Enable gpi_dma0 node
On 01-12-20, 19:06, Bjorn Andersson wrote:
> On Mon 30 Nov 22:25 CST 2020, Vinod Koul wrote:
>
> > gpi_dma0 can be used for spi and i2c transfers on db845c, so enable it
> >
> > Signed-off-by: Vinod Koul <vkoul@kernel.org>
> > ---
> > arch/arm64/boot/dts/qcom/sdm845-db845c.dts | 4 ++++
> > 1 file changed, 4 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > index 7cc236575ee2..0653468f26ce 100644
> > --- a/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > +++ b/arch/arm64/boot/dts/qcom/sdm845-db845c.dts
> > @@ -418,6 +418,10 @@ &gcc {
> > <GCC_QSPI_CNOC_PERIPH_AHB_CLK>;
> > };
> >
> > +&gpi_dma0 {
> > + status = "okay";
> > +};
> > +
>
> But you're only enabling the gpi, you don't have anything wired to it,
> so why enable it?
>
> I took a look downstream and they have all the i2c and spi nodes with
> their dmas filled out - and the two gpis enabled at all times
> (sdm845.dtsi). Can/should we do the same?

So dma is merged and in linux-next but support for spi/i2c is not as
that is dependent upon dmaengine interface introduced for this.

I was planning to post spi/i2c after rc1 and also the dts enabling them

--
~Vinod

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